桥梁铅芯橡胶支座参数的优化设计研究  

Research on the Optimization Design of Lead Rubber Bearing Parameters of Bridges

作　　者：沈国锋[1,2] 林均岐 刘金龙[1] 林庆利[1] Shen Guofeng;Lin Junqi;Liu Jinlong;Lin Qingli(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;Zhongtong Steel Structure Co.,Ltd,Liaocheng 252000,China)

机构地区：[1]中国地震局工程力学研究所,中国地震局地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [2]中通钢构建设股份有限公司,山东聊城252000

出　　处：《防灾科技学院学报》2018年第1期17-24,共8页Journal of Institute of Disaster Prevention

基　　金：国家科技支撑计划课题(2015BAK17B05)

摘　　要：合理选择铅芯橡胶支座的动力参数是减、隔震桥梁充分发挥其减、隔震作用的关键。为便于今后采用减、隔震技术的桥梁更加合理地选用铅芯橡胶支座,建立了多个桥梁工况,以3条人工地震动为地震输入进行非线性时程分析,研究了铅芯橡胶支座的动力参数与桥墩刚度和上部结构质量之间的内在联系,得出了铅芯橡胶支座在不同设计谱峰值、不同桥梁结构下的最优屈服前刚度和屈服力。该研究结果可为后续桥梁的减、隔震设计提供参考。The rational selection of dynamic parameters of the lead rubber bearing(LRB)is the key for bridge to play their role of mitigation and isolation.To select LRB rationally for bridges which adopt seismic mitigation and isolation technology in future,we set up several bridge conditions.Then w,e analyzed nonlinear time history under 3 artificial ground motions,and studied the internal relations between the dynamic parameters of LRB,the stiffness of the pier,and the quality of the superstructure.As a result,the optimum pre-yield stiffness and yield force of LRB at different design spectrum peaks and different bridge structures are obtained,which can provide reference for the mitigation-and-isolation design of subsequent bridges.

关 键 词：铅芯橡胶支座 优化设计 屈服重力比 刚度比 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]