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University of Colorado
1.
Kvamme, Jeffrey David.
Performance of Common Treatments for Reinforced Concrete Highway Bridge Decks.
Degree: MS, 2018, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/367 
► This study gathers information on more than 15,000 bridges to examine time domain trends in condition of bridge decks in service that employ several common…
(more)
▼ This study gathers information on more than 15,000 bridges to examine time domain trends in condition of bridge decks in service that employ several common treatments. This study computes average improvement to deck condition due to these treatments and computes the mean intervals of changes in general condition ratings related to the deck’s post-treatment condition and its approximate pre-treatment condition. In addition, this study performs a cost analysis to compare the average unit cost and the cost effectiveness of each treatment. The results show an average improvement to deck condition of 1.31 rating values due to treatment, mean intervals to maintain approximate post-treatment condition ranging from 6.6 years to 19.4 years, and mean intervals to deteriorate to approximate pre-treatment condition ranging from 13.2 years to 29.4 years. Average costs of treatments range from 0.34 per square foot to 14.68 per square foot. Cost effectiveness is computed as cost per duration in years of improved conditions. Cost effectiveness ranges from 0.06 per square foot per year to 0.99 per square foot per year.
Advisors/Committee Members: George Hearn, Paul Goodrum, Ross Corotis.
Subjects/Keywords: bridge; common; concrete; deck; treatment; Civil Engineering; Materials Science and Engineering
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APA (6th Edition):
Kvamme, J. D. (2018). Performance of Common Treatments for Reinforced Concrete Highway Bridge Decks. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/367
Chicago Manual of Style (16th Edition):
Kvamme, Jeffrey David. “Performance of Common Treatments for Reinforced Concrete Highway Bridge Decks.” 2018. Masters Thesis, University of Colorado. Accessed April 18, 2021.
https://scholar.colorado.edu/cven_gradetds/367.
MLA Handbook (7th Edition):
Kvamme, Jeffrey David. “Performance of Common Treatments for Reinforced Concrete Highway Bridge Decks.” 2018. Web. 18 Apr 2021.
Vancouver:
Kvamme JD. Performance of Common Treatments for Reinforced Concrete Highway Bridge Decks. [Internet] [Masters thesis]. University of Colorado; 2018. [cited 2021 Apr 18].
Available from: https://scholar.colorado.edu/cven_gradetds/367.
Council of Science Editors:
Kvamme JD. Performance of Common Treatments for Reinforced Concrete Highway Bridge Decks. [Masters Thesis]. University of Colorado; 2018. Available from: https://scholar.colorado.edu/cven_gradetds/367
University of Colorado
2.
Boudaoui, Khalid.
Development of Educational Software for the Design of Slender Reinforced Concrete Columns.
Degree: MS, 2013, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/22
► Education of undergraduate students in first class of reinforced concrete design must include design of slender compression members since they are common components in…
(more)
▼ Education of undergraduate students in first class of reinforced concrete design must include design of slender compression members since they are common components in structures such as buildings and bridges. Education must engage students to function as designers, that is, to determine the geometry of the member as well as the layout of the steel reinforcement to withstand a set of loadings. Educational software application, CU Slender Column, is developed to support the education of students in reinforced concrete design. CU Slender Column studies single slender reinforced concrete columns with circular cross section. Designs account for slenderness effects by applying the American Concrete Institute (ACI) 318 moment magnification method for both non-sway and sway frames. To help students in the design, CU Slender Column provides feedbacks relative to the accuracy of numerical values of strengths and loads as well as the satisfaction of ACI provisions. Also, it is demonstrated that CU Slender Column is an efficient tool able to deal with a wide range of design situations. The demonstration of the performance of CU Slender Column is done by developing 38 examples exploring different column designs passing or failing in strength or in ACI provisions.
Advisors/Committee Members: George Hearn, Abbie Liel, Franck Vernerey.
Subjects/Keywords: Columns; concrete design; loadings; University of Colorado; software; aci; Civil Engineering; Education; Educational Methods; Higher Education
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APA (6th Edition):
Boudaoui, K. (2013). Development of Educational Software for the Design of Slender Reinforced Concrete Columns. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/22
Chicago Manual of Style (16th Edition):
Boudaoui, Khalid. “Development of Educational Software for the Design of Slender Reinforced Concrete Columns.” 2013. Masters Thesis, University of Colorado. Accessed April 18, 2021.
https://scholar.colorado.edu/cven_gradetds/22.
MLA Handbook (7th Edition):
Boudaoui, Khalid. “Development of Educational Software for the Design of Slender Reinforced Concrete Columns.” 2013. Web. 18 Apr 2021.
Vancouver:
Boudaoui K. Development of Educational Software for the Design of Slender Reinforced Concrete Columns. [Internet] [Masters thesis]. University of Colorado; 2013. [cited 2021 Apr 18].
Available from: https://scholar.colorado.edu/cven_gradetds/22.
Council of Science Editors:
Boudaoui K. Development of Educational Software for the Design of Slender Reinforced Concrete Columns. [Masters Thesis]. University of Colorado; 2013. Available from: https://scholar.colorado.edu/cven_gradetds/22
University of Colorado
3.
Jackson, Kyle Allen.
Probabilistic Models for Uniform and Non-Uniform Snow Loading on Roofs.
Degree: MS, 2011, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/38
► Snow loads account for a majority of roof damage and associated losses in the United States. The significant impact that snow related failures can…
(more)
▼ Snow loads account for a majority of roof damage and associated losses in the United States. The significant impact that snow related failures can have on the safety of people and the economic losses associated with business closures and repair costs make the design and mitigation of snow related failures very important. The purpose of this thesis is to develop models to predict roof snow loads, for use in performance-based engineering. Performance-based snow engineering can provide decision makers with a better, quantitative understanding of snow related risks.
Two probabilistic models were developed to have an understanding of the factors that affect the magnitude and distribution of roof snow load. The models developed are different from building codes and standards, where the model predicts the roof snow load for a single snow event instead of a 50-year maximum roof snow load used in design standards. The first model predicts uniform roof snow loads, given a ground snow load and roof characteristics; the second model predicts non-uniform drifting snow loads for multilevel roofs, given ground snow load, ground snow density and roof characteristics.
Ground snow load hazard curves, or predictions of the probability that a specified ground snow load level will be exceeded in a particular year, are available from weather data. The probabilistic load models can be used in a performance-based engineering framework to predict the likelihood that certain critical deflections or stresses will be exceeded. In this study, the models are used to predict deflections and stresses in an open walkway roof structure. Hazard curves were developed to show the probability of exceedance of a critical deflection for different ground snow loads. Hazard curves of this type can be used in analysis of other light-weight steel structures to develop metrics of structural failure and collapse that can help building owners decide whether to invest in retrofitting roofs.
Advisors/Committee Members: Abbie Liel, Ross Corotis, George Hearn.
Subjects/Keywords: performance-based snow loads; probabilistic models; roof snow loads; snow loading; Civil Engineering
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APA (6th Edition):
Jackson, K. A. (2011). Probabilistic Models for Uniform and Non-Uniform Snow Loading on Roofs. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/38
Chicago Manual of Style (16th Edition):
Jackson, Kyle Allen. “Probabilistic Models for Uniform and Non-Uniform Snow Loading on Roofs.” 2011. Masters Thesis, University of Colorado. Accessed April 18, 2021.
https://scholar.colorado.edu/cven_gradetds/38.
MLA Handbook (7th Edition):
Jackson, Kyle Allen. “Probabilistic Models for Uniform and Non-Uniform Snow Loading on Roofs.” 2011. Web. 18 Apr 2021.
Vancouver:
Jackson KA. Probabilistic Models for Uniform and Non-Uniform Snow Loading on Roofs. [Internet] [Masters thesis]. University of Colorado; 2011. [cited 2021 Apr 18].
Available from: https://scholar.colorado.edu/cven_gradetds/38.
Council of Science Editors:
Jackson KA. Probabilistic Models for Uniform and Non-Uniform Snow Loading on Roofs. [Masters Thesis]. University of Colorado; 2011. Available from: https://scholar.colorado.edu/cven_gradetds/38
University of Colorado
4.
DePaolo, Michael Robert.
A Proposal for a Unified Process to Improve Probabilistic Ground Snow Loads in the United States Using SNODAS Modeled Weather Station Data.
Degree: MS, 2013, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/109
► Snow loads govern roof design in many parts of the United States. These loads are largely prescribed by the American Society of Civil Engineers…
(more)
▼ Snow loads govern roof design in many parts of the United States. These loads are largely prescribed by the American Society of Civil Engineers ASCE 7 Standard for minimum design loads. Where ASCE 7 does not specify snow loads due to extreme local variability, such as in the West, many state jurisdictions have developed individual roof snow load documents and maps. However, among the western states border discrepancies and a general lack of uniformity in the methodology for developing such loads indicates a need for a unified approach. This paper proposes a methodology to develop ground snow loads for the western United States, the application of which is illustrated for the state of
Colorado. An innovative approach is taken which utilizes a hydrological snowpack model, Snow Data Assimilation System (SNODAS), developed by NOAA. This model provides estimates of ground snow depth and snow water content, easily convertible into loads, at 588 SNODAS weather stations in
Colorado. The methodology proposed here then incorporates statistical techniques such as principal component analysis (PCA) and multivariate cluster analyses to regionalize the SNODAS stations by key shared properties. Several types of cluster analyses are evaluated including agglomerative hierarchical clustering (AHC), k-means, and a PCA-based method. Using various statistical and practical measures of quality, a step-wise hybrid method combining both AHC and k-means techniques is found to be the most statistically sound and robust clustering method. A relationship is then developed between ground snow depths and ground snow loads for each cluster of SNODAS weather stations. This paper proposes the following additional steps. A database of National Weather Service CO-OP stations with snow depth only measurements is gathered for the state of interest. The 50-year ground snow depths are extrapolated by testing the goodness-of-fit of several probability distributions. The ground snow depth-load relationships for each cluster produced by the hybrid method are then coupled with these 50-year ground snow depths to produce 50-year ground snow loads. Finally, these ground snow loads are mapped in GIS software using a Kriging geostatistical interpolation method to create continuous snow load isolines.
Advisors/Committee Members: Abbie B. Liel, George Hearn, James Harris.
Subjects/Keywords: climatology; Colorado ground snow loads; SNODAS; snow engineering; snow loads; structural engineering; Atmospheric Sciences; Civil Engineering; Engineering
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APA (6th Edition):
DePaolo, M. R. (2013). A Proposal for a Unified Process to Improve Probabilistic Ground Snow Loads in the United States Using SNODAS Modeled Weather Station Data. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/109
Chicago Manual of Style (16th Edition):
DePaolo, Michael Robert. “A Proposal for a Unified Process to Improve Probabilistic Ground Snow Loads in the United States Using SNODAS Modeled Weather Station Data.” 2013. Masters Thesis, University of Colorado. Accessed April 18, 2021.
https://scholar.colorado.edu/cven_gradetds/109.
MLA Handbook (7th Edition):
DePaolo, Michael Robert. “A Proposal for a Unified Process to Improve Probabilistic Ground Snow Loads in the United States Using SNODAS Modeled Weather Station Data.” 2013. Web. 18 Apr 2021.
Vancouver:
DePaolo MR. A Proposal for a Unified Process to Improve Probabilistic Ground Snow Loads in the United States Using SNODAS Modeled Weather Station Data. [Internet] [Masters thesis]. University of Colorado; 2013. [cited 2021 Apr 18].
Available from: https://scholar.colorado.edu/cven_gradetds/109.
Council of Science Editors:
DePaolo MR. A Proposal for a Unified Process to Improve Probabilistic Ground Snow Loads in the United States Using SNODAS Modeled Weather Station Data. [Masters Thesis]. University of Colorado; 2013. Available from: https://scholar.colorado.edu/cven_gradetds/109
University of Colorado
5.
Georg, Ryan.
Historical Analysis of Arches and Modern Shells.
Degree: MS, 2014, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/117
► Prior 20th century, the study of masonry arches and domes consumed years of work with some of the greatest minds in history. However, with…
(more)
▼ Prior 20th century, the study of masonry arches and domes consumed years of work with some of the greatest minds in history. However, with the advancements of materials, such as steel and concrete, and the use of computer analysis programs, the art of masonry arch and shell design has become stagnant. With various design methods seen throughout literature, an appreciation for the development of these methods, through basic hand calculations, must be understood to first, ensure correct design principles are applied and second, aid in the further development of these methods.
This thesis starts with an extensive literature review of historical analysis and design methodology, starting in the 16th century and continuing on through the mid-20th century and today's current practices. The review focuses first on masonry arch design, including principles of geometric design, wedge theory, line of thrust and the ultimate load theorem. The second part views the design and analysis of domes and vaults, concluding with a case study of St. Peter's Dome in Rome.
The thesis continues by reviewing the derivations of a beam and plate subjected to flexure, prior to the thin shell derivation. In all three cases, equilibrium, compatibility and stress-strain relationships are considered to develop the differential equation relating transverse displacement to the load. This methodology is chosen in order to introduce the shell gradually by building upon the initial derivations of the beam and plate.
Tying the historical design methods and derivation of the shell equation, the design and analysis of a circular cylindrical shell will be conducted. The derived shell equation will first be simplified to membrane theory, followed by the derivations of the governing equations for shells through the theory of shallow shells. The analysis of the cylindrical shell will hold similarity to the analysis of statically indeterminate beams.
Finally, the methodology of shallow shells will be incorporated into the development of a reinforced concrete design and analysis program. The development of this program will simplify future analyses of circular cylindrical shells and improve design efficiency. The resulting design methodology will be recorded to aid in the future design of shells and the inspection of current structures. The thesis concludes by offering future studies to further develop the field of masonry arch and dome design.
Advisors/Committee Members: Victor Saouma, George Hearn, Abbie Liel.
Subjects/Keywords: masonry arch design; geometric design; wedge theory; line of thrust; ultimate load theorem; equilibrium; compatibility; stress-strainrelationships; Civil Engineering
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APA (6th Edition):
Georg, R. (2014). Historical Analysis of Arches and Modern Shells. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/117
Chicago Manual of Style (16th Edition):
Georg, Ryan. “Historical Analysis of Arches and Modern Shells.” 2014. Masters Thesis, University of Colorado. Accessed April 18, 2021.
https://scholar.colorado.edu/cven_gradetds/117.
MLA Handbook (7th Edition):
Georg, Ryan. “Historical Analysis of Arches and Modern Shells.” 2014. Web. 18 Apr 2021.
Vancouver:
Georg R. Historical Analysis of Arches and Modern Shells. [Internet] [Masters thesis]. University of Colorado; 2014. [cited 2021 Apr 18].
Available from: https://scholar.colorado.edu/cven_gradetds/117.
Council of Science Editors:
Georg R. Historical Analysis of Arches and Modern Shells. [Masters Thesis]. University of Colorado; 2014. Available from: https://scholar.colorado.edu/cven_gradetds/117
University of Colorado
6.
Sonavane, Trupti.
Analysis of Arches.
Degree: MS, 2014, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/119
► The purpose of this thesis is to develop a preliminary guide for the analysis and design of symmetrical circular arches. In the context of…
(more)
▼ The purpose of this thesis is to develop a preliminary guide for the analysis and design of symmetrical circular arches. In the context of the graduate curriculum that typically limits itself to rectilinear structures, this thesis makes an effort to apply basic principles (virtual work and the flexibility method) towards deriving analytic solutions for different types of elastic arches (reactions and internal forces). To the best of our knowledge, this is the most comprehensive repository of such closed formed solutions. To illustrate their application, the preliminary design of a concrete arch is reported. Furthermore, analytical results are assessed to assist engineers gain a "feel" for arch behavior. The study broadly covers semicircular arches. The analysis includes different loading as well as support conditions that lead to statically determinate or indeterminate structural design cases. Effects of unsymmetrical loading conditions on these structures are also briefly covered in their analysis. The analytical solutions are derived with Mathematica, compared with reported analytical solutions (when available),validated with SAP 2000 models and used through Matlab for the design example. Further,this design guide helps relate structural behavior of semicircular arches with their geometry. Influence of aspects like span - to - rise ratio on horizontal thrust, support reactions, and forces across the span provides intuitive understanding of these structures. The study concludes with simplified analytical solutions and preliminary design recommendations.
Advisors/Committee Members: Victor Saouma, Abie Liel, George Hearn.
Subjects/Keywords: elastic arches; arch behavior; Engineering
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APA (6th Edition):
Sonavane, T. (2014). Analysis of Arches. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/119
Chicago Manual of Style (16th Edition):
Sonavane, Trupti. “Analysis of Arches.” 2014. Masters Thesis, University of Colorado. Accessed April 18, 2021.
https://scholar.colorado.edu/cven_gradetds/119.
MLA Handbook (7th Edition):
Sonavane, Trupti. “Analysis of Arches.” 2014. Web. 18 Apr 2021.
Vancouver:
Sonavane T. Analysis of Arches. [Internet] [Masters thesis]. University of Colorado; 2014. [cited 2021 Apr 18].
Available from: https://scholar.colorado.edu/cven_gradetds/119.
Council of Science Editors:
Sonavane T. Analysis of Arches. [Masters Thesis]. University of Colorado; 2014. Available from: https://scholar.colorado.edu/cven_gradetds/119
University of Colorado
7.
Wang, Yao.
The Effect of Temperature on Moisture Transfer in Concrete.
Degree: MS, 2014, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/156
► Moisture transfer is a major concern for predicting the durability and serviceability of concrete. To predict moisture transfer in concrete, one should not only…
(more)
▼ Moisture transfer is a major concern for predicting the durability and serviceability of concrete. To predict moisture transfer in concrete, one should not only analyze the effect of moisture gradient, but also consider the effect of temperature gradient. This effect is called Soret effect. Moreover, depending on the experimental results, the value of coefficient was calculated and used to quantify the Soret effect. This thesis presents results of an experimental investigation of how the temperature gradient affects the moisture in concrete. The thesis includes two major parts. The first part introduces the background information as well as the theoretical review which includes theory definition and formula derivation. The second major part includes the development of the experimental setup, analysis of the results and formulation of the governing equation to characterize the moisture and temperature coupling effect. The investigational and numerical results in this section are used to validate assumptions made about how the temperature gradient affects the moisture transfer in concrete.
Advisors/Committee Members: Yunping Xi, George Hearn, Petros Sideris.
Subjects/Keywords: moisture; Soret Effect; temperature; Civil Engineering; Engineering Science and Materials
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APA (6th Edition):
Wang, Y. (2014). The Effect of Temperature on Moisture Transfer in Concrete. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/156
Chicago Manual of Style (16th Edition):
Wang, Yao. “The Effect of Temperature on Moisture Transfer in Concrete.” 2014. Masters Thesis, University of Colorado. Accessed April 18, 2021.
https://scholar.colorado.edu/cven_gradetds/156.
MLA Handbook (7th Edition):
Wang, Yao. “The Effect of Temperature on Moisture Transfer in Concrete.” 2014. Web. 18 Apr 2021.
Vancouver:
Wang Y. The Effect of Temperature on Moisture Transfer in Concrete. [Internet] [Masters thesis]. University of Colorado; 2014. [cited 2021 Apr 18].
Available from: https://scholar.colorado.edu/cven_gradetds/156.
Council of Science Editors:
Wang Y. The Effect of Temperature on Moisture Transfer in Concrete. [Masters Thesis]. University of Colorado; 2014. Available from: https://scholar.colorado.edu/cven_gradetds/156
University of Colorado
8.
Geis, Jamie Marie.
The Effects of Snow Loading on Lightweight Metal Buildings with Open-Web Steel Joists.
Degree: MS, 2011, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/227
► The implications and consequences of snow loading on buildings can be significant, with failures resulting in damage, casualties, and building downtime. This study seeks…
(more)
▼ The implications and consequences of snow loading on buildings can be significant, with failures resulting in damage, casualties, and building downtime. This study seeks to probabilistically quantify the effects and consequences of snow-induced building failure and to examine the behavior and performance of lightweight metal buildings with open-web steel joists to snow overloading. One part of the study focused on the quantification of national and worldwide building failure trends. In terms of snow-induced incidents, 1,029 national and 91 international building failures revealed patterns of roof failure attributed to the amount of snow, rain-on-snow mixes, and building problems. Warehouses, factories, and commercial buildings were most commonly affected. The second part of the study centered on the analysis of open-web steel joist roof systems, which may be particularly vulnerable to snow-related failures. Seventy-one archetypical lightweight metal buildings were identified, each with different design characteristics that may have an influence on structural response. Nonlinear simulation models for seven archetypical buildings were developed and subjected to pushdown analyses under uniform snow loads. Each building was modeled independently and building responses were compared. Results from the nonlinear static pushover analyses show that the open-web steel joist roof systems yield when loaded with roof snow loads about double their design roof snow load capacities. This overload capacity implies that there is an adequate level of built-in safety when considering snow overload due to extreme or unanticipated snow events, such as rain-on-snow or drifted snow. All buildings exhibited the same type of response trend, with elastic linear responses up to the point of yielding, and inelastic strain hardening responses after the point of yielding. Through a deflection-controlled static pushover analysis, one building was analyzed with increasing incremental deflections at mid-span until the joist's maximum deflection was achieved, which resulted in major in-plane yielding of the top and bottom chords and movement of the neutral axis of the joist into the top chord. Advancement and development of the building models in this study will lead to a broad and representative set of models aimed with the intention of furthering our understanding of open-web steel joist roof systems.
Advisors/Committee Members: Abbie B. Liel, George Hearn, Siva Mettupalayam.
Subjects/Keywords: buildings; failure; lightweight; open web steel joists; snow; Civil Engineering
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APA (6th Edition):
Geis, J. M. (2011). The Effects of Snow Loading on Lightweight Metal Buildings with Open-Web Steel Joists. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/227
Chicago Manual of Style (16th Edition):
Geis, Jamie Marie. “The Effects of Snow Loading on Lightweight Metal Buildings with Open-Web Steel Joists.” 2011. Masters Thesis, University of Colorado. Accessed April 18, 2021.
https://scholar.colorado.edu/cven_gradetds/227.
MLA Handbook (7th Edition):
Geis, Jamie Marie. “The Effects of Snow Loading on Lightweight Metal Buildings with Open-Web Steel Joists.” 2011. Web. 18 Apr 2021.
Vancouver:
Geis JM. The Effects of Snow Loading on Lightweight Metal Buildings with Open-Web Steel Joists. [Internet] [Masters thesis]. University of Colorado; 2011. [cited 2021 Apr 18].
Available from: https://scholar.colorado.edu/cven_gradetds/227.
Council of Science Editors:
Geis JM. The Effects of Snow Loading on Lightweight Metal Buildings with Open-Web Steel Joists. [Masters Thesis]. University of Colorado; 2011. Available from: https://scholar.colorado.edu/cven_gradetds/227
University of Colorado
9.
Faris, Jerod B.
Software for Determining the Capacity of Bolt Groups Under Eccentric Loads.
Degree: MS, 2012, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/315
► In steel construction, it is not uncommon to encounter a bolted connection that supports an eccentric load. Determining the capacity of the bolted connection is…
(more)
▼ In steel construction, it is not uncommon to encounter a bolted connection that supports an eccentric load. Determining the capacity of the bolted connection is dependent on the location and attitude of the applied eccentric load. There have been numerous proposed design methods for determining this capacity. These include the elastic method, the modified elastic method, the plastic method and the instantaneous center method. The instantaneous center method is the preferred method in the current AISC Steel Construction Manual (13th Edition) to design a bolt group under eccentric loads. This method, however, is complicated for design engineers since it requires an iterative analysis. Design engineers are then left with the option of laying out the bolt group to match one of the pre-populated design tables or performing a simplified and conservative elastic analysis. Neither option is particular appealing given that it is not always possible to match the design tables and design engineers are expected to provide competitive and efficient designs. The software developed in this thesis allows design engineers to quickly obtain the capacity of any bolt group using the instantaneous center method. This removes the limitations on design engineers and allows them to provide the best possible connections. The software also provides the capacity of a given bolt group using both the elastic and plastic method, in order to not limit design engineers to one particular method. While the instantaneous center method is preferred, by providing the results for all methods, the design engineer is given complete freedom to use the software in a way that works best for them.
Advisors/Committee Members: George Hearn, Abbie B. Liel, Mettupalayam V. Sivaselvan.
Subjects/Keywords: bolt groups; eccentric; software; Civil Engineering
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APA (6th Edition):
Faris, J. B. (2012). Software for Determining the Capacity of Bolt Groups Under Eccentric Loads. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/315
Chicago Manual of Style (16th Edition):
Faris, Jerod B. “Software for Determining the Capacity of Bolt Groups Under Eccentric Loads.” 2012. Masters Thesis, University of Colorado. Accessed April 18, 2021.
https://scholar.colorado.edu/cven_gradetds/315.
MLA Handbook (7th Edition):
Faris, Jerod B. “Software for Determining the Capacity of Bolt Groups Under Eccentric Loads.” 2012. Web. 18 Apr 2021.
Vancouver:
Faris JB. Software for Determining the Capacity of Bolt Groups Under Eccentric Loads. [Internet] [Masters thesis]. University of Colorado; 2012. [cited 2021 Apr 18].
Available from: https://scholar.colorado.edu/cven_gradetds/315.
Council of Science Editors:
Faris JB. Software for Determining the Capacity of Bolt Groups Under Eccentric Loads. [Masters Thesis]. University of Colorado; 2012. Available from: https://scholar.colorado.edu/cven_gradetds/315
University of Colorado
10.
Damrongwiriyanupap, Nattapong.
Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures.
Degree: PhD, 2010, University of Colorado
URL: https://scholar.colorado.edu/cven_gradetds/35
► Chloride is one of the aggressive chemicals that can threat to reinforced concrete structures. This threat is aggravated by damage due to corrosion of…
(more)
▼ Chloride is one of the aggressive chemicals that can threat to reinforced concrete structures. This threat is aggravated by damage due to corrosion of reinforcing steel. Over the years, there have been several models related to chloride diffusion in concrete for predicting the service life of reinforced concrete structures subjected to chloride attack. These can be mathematically characterized by diffusion equation based on Fick's law and by sophisticated transport theory, the Nernst-Planck equation. In this thesis, statistical, theoretical, and experimental studies were conducted on the penetration of deicing salts into concrete structures mainly focused on chloride-induced corrosion of reinforcement.
A statistical study presented an analytic method based on a simple solution of one-dimensional diffusion equation, Fick's law, for predicting the probabilistic features of corrosion initiation time of reinforcement in concrete structures subjected to chloride environments. A theoretical modeling was conducted to investigate ion transport in concrete described based on the physical model, the Nernst-Planck equation, which included diffusion mechanism due to ionic concentration gradient and migration process due to electrostatic potential gradient. The model considered the transport of not only chloride ion but also other chemical species involved in the concrete pore solution such as hydroxyl, sodium, potassium, and calcium ions. Then, the model was extended to study the effect of moisture and temperature on the transport of these ions. The two coupled effects of moisture diffusion and chloride penetration; and heat flow and chloride penetration were incorporated in the mathematical model. Several numerical examples were simulated and solved by the proposed models and the obtained results agreed very well with the available test data. The results also showed the basic trends of ion transport in concrete with various initial and boundary conditions. An experimental study on multi-species aggressive chemicals diffusion in concrete was performed based on chloride ponding test. The penetration rate of different chloride-based solutions related to deicers used for ice and snow control was selected as a focus of this task. The experimental results obtained from this study showed that chloride ingress into concrete is dependent on the cations associated in solutions.
Advisors/Committee Members: Yunping Xi, Victor Saouma, George Hearn, Sivaselvan Mettupalayam, Kevin Rens.
Subjects/Keywords: chloride; concrete; deicing salts; moisture; temperature; Nernst-Planck equation; Civil Engineering
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APA (6th Edition):
Damrongwiriyanupap, N. (2010). Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/cven_gradetds/35
Chicago Manual of Style (16th Edition):
Damrongwiriyanupap, Nattapong. “Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures.” 2010. Doctoral Dissertation, University of Colorado. Accessed April 18, 2021.
https://scholar.colorado.edu/cven_gradetds/35.
MLA Handbook (7th Edition):
Damrongwiriyanupap, Nattapong. “Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures.” 2010. Web. 18 Apr 2021.
Vancouver:
Damrongwiriyanupap N. Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures. [Internet] [Doctoral dissertation]. University of Colorado; 2010. [cited 2021 Apr 18].
Available from: https://scholar.colorado.edu/cven_gradetds/35.
Council of Science Editors:
Damrongwiriyanupap N. Modeling the Penetration of Multi-Species Aggressive Chemicals into Concrete Structures. [Doctoral Dissertation]. University of Colorado; 2010. Available from: https://scholar.colorado.edu/cven_gradetds/35
. 
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