Thesis
Development of fragility curves for cold-formed steel light-framed structural systems: a two-pronged approach
Washington State University
Master of Science (MS), Washington State University
2010
Handle:
https://hdl.handle.net/2376/101115
Abstract
The use of Cold-Formed Steel (CFS) shear walls has become increasingly prevalent in the construction of low-rise residential structures. Due to the increase of CFS construction in low-rise residential structures, there is an increased demand for performance based seismic analysis of CFS shear walls. Fragility functions were developed to aid in the performance based seismic analysis of CFS structures. Fragility functions are a very useful tool for such an analysis as they are used to estimate the probability of damage that a structure may incur when subject to seismic loading. Fragility curves in this document were constructed using two separate approaches. The first approach was to develop fragility curves based on test data. Fragility curves based on test data were developed using Inter-Story Drift (ISD) as the Engineering Demand Parameter (EDP). Cyclic and monotonic test data from experiments conducted by Chen (2004), Serette (1997), Nguyen, Hall and Serette (1996), Boudreault (2005), Branston, Boudreault and Chen (2004), Blais (2006), Hikita (2006), Rokas (2006) and Branston (2004) was used to construct fragility curves for the following wall systems: * CFS System #1: CFS walls with wood structural panel sheathing (plywood or OSB), seismic hold-downs and various fastener spacing. * CFS System #2: CFS walls with 8 mil or 23 mil exterior steel sheathing, seismic hold-downs and various fastener spacing. * CFS System #3: CFS walls with exterior flat strap X-bracing and seismic hold-downs. The second approach to construct fragility curves for above mentioned CFS wall systems used Peak Ground Acceleration (PGA) as the EDP. The development of fragility curves of this nature involved the use of the program SAPWood to perform an Incremental Dynamic Analysis (IDA) based on idealization of wall specimens as Single-Degree of Freedom (SDOF) spring elements.
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Details
- Title
- Development of fragility curves for cold-formed steel light-framed structural systems
- Creators
- Alexander Grummel
- Contributors
- J. Daniel Dolan (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525372201842
- Language
- English
- Resource Type
- Thesis