LRB-DSB三维隔震系统的隔震效果分析  

Analysis of LRB-DSB Three Dimensional Isolation System's Isolating Effect

作　　者：郭阳照[1,2] 潘毅[1,3] 吴体 李静文[2] 王子超[1] Guo Yangzhao;Pan Yi;Wu Ti;Li Jingwen;Wang Zichao(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Siehuan Institute of Building Re-search,Chengdu 610081,China;Key Laboratory of Seismic Engineering of Siehuan Province,Chengdu 610031,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]四川省建筑科学研究院,四川成都610081 [3]抗震工程技术四川省重点实验室,四川成都610031

出　　处：《西南交通大学学报》2018年第6期1195-1204,共10页Journal of Southwest Jiaotong University

基　　金：国家重点研发计划资助项目(2016YFC0802205);四川省科技支撑计划资助项目(2014SZ0110;2016FZ0014)

摘　　要：为研究叠层橡胶支座-碟形弹簧支座(LRB-DSB)串联组合式三维隔震系统的隔震效果,对LRB-DSB三维隔震系统之构成、原理和设计理论进行综合分析;结合算例,运用整体结构法对基于LRB-DSB的三维隔震结构、基于LRB的水平隔震结构和非隔震结构的动力特性及其在三维地震激励下的动力响应进行对比.结果表明:LRB-DSB三维隔震系统的竖向刚度较LRB水平隔震系统适当降低,基于LRB-DSB的三维隔震结构的竖向自振周期可较基于LRB的水平隔震结构和非隔震结构延长1.2倍;基于LRB-DSB的三维隔震结构在水平向和竖向均能起到良好的隔震效果,弥补了基于LRB的隔震结构仅能起到水平隔震效能的不足.In order to study the isolating effect of the three dimensional laminated rubber bearings-dish springbearing （LRB-DSB） isolation system, comprehensive analyses for its construction, mechanism, and designtheory were performed. On the basis of these analyses, comparative studies of the vibration characteristics and thedynamic response under three dimensional seismic excitation of the three dimensional base of the isolatedstructure based on LRB-DSB, horizontal isolation structure based on the LRB, and general seismic structure wereconducted. The results showed that, in comparison with the LRB horizontal isolation system, the verticalstiffnesses of the three dimensional LRB-DSB isolation systems are properly descended, and the verticalvibration period can be extended by 120%. The LRB isolation system demonstrates good horizontal isolationcapacity, but has no vertical isolation effect; it may even amplify any vertical seismic action on the structure. Thethree dimensional LRB-DSB isolation system can suitably make up for these deficiencies by isolating both thehorizontal and vertical effects well.

关 键 词：三维隔震 叠层橡胶支座 碟形弹簧支座 地震响应 

分 类 号：TU352.12[建筑科学—结构工程]