Numerical Retrofit Study of Light-Frame Wood Buildings Using Shape Memory Alloy Devices as Seismic Response Modification Devices
Publication: Journal of Structural Engineering
Volume 140, Issue 7
Abstract
Woodframe buildings have historically performed well during earthquakes primarily because of their high strength/stiffness to weight ratio. Even still, these structures possess the potential for significant damage and even collapse when exposed to very large earthquakes. New design techniques and advanced technologies can provide an alternative for improved building performance. The use of dampers and other seismic response modification devices is one such method being explored in earthquake engineering. In this paper, shape memory alloy (SMA) devices are investigated for the response modification of light-frame wood buildings during strong earthquakes. A numerical model for a suite of SMA wood shearwalls is developed based on existing data. The numerical models of the shearwalls are examined using incremental dynamic analysis at the single wall level. Design charts are developed for the shearwall models for a range of seismic weights and targeted performance levels. The wall database is then used to demonstrate retrofit of a four-story apartment building. The interstory drift was reduced by over 55% when SMA devices are used for response modification of the four-story apartment building.
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Acknowledgments
This study is supported by the National Science Foundation under Grant No. 23487 and is a supplemental project to the NEES-Soft project. J. W. L. acknowledges support from the Garry Neil Drummond Endowed Chair fund at the University of Alabama and the George T. Abell Professorship funds at Colorado State University.
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Information
Published In
Journal of Structural Engineering
Volume 140 • Issue 7 • July 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Dec 28, 2012
Accepted: Sep 18, 2013
Published online: Apr 1, 2014
Published in print: Jul 1, 2014
Discussion open until: Sep 1, 2014
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