多联不规则减隔震梁桥过渡墩抗震性能评价  

Seismic performance of transition pier of multi-span irregular continuous girder bridge using seismic mitigation and isolation techniques

作　　者：王昊[1] 魏红一[1] 蒋仕持[1] 王志强[1] 

机构地区：[1]同济大学桥梁工程系,上海200092

出　　处：《福州大学学报（自然科学版）》2013年第4期658-662,共5页Journal of Fuzhou University(Natural Science Edition)

摘　　要：结合一个工程实例,研究多联不规则减隔震桥梁的地震反应及结构易损部位,并针对其地震响应特点,提出几种调整过渡墩引桥部分铅芯橡胶支座参数的方案,以改善桥梁的抗震性能.采用非线性动力时程分析方法,分析比较了各方案的抗震能力.研究结果表明,适当提高支座的屈前刚度和屈后刚度,或选择合适的屈服力,均可以有效改善过渡墩的抗震性能.Cites an engineering instance,to study the seismic response and vulnerability parts of multi-span irregular bridges,and according to their seismic performance characteristics to adjust the lead rubber bearings of approach spans part on the transition pier to improve the seismic performance of the bridge.Using nonlinear time-history analysis compare their seismic capacity.The study results show that an appropriate increase in the initial shear stiffness and post-yield stiffness or choose a suitable yield force can effectively improve the seismic performance of the transition pier.

关 键 词：连续梁桥 过渡墩 抗震性能 铅芯橡胶支座 

分 类 号：U448.215[建筑科学—桥梁与隧道工程]