新型双阶屈曲约束支撑性能有限元分析研究  

New Double-stage Yield Buckling-restrained Brace Simulation Analysis Research

作　　者：龚晨 张清裕 吴从晓[3,4] GONG Chen;ZHANG Qing-yu;WU Cong-xiao(Guangzhou Architectural Engineering Design Institute Co.,Ltd.,Guangzhou 510030;Guangzhou Construction Co.,Ltd.,Guangzhou 510030;Guangzhou University,Guangzhou 510006;Guangzhou Institute of Science and Technology,Guangzhou 510000)

机构地区：[1]广州市建工设计院有限公司,广州510030 [2]广州建筑股份有限公司,广州510030 [3]广州大学,广州510006 [4]广州理工学院,广州510000

出　　处：《广州建筑》2024年第1期13-16,共4页GUANGZHOU ARCHITECTURE

基　　金：广州市建筑集团有限公司科技计划项目(2019-KJ021、2021-KJ044)

摘　　要：针对目前常见的屈曲约束支撑多为单阶屈服,且屈服点单一的问题,提出了一种新型双阶屈曲约束支撑,其核心单元由1块低屈服点芯板和2块高屈服点芯板并联而成,具有屈服点低、在不同地震荷载作用下屈曲约束支撑都能屈服耗能等优点。采用abaqus通用有限元分析软件进行模拟仿真分析设计了新型双阶屈曲约束支撑,采用abaqus接触中的生死单元模拟核心单元多阶失效的工况,分析了其耗能性能、骨架曲线、刚度等重要力学参数,并将分析结果与普通单阶屈曲约束支撑进行对比。结果表明:有限元模拟滞回曲线与试验数据贴合较好,有限元模型设计和参数设定是合理的,该屈曲约束支撑的屈服位移较小,在小位移荷载作用下具有更优越的耗能性能,能在小震荷载作用时为结构耗散更多的地震能量,同时具有更大的屈服后刚度,能为支撑提供更大的反力。For the common buckling restraint brace is mostly single-order yielding,and the yield point is single,a new double-order buckling restraint brace is proposed,whose core unit consists of one low yield point core plate and two high yield point core plates in parallel,with the advantages of low yield point,and the buckling restraint brace can yield and dissipate energy under different seismic loads.The new double-order buckling restrained brace was designed by simulating and analyzing with abaqus general finite element analysis software.The working conditions of multi-orderfailure of the core unit were simulated by using the raw and dead units in abaqus contact,and its energy dissipation performance,skeleton curve,stiffness and other important mechanical parameters were analyzed,and the analysis results were compared with the common single-order buckling restrained brace.The results show that the hysteresis curve of the finite element simulation fits well with the test data,the finite element model design and parameter setting are reasonable,the yielding displacement of the flexural restrained brace is smaller,and it has superior energy dissipation performance under small displacement load,which can dissipate more seismic energy for the structure under small seismic load,and it has greater post-yielding stiffness,which can provide greater reaction force for the brace.

关 键 词：屈曲约束支撑 双阶屈服 抗震性能 仿真分析 

分 类 号：TU924[建筑科学—建筑设计及理论]