Dissertation
Development of a general dynamic hysteretic light-frame structure model and study on the torsional behavior of open-front light-frame structures
Washington State University
Doctor of Philosophy (PhD), Washington State University
12/2006
DOI:
https://doi.org/10.7273/000005679
Abstract
Open-front light-frame structures may have significant torsional problems when
attacked by intense earthquakes. Full-size testing is a good tool to be employed to
understand their performance under significant seismic events, but it is limited due to the
high expense. So, a model, which is able to accurately represent the hysteretic dynamic
performance of light-frame structural systems under lateral loads is in demand.
All previous testing showed that the hysteretic behavior of nailed wood joints
governs the response of many wood systems when subjected to lateral loadings.
Unfortunately, commercially available software does not have an appropriate hysteretic
element for a nailed wood joint, and the accuracy and versatility of previously developed
nail joint elements are not satisfactory. A general hysteretic model, BWBN, was modified
to represent the hysteretic behavior of a nailed joint. Based on test data, suitable
parameters for different joint configurations can be estimated using a Genetic Algorithm.
This model was embedded in ABAQUS/Standard (Version 6.5), as a user-defined
element, which accounted for the coupling property of the nail joint action. Detailed
shear walls were simulated and analyzed, and the results agreed well with the test data.
iv
With some modifications on the nailed wood joint model, a super shear wall model
was developed, which describes the behavior of a whole shear wall line. This super shear
wall model consists of two diagonal hysteretic springs, along with the frame members in
the wall, and can predict racking and overturning behavior of shear walls at the same time.
Using this model, a 3-D 2-story building model, which was developed to simulate the
building tested in the CUREE shake table test (Fischer et al. 2001), was analyzed in
ABAQUS/Standard. Comparison of the results validated the accuracy and efficiency of
this super shear wall model.
Using this super shear wall model, a parametric study was conducted to benchmark
current design methods. The parameters included floor or roof diaphragm aspect ratios,
open-front ratios, and possible inclusion of gypsum partition walls. The study shows that
the elastic torsional design method is not satisfactory for open-front light-frame structures,
and design method improvement comments were made accordingly.
Metrics
Details
- Title
- Development of a general dynamic hysteretic light-frame structure model and study on the torsional behavior of open-front light-frame structures
- Creators
- Jian Xu
- Contributors
- James D Dolan (Chair) - Washington State University, Department of Civil and Environmental EngineeringWilliam Franklin Cofer (Committee Member) - Washington State University, Department of Civil and Environmental EngineeringDavid Pollock (Committee Member) - Washington State University, Department of Civil and Environmental EngineeringDavid I. McLean (Committee Member)Kelly Cobeen (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Department of Civil and Environmental Engineering
- Theses and Dissertations
- Doctor of Philosophy (PhD), Washington State University
- Publisher
- Washington State University
- Number of pages
- 295
- Identifiers
- 99901054530801842
- Language
- English
- Resource Type
- Dissertation