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You searched for subject:(Resettable devices). Showing records 1 – 2 of 2 total matches.

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University of Canterbury

1. Franco Anaya, Roberto. Seismic Performance of Semi-Active Control Systems.

Degree: Civil and Natural Resources Engineering, 2008, University of Canterbury

The main purpose of this research is to investigate the effectiveness and feasibility of semi-active control systems for structural protection during severe earthquake loading. However, the research reported herein also involves analytical studies on the effect of adding viscous damping to the second and fourth quadrants of the force-displacement curve, and laboratory and field testing of a fibre-optic gyroscope (FOG) for measuring rotations in civil engineering structures. The concept of the 2-4 viscous damping is introduced to reduce the response of single-degree-of-freedom (SDOF) systems subjected to harmonic and earthquake excitations. This concept involves the addition of structural viscous damping to the second and fourth quadrants of the force-displacement graph. Time-history analyses and response spectra for various SDOF systems are carried out to assess the effect of adding 2-4 viscous damping. The analytical results indicate that the addition of 2-4 viscous damping is beneficial for reducing the harmonic and seismic response of a wide range of SDOF systems. A newly developed semi-active resettable device is proposed to reduce the seismic response of a one-fifth scale structure. The device is investigated as part of a resettable tendon system installed in the structure. Nonlinear dynamic analyses are performed to determine the optimal configuration of the resettable tendon in the structure. Several shake table tests are performed on the structure equipped with two resettable devices. The dynamic characteristics of the structure and the devices are described. Various earthquake records at different levels of intensity are used during the seismic testing. Different control laws are employed to manipulate the hysteretic behaviour of the devices. The results of the shake table tests validate the effectiveness of the resettable devices to reduce the seismic response of structures. Analytical studies are performed to determine the optimal utilization of the resettable devices in a twelve-storey reinforced concrete building. The seismic performance of the structure is discussed in relation to the number and distribution of the devices. Inelastic time-history analyses are carried out to assess the effectiveness of the devices to reduce the seismic response of the building. The impact of various tendon arrangements and different control laws on the earthquake response is investigated. Relevant issues for the implementation of the resettable devices in actual building systems are identified. Finally, a new measurement concept based on the use of the fibre-optic gyroscope is proposed to measure rotation rates, rotations, displacements and inter-storey drifts of civil engineering structures. FOGs are compact, easy to install and, unlike conventional linear potentiometers, do not require a fixed reference frame to operate. Measurements recorded during the seismic testing of the one-fifth scale structure and displacement measurements at the Sky Tower in Auckland validate the suitability of the FOGs for…

Subjects/Keywords: Semi-active control; Resettable devices; 2-4 viscous damping; Seismic response reduction; Fibre-optic gyroscopes

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

APA (6th Edition):

Franco Anaya, R. (2008). Seismic Performance of Semi-Active Control Systems. (Thesis). University of Canterbury. Retrieved from http://hdl.handle.net/10092/1902

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Franco Anaya, Roberto. “Seismic Performance of Semi-Active Control Systems.” 2008. Thesis, University of Canterbury. Accessed November 12, 2019. http://hdl.handle.net/10092/1902.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Franco Anaya, Roberto. “Seismic Performance of Semi-Active Control Systems.” 2008. Web. 12 Nov 2019.

Vancouver:

Franco Anaya R. Seismic Performance of Semi-Active Control Systems. [Internet] [Thesis]. University of Canterbury; 2008. [cited 2019 Nov 12]. Available from: http://hdl.handle.net/10092/1902.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Franco Anaya R. Seismic Performance of Semi-Active Control Systems. [Thesis]. University of Canterbury; 2008. Available from: http://hdl.handle.net/10092/1902

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


University of Canterbury

2. Chase, J.G. Semi-Active Resettable Devices for Seismic Protection of Civil Engineering Structures.

Degree: Mechanical Engineering., 2008, University of Canterbury

This paper describes analytical and experimental studies into the effectiveness and feasibility of semi-active resettable devices for seismic protection of civil engineering structures. A series of shake table tests were performed on a one-fifth scale structure equipped with two newly developed resettable devices. The devices were installed as part of the lateral bracing of the structure to reduce structural responses induced by different seismic excitations. The independent chamber controlled devices can modify the hysteretic behavior of the structure by using different control laws. The results of the shake table tests are presented and interpreted in this paper. Following the experimental validation of the resettable devices, analytical studies were carried out to investigate the performance of a twelve-storey reinforced concrete building subjected to earthquake loading and controlled by resettable devices. Computer simulations were carried out to determine the optimal utilization of the resettable devices in the structure. In this paper, the optimal distribution of the devices is investigated and the effects of different control laws on the seismic response are discussed.

Subjects/Keywords: resettable devices; seismic protection; semi-active structural control; Fields of Research::290000 Engineering and Technology::290800 Civil Engineering::290801 Structural engineering

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

APA (6th Edition):

Chase, J. G. (2008). Semi-Active Resettable Devices for Seismic Protection of Civil Engineering Structures. (Thesis). University of Canterbury. Retrieved from http://hdl.handle.net/10092/2202

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Chase, J G. “Semi-Active Resettable Devices for Seismic Protection of Civil Engineering Structures.” 2008. Thesis, University of Canterbury. Accessed November 12, 2019. http://hdl.handle.net/10092/2202.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Chase, J G. “Semi-Active Resettable Devices for Seismic Protection of Civil Engineering Structures.” 2008. Web. 12 Nov 2019.

Vancouver:

Chase JG. Semi-Active Resettable Devices for Seismic Protection of Civil Engineering Structures. [Internet] [Thesis]. University of Canterbury; 2008. [cited 2019 Nov 12]. Available from: http://hdl.handle.net/10092/2202.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chase JG. Semi-Active Resettable Devices for Seismic Protection of Civil Engineering Structures. [Thesis]. University of Canterbury; 2008. Available from: http://hdl.handle.net/10092/2202

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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