【摘要】 为了研究在双向地震激励下,考虑土一结构相互作用的LRB隔震梁桥结构体系的反应特性以及不同类型土对其隔震梁桥地震反应峰值的影响.采用集中参数法,给出了双向水平地震激励下考虑SSI的一种时域计算分析隔震桥梁地震反应的方法.并在考虑和忽略SSI时,对一座三跨连续LRB隔震梁桥的地震反应峰值的影响进行了比较分析,结果证实,土-结构相互作用对LRB隔震梁桥结构地震反应与场面类别、断层以及地震动选择等关系密切.更多还原

【Abstract】 In order to investigate the effect of soil-structure interaction(SSI)on the earthquake characteristics,and the foundation pier effect of the soil surrounding on peak response of the continuous girder seismically isolated bridge with lead rubber bearings(LRB)under bi-directional earthquake excitation.An analytical method of earthquake-response is carried out in time domain using complex modal analysi,and the peak responses of a three-span continuous girder seismically isolated bridge are compared with consideration or ignorance of SSI effect.A parametric study is also conducted to investigate the effect of bearing parameters on the response of isolated bridge system.It has important effects of SSI on the earthquake response of continuous girder seismically isolated bridges.更多还原