Design and Testing of an Enhanced-Elongation Telescoping Self-Centering Energy-Dissipative Brace
Publication: Journal of Structural Engineering
Volume 141, Issue 6
Abstract
The self-centering energy-dissipative (SCED) brace is a new steel bracing member that provides both damping and recentering capability to a structure, while reducing or eliminating residual building deformations after major seismic events. Previous SCED brace designs exhibited full self-centering capability over frame lateral deformations ranging from 1.5 to 2.0% of a typical building story height owing to the elongation capacity of the tendons comprising the system. To overcome this limitation, a new enhanced-elongation telescoping SCED (T-SCED) brace has been developed that allows for self-centering response over two times the range achieved with the original SCED bracing system. A prototype design of this proposed system was fabricated and tested quasi-statically and dynamically in a full-scale vertical steel frame. It exhibited full self-centering behavior in a single story frame that was laterally deformed to 4% of its story height. This new T-SCED brace also satisfied standard testing protocols for buckling restrained braces.
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Acknowledgments
Financial support for this project was provided by the Natural Sciences and Engineering Research Council of Canada under the Idea to Innovation (I2I) program. The authors would also like to acknowledge the assistance provided by the staff of the structural engineering laboratory at the University of Toronto.
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Published In
Journal of Structural Engineering
Volume 141 • Issue 6 • June 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Apr 10, 2013
Accepted: May 6, 2014
Published online: Aug 6, 2014
Discussion open until: Jan 6, 2015
Published in print: Jun 1, 2015
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