+publisher:"Delft University of Technology" +contributor:("Rots, Jan")

Delft University of Technology

1. Granata, Renato (author). Displacement-based verification of unreinforced masonry walls acting out-of-plane within a structural system.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:19567232-940e-40b3-87c6-fc027d58d7bc

► The out-of-plane behavior of unreinforced masonry walls subjected to lateral loading is a complex structural problem. This thesis focuses on the stability of URM walls… (more)

Subjects/Keywords: Masonry; Out-of-plane; Displacement-based; Groningen; unreinforced; URM

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Granata, R. (. (2017). Displacement-based verification of unreinforced masonry walls acting out-of-plane within a structural system. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:19567232-940e-40b3-87c6-fc027d58d7bc

Chicago Manual of Style (16^th Edition):

Granata, Renato (author). “Displacement-based verification of unreinforced masonry walls acting out-of-plane within a structural system.” 2017. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:19567232-940e-40b3-87c6-fc027d58d7bc.

MLA Handbook (7^th Edition):

Granata, Renato (author). “Displacement-based verification of unreinforced masonry walls acting out-of-plane within a structural system.” 2017. Web. 17 Jan 2021.

Vancouver:

Granata R(. Displacement-based verification of unreinforced masonry walls acting out-of-plane within a structural system. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:19567232-940e-40b3-87c6-fc027d58d7bc.

Council of Science Editors:

Granata R(. Displacement-based verification of unreinforced masonry walls acting out-of-plane within a structural system. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:19567232-940e-40b3-87c6-fc027d58d7bc

Delft University of Technology

2. XIE, Zihong (author). Sub-increment Based Iterative Constitutive Model for Cyclic Cracking-Crushing-Shearing in Masonry Interface Elements.

Degree: 2020, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:cfd2d5f1-9a2b-47fe-be1b-d02ba8a0e43f

► Masonry is one of the most commonly used construction materials for residential buildings and historic buildings around the world. Some of these buildings are located… (more)

▼ Masonry is one of the most commonly used construction materials for residential buildings and historic buildings around the world. Some of these buildings are located at seismic zones, while unreinforced masonry structures are vulnerable to seismic loads. To assess the existing masonry buildings and to design new masonry structures, nonlinear seismic simulations are conducted with macro modelling or micro modelling approach. The macro modelling approach, which smears out the details of the bricks and joints as a homogenous material, can efficiently and robustly model complete masonry structures. A commonly used orthotropic constitutive model is the Engineering Masonry Model of the DIANA FEA, which is based on the Total Strain Method that eliminates the mapping-back process in conventional elastoplastic constitutive models. The micro modelling approach, which explicitly models the bricks and joints, can better represent the mechanical behaviours of masonry. However, most of the constitutive models used in micro modelling are based on elastoplasticity that usually causes numerical difficulties due to its mapping-back process. The lack of a robust constitutive model has severely hindered the application of this accurate analysis approach. So, this thesis proposes a sub-increment based iterative constitutive model for interface elements, based on Multi-surface Plasticity Criterion. This model aims to enhance the robustness and accuracy of the constitutive model used for micro modelling. It eliminates the conventional mapping-back process in elastoplastic constitutive models by introducing the ideas of sequential uni-axial loading algorithm and an extra damage iterative calculation algorithm. These algorithms are robust even when the stress state is at the corners of the yield surface. The model also introduces the concept of sub-increments to consider the path dependency in plastic process. All the formulations of this constitutive model are derived based on a simple mechanical model. Formulas and examples are provided for obtaining the input parameters from material tests. The proposed constitutive model is tested on a single integration point level and found to be stable and reliable. It is further applied on the component level, by modelling three masonry walls of different dimensions and boundary conditions, under cyclic loading. For the verification of these wall models, the numerical results are compared with the experimental results in terms of force-displacement curve and crack pattern. Finally, the thesis presents a brief study on parameter sensitivity to provide guidelines for the level of accuracy needed for each input parameter, in order to get satisfactory numerical results. The constitutive model is found to be robust for all the wall analyses conducted, without encountering divergence. The comparison between numerical results and experimental results shows that this constitutive model can cover the majority of shear and flexural failure mechanisms and mimic the crack patterns well. It is… Advisors/Committee Members: Rots, Jan (mentor), Messali, Francesco (mentor), Sousamli, Marianthi (mentor), Ravenshorst, Geert (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Finite Element Method; constitutive model; interface element; masonry; discrete crack model; mirco modelling; cracking-crushing-shearing; cyclic loading

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

XIE, Z. (. (2020). Sub-increment Based Iterative Constitutive Model for Cyclic Cracking-Crushing-Shearing in Masonry Interface Elements. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:cfd2d5f1-9a2b-47fe-be1b-d02ba8a0e43f

Chicago Manual of Style (16^th Edition):

XIE, Zihong (author). “Sub-increment Based Iterative Constitutive Model for Cyclic Cracking-Crushing-Shearing in Masonry Interface Elements.” 2020. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:cfd2d5f1-9a2b-47fe-be1b-d02ba8a0e43f.

MLA Handbook (7^th Edition):

XIE, Zihong (author). “Sub-increment Based Iterative Constitutive Model for Cyclic Cracking-Crushing-Shearing in Masonry Interface Elements.” 2020. Web. 17 Jan 2021.

Vancouver:

XIE Z(. Sub-increment Based Iterative Constitutive Model for Cyclic Cracking-Crushing-Shearing in Masonry Interface Elements. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:cfd2d5f1-9a2b-47fe-be1b-d02ba8a0e43f.

Council of Science Editors:

XIE Z(. Sub-increment Based Iterative Constitutive Model for Cyclic Cracking-Crushing-Shearing in Masonry Interface Elements. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:cfd2d5f1-9a2b-47fe-be1b-d02ba8a0e43f

Delft University of Technology

3. Teshome, Tihitina Tilahun (author). Model Uncertainty of Non-Linear Finite Element Analysis of Reinforced Concrete Beams without Shear Reinforcement: Examining the Effect of Modelling Strategies and Modes of Failure.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:c5b222e7-fb93-4c63-9796-251e56ef8ca0

► The aim of this thesis project is to investigate the model uncertainty of non-linear finite element analysis of reinforced concrete structures at ultimate limit state… (more)

▼ The aim of this thesis project is to investigate the model uncertainty of non-linear finite element analysis of reinforced concrete structures at ultimate limit state by focusing on concrete cracking model, concrete-reinforcement interaction model and mesh size. Following this, eight finite element modelling strategies are developed and 67 benchmark experiments on reinforced concrete beams without shear reinforcement are analysed.The measure of model uncertainty is using the ratio of experimental to numerical failure load and comparing predicted and experimental failure behaviour. A ratio that deviates form 1 indicates high model uncertainty with values <1 representing non-conservative predictions and values >1 representing conservative predictions.The eight modelling strategies are categorized into three groups. The first group is used to select shear retention model for the fixed crack concept and to study the behaviour of fixed and rotating crack concepts in combination with embedded reinforcement. The damage based and aggregate-size based shear retention models are investigated resulting in a mean model uncertainty ratio of 0.86 and 0.82 respectively. This indicates that on average both predict higher ultimate capacity when compared to experimental results with the aggregate size based shear retention model exhibiting higher model uncertainty. The aggregate size based model is not capable of predicting shear and mixed failure types while the damage based predicted accurate failure modes. On the other hand, the rotating crack model with embedded reinforcement shows failure due to delamination of the concrete cover. Replacement of the perfectly bonded embedded reinforcement by reinforcement with bond-slip demonstrated to predict accurate failure modes.The second group has the fixed crack model with damage based shear retention model and embedded reinforcement, which is referred to as F-EB-2-D and rotating crack model with bond-slip reinforcement named R-BS-2. Both modelling strategies have 50mm mesh size and result in mean model uncertainty ratio of 1.11 and 1.06 respectively which implies that on average both give conservative predictions of the ultimate capacity with R-BS-2 showing a better prediction. Both modelling strategies give higher model uncertainty for experiments with shear failure with F-EB-2-D and R-BS-2 predicting accurate failure modes for 48% and 51% of the experiments respectively. The beams with reinforcement ratio of ≤ 0.6% showed on average less model uncertainty in F-EB-2-D and R-BS-2. The third group is made by refining the mesh size of F-EB-2-D and R-BS-2 from 50mm to 25mm in critical section of the beams to formulate the modelling strategies F-EB-3-D and R-BS-3 . 16 experiments are re-analysed using this group and a lowered mean model uncertainty ratio of 0.93 and 0.95 is obtained for F-EB-3-D and R-BS-3 respectively although this is slightly non-conservative with accurate predictions for 81% of the 16 experiments. The correlation between model uncertainty and numerical failure… Advisors/Committee Members: Hendriks, Max (graduation committee), Rots, Jan (mentor), Yang, Yuguang (graduation committee), Engen, Morten (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Non-Linear Finite Element Analysis; model uncertainty; Reinforced Concrete structures

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Teshome, T. T. (. (2019). Model Uncertainty of Non-Linear Finite Element Analysis of Reinforced Concrete Beams without Shear Reinforcement: Examining the Effect of Modelling Strategies and Modes of Failure. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:c5b222e7-fb93-4c63-9796-251e56ef8ca0

Chicago Manual of Style (16^th Edition):

Teshome, Tihitina Tilahun (author). “Model Uncertainty of Non-Linear Finite Element Analysis of Reinforced Concrete Beams without Shear Reinforcement: Examining the Effect of Modelling Strategies and Modes of Failure.” 2019. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:c5b222e7-fb93-4c63-9796-251e56ef8ca0.

MLA Handbook (7^th Edition):

Teshome, Tihitina Tilahun (author). “Model Uncertainty of Non-Linear Finite Element Analysis of Reinforced Concrete Beams without Shear Reinforcement: Examining the Effect of Modelling Strategies and Modes of Failure.” 2019. Web. 17 Jan 2021.

Vancouver:

Teshome TT(. Model Uncertainty of Non-Linear Finite Element Analysis of Reinforced Concrete Beams without Shear Reinforcement: Examining the Effect of Modelling Strategies and Modes of Failure. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:c5b222e7-fb93-4c63-9796-251e56ef8ca0.

Council of Science Editors:

Teshome TT(. Model Uncertainty of Non-Linear Finite Element Analysis of Reinforced Concrete Beams without Shear Reinforcement: Examining the Effect of Modelling Strategies and Modes of Failure. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:c5b222e7-fb93-4c63-9796-251e56ef8ca0

Delft University of Technology

4. Dolron, Pieter (author). An evaluation of safety assessment methods for a reinforced concrete frame using non-linear finite element analyses.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:566adfe1-1f1b-4060-8847-74ad797d4cf2

►

In order to perform a reassessment of existing structures or design new structures in a more efficient and economical way non-linear finite element (NLFE) models… (more)

▼

In order to perform a reassessment of existing structures or design new structures in a more efficient and economical way non-linear finite element (NLFE) models are used to take into account all non-linear behavior in reinforced concrete structures. The Model Code 2010 (fib, 2012) suggest several safety formats to perform non-linear finite element analyses with an intended reliability index β_R=3.04. The safety formats seems to be safe for statically determinate structures with a predictable failure mode. For instance a bending failure in a simply supported reinforced concrete beam. However it is unclear if the intended safety level is met for statically indeterminate structures. Since the redundancy of the structural system and the several possibilities to redistribute the internal forces could lead to unpredictable failure modes. In this thesis three reinforced concrete portal frame designs are used to evaluate the probability of failure of the structural resistance determined with the safety formats i.e. the safety of the safety formats will be assessed. The ductility of the portal frame designs determines the degree of redistribution of the internal forces. Therefore this case study will focus on three portal frame designs with all a different ductile behavior. The global design resistance is determined according to the following safety formats: the global resistance factor method (GRFm), the estimation of a coefficient of variation (ECOV) method and the partial factor method (PFm). A comparison is made with the local design resistance of the portal frame designs according to the Eurocode 2 using partial safety factors. The reliability level of the structural design resistance according to the least conservative safety formats is determined for each portal frame design. Several response surfaces were constructed and the first order reliability method (FORM) was used to determine the reliability level. In case of relatively low material and geometrical uncertainties the safety formats lead to a structural resistance that can safely be used i.e. the intended reliability level is met. However when the detailing uncertainties in concrete frame corners are relatively large these uncertainties should be implemented in the safety formats. Further research and more experimental results are needed to make a better estimation of the (model) uncertainties possible. Finally, the used methods are evaluated and several comments are given on the difficulties of using those methods. Constructing a response surface in combination with the FORM in order to find the design point is definitely not an automated process as the mathematical procedures seems to indicate.

Structural Engineering

Advisors/Committee Members: Hendriks, Max (mentor), Rots, Jan (graduation committee), Yang, Yuguang (graduation committee), Steenbergen, R.D.J.M. (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: non-Linear Finite Element Analysis; safety formats; safety assessment; first order reliability method; FORM; response surface; NLFEA; Model Code 2010; Eurocode 2

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dolron, P. (. (2018). An evaluation of safety assessment methods for a reinforced concrete frame using non-linear finite element analyses. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:566adfe1-1f1b-4060-8847-74ad797d4cf2

Chicago Manual of Style (16^th Edition):

Dolron, Pieter (author). “An evaluation of safety assessment methods for a reinforced concrete frame using non-linear finite element analyses.” 2018. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:566adfe1-1f1b-4060-8847-74ad797d4cf2.

MLA Handbook (7^th Edition):

Dolron, Pieter (author). “An evaluation of safety assessment methods for a reinforced concrete frame using non-linear finite element analyses.” 2018. Web. 17 Jan 2021.

Vancouver:

Dolron P(. An evaluation of safety assessment methods for a reinforced concrete frame using non-linear finite element analyses. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:566adfe1-1f1b-4060-8847-74ad797d4cf2.

Council of Science Editors:

Dolron P(. An evaluation of safety assessment methods for a reinforced concrete frame using non-linear finite element analyses. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:566adfe1-1f1b-4060-8847-74ad797d4cf2

Delft University of Technology

5. De Marco, Andrea (author). Application of Evolutionary Structural Optimization to Reinforced Concrete Structures.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:efd1ad24-017f-48ac-8e31-184339a9d148

► The present thesis has the objective to create a procedure for the automatic preliminary design of reinforced concrete structures, based on the Evolutionary Structural Optimization… (more)

▼ The present thesis has the objective to create a procedure for the automatic preliminary design of reinforced concrete structures, based on the Evolutionary Structural Optimization method (ESO). The developed algorithm performs heuristic topology optimization based on multiple criteria, in subsequent optimization cycles executed in series. In each ESO cycle, it is possible to perform material addition, removal or transition between a couple of materials, i.e. steel, concrete and void. Each optimization cycle is governed by an optimality criterion chosen from: stiffness, Von Mises, Drucker-Prager, tension stress criteria or linear interpolation of previous ones. The finite element analysis used in the algorithm regards all materials as linear elastic. The reaching of maximum strength and failure of materials is not taken into account. The automated design process of reinforced concrete structures has been separated in two problems: the form-finding of reinforced concrete structure as a whole and the definition of internal distribution between steel and concrete. The first problem is solved, in the first optimization cycle, with a ``standard'' ESO procedure, with the only difference in choosing a Von Mises optimization criterion over a ``classical'' stiffness criterion. The second problem is solved, in the second and third optimization cycles, combining in series two additional ``modified'' ESO procedures and introducing gradual transition in optimization criteria through linear interpolation of sensitivity numbers. The combined criteria for the second cycle are a Von Mises and Drucker-Prager optimization criteria, while for the third cycle, a Drucker-Prager and tensile stress optimization criteria. Moreover, additional geometrical constraints are applied, to ensure a set minimal distance between steel and outer boundaries, i.e. concrete cover, and to ensure optimal angle preservation for steel members found during optimization, introducing two new ``density'' matrices called \emph{cover} and \emph{mask}. Summarizing, the preliminary design of reinforced concrete structures is dealt with three cycles of ESO optimization procedures executed in series, with optimization criteria that gradually change with continuity between the different cycles over the whole process. The developed procedure has been tested on several case studies, both from ESO and reinforced concrete literature. The defined ESO process has been found to generate solutions with steel correctly placed in tensile stress zones both to resist bending and shear. Generally, the presence of remaining tensile stresses in concrete zones in the solutions is absent or very limited, and in latter cases their magnitude is very small compared to other stresses. Obtained solutions cannot be directly used as such for reinforcement layouts definition but, in combination with principal stresses plots and engineering judgement, they are able to suggest useful resulting reinforcement layouts. As result of the specificities introduced for… Advisors/Committee Members: Hendriks, Max (mentor), Rots, Jan (graduation committee), Braam, Rene (graduation committee), Langelaar, Matthijs (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Evolutionary Structural Optimization; Bi-directional Evolutionary Structural Optimization; Computational Optimization; Topology Optimization; Structural Optimization; Heuristic Optimization; ESO; BESO; Optimization Algorithm; Optimization Procedure; Reinforced Concrete Structures; Reinforced Concrete Design; Reinforced Concrete

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

De Marco, A. (. (2018). Application of Evolutionary Structural Optimization to Reinforced Concrete Structures. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:efd1ad24-017f-48ac-8e31-184339a9d148

Chicago Manual of Style (16^th Edition):

De Marco, Andrea (author). “Application of Evolutionary Structural Optimization to Reinforced Concrete Structures.” 2018. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:efd1ad24-017f-48ac-8e31-184339a9d148.

MLA Handbook (7^th Edition):

De Marco, Andrea (author). “Application of Evolutionary Structural Optimization to Reinforced Concrete Structures.” 2018. Web. 17 Jan 2021.

Vancouver:

De Marco A(. Application of Evolutionary Structural Optimization to Reinforced Concrete Structures. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:efd1ad24-017f-48ac-8e31-184339a9d148.

Council of Science Editors:

De Marco A(. Application of Evolutionary Structural Optimization to Reinforced Concrete Structures. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:efd1ad24-017f-48ac-8e31-184339a9d148

Delft University of Technology

6. Danks, Brigitte (author). Validation of Sequentially Linear Analysis for Quasi-Brittle Behaviour of Reinforced Concrete Structures under Proportional and Non-Proportional Loading.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:a242d5b5-ff2a-4216-b04c-6de185a1044d

► The aim of this thesis was to objectively and quantitatively assess the accuracy and robustness of two-dimensional sequentially linear analysis (SLA) in comparison to nonlinear… (more)

▼ The aim of this thesis was to objectively and quantitatively assess the accuracy and robustness of two-dimensional sequentially linear analysis (SLA) in comparison to nonlinear finite element analysis (NLFEA), for a range of experiments of reinforced concrete structures with proportional and non-proportional loading schemes. Non-proportional loading refers to when two or more load cases act on a structure that do not increase or decrease in a proportional way. Accuracy was defined as the degree to which the finite element model's results match the experimental results. Robustness was defined as the method's ease of completing the computation and objectivity with respect to user-specified input. In selecting the benchmarks, experiments with brittle or quasi-brittle failures were targeted. Two experiments with proportional loading (a shear beam and a corbel) and three with non-proportional loading (a shear wall, a flexural beam, and a frame) were selected as the benchmarks. The frame is a single-span, double-storey frame, and thus consists of more structural elements than the other benchmarks. Each experiment chosen had previously been analysed using NLFEA by either the experiment conductor or another in academia. The five benchmark cases were modelled with SLA using a consistent solution strategy. The material constitutive models were discretised using the (standard) ripple band width saw-tooth law, which defines an upper and lower band of the softening and plasticity relations via a factor (p) of the material strength. Four performance parameters were devised to assess the performance of the SLA and NLFEA for each benchmark in the pre-peak, peak and post-peak stages, by comparing the modelling of the structural stiffness, peak load, ductility and ability to model post-peak behaviour to experimental results (where applicable). Inhibitors to the method's accuracy include the inaccurate modelling of stress reversal, which creates unrealistic crack openings and closures; delayed and limited yielding of reinforcement due to the discretisation of the Von Mises plasticity, resulting in overestimation of structural capacity and underestimation of ductility; lack of consideration of geometrical non-linearity; and small inaccuracies in the modelled saw-tooth relations resulting in some overestimation of reduced strength values during material softening and spurious transverse crack strains. Additionally the accuracy was limited by the simplification of the concrete material model and use of the linear tensile softening relation. Inhibitors to the robustness of the SLA included lack of objectivity to some user-specified input and intermittent proportional loading limiting the amount of post-peak behaviour successfully modelled in the non-proportionally loaded benchmarks. Overall, SLA was found to have a comparable level of accuracy with NLFEA in modelling reinforced concrete structures in both proportional and non-proportional loading scenarios, with many benefits observed in terms of increased robustness. The inaccurate stress… Advisors/Committee Members: Hendriks, Max (mentor), Rots, Jan (graduation committee), Pari, Manimaran (graduation committee), Yang, Yuguang (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Sequentially; linear; analysis; finite; element; non-proportional; loading; reinforced; concrete; structures; accuracy; robustness; objective; validation; DIANA

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Danks, B. (. (2019). Validation of Sequentially Linear Analysis for Quasi-Brittle Behaviour of Reinforced Concrete Structures under Proportional and Non-Proportional Loading. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:a242d5b5-ff2a-4216-b04c-6de185a1044d

Chicago Manual of Style (16^th Edition):

Danks, Brigitte (author). “Validation of Sequentially Linear Analysis for Quasi-Brittle Behaviour of Reinforced Concrete Structures under Proportional and Non-Proportional Loading.” 2019. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:a242d5b5-ff2a-4216-b04c-6de185a1044d.

MLA Handbook (7^th Edition):

Danks, Brigitte (author). “Validation of Sequentially Linear Analysis for Quasi-Brittle Behaviour of Reinforced Concrete Structures under Proportional and Non-Proportional Loading.” 2019. Web. 17 Jan 2021.

Vancouver:

Danks B(. Validation of Sequentially Linear Analysis for Quasi-Brittle Behaviour of Reinforced Concrete Structures under Proportional and Non-Proportional Loading. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:a242d5b5-ff2a-4216-b04c-6de185a1044d.

Council of Science Editors:

Danks B(. Validation of Sequentially Linear Analysis for Quasi-Brittle Behaviour of Reinforced Concrete Structures under Proportional and Non-Proportional Loading. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:a242d5b5-ff2a-4216-b04c-6de185a1044d

Delft University of Technology

7. Dierker Viik, Leah (author). StructuralComponents 6: An early-stage design tool for flexible topologies of mid-rise concrete buildings.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:a582d714-bd9c-48e5-9a74-36de7ec4e3c9

►

The development of computational tools to aid with early-stage design of buildings is an emerging topic of great value. Developing a good conceptual design for… (more)

Subjects/Keywords: parametric design; conceptual design; Grasshopper; structural analysis; computational design; concrete structure

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dierker Viik, L. (. (2019). StructuralComponents 6: An early-stage design tool for flexible topologies of mid-rise concrete buildings. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:a582d714-bd9c-48e5-9a74-36de7ec4e3c9

Chicago Manual of Style (16^th Edition):

Dierker Viik, Leah (author). “StructuralComponents 6: An early-stage design tool for flexible topologies of mid-rise concrete buildings.” 2019. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:a582d714-bd9c-48e5-9a74-36de7ec4e3c9.

MLA Handbook (7^th Edition):

Dierker Viik, Leah (author). “StructuralComponents 6: An early-stage design tool for flexible topologies of mid-rise concrete buildings.” 2019. Web. 17 Jan 2021.

Vancouver:

Dierker Viik L(. StructuralComponents 6: An early-stage design tool for flexible topologies of mid-rise concrete buildings. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:a582d714-bd9c-48e5-9a74-36de7ec4e3c9.

Council of Science Editors:

Dierker Viik L(. StructuralComponents 6: An early-stage design tool for flexible topologies of mid-rise concrete buildings. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:a582d714-bd9c-48e5-9a74-36de7ec4e3c9

Delft University of Technology

8. Yang, Boyuan (author). Comparisons of implicit and explicit time integration methods in finite element analysis for linear elastic material and quasi-brittle material in dynamic problems.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:3bf6605b-c108-4de8-a5fa-6305f7321ff4

► In finite element analysis, nonlinear time-history analysis is a realistic and accurate analysis type for dynamic or seismic analysis due to its solutions contain wealthy… (more)

▼ In finite element analysis, nonlinear time-history analysis is a realistic and accurate analysis type for dynamic or seismic analysis due to its solutions contain wealthy data and complete response time-history. The most commonly used method, probably the only practical procedure, in nonlinear time-history analysis is the direct time integration method. In general, every direct time integration method could be classified as either an implicit method or an explicit method. Understanding the differences between the two categories in both theoretical and practical aspects is very important for engineers to make the best analysis strategy for a specific dynamic or seismic analysis. In this treatise, the most popular method in each category, i.e., implicit Newmark method and explicit central difference method, will be introduced and used in transient analyses and results comparisons. In total, five cases studies are included in this thesis, including three cases with linear elastic materials and two cases with quasi-brittle masonry material. These five cases are studied to answer the main research questions of this research: What differences can be observed in comparisons of solutions obtained from implicit and explicit methods for linear elastic material in transient analysis and for quasi-brittle material under seismic load? Also, how are the performances of both methods with respect to the stability and accuracy aspects? The results comparisons show that for linear elastic material, both methods could generate accurate solutions with proper time steps. However, the explicit method shows a better representation of the high-frequency response of the structure. For quasi-brittle masonry material, both methods are possible to generate good results. However, the implicit method may have convergence problems during the iterations, which could lead to inaccurate predictions of nonlinear behavior of the structure. The explicit method shows very good predictions for nonlinear behavior, but the computation time is quite long and the critical time step is highly influenced by many factors in the finite element model. Moreover, the mass scaling technique, which is generally used in the explicit method, is also investigated in this thesis. Advisors/Committee Members: Hendriks, Max (mentor), Rots, Jan (graduation committee), Tsouvalas, Apostolos (graduation committee), Schreppers, G.M.A (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Finite Element Analysis; DIANA FEA; Direct time integration; Implicit method; Explicit method; Nonlinear Dynamics; Masonry material

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yang, B. (. (2019). Comparisons of implicit and explicit time integration methods in finite element analysis for linear elastic material and quasi-brittle material in dynamic problems. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:3bf6605b-c108-4de8-a5fa-6305f7321ff4

Chicago Manual of Style (16^th Edition):

Yang, Boyuan (author). “Comparisons of implicit and explicit time integration methods in finite element analysis for linear elastic material and quasi-brittle material in dynamic problems.” 2019. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:3bf6605b-c108-4de8-a5fa-6305f7321ff4.

MLA Handbook (7^th Edition):

Yang, Boyuan (author). “Comparisons of implicit and explicit time integration methods in finite element analysis for linear elastic material and quasi-brittle material in dynamic problems.” 2019. Web. 17 Jan 2021.

Vancouver:

Yang B(. Comparisons of implicit and explicit time integration methods in finite element analysis for linear elastic material and quasi-brittle material in dynamic problems. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:3bf6605b-c108-4de8-a5fa-6305f7321ff4.

Council of Science Editors:

Yang B(. Comparisons of implicit and explicit time integration methods in finite element analysis for linear elastic material and quasi-brittle material in dynamic problems. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:3bf6605b-c108-4de8-a5fa-6305f7321ff4

Delft University of Technology

9. Verhoog, Thomas (author). Predicting results of geometrical nonlinear FE analyses using Artificial Neural Networks: Applied to stiffened steel plated structures in sea lock gates.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:8abc0a81-9efe-48c8-b539-23bf03ef3388

► In this research project, an attempt is made to fuse the fields of structural mechanics and machine learning. The goal is to find out if… (more)

▼ In this research project, an attempt is made to fuse the fields of structural mechanics and machine learning. The goal is to find out if models can be created that are capable of predicting the outcomes of (nonlinear) finite element analyses. These models are created by means of Artificial Neural Networks, which is a powerful method in the domain of machine learning. The focus will be on stiffened steel plated structures that are part of a sea lock gate. The power of a trained neural network is that it is able to compute the output for a given set of input parameters within a fraction of a second. Running a complete finite element analysis on the other hand can take a significant amount of time, especially in case of geometrically and/or physically nonlinear analyses. When relying on nonlinear finite element analyses for performing a structural design optimization, a trained network can therefore save a huge amount of time. It also allows to evaluate many more design options, possibly finding a more optimal design than what would be possible with a manual design optimization. An automated procedure has been created to generate datasets by running FE analyses in batch mode. Parametric models are set up in ANSYS FE software, for which random sets of input parameters are generated. After running the analyses, the output is collected and organised in datasets that can be used for training. The sizes of the datasets and the dimensionality of the design spaces are varied in order to study the influence of these quantities on the accuracies of the predictions produced by the neural networks. Genetic algorithms, which is another machine learning technique, are deployed for the optimization of the it{hyperparameters} of the neural networks, which are basically the it{settings} of the network which determine the learning behaviour. Three standard interpolation techniques (Kriging and polynomial interpolation) are also fitted to the same datasets in order to compare the performance of the neural networks to these interpolation techniques. The final result is an overview of the accuracies of the predictions made with the neural networks on validation datasets. It was found that the neural networks produced accurate predictions on the maximum deflection of a simply supported, stiffened steel plate loaded by a uniform pressure. Most of the relative errors were within a range of 5% error for design problems with 4 dimensions. Predictions of the linear buckling load of stiffened steel plates were found to be mostly within the range of 10% error for design problems with 4 dimensions. When increasing the number of free design variables from 4 to 8, the errors were found to be mostly within the range of 20% error. The predictions of maximum equivalent stresses in stiffened steel plated sections obtained by geometrically nonlinear FE analyses were found to be in the range of ± 20%. These models had 13 free design variables. Improvements were made on the available options of hyperparameters for neural networks. With… Advisors/Committee Members: Rots, Jan (mentor), Hoogenboom, Pierre (mentor), Abspoel, Roland (mentor), van Lierop, Pieter (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Neural Networks; Non linear finite element analysis; Parametric Design; Genetic algorithms; Sea lock gates; Plate buckling; ANSYS APDL

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Verhoog, T. (. (2019). Predicting results of geometrical nonlinear FE analyses using Artificial Neural Networks: Applied to stiffened steel plated structures in sea lock gates. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:8abc0a81-9efe-48c8-b539-23bf03ef3388

Chicago Manual of Style (16^th Edition):

Verhoog, Thomas (author). “Predicting results of geometrical nonlinear FE analyses using Artificial Neural Networks: Applied to stiffened steel plated structures in sea lock gates.” 2019. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:8abc0a81-9efe-48c8-b539-23bf03ef3388.

MLA Handbook (7^th Edition):

Verhoog, Thomas (author). “Predicting results of geometrical nonlinear FE analyses using Artificial Neural Networks: Applied to stiffened steel plated structures in sea lock gates.” 2019. Web. 17 Jan 2021.

Vancouver:

Verhoog T(. Predicting results of geometrical nonlinear FE analyses using Artificial Neural Networks: Applied to stiffened steel plated structures in sea lock gates. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:8abc0a81-9efe-48c8-b539-23bf03ef3388.

Council of Science Editors:

Verhoog T(. Predicting results of geometrical nonlinear FE analyses using Artificial Neural Networks: Applied to stiffened steel plated structures in sea lock gates. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:8abc0a81-9efe-48c8-b539-23bf03ef3388

Delft University of Technology

10. Slooten, Elgar (author). Feasibility study of a wood-concrete hybrid super tall building and optimization of its wind-induced behaviour: A case study on a skyscraper in the city-centre of Rotterdam.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:01da1849-6478-46c9-8a59-e6c7c2e4fb47

► The demand for sustainable high-rise buildings is growing. Such sustainable high-rise could be realized by the use of mass timber for the structural design instead… (more)

▼ The demand for sustainable high-rise buildings is growing. Such sustainable high-rise could be realized by the use of mass timber for the structural design instead of more conventional building materials such as steel and concrete. Timber is a renewable resource which can be CO₂ neutral if reforestation takes place to close its carbon cycle. In addition, the light-weight of timber reduces the loads on the foundation, and the timber could be used as an architectural feature as well. The height boundaries for tall timber buildings are currently extending, as illustrated by the ongoing realization of a 70 metres tall timber building in Amsterdam. However, the light-weight of timber make tall timber buildings prone to dynamic wind loading. In addition, the current trend to design slender high-rise further increases the wind-induced dynamic response of the building. In this thesis, the technical feasibility of a super tall hybrid wood-concrete building was evaluated and its wind-induced dynamic behaviour was optimized. To this end a 300m tall building of timber and concrete was designed for construction in the city-centre of Rotterdam, The Netherlands. Due to the absence of seismic activity in the area, wind loading was identified as the governing parameter for lateral stability design. The structural design was therefore optimized to satisfy serviceability criteria for lateral drift and occupant comfort. Based on these requirements, the structure was designed as a reinforced concrete core surrounded by a glued-laminated timber (GLT) frame and floor slabs consisting of a cross-laminated timber (CLT) panel with a thin concrete top layer. Lateral stability was ensured by an outrigger/belt-truss system at three levels, resulting in a significant increase of the global stiffness in the structure, and in a reduction of the maximum lateral inter-storey drift by a factor two. In order to fully design a 300m tall wood-concrete hybrid building, design aspects such as the floor plan, core layout, lateral stability system and timber frame were designed first. The floor plan layout and storey height were based on a typical office building. The length from the perimeter to the core of the building was set to 9 metres and a storey height 3.75 metres was applied. These dimensions ensured that enough sunlight would fall into the office spaces. The entrance level with double storey height was performed in reinforced concrete to create a more open layout and to achieve a higher safety in the case of accidental blast loading. Stiffness optimization of the structure was carried out in order to satisfy the serviceability criteria for lateral inter-storey drift and displacement. Consequently, a parametric study of the cross-sectional dimension of the columns, of the thickness of the reinforced concrete core wall, and of the outrigger/belt-truss layout was performed. The cross-sectional dimension of the columns and the thickness of the core wall were tapered down over the height of the structure. A… Advisors/Committee Members: Rots, Jan (graduation committee), Ravenshorst, Geert (graduation committee), Hoogenboom, Pierre (graduation committee), van Eerden, A.R. (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: tall timber building; wind-induced dynamic behaviour; occupant comfort; tuned mass damper; shape optimization; High-Rise

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Slooten, E. (. (2018). Feasibility study of a wood-concrete hybrid super tall building and optimization of its wind-induced behaviour: A case study on a skyscraper in the city-centre of Rotterdam. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:01da1849-6478-46c9-8a59-e6c7c2e4fb47

Chicago Manual of Style (16^th Edition):

Slooten, Elgar (author). “Feasibility study of a wood-concrete hybrid super tall building and optimization of its wind-induced behaviour: A case study on a skyscraper in the city-centre of Rotterdam.” 2018. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:01da1849-6478-46c9-8a59-e6c7c2e4fb47.

MLA Handbook (7^th Edition):

Slooten, Elgar (author). “Feasibility study of a wood-concrete hybrid super tall building and optimization of its wind-induced behaviour: A case study on a skyscraper in the city-centre of Rotterdam.” 2018. Web. 17 Jan 2021.

Vancouver:

Slooten E(. Feasibility study of a wood-concrete hybrid super tall building and optimization of its wind-induced behaviour: A case study on a skyscraper in the city-centre of Rotterdam. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:01da1849-6478-46c9-8a59-e6c7c2e4fb47.

Council of Science Editors:

Slooten E(. Feasibility study of a wood-concrete hybrid super tall building and optimization of its wind-induced behaviour: A case study on a skyscraper in the city-centre of Rotterdam. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:01da1849-6478-46c9-8a59-e6c7c2e4fb47

Delft University of Technology

11. Meiring, Cynthia (author). Validation of Sequentially Linear Analysis by simulating structural behaviour of masonry components.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:027d70b4-e1bc-4fdf-8d41-7dafb4a00b54

► The unreinforced masonry construction of Dutch terraced houses in Groningen is prone to lateral earthquake loading. To analyse the capacity of these houses, the faculty… (more)

Subjects/Keywords: Sequentially Linear Analysis; Masonry; Brittle behaviour; Numerical modelling

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Meiring, C. (. (2018). Validation of Sequentially Linear Analysis by simulating structural behaviour of masonry components. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:027d70b4-e1bc-4fdf-8d41-7dafb4a00b54

Chicago Manual of Style (16^th Edition):

Meiring, Cynthia (author). “Validation of Sequentially Linear Analysis by simulating structural behaviour of masonry components.” 2018. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:027d70b4-e1bc-4fdf-8d41-7dafb4a00b54.

MLA Handbook (7^th Edition):

Meiring, Cynthia (author). “Validation of Sequentially Linear Analysis by simulating structural behaviour of masonry components.” 2018. Web. 17 Jan 2021.

Vancouver:

Meiring C(. Validation of Sequentially Linear Analysis by simulating structural behaviour of masonry components. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:027d70b4-e1bc-4fdf-8d41-7dafb4a00b54.

Council of Science Editors:

Meiring C(. Validation of Sequentially Linear Analysis by simulating structural behaviour of masonry components. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:027d70b4-e1bc-4fdf-8d41-7dafb4a00b54

Delft University of Technology

12. Koning, Laetitia (author). Digital Fabrication of a Timber Bridge: Design, optimisation, fabrication and testing at global and connection level.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:0298448c-5bad-4760-9382-06d58ed07edc

►

Rapid developments of both new (digital) fabrication techniques and innovative software facilitate the possibility to design, check and construct objects with great complexity and uniqueness… (more)

▼

Rapid developments of both new (digital) fabrication techniques and innovative software facilitate the possibility to design, check and construct objects with great complexity and uniqueness without a large price tag. After new techniques slowly entered the field of architecture, the next step is to apply them in civil engineering to design load-bearing structures, dealing with a large number of load cases, outdoor conditions and strict safety requirements. The application of digital fabrication in civil engineering is examined through a case study: the design of a pedestrian frame bridge made of timber using CNC-milling techniques. In this research a strong focus is on the design, optimisation, detailing and testing of the connections. This research demonstrates that the combination of a reciprocal gridshell structure in combination with interlocking joints (lap joints) is particularly suitable for digital timber fabrication since a stable system can be obtained without the use of fasteners. The uniqueness of all connections and the strong relation between them makes the design process complex. Nevertheless, with the help of digital design tools like Grasshopper and evolutionary it is possible to deal with a large number of parameters with a complex relation between them. Additionally lab tests were carried out to get insight in the shear capacity of notched members. The tests show that the verification method for notched members in Eurocode 5 does not accurately predict the shear strength when hardwood is applied. Additional research on the fracture energy of hardwood is required to propose an improved calculation method. Furthermore, the tests have shown that the application of rounded edges and screws as reinforcement significantly improve the shear capacity of notched members. It is therefore always advised to apply rounded edges, if possible in combination with screws. All in all, the case study has shown that it is possible to design a load bearing free-form gridshell timber structure on both global and connection level, using the advantages of digital design and fabrication techniques.

Structural Engineering

Advisors/Committee Members: Hendriks, Max (mentor), Ravenshorst, Geert (mentor), Rots, Jan (mentor), Joosten, Stijn (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Digital Fabrication; cnc milling; Interlocking joint; Japanese connections; Gridshell; notched members; timber; bridge; machine learning; optimisation; free-form; reciprocal; lap joint

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Koning, L. (. (2018). Digital Fabrication of a Timber Bridge: Design, optimisation, fabrication and testing at global and connection level. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:0298448c-5bad-4760-9382-06d58ed07edc

Chicago Manual of Style (16^th Edition):

Koning, Laetitia (author). “Digital Fabrication of a Timber Bridge: Design, optimisation, fabrication and testing at global and connection level.” 2018. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:0298448c-5bad-4760-9382-06d58ed07edc.

MLA Handbook (7^th Edition):

Koning, Laetitia (author). “Digital Fabrication of a Timber Bridge: Design, optimisation, fabrication and testing at global and connection level.” 2018. Web. 17 Jan 2021.

Vancouver:

Koning L(. Digital Fabrication of a Timber Bridge: Design, optimisation, fabrication and testing at global and connection level. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:0298448c-5bad-4760-9382-06d58ed07edc.

Council of Science Editors:

Koning L(. Digital Fabrication of a Timber Bridge: Design, optimisation, fabrication and testing at global and connection level. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:0298448c-5bad-4760-9382-06d58ed07edc

Delft University of Technology

13. Dhanmeher, Saurabh (author). Crack pattern observations to finite element simulation: An exploratory study for detailed assessment of reinforced concrete structures.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:0760c637-d1f4-4d4d-aabd-27de21b9f132

► Uncertainties regarding structural safety of reinforced concrete structures may warrant a need for a detailed assessment. A detailed assessment using nonlinear finite element analysis is… (more)

▼ Uncertainties regarding structural safety of reinforced concrete structures may warrant a need for a detailed assessment. A detailed assessment using nonlinear finite element analysis is one of the alternatives which could help in decision-making about maintaining, upgrading or even demolishing and rebuilding of the structure. A reliable assessment should account for the existing damage in the structure, which may cause re-distribution of stresses within the structure, giving rise to unexpected failure modes. The existing approaches in nonlinear finite element analysis which account for the effect of already undergone damage in concrete, pose a number of limitations which either makes structural analysis ambitious or the uncertainty of concrete damage is not effectively accounted for. An alternative approach is adopted in this thesis, which is phenomenological and probabilistic in nature. Existing damage in concrete is conceived as a statistical field, which can be input into a finite element model, such that the existence of damage is taken as the starting point of the structural analysis. Focusing on indications of damage on the surface of concrete, i.e. crack patterns, an exploratory methodology based on image analysis is developed, to account for information obtained from crack pattern observation into nonlinear finite element analysis of reinforced concrete structures. The methodology is implemented on MATLAB and validated on damaged experimental specimens. Results of the computational analyses indicate good efficiency in predicting residual load carrying capacities and failure modes, alongside insightful numerical crack patterns. Through a critical examination of the obtained results and reflection upon the assumptions and simplification made in the methodology, recommendations for future research are provided. Advisors/Committee Members: Hendriks, Max (mentor), Rots, Jan (mentor), Slobbe, Arthur (mentor), Yang, Yuguang (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: finite element simulation; Crack pattern observation; reinforced concrete structures

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dhanmeher, S. (. (2017). Crack pattern observations to finite element simulation: An exploratory study for detailed assessment of reinforced concrete structures. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:0760c637-d1f4-4d4d-aabd-27de21b9f132

Chicago Manual of Style (16^th Edition):

Dhanmeher, Saurabh (author). “Crack pattern observations to finite element simulation: An exploratory study for detailed assessment of reinforced concrete structures.” 2017. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:0760c637-d1f4-4d4d-aabd-27de21b9f132.

MLA Handbook (7^th Edition):

Dhanmeher, Saurabh (author). “Crack pattern observations to finite element simulation: An exploratory study for detailed assessment of reinforced concrete structures.” 2017. Web. 17 Jan 2021.

Vancouver:

Dhanmeher S(. Crack pattern observations to finite element simulation: An exploratory study for detailed assessment of reinforced concrete structures. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:0760c637-d1f4-4d4d-aabd-27de21b9f132.

Council of Science Editors:

Dhanmeher S(. Crack pattern observations to finite element simulation: An exploratory study for detailed assessment of reinforced concrete structures. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:0760c637-d1f4-4d4d-aabd-27de21b9f132

Delft University of Technology

14. Maulizar, Audy (author). Comparison study of computational modeling approaches for calcium silicate elements masonry structures.

Degree: 2020, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:a297c47b-ceaf-4345-8ae5-db698777b2e5

► The increased seismicity due to the exploitation of natural gas in the Groningen region has put many residential buildings in the region at risk of… (more)

▼ The increased seismicity due to the exploitation of natural gas in the Groningen region has put many residential buildings in the region at risk of sustaining seismic induced damages. This has prompted many studies on the seismic behavior of the residential buildings, particularly the ones built from unreinforced masonry (URM). One experimental study has been conducted at TU Delft on a two-story CS element structure simulating a terraced house unit. Several numerical studies have also been carried out in the interest of assessing the viability of numerical models for engineering purposes. This research project will examine the viability of several modeling approaches for practical use in analyzing CS element structures. The assessment will be conducted by performing numerical analyses on several models and comparing the results from each analysis with the experimental results. The performance of each model is assessed in terms of hysteretic behavior, interstory drift, cracking patterns and failure mechanisms. Two modeling approaches will be considered in this research project, the continuum element-based macro-modeling approach and the block-based micro-modeling approach with each modeling approach having several variations with different constitutive models. Shell finite elements will be used for all numerical models. In addition to the numerical analyses on the numerical models, several additional analyses will also be conducted on the macro-models. A sensitivity study on the macro-models will be carried out to examine how changes in the considered material parameters affect the results of the numerical analyses on the macro-models. The effects of the inclusion of interface elements in the wall-pier connections of the macro-models will also be investigated in this report. All numerical analyses are carried out using the structural analysis software package DIANA 10.3. The constitutive elements considered for the numerical models will be limited to those already available in the software package. Advisors/Committee Members: Messali, Francesco (mentor), Rots, Jan (graduation committee), Ravenshorst, Geert (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Masonry; Numerical Analysis; CS Element; Total Strain Crack Model; engineering masonry model; Micro-model; Macro-model

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Maulizar, A. (. (2020). Comparison study of computational modeling approaches for calcium silicate elements masonry structures. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:a297c47b-ceaf-4345-8ae5-db698777b2e5

Chicago Manual of Style (16^th Edition):

Maulizar, Audy (author). “Comparison study of computational modeling approaches for calcium silicate elements masonry structures.” 2020. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:a297c47b-ceaf-4345-8ae5-db698777b2e5.

MLA Handbook (7^th Edition):

Maulizar, Audy (author). “Comparison study of computational modeling approaches for calcium silicate elements masonry structures.” 2020. Web. 17 Jan 2021.

Vancouver:

Maulizar A(. Comparison study of computational modeling approaches for calcium silicate elements masonry structures. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:a297c47b-ceaf-4345-8ae5-db698777b2e5.

Council of Science Editors:

Maulizar A(. Comparison study of computational modeling approaches for calcium silicate elements masonry structures. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:a297c47b-ceaf-4345-8ae5-db698777b2e5

Delft University of Technology

15. Bindiganavile Ramadas, Srinidhi (author). A Hyperbolic model for Degradation in Tension mode-I Fracture of Masonry: Implementation and Validation in Engineering masonry model.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:3c5dce16-f7c7-479f-80df-1bf141e0bf42

►

The growing need to understand the behaviour of un-reinforced masonry URM), subjected to repeated light man-made earthquakes caused by the extraction of gas in the… (more)

▼

The growing need to understand the behaviour of un-reinforced masonry URM), subjected to repeated light man-made earthquakes caused by the extraction of gas in the north-eastern part of The Netherlands has resulted in intense research to determine the exact process of crack initiation and propagation. The historical masonry buildings and Dutch terraced houses in Groningen are prone to light damages which become severe upon repeated lateral earthquake loading. Although there are material models that describe the behavior of modern brick masonry, they do not accurately represent the mechanical properties of 19th century clay brick masonry. This led to a large-scale research into the mechanical behavior of un-reinforced masonry and an orthotropic continuum macro-model called the Engineering Masonry Model (EMM) was proposed. The existing tension constitutive model in EMM assumes a secant unloading-reloading branch which does not consider the strength degradation of URM under repeated loading. Since tension mode-I fracture results in cracking of URM, it is important to study the effects of repeated loading on the propagation of the crack and its effects on the capacity of the structure. This thesis presents a degradation model to represent the strength deterioration of URM observed during repeated loading. The constitutive model formulated in this thesis is based on hyperbolic functions along with a secant slope for the unloading-reloading branch. To justify the model assumptions, a single linear 4-node element is analysed with the new model and the effect of varying different components of the constitutive equations is established. The window bank spandrel sample modeled as a 4-point bending test is analysed using the new model for 10, 30 and 100 repetitions. It is shown that the hyperbolic model can predict accurately the stress reduction within each repetition displacement set and also represent the crack width widening and crack propagation accurately when compared to the experimental results. The new model is tested on a wall with a window opening sample and the results closely matched that of the experiment. Finally, recommendations are provided for further development of the hyperbolic model and calibration of the material properties.

Civil Engineering

Advisors/Committee Members: Rots, Jan (mentor), Messali, Francesco (mentor), Korswagen Eguren, Paul (mentor), Kasbergen, Cor (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Unreinforce masonry structures; Degradation; engineering masonry model; DIANA; FEM modelling; Tension mode-I

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bindiganavile Ramadas, S. (. (2018). A Hyperbolic model for Degradation in Tension mode-I Fracture of Masonry: Implementation and Validation in Engineering masonry model. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:3c5dce16-f7c7-479f-80df-1bf141e0bf42

Chicago Manual of Style (16^th Edition):

Bindiganavile Ramadas, Srinidhi (author). “A Hyperbolic model for Degradation in Tension mode-I Fracture of Masonry: Implementation and Validation in Engineering masonry model.” 2018. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:3c5dce16-f7c7-479f-80df-1bf141e0bf42.

MLA Handbook (7^th Edition):

Bindiganavile Ramadas, Srinidhi (author). “A Hyperbolic model for Degradation in Tension mode-I Fracture of Masonry: Implementation and Validation in Engineering masonry model.” 2018. Web. 17 Jan 2021.

Vancouver:

Bindiganavile Ramadas S(. A Hyperbolic model for Degradation in Tension mode-I Fracture of Masonry: Implementation and Validation in Engineering masonry model. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:3c5dce16-f7c7-479f-80df-1bf141e0bf42.

Council of Science Editors:

Bindiganavile Ramadas S(. A Hyperbolic model for Degradation in Tension mode-I Fracture of Masonry: Implementation and Validation in Engineering masonry model. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:3c5dce16-f7c7-479f-80df-1bf141e0bf42

Delft University of Technology

16. Mussche, Henk (author). Development of a Reliable and Efficient 3D Calculation Model of a High-Rise Building Under Seismic Loading.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:903db796-7f25-4ce3-b5ce-c92fd207c883

►

This thesis research focusses on the development of a reliable and efficient 3D calculation model of an existing high-rise, reinforced concrete building in the Groningen… (more)

Subjects/Keywords: Seismic; Abaqus; 3D Model; Reliable; Efficient; 1D Model; Simulia; Matlab; Groningen; Response; Response Spectrum; Accelerogram; NPR; Near Collapse; Seismic loading; Modal Response Spectrum Analysis; Verification; Base Shear; Existing; High-Rise; Reinforced Concrete; Earthquake; Earthquake analysis; Human induced; Gas extraction; dynamic behaviour; strengthening; strengthening measures; Zonneveld ingenieurs; TU Delft; Harm Hoorn; Jan Rots; Max Hendriks; NPR9998; Eurocode 8; Concrete Damaged Plasticity; NLTH; NLTH Analysis; Euler Bernoulli; Plastic analysis; Non-linear; Awesome; Optimisation; Finite Element Method; FEM; Analysis; Henk Mussche

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mussche, H. (. (2018). Development of a Reliable and Efficient 3D Calculation Model of a High-Rise Building Under Seismic Loading. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:903db796-7f25-4ce3-b5ce-c92fd207c883

Chicago Manual of Style (16^th Edition):

Mussche, Henk (author). “Development of a Reliable and Efficient 3D Calculation Model of a High-Rise Building Under Seismic Loading.” 2018. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:903db796-7f25-4ce3-b5ce-c92fd207c883.

MLA Handbook (7^th Edition):

Mussche, Henk (author). “Development of a Reliable and Efficient 3D Calculation Model of a High-Rise Building Under Seismic Loading.” 2018. Web. 17 Jan 2021.

Vancouver:

Mussche H(. Development of a Reliable and Efficient 3D Calculation Model of a High-Rise Building Under Seismic Loading. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:903db796-7f25-4ce3-b5ce-c92fd207c883.

Council of Science Editors:

Mussche H(. Development of a Reliable and Efficient 3D Calculation Model of a High-Rise Building Under Seismic Loading. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:903db796-7f25-4ce3-b5ce-c92fd207c883

Delft University of Technology

17. Xu, Tianqi (author). Modeling the seismic response of a two-storey calcium silicate brick masonry structure with nonlinear pushover and time-history analyses.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:dcc97b15-0b76-4b90-8a22-a86f23cffe3c

► In the recent years, increasing induced seismic activities have been observed in the northern part of the Netherlands due to gas extraction. These seismic events… (more)

▼ In the recent years, increasing induced seismic activities have been observed in the northern part of the Netherlands due to gas extraction. These seismic events may cause severe damages to the building stock in this area, which is mainly composed of unreinforced masonry (URM) buildings not designed to withstand seismic loads. An extensive experimental campaign has been carried out at the Stevin II laboratory of Delft University of Technology to characterize the seismic responses of these URM structures. In this framework, a quasi-static cyclic pushover test on a full-scale masonry assemblage has been performed. In this treatise, the seismic behavior of the tested masonry assemblage is modeled and analyzed via finite element analyses. The validation against the experimental results is achieved through nonlinear pushover analyses on a well-built model of the assemblage. Moreover, as the pushover method used in the aforementioned studies is based on static loading, its accuracy and applicability on studying the seismic behavior for this type of masonry structure need to be evaluated. The evaluation is achieved by performing a series of nonlinear time-history analyses on the model to obtain accurate seismic response of the structure. The applied horizontal ground motion is representative of the earthquakes in the Groningen province and the incremental dynamic analysis method (IDA) is employed. The nonlinear pushover analyses reproduce the test results properly, showing similar maximum base shear forces and asymmetric capacity curves. In both experimental and numerical analyses, cracks start to form at the top and bottom of the masonry piers due to rocking mechanism and the failure of the structure is governed by damages of the wide piers. Moreover, a sensitivity study based on the monotonic pushover analysis shows that the post-peak behavior of the model is directly related to the masonry compressive strength. The incremental dynamic analysis provides similar base shear capacity and failure mechanisms as the nonlinear pushover analysis. However, the maximum displacement is smaller in both loading directions and a more distributed crack pattern is observed. Overall, for the studied masonry house, the pushover method is capable of properly estimating the base shear capacity but the deformation capacity might be overestimated. Advisors/Committee Members: Rots, Jan (mentor), Messali, Francesco (mentor), Ravenshorst, Geert (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: unreinforced masonry; seismic response; nonlinear pushover analysis; nonlinear time-history analysis

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Xu, T. (. (2018). Modeling the seismic response of a two-storey calcium silicate brick masonry structure with nonlinear pushover and time-history analyses. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:dcc97b15-0b76-4b90-8a22-a86f23cffe3c

Chicago Manual of Style (16^th Edition):

Xu, Tianqi (author). “Modeling the seismic response of a two-storey calcium silicate brick masonry structure with nonlinear pushover and time-history analyses.” 2018. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:dcc97b15-0b76-4b90-8a22-a86f23cffe3c.

MLA Handbook (7^th Edition):

Xu, Tianqi (author). “Modeling the seismic response of a two-storey calcium silicate brick masonry structure with nonlinear pushover and time-history analyses.” 2018. Web. 17 Jan 2021.

Vancouver:

Xu T(. Modeling the seismic response of a two-storey calcium silicate brick masonry structure with nonlinear pushover and time-history analyses. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:dcc97b15-0b76-4b90-8a22-a86f23cffe3c.

Council of Science Editors:

Xu T(. Modeling the seismic response of a two-storey calcium silicate brick masonry structure with nonlinear pushover and time-history analyses. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:dcc97b15-0b76-4b90-8a22-a86f23cffe3c

Delft University of Technology

18. Ferket, Max (author). Sequentially linear analysis with equivalent frame method to simulate unreinforced masonry structures.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:9ecdea11-ef2d-4fd0-910c-a2442ff5705a

►

This research investigates how the equivalent frame method in combination with a sequentially linear analysis can be used to model the behaviour of a façade… (more)

▼

This research investigates how the equivalent frame method in combination with a sequentially linear analysis can be used to model the behaviour of a façade of an unreinforced masonry structure, subjected to a lateral pushover load. The experimental data of the two-story building experiment at the University of Pavia is used. Two different types of models are made, a continuum model and a beam model, with each two different modeling approaches, the three-zoned approach for the piers and spandrels and a uniform model. The three-zoned approach uses the bed joint tensile strength at the ends of the piers and spandrels, and the maximum tensile strength at the center of those element to simulate rocking and shear failure respectively. The most important results are: The three-zoned approach in combination with a continuum model was able to describe the failure mechanism of the façade and perform the analysis stable, with a maximum tensile strength adjusted to f_tu=0.08 MPa. Shear failure in the piers was dominant. As a lateral push-over load was used and not a cyclic load as in the experiment, the maximum load of the structure was for most displacements somewhat higher than in the experiment, but the maximum load was 150 kN in both cases. The displacement of 22 mm in the experiment was not reached, but a displacement of 10 mm. The beam model analysis aborted early as a result of a reduction of the initial load factor. It was found that the fixed crack approach in combination with high shear forces in the structure resulted in a fixed crack coordinate system that was rotated from the beam axis. Principal stresses could exceed the strength of the material and wrong integration points were damaged reducing their strength severely. At this stage a maximum displacement of 5 mm is reached while the force is 165 kN, higher than in the experiment. The structure responds very brittle. Shear stresses in the beam element model exceeded the strength of the material. Adding shear interfaces in an SLA will result in a more correct failure pattern. For the beam model, a sensitivity check was done for the mesh size, fracture energy, number of saw-teeth and number of integration points. All values were accurate enough. A relation exists between an initial load factor reduction and the opening of a crack in the corresponding integration point that damages at an initial load factor reduction. In conclusion, the results of this thesis confirm the potential of the SLA to accurately approximate the behaviour of an URM structure as it was possible to run a stable analysis with accurate results for the continuum model. The beam model gave similar results in terms of forces and bending moments compared with an incremental iterative approach, but the analysis was aborted early. New developments like a rotating crack approach and shear interfaces will result in a more stable analysis as the right failure behaviour will be followed resulting in a more accurate load-displacement relation.

Structural…

Advisors/Committee Members: Pari, Manimaran (mentor), Hendriks, Max (graduation committee), Ravenshorst, Geert (graduation committee), Rots, Jan (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: SLA; Sequentially linear analysis; Equivalent frame method; Pavia experiment; Earthquake analsyis; Unreinforce masonry structures; URM; Finite Element Analysis; FEA

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ferket, M. (. (2018). Sequentially linear analysis with equivalent frame method to simulate unreinforced masonry structures. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:9ecdea11-ef2d-4fd0-910c-a2442ff5705a

Chicago Manual of Style (16^th Edition):

Ferket, Max (author). “Sequentially linear analysis with equivalent frame method to simulate unreinforced masonry structures.” 2018. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:9ecdea11-ef2d-4fd0-910c-a2442ff5705a.

MLA Handbook (7^th Edition):

Ferket, Max (author). “Sequentially linear analysis with equivalent frame method to simulate unreinforced masonry structures.” 2018. Web. 17 Jan 2021.

Vancouver:

Ferket M(. Sequentially linear analysis with equivalent frame method to simulate unreinforced masonry structures. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:9ecdea11-ef2d-4fd0-910c-a2442ff5705a.

Council of Science Editors:

Ferket M(. Sequentially linear analysis with equivalent frame method to simulate unreinforced masonry structures. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:9ecdea11-ef2d-4fd0-910c-a2442ff5705a

Delft University of Technology

19. Kadaba Srinivasan, Adarsha (author). Seismic assessment of a detached masonry building using non-linear analyses.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:af7280f0-f4a7-4f5e-a2cb-d3e0abdc58b2

► Masonry is one of the oldest and popular building materials used world over. The constituent materials are readily available and hence are cheap in most… (more)

▼ Masonry is one of the oldest and popular building materials used world over. The constituent materials are readily available and hence are cheap in most areas. So it serves as an economically viable building material. Though, its load bearing capacity under compression is high, it does not perform well under tensile forces, cyclic and lateral loads. In the Netherlands, specifically around the Groningen area, where natural gas is being extracted from the 1960s, masonry structures are currently prone to artificial seismic excitation due to excessive gas extraction and the resulting soil liquefaction. Such residential buildings having stood there for about a 100 years are being affected by these seismic vibrations and have developed cracks which can prove detrimental to both life and property if unchecked. To this end, Nederlandse Aardolie Matschappij (NAM) has spearheaded a research group along with TUDelft, ARUP and others to get a thorough insight into the strength and durability aspects of these existing buildings. Since there are different configurations and types of structures, it has been divided into several typologies. Further research, using shake table tests, has also been taken up at the TUDelft Stevin lab using these different typologies and/or scaled models. This project deals with the study of type T3a detached type villa, which is asymmetric in plan. This structure consists of clay brick masonry walls and timber floors and beams. Effectively, the current thesis project is a blind prediction on the strength and behaviour aspects of this particular structure. For the same, the structure is modelled and analysed using Finite Element application DIANA 9.6. Firstly, modelling of the structure is done according to macro-modelling technique with smeared cracking. Shell elements are used for walls and floors, and beam elements for timber beams. It is noted here that all the non-linearities have been focused only on the masonry part. Linear static checks and Eigenvalue checks are carried out. The time-history record was provided by the supervisor. Variational studies were performed on the structure to check their influence on the seismic resistance. These variations are - model without roof and with the roof part, the latter modelled under fair assumptions. Different type of beam end connections, seismic excitation along different directions of the structure were also included. Finally, as a check, monotonic mass-proportional pushover analyses were conducted. The results show that the given input signal at 0.16g scaling is not able to inflict serious damage, hence higher scaling is used. It is observed that the seismic resistance of the structure is higher along the X-direction of the structure than in Y-direction. Influence of beam ends on the seismic resistance is not significant. However, coupling between floors has been observed, by comparing their displacements at multiple time instants. The presence of roof part has a significant influence on the (box) behaviour of the structure, due to increase in… Advisors/Committee Members: Rots, Jan (mentor), Hendriks, Max (mentor), Hoogenboom, Pierre (mentor), Ravenshorst, Geert (mentor), Mariani, Valentina (mentor), Delft University of Technology (degree granting institution).

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kadaba Srinivasan, A. (. (2017). Seismic assessment of a detached masonry building using non-linear analyses. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:af7280f0-f4a7-4f5e-a2cb-d3e0abdc58b2

Chicago Manual of Style (16^th Edition):

Kadaba Srinivasan, Adarsha (author). “Seismic assessment of a detached masonry building using non-linear analyses.” 2017. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:af7280f0-f4a7-4f5e-a2cb-d3e0abdc58b2.

MLA Handbook (7^th Edition):

Kadaba Srinivasan, Adarsha (author). “Seismic assessment of a detached masonry building using non-linear analyses.” 2017. Web. 17 Jan 2021.

Vancouver:

Kadaba Srinivasan A(. Seismic assessment of a detached masonry building using non-linear analyses. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:af7280f0-f4a7-4f5e-a2cb-d3e0abdc58b2.

Council of Science Editors:

Kadaba Srinivasan A(. Seismic assessment of a detached masonry building using non-linear analyses. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:af7280f0-f4a7-4f5e-a2cb-d3e0abdc58b2

Delft University of Technology

20. Galanakis, Nikos (author). Determination of the displacement demand for the out-of-plane seismic response of unreinforced masonry walls for the Groningen Case.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:47f04627-fdd4-443d-b4c6-c913c8730aac

► This research describes the demand of a Displacement-based approach for the assessment of out-of plane behaviour of one-way vertically-spanning unreinforced masonry (URM) walls of terraced… (more)

▼ This research describes the demand of a Displacement-based approach for the assessment of out-of plane behaviour of one-way vertically-spanning unreinforced masonry (URM) walls of terraced and detached houses in the Groningen Province. One of the most vulnerable components of a typical Dutch unreinforced masonry building subjected to earthquake excitation is the face-loaded walls. As the Dutch masonry walls are quite slender, this matter is of significant importance. Up to now, codes and standards evaluate the structural integrity of unreinforced masonry face-loaded walls with either force-based or displacement-based approaches. The latter present beneficial advantages, since the rocking mechanism of an out-of-plane wall is considered to be an instability problem. Particularly, for the definition of the demand (in terms of mid-height displacement for an out-of-plane unreinforced masonry wall) for the Groningen Case, it will be based on the design response outlined in New Zealand Society for Earthquake Engineering Standard (NZSEE) for the Seismic Assessment of Unreinforced Masonry Buildings. Nonetheless, a new rendition of the Shape Factor Coefficient Ci(Tp) and Height Coefficient CHi is necessary, in order to relate the design response with the genuine characteristics of Groningen seismicity. The Shape Factor or Part Coefficient indicates the interaction between the seismic responses of the structural parts and the building, while the Height Coefficient indicates the amplification of the peak ground accelaration through the height of building. The procedure towards the description of the out-of-plane seismic demand is analysed by three parts. In the first part, a series of Nonlinear Time History (NLTH) analyses are performed in single degree of freedom (SDOF) systems. In total, seven SDOF systems are modelled in Opensees. Each of them represents the equivalent SDOF system, according to Eurocode 8, of the considered structures for this research. The SDOF system characteristics as well as the ground motion records for five areas in the Groningen Province are provided from in-house studies of BAM Advies en Engineering. The ground motion records are related to the Draft NPR 9998:2017. Furthermore, two hysteresis rules for the structures are included in the Opensees Models. Hysteretic Rule 1 accounts for low-to-moderate energy dissipation, while Hysteretic Rule 2 for moderate energy dissipation. The hysteretic rules are in accordance with hysteretic behaviour of URM piers under in-plane loading. The geometry, loading conditions and mechanical properties of the piers are chosen to represent the piers in typical Dutch terraced and detached houses. These piers were tested at the Stevin Laboratory of the Delft University of Technology, which provided the data of the tests. Two specific in-plane wall specimens (COMP-2 and COMP-3) are used in this work. The Opensees parameters describing the aforementioned hysteretic rules, are calibrated according to the cyclic tests of these specimens. Next, the NLTH analyses are performed.… Advisors/Committee Members: Rots, Jan (mentor), Messali, Francesco (mentor), Ravenshorst, Geert (mentor), Spanenburg, Mark (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: out-of-plane; URM walls; seismic; Floor Response Spectra; Height Coefficient; Shape Factor Coefficient; NPR; NZSEE; rocking mechanism; Opensees; Groningen earthquakes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Galanakis, N. (. (2019). Determination of the displacement demand for the out-of-plane seismic response of unreinforced masonry walls for the Groningen Case. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:47f04627-fdd4-443d-b4c6-c913c8730aac

Chicago Manual of Style (16^th Edition):

Galanakis, Nikos (author). “Determination of the displacement demand for the out-of-plane seismic response of unreinforced masonry walls for the Groningen Case.” 2019. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:47f04627-fdd4-443d-b4c6-c913c8730aac.

MLA Handbook (7^th Edition):

Galanakis, Nikos (author). “Determination of the displacement demand for the out-of-plane seismic response of unreinforced masonry walls for the Groningen Case.” 2019. Web. 17 Jan 2021.

Vancouver:

Galanakis N(. Determination of the displacement demand for the out-of-plane seismic response of unreinforced masonry walls for the Groningen Case. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:47f04627-fdd4-443d-b4c6-c913c8730aac.

Council of Science Editors:

Galanakis N(. Determination of the displacement demand for the out-of-plane seismic response of unreinforced masonry walls for the Groningen Case. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:47f04627-fdd4-443d-b4c6-c913c8730aac

Delft University of Technology

21. van der Zanden, Marloes (author). Assessment of the seismic performance and sustainability of the Kath-Kuni building style in the Indian Himalaya.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:6eeaa0c7-8d00-4a8e-ae80-79f6abf050bc

► Increasing disasters, due to urbanism in combination with the high probability of earthquakes in the Western Indian Himalayas, are impacting the well-being of local communities.… (more)

▼ Increasing disasters, due to urbanism in combination with the high probability of earthquakes in the Western Indian Himalayas, are impacting the well-being of local communities. The vernacular Kath-Kuni (also called: ‘cator-and-cribbage’ or ‘timber laced masonry’) architecture is a centuries-old building method spread over the Himalayas and the Karakoram mountain range in India, Pakistan and parts of Afghanistan and China. This building typology’s efficacy was proved by its ability to withstand significant seismic events in the region and is, hence, well-known to be an earthquake resistant building style. To ensure that the valuable building techniques embedded in the traditional Kath-Kuni architecture do not get lost completely, the main question asked in this research is: “Which earthquake resistant features and embedded traditional knowledge of Kath-Kuni walls are essential in generating adequate seismic performance of this vernacular architecture?” To this end, field research, out-of-plane and in-plane analysis of walls, laboratory testing to characterise the walls ductility, analysis of the building’s box-action and a sustainability study comparing Kath-Kuni with concrete buildings have been carried out. This led to the conclusion that the horizontal spanning timber beams and the robust connection in the corners are generating box-action by transferring the lateral force from the out-of-plane loaded wall to the in-plane loaded walls. Thus, the seismic capacity of the building is not depending on the rigidity of the floor diaphragms. Secondly, the in-plane loaded walls use a behaviour factor R to take non-linear wall behaviour (ductility) into account. Research to this behaviour factor is and the time period of the building indicates that the behaviour factor and time period obtained from standard formulas are too conservative. Last, the most important earthquake resistant features that contribute to the high ductility of the in-plane loaded walls are the timber connections (kadil dowel connection and maanwi dovetail connection) which are allowing internal rotation in the layer and are acting in parallel and series with one another, the lack of vertical reinforcement which leaves the wall free to deform in vertical direction without damage and the high contribution of friction in between the stone and stone-timber in the wall. In addition to the seismic resistance of the Kath-Kuni building style, study showed that this architecture scores well on sustainability, in terms of performance, service life and environmental impact. However, high construction costs, due to a scarcity of the main materials, has rendered building of Kath-Kuni houses economically currently unviable. Therefore, it is recommended to investigate possibilities in modernising and re-interpreting the Kath-Kuni building style using other sustainable and affordable materials, such as bamboo, stabilized earthen blocks or lime concrete. Even though earthquake resistant construction is also feasible using… Advisors/Committee Members: Ravenshorst, Geert (mentor), Chikermane, Sanjay (mentor), Rots, Jan (mentor), Jonkers, Henk (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Kath-Kuni; Vernacular architecture; Earthquake analsyis; Seismic engineering; Himalaya; India; Experimental study

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

van der Zanden, M. (. (2018). Assessment of the seismic performance and sustainability of the Kath-Kuni building style in the Indian Himalaya. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:6eeaa0c7-8d00-4a8e-ae80-79f6abf050bc

Chicago Manual of Style (16^th Edition):

van der Zanden, Marloes (author). “Assessment of the seismic performance and sustainability of the Kath-Kuni building style in the Indian Himalaya.” 2018. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:6eeaa0c7-8d00-4a8e-ae80-79f6abf050bc.

MLA Handbook (7^th Edition):

van der Zanden, Marloes (author). “Assessment of the seismic performance and sustainability of the Kath-Kuni building style in the Indian Himalaya.” 2018. Web. 17 Jan 2021.

Vancouver:

van der Zanden M(. Assessment of the seismic performance and sustainability of the Kath-Kuni building style in the Indian Himalaya. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:6eeaa0c7-8d00-4a8e-ae80-79f6abf050bc.

Council of Science Editors:

van der Zanden M(. Assessment of the seismic performance and sustainability of the Kath-Kuni building style in the Indian Himalaya. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:6eeaa0c7-8d00-4a8e-ae80-79f6abf050bc

Delft University of Technology

22. Hendriks, Cas (author). A Conceptual Integrated Parametric Design Tool for Excavation Sites.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:7e8c8b7a-12e9-42c3-908e-0ca476cbb236

► Building Information Modelling (BIM) technologies are changing the conventional structural design process. BIM level-1 and level-2 are providing guidelines and frameworks for standardization with the… (more)

▼ Building Information Modelling (BIM) technologies are changing the conventional structural design process. BIM level-1 and level-2 are providing guidelines and frameworks for standardization with the standard Industry Foundation Classes (IFC) and collaborative design respectively. However, the predicted full potential of BIM, BIM level-3, which is a smart design system, is still in its infancy stage. Many studies focus on single technologies that BIM envelopes and do not grasp the benefit of incorporating all technologies into one model. Additionally, the industry is lagging in the adaptation of BIM technologies, since, as of today, only one company in the world is BIM level-2 certified. Witteveen+Bos recognises the potential of smart systems and is developing many innovative software solutions. In this thesis, as the objective stated, a conceptual partly BIM level-3 excavation site design tool has been developed. The developed tool, integrates parametric design with Plaxis, GIS and RockWorks. The developed tool helps stakeholders to visually explore many design solutions in a short amount of time, based on the costs, MKI, structural- and environmental requirements and the characteristics of the surroundings. The name SET (Smart Engineering Tool) was given to this tool. Three essential boundary conditions are distinguished for the design of an excavation pit. Soil Layers, groundwater levels and the surrounding buildings. These boundary conditions impose loads and requirements on the excavation pit. The way the groundwater can be kept out determines mostly the costs. For this reason, SET works-out designs with a natural impermeable clay layer, an artificial underwater concrete floor or an artificial impermeable gel layer. Additionally, designs with different retaining walls and grout anchors or struts are worked-out. The design of an excavation pit must meet structural and environmental requirements. A vertical, horizontal and moment equilibrium must hold in the excavation pit. In urban areas, the most important concern is avoiding inadmissible damage or hindrance to adjacent structures, because the surrounding buildings are owned by third parties and deformations, causing damage to these buildings, happen quick. For this reason, the design of the excavation pit must meet the settlement requirements of the surrounding buildings. For each design, “Economisch Meest Voordelige Inschrijving” (EMVI) (Economically Most Attractive Tender) scores are used to quantify each design on durability, the impact on the surroundings, hindrance and risk. EMVI in combination with the cost estimates is used to find the design with the best cost to quality ratio. Rijkswaterstaat has determined a “Milieu Kosten Indicator” (MKI) (Environmental Cost Indicator) value for each building material. In this thesis, this value is used to quantify the environmental impact of a design An analysis was made on the capabilities that a design tool should have. A literature study was performed on the BIM technologies. From this analysis… Advisors/Committee Members: Rots, Jan (graduation committee), Hendriks, J.W.C. (mentor), van Nederveen, Sander (graduation committee), Voorendt, Mark (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: BIM; Parametric design; Interoperability; Standardization; Algorithmic design; Collaborative design; BIM level 3; excavation pits; Design tool; smart decision tool; Plaxis 2D

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hendriks, C. (. (2018). A Conceptual Integrated Parametric Design Tool for Excavation Sites. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:7e8c8b7a-12e9-42c3-908e-0ca476cbb236

Chicago Manual of Style (16^th Edition):

Hendriks, Cas (author). “A Conceptual Integrated Parametric Design Tool for Excavation Sites.” 2018. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:7e8c8b7a-12e9-42c3-908e-0ca476cbb236.

MLA Handbook (7^th Edition):

Hendriks, Cas (author). “A Conceptual Integrated Parametric Design Tool for Excavation Sites.” 2018. Web. 17 Jan 2021.

Vancouver:

Hendriks C(. A Conceptual Integrated Parametric Design Tool for Excavation Sites. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:7e8c8b7a-12e9-42c3-908e-0ca476cbb236.

Council of Science Editors:

Hendriks C(. A Conceptual Integrated Parametric Design Tool for Excavation Sites. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:7e8c8b7a-12e9-42c3-908e-0ca476cbb236

Delft University of Technology

23. nobel, willem (author). A fibre flexure: Lumped shear model for masonry structures.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:f2b6fcde-b2d6-4c8d-96bc-26cfc45d7e56

► Existing sophisticated numerical micro- and macro models have already proven to be capable of simulating typical masonry behaviour. However, assessing the global response of masonry… (more)

▼ Existing sophisticated numerical micro- and macro models have already proven to be capable of simulating typical masonry behaviour. However, assessing the global response of masonry buildings using brick-to-brick micro modelling or even simplified macro modelling, in which masonry is regarded as a continuum material, takes such an amount of time that these methods cannot be considered as cost-effective. For the last two decades it has been recognized that, for the global structural behaviour of masonry buildings, simplifications have to be made. The idealization of a masonry wall as an assemblage of numerically integrated (or fibre) beam elements could considerably reduce the computational burden and therefore this study addresses the following research question: To what extent are numerically integrated beam elements applicable for assessing the global response of masonry structures? Whereas existing equivalent frame methods are usually based on lumped plasticity models, the approach discussed here considers the entire member (e.g pier or spandrel) as an inelastic element in which the sectional response is evaluated via a fibre discretization in which each fibre (or integration point over the depth) may follow a material uniaxial nonlinear stress-strain relation. Initially the shear response is kept linear, automatically idealizing the structural response as purely flexural. The proposed model will be hereinafter named FFM (Fibre Flexure Model). Additionally, an extension of the FFM has been proposed, describing the shearing behaviour by means of a structural nodal interface element. Adopting the nodal interface element, placed between two nodes of adjacent beam elements, the axial and bending behaviour is described with the fibre-section discretization and the shear behaviour is modelled via an equivalent Coulomb-type criterion describing the shear force limit. The proposed model will be hereinafter named FF-LSM (Fibre Flexure – Lumped Shear model) because it lumps shearing nonlinearities in one single interface element located in the centre of the structural component, whereas flexural and crushing behaviour is evaluated via smeared crack beam elements. To validate the numerical models, two different types of benchmarks have been investigated, respectively representing the behaviour of either a single structural component (masonry pier) or a composite façade. All numerical models have been subjected to static nonlinear (pushover) analyses and results have been compared with experimental and numerical data through the use of a reference continuum model. First, it has been demonstrated that the FFM, idealizing the structural response as purely flexural, is capable of simulating the rocking failure mode of unreinforced masonry walls, whereas it fails to simulate typical masonry shearing modes such as diagonal cracking and sliding. The use of the model for squat members that are characterized by shear failure leads to significant overpredictions, making the model not applicable for the analysis of… Advisors/Committee Members: Messali, Francesco (mentor), Rots, Jan (mentor), Ravenshorst, Geert (mentor), Hendriks, M.A.N. (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: fibre beam; numerically integrated beam; fibre discretization; nodal interface element; distributed plasticity; lumped plasticity; equivalent frame

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

nobel, w. (. (2017). A fibre flexure: Lumped shear model for masonry structures. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:f2b6fcde-b2d6-4c8d-96bc-26cfc45d7e56

Chicago Manual of Style (16^th Edition):

nobel, willem (author). “A fibre flexure: Lumped shear model for masonry structures.” 2017. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:f2b6fcde-b2d6-4c8d-96bc-26cfc45d7e56.

MLA Handbook (7^th Edition):

nobel, willem (author). “A fibre flexure: Lumped shear model for masonry structures.” 2017. Web. 17 Jan 2021.

Vancouver:

nobel w(. A fibre flexure: Lumped shear model for masonry structures. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:f2b6fcde-b2d6-4c8d-96bc-26cfc45d7e56.

Council of Science Editors:

nobel w(. A fibre flexure: Lumped shear model for masonry structures. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:f2b6fcde-b2d6-4c8d-96bc-26cfc45d7e56

Delft University of Technology

24. de Groot, Arthur (author). Structural Window Design for In-plane Seismic Strengthening: Numerical Predictions of Strengthening Unreinforced Masonry Structures in Groningen.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:c87367bf-54ae-4bdb-898f-5bf9c7555c55

►

In recent decades, gas production has caused numerous human-induced shallow earthquakes in the province of Groningen, The Netherlands. The buildings in this area were not… (more)

▼

In recent decades, gas production has caused numerous human-induced shallow earthquakes in the province of Groningen, The Netherlands. The buildings in this area were not designed for these unexpected earthquake loads and have shown to be vulnerable. However, current strengthening measures are considered to be time-consuming, expensive, and a great hindrance to the residents. Consequently, the question rises whether unconventional strengthening measures can offer relatively simple and quick-to-implement alternatives. This thesis researches if replacing existing windows by structural windows could provide an effective strengthening alternative. The structural window design aims to increase the in-plane seismic force capacity of an existing masonry structure by utilising the glass pane as a structural element. The structural window is designed to be composed of a timber frame, a semi-rigid adhesive, and a double glazing unit. The structural layer of the double glazing unit has a thickness of 20mm and is composed of two laminated annealed glass panes with equal thickness. The potential of the structural window is investigated in various numerical studies, using DIANA FEA 10.2. The numerical studies are split into validation studies and seismic strengthening predictions. In the validation studies, results from numerical models are compared to and validated against experimental results reported in literature. Subsequently, the potential of the structural window is assessed by seismic strengthening predictions that combine and extrapolate the validation studies. A mass proportional one-directional monotonic pushover loading scheme is adopted. The seismic strengthening predictions address masonry walls and one type of terraced house (Dutch: “Rijtjeshuis") with two rigid floors, masonry spandrels, and two large windows in the front façade wall. The numerical strengthening predictions of the masonry walls and the terraced house indicate that a structural window improves the in-plane seismic performance significantly. It is found that strengthening not only greatly increases the seismic force capacity, but also reduces the expected damage. For example, the strengthened terraced house with openable window sections reaches 205% of the seismic force capacity of the unstrengthened terraced house. Furthermore, it is found that the stress levels in the glass pane are expected to remain well below the stress levels at the onset of glass cracking. The numerical strengthening predictions are promising. Therefore, it is recommended to validate these numerical predictions with an experimental testing campaign.

Civil Engineering | Building Engineering

Advisors/Committee Members: Nijsse, Rob (mentor), Rots, Jan (mentor), Schipper, Roel (mentor), Korswagen Eguren, Paul (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Groningen earthquakes; Terraced house; Unreinforced masonry structures; in-plane strengthening; timber-glass composite wall; structural window design; structural adhesive; Structural glass; Numerical modelling; Pushover analysis; monotonic load; seismic performance; Damage Limitation; Near Collapse

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

de Groot, A. (. (2019). Structural Window Design for In-plane Seismic Strengthening: Numerical Predictions of Strengthening Unreinforced Masonry Structures in Groningen. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:c87367bf-54ae-4bdb-898f-5bf9c7555c55

Chicago Manual of Style (16^th Edition):

de Groot, Arthur (author). “Structural Window Design for In-plane Seismic Strengthening: Numerical Predictions of Strengthening Unreinforced Masonry Structures in Groningen.” 2019. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:c87367bf-54ae-4bdb-898f-5bf9c7555c55.

MLA Handbook (7^th Edition):

de Groot, Arthur (author). “Structural Window Design for In-plane Seismic Strengthening: Numerical Predictions of Strengthening Unreinforced Masonry Structures in Groningen.” 2019. Web. 17 Jan 2021.

Vancouver:

de Groot A(. Structural Window Design for In-plane Seismic Strengthening: Numerical Predictions of Strengthening Unreinforced Masonry Structures in Groningen. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:c87367bf-54ae-4bdb-898f-5bf9c7555c55.

Council of Science Editors:

de Groot A(. Structural Window Design for In-plane Seismic Strengthening: Numerical Predictions of Strengthening Unreinforced Masonry Structures in Groningen. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:c87367bf-54ae-4bdb-898f-5bf9c7555c55

Delft University of Technology

25. Soni, Mohit (author). Behaviour of two-way spanning walls subjected to out-of-plane loading by numerical analysis.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:e38f8648-a1cd-4db4-8489-a8c82f4b7b75

► Unreinforced masonry (URM) buildings are vulnerable when subjected to out-of-plane dynamic loading, especially under as earthquakes. Within the masonry building, the wall spanning in the… (more)

▼ Unreinforced masonry (URM) buildings are vulnerable when subjected to out-of-plane dynamic loading, especially under as earthquakes. Within the masonry building, the wall spanning in the direction perpendicular to the seismic loading is the most critical component. Damage to these walls (out-of-plane failure) frequently leads to the partial or global collapse in the URM building structures, especially if the wall is a load-bearing wall. Boundary conditions and overburden load drastically influence the response of out-of-plane loaded walls. Two-way spanning walls that are restrained on three or four sides show a larger force capacity compares to one-way spanning walls, which are only restrained at top and bottom. Nevertheless, the studies on the behavior of two-way spanning walls are limited. This thesis aims to understand the two-way bending behavior of unreinforced masonry walls subjected to out-of-plane loading employing numerical analysis. A three-dimensional model using a shell element is adopted. Cracking is modeled with a continuum damage approach by comparing the isotropic model, namely the rotating smeared cracking approach (TSRC), and an orthotropic model, namely the engineering masonry model (EMM). The effect of the top boundary condition on the response of the two-way spanning walls is examined by considering case studies: four sides restrained wall with overburden load, and three sides restrained wall without overburden load. Both the walls are vertically connected with the pier (or return wall) with an alternate row of headers providing full moment restraint. The description concerning the seismic behavior of the two-way spanning wall made based upon the analysis carried out incorporating different loadings types like the uniform, mode proportional loading, time history, and cyclic loading. The orthotropic material model is better in evaluating the response of the two-way spanning wall as compared to the isotropic material model if the proper support condition is specified. The difference in response using either material model is visible at the onset of cracking. The response of the two-way spanning wall under monotonic increasing load using EMM demonstrates walls have a displacement capacity to sustaining a relatively constant load, whereas the TSRC fails to capture this behavior. Due to high non-linearity because of cracking in the elements, the solution becomes non-convergent, and a solid statement regarding the ultimate displacement capacity of the wall can not be made. However, based on the results from static analysis using EMM, a two-way spanning wall have sufficient displacement capacity well over the wall thickness. The displacement capacity signifies the wall can deform in the out-of-plane direction without failure and is beneficial, especially during an earthquake event. In two-way spanning walls, both the peak load and initial stiffness of the walls is enhanced by higher pre-compression and top lateral support. It is found both experimentally and numerically, as precompression increases… Advisors/Committee Members: Rots, Jan (mentor), Esposito, Rita (mentor), van Dalen, Karel (graduation committee), Ravenshorst, Geert (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Unreinforced masonry wall; Out-of-plane behaviour; Numerical Analysis; Orthotropic vs Isotropic material

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Soni, M. (. (2019). Behaviour of two-way spanning walls subjected to out-of-plane loading by numerical analysis. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:e38f8648-a1cd-4db4-8489-a8c82f4b7b75

Chicago Manual of Style (16^th Edition):

Soni, Mohit (author). “Behaviour of two-way spanning walls subjected to out-of-plane loading by numerical analysis.” 2019. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:e38f8648-a1cd-4db4-8489-a8c82f4b7b75.

MLA Handbook (7^th Edition):

Soni, Mohit (author). “Behaviour of two-way spanning walls subjected to out-of-plane loading by numerical analysis.” 2019. Web. 17 Jan 2021.

Vancouver:

Soni M(. Behaviour of two-way spanning walls subjected to out-of-plane loading by numerical analysis. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:e38f8648-a1cd-4db4-8489-a8c82f4b7b75.

Council of Science Editors:

Soni M(. Behaviour of two-way spanning walls subjected to out-of-plane loading by numerical analysis. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:e38f8648-a1cd-4db4-8489-a8c82f4b7b75

Delft University of Technology

26. Xu, Jie (author). An Investigation into Solution Strategies for Nonlinear Finite Element Analysis of a Concrete Column under Blast Loading.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:abe18eff-03a2-4837-a73a-a366735102db

► An explosion event, having a low probability of occurrence but severe consequences, due to a possible structural collapse, is a so-called "Low Probability and High… (more)

▼ An explosion event, having a low probability of occurrence but severe consequences, due to a possible structural collapse, is a so-called "Low Probability and High Consequences (LP-HC)" event[13]. Due to the severe consequences, blast puts a great threat to public security. Thus, civil engineers should take these extreme cases into consideration during the design process to ensure the integrity of the basic frameworks of the structures to provide the possibility to the following rescue works. Nonlinear finite element analysis is a useful method for civil engineers to check the integrity of the structures under blast loading. However, there could be lots of different solution strategies for the same physical situation that may lead to differences in the corresponding numerical results. A solution strategy is a certain combination of different options in all the steps during the setting-up of the finite element model, including the definition of loads, boundary conditions, material models, element types and element sizes. Therefore, to which extent can civil engineers simulate the dynamic behavior of experiments of concrete columns with blast loading by nonlinear finite element analysis is of great interest. In this thesis, 36 different solution strategies for the same physical situation are discussed. DIANA 10.2 Educational Version is applied to generate numerical results of finite element models with different solution strategies. The modelling of boundary conditions, bond effect between steel reinforcements and concrete, blast pressure profiles and the choice of element types and the order of element on the numerical results are investigated and discussed in this thesis by dividing the 36 models into 51 groups. And the question about to which extent can we reduce the computation time while the accuracy is still satisfying is addressed. Firstly, an investigation of literature is performed. Column CONV-7 from Test 1 of Siba’s report is selected. The blast pressure profiles at the bottom, and top of the front face of the column, and the bottom, the mid-height, and the top of the rear face of the column were recorded with pressure gauges. The displacement-time diagrams of the 1.0 m, 1.5 m and 2.0 m from the column footing of the rear face of the column were recorded while only the diagram at 1.0 m from the column footing was reliable. Then the finite element analyses with different solution strategies are performed and compared in groups. In this treatise, 36 finite element analyses with different solution strategies are performed. The numerical displacement results at 1.0 m from the column footing of the rear face of the column are compared to the experimental results.The errors of these finite element analyses with different solution strategies vary from 3.476% to 50.116%. Thus, the choice of solution strategies has a significant influence on the accuracy of the numerical results for nonlinear finite element analyses for this situation. However, there is only a limited number of solution strategies are discussed… Advisors/Committee Members: Hendriks, Max (mentor), Rots, Jan (graduation committee), Tsouvalas, Apostolos (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Explosions; Nonlinear Analyses; NLFEM; Transient Analyses; Solution Strategies

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Xu, J. (. (2019). An Investigation into Solution Strategies for Nonlinear Finite Element Analysis of a Concrete Column under Blast Loading. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:abe18eff-03a2-4837-a73a-a366735102db

Chicago Manual of Style (16^th Edition):

Xu, Jie (author). “An Investigation into Solution Strategies for Nonlinear Finite Element Analysis of a Concrete Column under Blast Loading.” 2019. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:abe18eff-03a2-4837-a73a-a366735102db.

MLA Handbook (7^th Edition):

Xu, Jie (author). “An Investigation into Solution Strategies for Nonlinear Finite Element Analysis of a Concrete Column under Blast Loading.” 2019. Web. 17 Jan 2021.

Vancouver:

Xu J(. An Investigation into Solution Strategies for Nonlinear Finite Element Analysis of a Concrete Column under Blast Loading. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:abe18eff-03a2-4837-a73a-a366735102db.

Council of Science Editors:

Xu J(. An Investigation into Solution Strategies for Nonlinear Finite Element Analysis of a Concrete Column under Blast Loading. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:abe18eff-03a2-4837-a73a-a366735102db

Delft University of Technology

27. Peponis, Stathis (author). Assessment of Existing Slender Masonry Walls beyond the Scope of the EN 1996 Norm: Numerically Based Analytical Solution to determine the Capacity under combined Vertical and Lateral Loading.

Degree: 2020, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:370dd662-e546-412a-b5a8-9b555441632c

►

In the last decade, maintenance and adaptive reuse, of the existing building stock, have gained ground in the construction sector. For the adaptive reuse of… (more)

▼

In the last decade, maintenance and adaptive reuse, of the existing building stock, have gained ground in the construction sector. For the adaptive reuse of a building, it is required to analyze, meticulously, the existing structure. Unreinforced masonry structures are indicative of the Dutch built environment. For the assessment of their structural capacity, the European Standard EN 1996 is, currently, applied. Masonry walls of high slenderness, often, comprise the structure of existing buildings, in the Netherlands. It has been noticed that the EN 1996 norm underestimates the vertical resistance of slender walls. This study attempts to extend the applicability of the EN 1996 norm to slender masonry walls, since the norm serves for the assessment of existing structures. Particularly, the research objective is to find an appropriate verification method for existing slender masonry walls, in one-way bending. Literature research is, initially, conducted, with respect to alternative formulas for the calculation of the vertical resistance of slender masonry walls. The formula in the EN 1996 norm and the alternative formulas are reviewed, considering a case study. The case study is one of the slenderest interior masonry walls, that form the structure of a relevant existing building block in Amsterdam. The latter was constructed in the late 19th – early 20th century. The engineering firm STRACKEE BV Bouwadviesbureau provided the technical drawings of the building block. Reference values for the vertical resistance, of existing slender masonry walls, are necessary to develop an appropriate formula for their verification. Therefore, the next step of the research is the numerical analysis. The response of slender masonry walls, subjected to combined vertical and lateral loading, is estimated according to the results of FE analysis. The case study is the reference for the geometry of the FE model. Indicative, for the construction period, properties of masonry are the input for the initial material model. Further, models of slender masonry walls with different geometrical and material properties are analyzed. Specifically, a parametric study is done, to define the influence of geometrical and material properties on the vertical resistance. Based on the FE analysis results, a new formula is proposed. The formula estimates the vertical resistance of existing slender masonry walls, subjected to combined vertical and lateral loading.

Civil Engineering | Building Engineering

Advisors/Committee Members: Rots, Jan (graduation committee), Pasterkamp, Sander (mentor), Esposito, Rita (graduation committee), Copuroglu, Oguzhan (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Unreinforced Masonry; Buckling; Lateral Loads; Existing Buildings; EN 1996; Analytical Solutions; Finite Element Method

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Peponis, S. (. (2020). Assessment of Existing Slender Masonry Walls beyond the Scope of the EN 1996 Norm: Numerically Based Analytical Solution to determine the Capacity under combined Vertical and Lateral Loading. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:370dd662-e546-412a-b5a8-9b555441632c

Chicago Manual of Style (16^th Edition):

Peponis, Stathis (author). “Assessment of Existing Slender Masonry Walls beyond the Scope of the EN 1996 Norm: Numerically Based Analytical Solution to determine the Capacity under combined Vertical and Lateral Loading.” 2020. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:370dd662-e546-412a-b5a8-9b555441632c.

MLA Handbook (7^th Edition):

Peponis, Stathis (author). “Assessment of Existing Slender Masonry Walls beyond the Scope of the EN 1996 Norm: Numerically Based Analytical Solution to determine the Capacity under combined Vertical and Lateral Loading.” 2020. Web. 17 Jan 2021.

Vancouver:

Peponis S(. Assessment of Existing Slender Masonry Walls beyond the Scope of the EN 1996 Norm: Numerically Based Analytical Solution to determine the Capacity under combined Vertical and Lateral Loading. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:370dd662-e546-412a-b5a8-9b555441632c.

Council of Science Editors:

Peponis S(. Assessment of Existing Slender Masonry Walls beyond the Scope of the EN 1996 Norm: Numerically Based Analytical Solution to determine the Capacity under combined Vertical and Lateral Loading. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:370dd662-e546-412a-b5a8-9b555441632c

Delft University of Technology

28. Goud, Thomas (author). Rocking revisited 4: Analysis of rocking-induced stresses for concrete breakwater armour units.

Degree: 2020, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:f2613769-08af-404a-b1a0-1d076318edcd

►

When a breakwater is under heavy wave attack, the concrete armour units will occasionally move, causing a collision between two concrete armour units. This process… (more)

Subjects/Keywords: breakwater; concrete armour unit; Monte Carlo simulation; Probability of failure; impact velocity; impact force; stress

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Goud, T. (. (2020). Rocking revisited 4: Analysis of rocking-induced stresses for concrete breakwater armour units. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:f2613769-08af-404a-b1a0-1d076318edcd

Chicago Manual of Style (16^th Edition):

Goud, Thomas (author). “Rocking revisited 4: Analysis of rocking-induced stresses for concrete breakwater armour units.” 2020. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:f2613769-08af-404a-b1a0-1d076318edcd.

MLA Handbook (7^th Edition):

Goud, Thomas (author). “Rocking revisited 4: Analysis of rocking-induced stresses for concrete breakwater armour units.” 2020. Web. 17 Jan 2021.

Vancouver:

Goud T(. Rocking revisited 4: Analysis of rocking-induced stresses for concrete breakwater armour units. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:f2613769-08af-404a-b1a0-1d076318edcd.

Council of Science Editors:

Goud T(. Rocking revisited 4: Analysis of rocking-induced stresses for concrete breakwater armour units. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:f2613769-08af-404a-b1a0-1d076318edcd

Delft University of Technology

29. Grund, Mitchel (author). Urban quay walls: A numerical study to recognize foundation defects via masonry damage patterns.

Degree: 2020, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:4688cc06-dd2a-451c-b6bb-0c0a0068802e

► The city of Amsterdam has a large number of old quay walls with rotten foundation piles. These foundation piles need to be identified and measures… (more)

▼ The city of Amsterdam has a large number of old quay walls with rotten foundation piles. These foundation piles need to be identified and measures need to be taken. The urban quay walls are supported by two types of foundation: pinewood piles, which are easily affected by bacterial decay and spruce piles. To understand the mechanical behaviour of quay walls better, it is needed to know the type of wood used for each pile foundation along the 200 km of quay walls currently showing signs of damage. For that reason, specialized diving teams are hired to identify the rotten piles and foundation defects, to know which foundation piles need replacement. Since the area is very large and diving inspections are costly and lengthy in time, there is a need to correlate the foundation defect to the masonry damage above the water level. The masonry above the water level could give lots of information about the condition of the foundation, due to cracks or deformations in the masonry. This research could help to relate foundation defects with damage patterns in the masonry. Understanding this relation helps to identify foundation defects at an earlier stage and helps the municipality to prioritize the replacement of foundation piles. The thesis aims to find indicators above the water line to identify foundation problems by studying the crack patterns in a typical unreinforced masonry quay in Amsterdam. From the point of view of the masonry structures, failure of foundation piles results in a settlement deformation causing cracking. This research will support the current work by Sweco in helping to find foundation defects from above the waterline via masonry damage patterns in quay walls. This will be achieved by performing a parametric study, bases on 2D nonlinear finite element analyses, varying the extent of the pile defects, the material properties of the masonry and lateral boundary conditions for a selected representative base case. To simulate the damage in masonry, a smeared crack approach was used. The foundation defects were simulated by applying a settlement deformation to the quay wall. A Gaussian settlement deformation profile was imposed and the ratio between the length of the profile and the length of the quay wall was varied to simulate the failure of single or multiple piles. To capture the influence of the material properties of masonry (especially related to tension failure), three types of masonry were defined: weak, average and strong. The influence of the boundary conditions at the edges was checked by performing analyses with horizontally free lateral sides and with horizontally fixed lateral side. This is done to simulate the effect of arching in the structure. Eventually, the influence of the location of the foundation defect was analyzed by comparing a symmetric Gaussian settlement deformation with an asymmetric settlement. The analyses show correlations between the vertical displacement at the top of the structure and the length of the settlement profile. As expected, this can be interpreted with the fact… Advisors/Committee Members: Rots, Jan (mentor), Esposito, Rita (mentor), de Gijt, Jarit (mentor), Roggeveld, Richard (mentor), Delft University of Technology (degree granting institution).

Subjects/Keywords: Unreinforced masonry structures; Quay walls; finite element analysis; Amsterdam

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Grund, M. (. (2020). Urban quay walls: A numerical study to recognize foundation defects via masonry damage patterns. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:4688cc06-dd2a-451c-b6bb-0c0a0068802e

Chicago Manual of Style (16^th Edition):

Grund, Mitchel (author). “Urban quay walls: A numerical study to recognize foundation defects via masonry damage patterns.” 2020. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:4688cc06-dd2a-451c-b6bb-0c0a0068802e.

MLA Handbook (7^th Edition):

Grund, Mitchel (author). “Urban quay walls: A numerical study to recognize foundation defects via masonry damage patterns.” 2020. Web. 17 Jan 2021.

Vancouver:

Grund M(. Urban quay walls: A numerical study to recognize foundation defects via masonry damage patterns. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:4688cc06-dd2a-451c-b6bb-0c0a0068802e.

Council of Science Editors:

Grund M(. Urban quay walls: A numerical study to recognize foundation defects via masonry damage patterns. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:4688cc06-dd2a-451c-b6bb-0c0a0068802e

Delft University of Technology

30. Noortman, Falko (author). Applicability of the Pushover Method for the Seismic Assessment of URM Structures in Groningen: A Case Study of a Low-Rise Apartment Building.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:2eef747e-441f-4358-996a-8db73571ad76

► In Groningen, seismic activity has increased due to the extraction of gas in the area. A large-scale research campaign has been launched with the aim… (more)

▼ In Groningen, seismic activity has increased due to the extraction of gas in the area. A large-scale research campaign has been launched with the aim to assess and safeguard structures in the region. However, an accurate assessment of these buildings turned out to be a challenge, due to the nonlinear behaviour of the masonry and the dynamic nature of a seismic load. A Nonlinear Time History (NLTH) analysis takes into account both these factors, but the computational demand of such a method is considerable. Another method that is widely used to analyse the seismic response of a structure is the Modal Response Spectrum (MRS) method. The computational demand of this method is considerably less compared to NLTH, but nonlinear material behaviour is only taken into account in an indirect manner via a behaviour factor, and the results are considered to be too conservative. A third method is the Nonlinear Pushover (NLPO) method. It takes nonlinear material behaviour into account and compared to NLTH, NLPO is computationally more efficient. Furthermore, an advantage is that it separates capacity from demand. Even though the NLPO method is commonly applied worldwide, its validity still needs to be proven for the Groningen case. Both objectives were studied by looking into a single case study, consisting of a low-rise URM apartment building. The behaviour of the structure is characterised by a weak and strong direction, in which the weak direction is characterised by a relatively low stiffness and lateral capacity compared to the strong direction. The seismic response of the structure is determined according to the MRS, NLPO and NLTH methods. Furthermore, the NLPO analyses are executed using two different computational discretisation methods, namely continuum FEM and macro EFM. DIANA is used as a FEM solver for the MRS, NLPO and NLTH analyses and 3MURI is used for the EFM model. Moreover, a modal and uniform lateral load pattern are taken into account for the NLPO analyses. The conclusions which are drawn from the case study can generally be applied to low-rise URM apartment buildings in Groningen. However, it must be noted that significant alterations in geometry and building materials might influence the results. Furthermore, modelling assumptions have been applied, and it is important to note that the possible influence of these assumptions, may partially limit the extent of the conclusions. Moreover, several limitations are inherent to the studied methods, and cannot be accounted for somehow. All analyses are performed by incrementally increasing the seismic load until one of the near collapse limit state criteria according to NPR 9998 is met. Furthermore, three target displacement methods are evaluated: the capacity spectrum method according to NPR 9998, the regular N2-method, included in the Eurocode 8, and an adaptation of the N2-method which is developed specifically for URM structures by Guerinni. The performance of the structure according to each of the methods is studied subsequently, by looking into the… Advisors/Committee Members: Rots, Jan (mentor), Messali, Francesco (graduation committee), Terwel, Karel (graduation committee), Middelkoop, Erik (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Gronningen; Earthquakes; NLTH; NLPO; MRS; Non linear time History; Nonlinear Pushover; Modal Response Spectrum; URM

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Noortman, F. (. (2019). Applicability of the Pushover Method for the Seismic Assessment of URM Structures in Groningen: A Case Study of a Low-Rise Apartment Building. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:2eef747e-441f-4358-996a-8db73571ad76

Chicago Manual of Style (16^th Edition):

Noortman, Falko (author). “Applicability of the Pushover Method for the Seismic Assessment of URM Structures in Groningen: A Case Study of a Low-Rise Apartment Building.” 2019. Masters Thesis, Delft University of Technology. Accessed January 17, 2021. http://resolver.tudelft.nl/uuid:2eef747e-441f-4358-996a-8db73571ad76.

MLA Handbook (7^th Edition):

Noortman, Falko (author). “Applicability of the Pushover Method for the Seismic Assessment of URM Structures in Groningen: A Case Study of a Low-Rise Apartment Building.” 2019. Web. 17 Jan 2021.

Vancouver:

Noortman F(. Applicability of the Pushover Method for the Seismic Assessment of URM Structures in Groningen: A Case Study of a Low-Rise Apartment Building. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 17]. Available from: http://resolver.tudelft.nl/uuid:2eef747e-441f-4358-996a-8db73571ad76.

Council of Science Editors:

Noortman F(. Applicability of the Pushover Method for the Seismic Assessment of URM Structures in Groningen: A Case Study of a Low-Rise Apartment Building. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:2eef747e-441f-4358-996a-8db73571ad76

Open Access Theses and Dissertations