作　　者： ; ; ; ; ;

机构地区： 同济大学

出　　处： 《土木工程学报》 2010年第S2期217-223,共7页

摘　　要： 梁式桥在强震作用下的梁间碰撞、落梁乃至倒塌往往与支座破坏的状态紧密相关。在一些桥梁的地震反应分析中,若不考虑支座破坏的影响,往往会造成结构分析上的错误和设计上的不合理。从支座的震害现象入手,分析支座的震害特点,并在此基础上提出用于桥梁整体地震反应分析中,常用支座考虑破坏过程的恢复力模型。通过对一座6跨连续梁桥的地震反应的数值模拟,对比分析考虑支座破坏与否对桥梁主梁位移和桥墩抗力的影响并验证所提模型的合理性。 The impact between girders,unseating and even collapse of girder bridges under strong earthquake motion always closely related to the state of bearing damage.In some earthquake response analysis of bridge,if we do not take account of bearing failure,the error of structural analysis and the unreasonable in design will be made.This paper firstly summarizes the earthquake damage of bearing,then category the damage modes by the characteristics of the current common bearing.On this basis,the restoring force model of bearing taking account of failure is proposed for earthquake response analysis of whole bridge.By the numerical simulation of earthquake response for a 6-span continuous bridge,the influences of failure of bearings on the displacement of girder and the endurance of pier are analyzed,and the rationality of the proposed model is tested.

关 键 词： 支座破坏 恢复力模型 地震反应分析 桥梁震害

领　　域： [建筑科学] [交通运输工程]