不规则框架结构的组合隔震反应分析  

Response analysis of the combined isolation of irregular frame structure

作　　者：肖明葵[1] 郑猛[1] 昌继胜[1] 张继丁[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《地震工程与工程振动》2012年第4期174-181,共8页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目:强震下高墩大跨桥梁破坏机制及基于性能的减震控制研究(50908245);国家自然科学基金项目;抗震结构位移和滞回耗能性能评估的量化指标研究(50578167)

摘　　要：为研究不规则框架隔震结构的地震反应,分别对一个传统抗震结构、一个铅芯叠层橡胶支座隔震结构和四个组合隔震结构(隔震层由铅芯支座和滑板支座组成)进行了弹塑性地震反应时程分析,研究隔震支座参数对隔震效果的影响。结果表明:采用组合隔震技术时,合理选择隔震层的铅芯支座布置位置、滑板支座的摩擦系数和铅芯叠层橡胶支座的型号,可以有效地降低上部结构的扭转效应;对于不规则的建筑隔震结构,为减小地面运动带来的扭转效应,建议采用由铅芯支座和滑板支座组合而成的隔震层,可对上部结构的扭转起到很好的抑制作用。In order to study the earthquake effect on irregular frame isolated structure,the elasto-plastic earthquake response time-history analyses of a traditional aseismic structure, an isolated structure with an LRB and four combi- natorial isolation structures （the structure whose isolation layer is composed of an LRB and a sliding friction isolating bearing） are made and the influences of the parameter of isolating bearing on the isolation effect are studied. The re- suits indicate that the torsinal response of the upper structure may be efficiently reduced when using the combinato- rial isolation technology by rationally choosing the layout location of the LRB, the coefficient of friction of the slid- ing friction isolating bearing and the model of the LRB for the isolation layer. Consequently, for in＇egular isolation structure with frame, we could efficiently control the torsion of the upper structure by using the isolation layer, which is composed of an LRB and a sliding friction isolating bearing,to reduce the torsional effect exerted by the ground motion.

关 键 词：组合隔震 扭转效应 摩擦系数 滞回耗能 

分 类 号：TU352.1[建筑科学—结构工程] P315.91[天文地球—地震学]