An Experimental Study on a Reinforced Concrete Frame Retrofitted with Buckling-restrained Brace and Steel Caging
A seismic retrofit scheme, which utilizes buckling-restrained brace (BRB) to enhance lateral strength, stiffness and overall energy dissipation capacity of the RC frame and steel caging to further improve flexural and shear strength of the deficient columns, for seismically-weak RC frame is proposed.To begin with, two half-scale one story, single bay reinforced concrete (RC) bare frames were fabricated.After that, one of the frames was retrofitted with the proposed seismic retrofit technique.At last, cyclic tests on two frames were performed to evaluate the effectiveness of the proposed seismic retrofit technique.The seismic behaviors of the BRB, the gussets and steel caging in the RC frame were also studied.Moreover, the effects of BRB and steel caging on seismic performance of the RC frame were investigated.The test results showed that the pro posed seismic retrofit technique was effective and reliable.The BRB, the gussets and the steel cages per formed very well before specimens failure.The BRB significantly increased lateral force and energy dissipa tion capacity of the retrofitted frame.Steel caging effectively changed failure mechanism of the RC frame.
Jiaguang Zhang Bin Wu Yang Mei
School of Civil Engineering, Harbin Institute of Technology, Harbin, China
国际会议
哈尔滨
英文
311-317
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）