Experimental Seismic Behavior of a Full-Scale Four-Story Soft-Story Wood-Frame Building with Retrofits. II: Shake Table Test Results
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VIEW THE REPLYPublication: Journal of Structural Engineering
Volume 142, Issue 4
Abstract
Soft-story wood-frame buildings have been recognized as a disaster preparedness problem for decades. The majority of these buildings were constructed from the 1920s to the 1960s and are prone to collapse during moderate to large earthquakes due to a characteristic deficiency in strength and stiffness in their first story. In order to propose and validate retrofit methods for these at-risk buildings, a full-scale four-story soft-story wood-frame building was constructed, retrofitted, and subjected to ground motions of various intensities. The tests were conducted to validate retrofit guidelines proposed in a “Federal Emergency Management Agency’s recent soft-story seismic retrofit guideline for wood buildings” and a performance-based seismic retrofit (PBSR) methodology developed as part of the NEES-Soft project. This paper is the second in a set of companion papers and presents the full-scale shake table test results using the two new approaches. The companion paper to this paper presents the design philosophies, design details, and numerical analysis of the retrofitted building for each of the four retrofits.
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Acknowledgments
This material is based on work supported by the National Science Foundation under Grant No. CMMI-1041631 and 1314957 (NEES Research) and NEES Operations. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the investigators and do not necessarily reflect the views of the National Science Foundation. A sincere thank you to Simpson Strong Tie for their financial, personnel, and product support throughout the project, including the engineering support for the SMF in San Diego. Cash, personnel, or in-kind contributions were provided by the USDA Forest Products Laboratory, Structural Engineers Association of Southern California, Taylor Devices, and Innovative Timber Solutions/Smartwood. The authors kindly acknowledge the other co-principal investigators (Co-PI’s) of the project, Weichiang Pang and Xiaoyun Shao, and other senior personnel of the NEES-Soft project: David V. Rosowsky at University of Vermont, Andre Filiatrault at University at Buffalo, Shiling Pei at South Dakota State University, David Mar at Tipping Mar, and Charles Chadwell at Cal-Poly San Luis Obispo; the other graduate students participating on the project: Ph.D. student Ershad Ziaei (Clemson University) and M.Sc. students Jason Au and Robert McDougal at Cal-Poly Pomona; and the practitioner advisory committee: Laurence Kornfield, Tom Van Dorpe, Doug Thompson, Kelly Cobeen, Janiele Maffei, Douglas Taylor, and Rose Grant. A special thank you to all of the research experience for undergraduate (REU) students: Sandra Gutierrez, Faith Silva, Gabriel Banuelos, Rocky Chen, and Connie Tsui. Others that have helped include Asif Iqbal, Andre Barbosa, Vaishak Gopi, Steve Yang, Ed Santos, Tim Ellis, Omar Amini, Russell Ek, Rakesh Gupta, and Anthonie Kramer. Finally, our sincere thank you to NEES and all site staff and site principal investigator (PI’s) at NEES at UCSD for their assistance in getting the test specimen ready for testing and in conducting the tests.
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Journal of Structural Engineering
Volume 142 • Issue 4 • April 2016
Copyright
© 2014 American Society of Civil Engineers.
History
Received: May 29, 2014
Accepted: Oct 24, 2014
Published online: Dec 9, 2014
Discussion open until: May 9, 2015
Published in print: Apr 1, 2016
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