Tests of Buckling-Restrained Braces Using Low-Yield Point Steel as Core Material

Abstract:

In order to reduce seismic responses of structures, low-yield point steel has been used for dampers due to its excellent energy dissipation capacity. However, few researches about the low-yield point steel dampers have been conducted in China so far. This paper mainly presents an experimental study on two buckling-restrained braces (BRBs) which take an in-line steel plate as the core and a double-web wide flange steel member as the outer unit. Low-yield point steel LY100 is taken as the core material and conventional steel SN400 is taken as the outer material. Uniaxial cyclic loading tests of two low-yield point steel BRBs (LYS-BRB) were conducted to investigate their hysteretic behavior and energy dissipation capacity. The two LYS-BRBs yielded at rather small displacement and their accumulated plastic deformation ratios reached 1639 and 1437, respectively. Significant strain-hardening behavior can be observed in the hysteresis curves of LYS-BRBs and the maximum cyclic stress reached 3.85 times the yield stress.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 3159-3165
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.3159
• Online since: May 2012
• Authors: Hong Yan*, Peng Pan, Yuan Qing Wang, Toshio Makino, Xue Qi
• Keywords: Accumulated Plastic Deformation Ratio, Buckling Restrained Brace (BRB), Cyclic Loading, Low-Yield Point Steel, Seismic Performance

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