双线铁路简支梁桥的摩擦摆支座适用墩高范围研究  

Research on applicable pier height range of friction pendulum bearing of simply supported bridges in a double line railway

作　　者：陈克坚[1] 李吉林 魏标[3] 王祯伟 李姗姗[5] 贾晓龙 CHEN Kejian;LI Jilin;WEI Biao;WANG Zhenwei;LI Shanshan;JIA Xiaolong(China Railway Eryuan Engineering Group Co.Ltd,Chengdu 610031,China;China State Railway Group Co.Ltd,Beijing 100844,China;School of Civil Engineering,Central South University,Changsha 410075,China;Zhejiang Provincial Institute of Communications Planning,Design&Research,Hangzhou 310006,China;Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031 [2]中国国家铁路集团有限公司,北京100844 [3]中南大学土木工程学院,湖南长沙410075 [4]浙江省交通规划设计研究院,浙江杭州310006 [5]江苏建筑职业技术学院,江苏徐州221116

出　　处：《铁道科学与工程学报》2020年第2期364-371,共8页Journal of Railway Science and Engineering

基　　金：四川省科技计划项目(2019YFG0048);国家自然科学基金资助项目(51778635,51778630);湖南省自然科学基金资助项目(2019JJ40386);江苏省住房和城乡建设厅资助项目(2017ZD012,科2018-81)

摘　　要：针对常用的32 m跨度双线铁路简支梁桥,研究摩擦摆支座在不同墩高情况下的减隔震率,确定适用墩高范围。运用OpenSEES软件,分别建立不同墩高情况下的采用普通支座(即球形钢支座)和摩擦摆支座的铁路简支梁桥有限元模型。对比采用2种不同支座的桥梁在同一地震动输入下的地震响应,确定不同墩高情况下的摩擦摆支座的墩顶位移减隔震率与墩底弯矩减隔震率。研究结果表明:如果要求纵、横向墩顶位移减隔震率大于55%,同时要求纵、横向墩底弯矩减隔震率大于25%,常用双线铁路简支梁桥的适用墩高范围为0~52 m。Aiming at the commonly used 32 m span, double-track, simply-supported railway beam bridges, the vibration reduction and isolation rates of the friction pendulum bearings at different pier heights were studied to determine the applicable pier height range. The OpenSEES software was used to build the finite element models of those bridges, which contain spherical steel bearings(SSB) and FPB, respectively, on piers with different heights. The seismic responses of those bridges, respectively with SSB and FPB, under the same earthquakes were compared with each other to obtain the seismic isolation ratios of displacement on the pier top and moment at the pier bottom for piers with different heights. The results show that FPB can only be used for those bridges with pier heights being less than 52 m, if the seismic isolation ratios of displacement on the pier top are required to be larger than 55% and the seismic isolation ratios of moment at the pier bottom are required to be larger than 25% in the longitudinal direction and in the transverse direction.

关 键 词：双线铁路 简支梁桥 摩擦摆支座 墩高 减隔震 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]