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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Keywords Residual drifts, Seismic effects, Self-centering systems, Steel frames
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Journal Journal of Structural Engineering (United States)
Erochko, J, Christopoulos, C. (Constantin), & Tremblay, R. (Robert). (2015). Design and testing of an enhanced-elongation telescoping self-centering energy-dissipative brace. Journal of Structural Engineering (United States), 141(6). doi:10.1061/(ASCE)ST.1943-541X.0001109