Shake Table Testing of a Superelastic Shape Memory Alloy Response Modification Device in a Wood Shearwall
Publication: Journal of Structural Engineering
Volume 134, Issue 8
Abstract
Wood frame structures represent the vast majority of the housing stock in North America. These structures rely primarily on wood shear walls to resist seismic loads, and exhibit highly nonlinear behavior at relatively low loadings, which dissipates a large amount of energy. However, the highly nonlinear behavior also results in larger deformations and resulting structural and nonstructural damage. Supplemental energy dissipating devices have shown the potential to greatly reduce the amount of damage to wood frame structures during earthquakes. Numerous such devices have been developed using friction, viscoelastic, hysteretic, and fluid viscous dampers. This paper presents the results of a research study to design and test a supplemental energy dissipating device based on a superelastic shape memory alloy (SMA) in a full-scale wood shear wall on an earthquake shake table. SMA’s have never been applied for use as seismic protection in wood shear walls. The results from these shake table tests were compared to that for a regular wood shear wall subjected to the same suite of ground motions. The superelastic SMA-based device was found to significantly reduce the wood shear wall displacement, which in turn effectively eliminated damage to the wood shear wall with the device installed.
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Acknowledgments
The writers would like to acknowledge Mr. Tom Pyzik of the Memry Corporation and Mr. Frank Sczerzenie of the Special Metals Corporation who generously donated the alloy used in this study. Thanks are due also to Dr. Jason McCormick for his discussion related to residual deformations in the SMA, and to the anonymous reviewers for their helpful comments during that process.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 134 • Issue 8 • August 2008
Pages: 1343 - 1352
Copyright
© 2008 ASCE.
History
Received: Jul 19, 2007
Accepted: Feb 1, 2008
Published online: Aug 1, 2008
Published in print: Aug 2008
Notes
Note. Associate Editor: Vinay Kumar Gupta
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