新型开槽式防屈曲耗能支撑力学模型研究及应用  

Study and application on restoring force model of the notch-type triple-steel-tube buckling-restrained brace(TST-BRB)

作　　者：吴从永[1] 吴从晓[1] 周云[1] 

机构地区：[1]广州大学,广东广州510006

出　　处：《土木工程学报》2010年第S1期397-402,共6页China Civil Engineering Journal

基　　金：广东省自然科学基金团队项目(8351009101000001);广东省自然科学基金(06021581);广东省科技计划项目(2007B030401010)

摘　　要：采用双线性模型模拟新型开槽式防屈曲耗能支撑的滞回性能,在此基础上,应用PERFORM 3D软件对布置新型开槽式防屈曲耗能支撑结构和无支撑结构进行多遇地震和罕遇地震作用下的非线性时程分析,研究结果表明:双线性模型模拟的滞回曲线与试验滞回曲线吻合较好,分析时采用双线性模型模拟阻尼器的滞回性能是可行的;在罕遇地震作用时新型开槽式防屈曲耗能支撑能吸收较多的地震输入结构能量,减小结构构件产生塑性变形,保护主体结构安全。The non-linear hysteretic behavior of notch-type triple-steel-tube buckling-restrained brace(TST-BRB) is modeled adopting the bilinear model.Using PERFORM 3D software,the models of the structure with the notch-type triple-steel-tube buckling-restrained braces and non-brace structure are set up,and nonlinear time history analysis under frequently and rarely occurred earthquake were conducted.The analysis results show that: ①the simulating hysteretic curve with bilinear model matches well with the test results,which indicates that it is feasible to adopt the bilinear model to simulate the damper element when analyzing structure with the TST-BRBs;②the notch-type triple-steel-tube buckling-restrained brace can dissipate a large mount of energy induced by strong earthquake motion,and decrease the plastic deformation of the key structural element to protect the structure.

关 键 词：防屈曲耗能支撑 力学模型 抗震性能 塑性变形 

分 类 号：TU352.1[建筑科学—结构工程]