Earthquake and Postearthquake Fire Testing of a Midrise Cold-Formed Steel-Framed Building. II: Shear Wall Behavior and Design Implications
Publication: Journal of Structural Engineering
Volume 147, Issue 9
Abstract
Complementing a companion paper that summarizes the building global response and physical damage of a midrise cold-formed steel (CFS) framed building during an earthquake and postearthquake fire test program, this paper focuses on understanding the seismic behavior of the shear walls utilized in the building system during this test program. In contrast to shear walls tested in an isolated configuration, the shear walls within the full-scale test building were constructed and tested under real-world kinematic constraints and dynamic loading environments. The shear walls located at various planar and vertical locations of the test building were instrumented with a dense array of analog sensors to monitor the shear wall local responses. In this study, the shear wall local responses are correlated with the global responses of the building to advance understanding regarding the behavioral characteristics of individual shear walls and in particular the interactions of the shear walls as part of the lateral-load-resisting system. Important seismic design parameters are inferred from the measured building response using a parameter optimization strategy. Their implications associated with the seismic design of CFS wall-framed structural systems are discussed in relation to code provisions and design guidelines.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon request.
Acknowledgments
This research project is a collaboration between two academic institutions (University of California, San Diego, and Worcester Polytechnic Institute), two government or institutional granting agencies (Department of Housing and Urban Development and the California Seismic Safety Commission) and more than 15 industry partners. The Jacobs School of Engineering and Department of Structural Engineering at UCSD also provided matching support for this effort. Although UCSD led the overall test program with their primary focus on the earthquake test phases, the authors are grateful to Professor Brian Meacham and Dr. Praveen Kamath (formerly with WPI) for their leading efforts on the fire testing and contribution to the overall test program. The active collaboration with Professor Gilbert Hegemier from UCSD in this test program is also greatly appreciated. Industry sponsors include the California Expanded Metal Products Co. (CEMCO) and Sure-Board, who each provided financial, construction, and materials support. Specific individuals that dedicated significant time on behalf of this effort included Fernando Sesma (CEMCO), Kelly Holcomb, Carleton Elliot, and Tyler Elliot (Sure-Board), Harry Jones (DCI Engineers), Diego Rivera (SWS Panels), Doug Antuma (Rivante), Larry Stevig (State Farm Insurance), Tim Reinhold and Warner Chang (Insurance Institute for Business and Home Safety), Steve Helland (DPR Construction), Rick Calhoun (Walters & Wolf), and Jesse Karnes (MiTek). The authors appreciate the efforts of these individuals and their colleagues at their respective firms. In addition, the NHERI@UCSD staff, namely, Robert Beckley, Jeremy Fitcher, Dan Radulescu, and Alex Sherman, as well as the UCSD graduate student Srikar Gunisetty, provided technical support for the test program. Their efforts are also greatly appreciated.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 9 • September 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Jun 18, 2020
Accepted: Apr 8, 2021
Published online: Jun 28, 2021
Published in print: Sep 1, 2021
Discussion open until: Nov 28, 2021
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