新型屈曲约束支撑钢框架体系耗能有限元分析  

Finite Element Analysis of Energy Dissipation of New Buckling Constrained Braced Steel Frame System

作　　者：蔡天元 杨艳敏[1] 谢晓娟[2] 王鹏[1] 孟祥琨 熊瑛 CAI Tianyuan;YANG Yanmin;XIE Xiaojuan;WANG Peng;MENG Xiangkun;XIONG Ying(School of Civil Engineering,Jilin Jianzhu University,Changchun Jilin 130118,China;Jilin Research and Design Institute of Building Science,Changchun Jilin 130011,China)

机构地区：[1]吉林建筑大学土木工程学院,吉林长春130118 [2]吉林省建筑科学研究设计院,吉林长春130011

出　　处：《北方建筑》2021年第1期13-17,21,共6页Northern Architecture

基　　金：吉林省科技厅重点研发项目(20200403071SF);国家应急管理部安全事故防治科技项目(jilin-0001-2018AQ)。

摘　　要：本文提出一种新型切削十字型屈曲约束支撑,采用角钢切削工艺,并用焊接方式将2根角钢对焊成核心单元。通过运用SAP2000有限元软件对新型屈曲约束支撑钢框架与未设支撑钢框架进行多遇地震下时程分析,包括结构层间位移角、顶点位移、顶点加速度对比分析,探究新型屈曲约束支撑对钢框架抗震性能的影响。结果表明:新型支撑钢框架结构顶点位移与顶点加速度较未设支撑钢框架结构减小35.8%和43.7%。说明新型屈曲约束支撑耗能、减震作用明显,能有效提高钢框架抗震性能。In this paper,a new type of cross-cutting buckling restrained brace is presented,which angle steel is cut and two angle steels are welded into a core unit.Here is a time-history analysis under multiple earthquakes when has the new type of buckling restrained braced steel frame and without it through the SAP2000 finite element software,including the contract analysis of inter story displacement angle of structure,vertex displacement and vertex acceleration,so as to explore the influence of new buckling restrained braced for the seismic performance of the steel frame.The results show that the vertex displacement and vertex acceleration of the new braced steel frame structure are 35.8%and 43.7%lower than those without braced steel frame structure.The results show that the energy dissipation and shock absorption of the new buckling restrained brace are effective and can improve the seismic performance of steel frame effectively.

关 键 词：新型屈曲约束支撑 时程分析 层间位移角 顶点位移 顶点加速度 

分 类 号：TU391[建筑科学—结构工程]