点击次数：

发布时间：2019-03-11

论文类型：会议论文

发表时间：2010-07-25

收录刊物：Scopus、EI

卷号：4

页面范围：2684-2692

摘要：To minimize the residual welding deformation in the steel core with cruciform cross-section of conventional all-steel buckling-restrained braces (BRBs), a novel all-steel BRB, called angle steel BRB (ABRB), has been developed. The steel core of ABRB consists of four angle steels with equal sides to form a non-welding cruciform cross-section as the energy dissipation part. The outer restraint is composed of two angle steels with equal sides welded longitudinally to form a square hollow cross-section. The component test including three ABRB specimens under quasi-static cyclic load was conducted to investigate the effects of the boundary condition, the brace end rotation demand and the constructional details in the steel core segment on the seismic behavior of ABRBs. The test results indicate that the ABRB specimen with rigid connection exhibits superior seismic performance than the others. The local compression-flexure failure occurs at the core projection for the hinge connected specimen without any rotation restraint, but such failure mode can be safely prevented by providing rotation restraint at the brace end. The stopper with the abrupt change of the cross-section in the middle of the steel core induces stress concentration and impair its lowcycle fatigue property. Finally, the seismic performance of the ABRB specimens is analyzed, which shows that the seismic performance parameters of the ABRBs well satisfy the requirement specified by the AISC seismic provision, so the ABRB can serve as an effective passive energy dissipation device for engineering structures.