Experimental and numerical study of buckling-restrained braces configured with out-of-plane eccentricity under cyclic loading  

作　　者：Cao Yongsheng Zhou Yun Takagi Jiro Jiang Ke Deng Xuesong Fang Xiaojun 

机构地区：[1]Earthquake Engineering Research&Test Center,Guangzhou University,Guangzhou 510006,China [2]School of Civil Engineering,Guangzhou University,Guangzhou 510006,China [3]Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology,Guangzhou 510006,China [4]Key Laboratory of Earthquake Resistance,Earthquake Mitigation and Structural Safety,Ministry of Education,Guangzhou 510006,China [5]Graduate School of Urban Environmental Sciences,Tokyo Metropolitan University,Tokyo 192-0397,Japan [6]Department of Civil and Natural Resources Engineering,University of Canterbury,Christchurch CT13AN,New Zealand

出　　处：《Earthquake Engineering and Engineering Vibration》2024年第4期957-971,共15页地震工程与工程振动（英文刊）

基　　金：National Natural Science Foundation of China under Grant No.51978184。

摘　　要：This study focuses on variations in the hysteretic behavior of buckling-restrained braces(BRBs)configured with or without out-of-plane eccentricity under cyclic loading.Quasi-static experiments and numerical simulations were carried out on concentrically and eccentrically loaded BRB specimens to investigate the mechanical properties,energy dissipation performance,stress distribution,and high-order deformation pattern.The experimental and numerical results showed that compared to the concentrically loaded BRBs,the stiffness,yield force,cumulated plastic ductility(CPD)coefficient,equivalent viscous damping coefficient and energy dissipation decreased,and the yield displacement and compression strength adjustment factor increased for the eccentrically loaded BRBs.With the existence of the out-of-plane eccentricity,the initial yield position changes from the yield segment to the junction between the yield segment and transition segment under a tensile load,while the initial high-order buckling pattern changes from a first-order C-shape to a secondorder S-shape under a compressive load.

关 键 词：buckling-restrained brace out-of-plane eccentricity EXPERIMENT numerical simulation mechanical properties 

分 类 号：TU391[建筑科学—结构工程] TU352.11