多维地震作用下隔震桥梁地震反应(Ⅰ)--模型结构振动台试验  

SEISMIC RESPONSE OF ISOLATED BRIDGES WITH LRB UNDER MULDI-DIRECTIONAL EARTHQUAKE——PART (Ⅰ) SHAKING TABLE TEST OF BRIDGE MODEL

作　　者：韩强[1] 杜修力[2] 刘晶波[1] 刘文光[3] 

机构地区：[1]清华大学土木工程系,北京100084 [2]北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100022 [3]上海大学土木工程系,上海200072

出　　处：《振动与冲击》2008年第9期59-65,共7页Journal of Vibration and Shock

基　　金：国家杰出青年科学基金资助项目(50325826);国家自然科学基金重大研究计划资助项目(90715032);中国博士后科学基金资助(20080430364)

摘　　要：为了研究多维地震作用下隔震梁桥结构振动特性和隔震效果,隔震支座两水平正交方向力-变形关系以及竖向性能等,对方形铅芯支座隔震连续梁桥结构模型进行了下模拟地震振动台试验。在水平单向、双向及水平双向和竖向同地输入地震波时,对桥梁模型结构桥面和桥墩顶部加速度反应,位移反应,以及隔震支座两水平正交方向力-变形关系和竖向力反应等进行了相关研究,得出若干对桥梁隔震设计有价值的结论。In order to investigate isolator properties, vibration properties and isolated effect of continuous girder isolated bridges with lead rubber bearings (LRB) under multi-directional excitation, the simulated earthquake tests of a seismically isolated bridge model consisting of multi-span continuous deck are carried out on a shaking table under multi-directional earthquake input. The acceleration and displacement response trend of the deck and the pier-cap of the isolated bridge, and vertical force and horizontal force-deformation restoring force relationship of LRB are studied under unidirectional, bi-directional, and multi-directional earthquake input. Some reasonable and valuable conclusions are obtained for design of continuous girder isolated bridges.

关 键 词：隔震桥梁 隔震效果 振动台试验 铅芯橡胶支座 多维地震 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]