屈曲约束支撑框架-核心筒混合结构抗震性能  

Seismic Performance Analysis of a Hybrid Frame-Core Tube Structure with Buckling-Restrained Brace

作　　者：李帼昌[1] 王柄捷 杨志坚[1] 徐丽 高祥[1] LI Guochang;WANG Bingjie;YANG Zhijian;XU Li;GAO Xiang(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2018年第4期605-613,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51178276);辽宁省高等学校创新团队项目(LT2014012)

摘　　要：目的研究屈曲约束支撑在超高层混凝土结构中的适用性,分析有无屈曲约束支撑的超高层混凝土结构抗震性能.方法建立屈曲约束支撑框架-核心筒混合结构模型,并采用反应谱分析,静力和动力弹塑性分析对模型进行地震反应分析.结果结果表明:小震作用下,屈曲约束支撑处于弹性状态,可为结构提供弹性刚度,结构基底剪力,层间位移角均有所减小;大震作用下,大部分屈曲约束支撑屈服,可帮助结构耗散地震能量.结论屈曲约束支撑能够和框架-核心筒结构良好的协同工作;合理布置屈曲约束支撑,可提高结构抗扭刚度,增加了核心筒内有效使用面积,结构总质量明显下降,减小了结构地震反应.The seismic behavior of super high-rise concrete structures with or without buckling restrained braces is analyzed,to investigate the application of buckling-restrained brace（BRB） in super high-rise concrete structure,a model of hybrid frame-core tube structure with BRB was established,response spectrum analysis,pushover analysis and time history analysis were used to assess the seismic performance. When subjected to frequent earthquake,the BRBs were in elastic state,and can provide elastic stiffness for the main structure,both the base shear and the inter-story displacement angle have decreased. When subjected to rare earthquake,a number of BRBs were in post-yielding state,and the seismic energy for main structure could be dissipated. The results showed that BRBs could work well with the frame-core tube structure. Reasonable arrangement of buckling restrained braces can improve the torsional stiffness of structures,the use of BRB could increase the effective area of the core tube,decrease the total mass of structure obviously,and reduce the seismic response of structure.

关 键 词：屈曲约束支撑 框架-核心筒 抗震性能 PUSHOVER分析 动力弹塑性分析 

分 类 号：TU973.2[建筑科学—结构工程]