Finite element analysis of an all-steel buckling-restrained brace  

作　　者：Jiang Tao Dai Junwu Yang Yongqiang Bai Wen Pang Hui Liu Rongheng 

机构地区：[1]Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,ChinaEarthquake Administration,Harbin 150080,China [2]Key Laboratory of Earthquake Disaster Mitigation,Ministry of Emergency Management,Harbin 150080,China

出　　处：《Earthquake Engineering and Engineering Vibration》2022年第4期1119-1135,共17页地震工程与工程振动（英文刊）

基　　金：Research Fund of Institute of Engineering Mechanics,China Earthquake Administration under Grant No.2019A03。

摘　　要：Typical all-steel buckling-restrained braces(BRBs)usually exhibit obvious local buckling,which is attributed to the lack of longitudinal restraint to the rectangle core plate.To address this issue,all-steel BRBs are proposed,in which two T-shaped steel plates are adopted as the minor restraint elements to restrain the core plate instead of infilled concrete or mortar.In order to investigate the factors that characterize the hysterical responses of this device,different finite element(FE)models are developed for the specific context.The FE models are developed based on nonlinear finite element software,which incorporate continuum(shell or brick)elements,large displacement,and deformation formulations.In these FE models,two different steel constitutive models are adopted to precisely reproduce the cyclic response of the BRB component.Meanwhile,comparisons between the numerical and experimental results are conducted to validate the effectiveness and accuracy of the robust FE model.The agreements between experimental observations and numerical predictions demonstrate that the FE method could be utilized for in depth parametric analysis.Furthermore,BRBs with detailed configurations can provide excellent hysteretic behavior and seismic performance through the optimal design process.

关 键 词：steel BRB T-shaped steel finite element model optimal design hysteretic behavior 

分 类 号：TU391[建筑科学—结构工程]