Thesis
A numerical analysis of seismic performance of cross-laminated timber shear wall assemblies with enhanced anchor tiedown systems
Washington State University
Master of Science (MS), Washington State University
2016
Handle:
https://hdl.handle.net/2376/102956
Abstract
Cross-laminated timber (CLT) was first introduced in Austria in the early 1990's and has slowly gained momentum in the last decade. It has been shown that CLT is a very rigid system. When built with the traditional hold-down type construction, CLT walls with aspect ratios greater than 1:1 demonstrate a rocking motion. This type of deflection behavior requires highly ductile hold-down connections in high seismic regions, as the connection adds an increased amount of ductility to the overall building system. With the two different connection geometries proposed, CLT wall panel assemblies were numerically modeled using ABAQUS 3D [2014]. The lateral performance of CLT shear walls and hold-down connection assemblies were analyzed in order to quantify and compare the systems stiffness, displacement capacity, and the amount of dissipated energy occurring during the application of a prescribed lateral displacement. As the research described was performed using ABAQUS finite element software, the modeling techniques needed to be validated against physical test data. This was achieved by obtaining physical test data from a NEESCLT project that investigated the effects of including a post-tensioned rod into CLT construction to introduce self-centering abilities in the building's lateral system. After the numerical analyses were performed, the performance of the CLT hold-down assemblies was investigated numerically to determine if future research should be conducted using the proposed hold-down systems. The "Thru Rod" hold-down system performed well, where analysis of the CLT wall assembly predicted a story drift ratio capacity of about 10% with total dissipated energy ranging from 100 kip-in to 1000 kip-in depending on the hold-down configuration used. The numerical analyses of the "Bearing Enhancement Pipe Anchor" system predicted a maximum story drift ratio of 6% with dissipated energy ranging from 45 kip-in to 160 kip-in.
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Details
- Title
- A numerical analysis of seismic performance of cross-laminated timber shear wall assemblies with enhanced anchor tiedown systems
- Creators
- Tanner Louis Reijm
- 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
- 99900525022401842
- Language
- English
- Resource Type
- Thesis