竖向地震动对滑动摩擦隔震桥梁结构地震反应的影响  

Effect of vertical excitation on the seismic performance of isolated continuous bridges with sliding friction bearing

作　　者：王常峰[1] 陈兴冲[1] 夏修身[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《世界地震工程》2008年第4期36-41,共6页World Earthquake Engineering

基　　金：铁道部科技计划项目(2006G014)

摘　　要：利用接触摩擦单元建立了滑动摩擦隔震桥梁支座在竖向地震动作用下的有限元模型,通过算例讨论了竖向地震动对不同支座摩擦系数和不同刚度(墩径)滑动摩擦隔震桥梁地震反应的影响,初步探讨了竖向地震动的激励方向对分析结果的影响,分析结果表明,竖向地震动对滑动摩擦隔震桥梁结构的地震反应有较大的影响,在竖向地震动较为明显地区的滑动摩擦隔震桥梁结构设计时,应予以考虑。The effect of vertical excitation on seismic performance of isolated continuous bridges with sliding friction bearing was analyzed by use of the contact and friction element,which can take the influence of vertical force at movable supports on the friction force into account.By the analysis of a 6 span bridge,the effect of vertical excitation on bridges which have different parameters such as frictional coefficient and stiffness were analyzed.And the influence of vertical excitation direction on the results...

关 键 词：竖向地震动 滑动摩擦支座 摩擦 抗震分析 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]