Evolutionary Parameter Hysteretic Model for Wood Shear Walls
Publication: Journal of Structural Engineering
Volume 133, Issue 8
Abstract
The hysteretic behavior of wood shear walls subjected to cyclic loading exhibit highly nonlinear force-displacement responses. There exists a careful balance between model complexity and necessary accuracy. In fact, the most widely used models for hysteretic behavior utilize piecewise-linear functions with static parameters to model the nonlinear hysteretic response and are often unable to capture some of the significant characteristics observed under experimental testing. This paper describes a new evolutionary parameter hysteretic model (EPHM) and illustrates its use in a number of applications including the development of seismic fragility curves. The proposed model is validated using the results of two full-scale shake table tests and eight cyclic shear wall tests with varying wall configurations and tested using different loading protocols. Good agreement is observed between the EPHM model and the test data. The EPHM is shown to be a better choice of hysteretic model than a static parameter model for performance-based seismic design applications when accurate prediction of displacement throughout the entire deformation demand range is required.
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Acknowledgments
This project was supported by the National Research Initiative of the USDA Cooperative State Research, Education and Extension Service (Grant No. 2005-35103-15250). The writers wish to thank Dr. Rakesh Gupta at Oregon State University, and Dr. Thomas Skaggs and Mr. Zeno Martin at APA-The Engineered Wood Association for providing shear wall test data.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 8 • August 2007
Pages: 1118 - 1129
Copyright
© 2007 ASCE.
History
Received: Sep 11, 2006
Accepted: Jan 16, 2007
Published online: Aug 1, 2007
Published in print: Aug 2007
Notes
Note. Associate Editor: Rakesh Gupta
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