双向地震作用下自复位屈曲约束支撑框架性能研究  

PERFORMANCE STUDY OF SELF-CENTERING BUCKLING-RESTRAINED BRACE FRAME UNDER BIDIRECTIONAL SEISMIC ACTION

作　　者：张会[1] 曾鹏[2] 王春林[3] ZHANG Hui;ZENG Peng;WANG Chunlin(School of Architecture and Civil Engineering,Jinken College of Technology,Nanjing 211156,China;East China Electric Power Design Institute Co.,Ltd.,Shanghai 200063,China;Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education,Southeast University,Nanjing 210096,China)

机构地区：[1]金肯职业技术学院建筑与土木工程学院,南京211156 [2]华东电力设计院有限公司,上海200063 [3]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096

出　　处：《工业建筑》2019年第6期163-166,191,共5页Industrial Construction

基　　金：国家自然科学基金面上项目(51678138);江苏省高校自然科学研究面上项目(2016KJB560022);江苏高校青蓝工程项目;江苏省高等职业院校教师专业带头人高端研修项目;江苏高校品牌专业工程一期项目共同资助

摘　　要：为研究双向地震作用下自复位屈曲约束支撑(SCBRB)框架的性能,依据屈曲约束支撑(BRB)框架振动台试验数据建立并验证了BRB框架数值模型,在此基础上依据“等强原则”建立了SCBRB框架的数值模型,并通过输入双向地震作用分析了不同构件参数对SCBRB框架抗震性能的影响。数值结果表明:由于自复位系统的刚度贡献,SCBRB框架的变形能力能够满足变形需求,SCBRB框架相比BRB框架更能减小结构在地震中的最大位移响应,将结构的残余变形控制在很小的范围内;相比BRB框架,SCBRB框架的楼层加速度和剪力均增大,但增加的剪力主要由支撑承担,框架主体承担的水平作用反而减小。To investigate the performance of self-centering buckling-restrained brace (SCBRB) under bidirectional seismic action,a numerical BRB frame was established and verified by shaking table test results. Then a numerical SCBRB frame was established based on the principle of equal strength. The influences of different parameters on the seismic behavior of SCBRB frame were analyzed under bidirectional seismic action. The test results showed that the deformation capacity of SCBRB satisfied the demand with the stiffness provided by the self - centering system. Compared with BRB frame,the SCBRB frame could decrease the maximum displacement response of the structure under earthquakes,and the residual deformation of the structure was also controlled well. The floor acceleration and shear force of SCBRB frame was larger than that of BRB frame. However,the increased shear force was mainly undertaken by the brace while the horizontal action undertaken by the main frame was decreased.

关 键 词：自复位屈曲约束支撑 抗震性能 预应力筋 残余变形 

分 类 号：TU352.11[建筑科学—结构工程]