考虑支座及挡块力学性能退化的桥梁横向地震响应分析  

Transverse seismic response analysis for bridges considering performance degradation of bearings and stoppers

作　　者：吴刚[1,2] 王全录 王克海[1,2] 张盼盼 WU Gang;WANG Quanlu;WANG Kehai;ZHANG Panpan(School of Transportation,Southeast University, Nanjing 2 1 0 0 9 6, China;Research Institute of Highway, Ministry of Transportation,Beijing 100088, China;Inner Mongolia Traffic Design and Research Institute Co. ,Ltd, Huhehaote010010, China)

机构地区：[1]东南大学交通学院,南京210096 [2]交通运输部公路科学研究院,北京100088 [3]内蒙古交通设计研究院有限责任公司,内蒙古自治区呼和浩特010010

出　　处：《振动与冲击》2018年第2期189-196,共8页Journal of Vibration and Shock

基　　金：科技部国际科技合作项目(2009DFA82480);交通运输部西部交通建设科技项目(2009318223094);交通运输部公路工程行业标准项目(JTG-C-201012);内蒙古自治区交通科技项目(NJ-2014-20)

摘　　要：板式橡胶支座的摩擦滑移特性及横向挡块力学性能是影响中小跨径梁桥横向抗震性能评价的重要因素。通过循环水平加载试验,考虑橡胶材料、竖向压应力及加载速率等参数,探讨了板式橡胶支座摩擦滑移特性及滑移后力学性能;在此基础上,对一座三跨预应力混凝土连续梁桥模型进行动力增量分析,分析了板式橡胶支座的滑移损伤及挡块力学性能退化对横桥向地震响应的影响。结果表明:循环水平荷载作用下的板式橡胶支座会因摩擦滑移而发生一定损伤,不同影响因素下损伤情况不同,但其摩擦滑移特性均会逐渐趋于稳定;板式橡胶支座摩擦滑移损伤及挡块的力学性能退化对横桥向地震响应影响较大,且其相互影响,在中小跨径梁桥抗震分析中应同时考虑。The friction sliding feature of laminated rubber bearings and the mechanical performance of stoppershave significant influences on the transverse aseismic ability evaluation of medium - small span bridtest was conducted to investigate the friction sliding feature and the mechanical perfafter sliding, the effects of relevant parameters,such a s, vertical compressive stress,loading rate and rubber material wereconsidered. The FE model of a three-span prestressed concrete continuous beambridge was built and its transverse seismicresponses were studied with the incremental dynamic analysis method considering performance degradation stoppers. The results showed that laminated rubber bearings have a certain damage due to action of horizontal cyclic loads; their damage levels are different under different affecting factors,but their friction slidingfeature can tend to a stable state gradually; friction sliding damage of bearings and stoppers ＋ performance degradation havesignificant influences on the transverse seismic responses of bridges, they interact each other,so the performancedegradation of bearings and stoppers should be considered in aseismic analysis of medium-small span

关 键 词：板式橡胶支座 挡块 抗震分析 循环加载试验 有限元分析 力学性能退化 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]