城市轨道交通连续桩板结构上无缝线路纵向力分析  

Longitudinal force analysis of continuously welded rail on continuous pile-board structure in urban rail transit

作　　者：罗锟[1] 汪振国[1,2] 雷晓燕 LUO Kun;WANG Zhenguo;LEI Xiaoyan(Engineering Research Center of Railway Environment Vibration and Noise,Ministry of Education,East China Jiaotong University,Nanchang 330013,China;Nanchang Railway Reconnaissance&Design Institute Co.,Ltd,Nanchang 330026,China)

机构地区：[1]华东交通大学铁路环境振动与噪声教育部工程研究中心,江西南昌330013 [2]南昌铁路勘测设计院有限责任公司,江西南昌330026

出　　处：《铁道科学与工程学报》2019年第11期2692-2698,共7页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51868023);江西省教育厅科技项目(GJJ170357)

摘　　要：连续桩板结构与无缝线路间的梁轨相互作用规律复杂,为研究该结构上无缝线路的纵向力规律,以福州地铁6号线某一连续桩板结构过渡段为工程背景,运用梁轨相互作用原理,建立此过渡段梁轨相互作用有限元模型,进而分析该过渡段上无缝线路纵向力规律。研究结果表明:钢轨制动力受桥梁跨数,结构纵向刚度以及制动荷载位置的影响较大;简支梁桥上列车制动时,应以制挠力为分析指标;桩板结构上列车制动时,可以制动力为主要分析指标。桩板结构上钢轨伸缩力呈对称分布,且远大于简支梁桥上的钢轨伸缩力;增设变形缝能显著减小桩板结构上的钢轨伸缩力。对于长距离连续桩板结构,可在结构中点处设置钢轨伸缩调节器;钢轨断缝值受桩板结构温降影响显著,两者呈线性变化。The law of girder-rail interaction between continuous pile-board structure and continuously welded rail(CWR)is complex.In order to study the longitudinal force regulations of CWR on continuous Pile-board structure,the transition of continuous pile-board structure in Fuzhou Metro Line 6 was taken as an engineering background,a finite element model of girder-rail interaction for the transition of continuous pile-board structure was established by using the principle of girder-rail interaction,and Longitudinal force regulations of CWR on this structure was analyzed.The results show that:The braking force of rail is greatly influenced by the span number of bridge,longitudinal stiffness of structure and location of braking load;when braking a train on a simply supported beam bridge,the braking and bending forces should be taken as the analysis index,and when braking a train on a pile-board structure,the braking force should be taken as the main analysis index;The rail expansion force on the pile-board structure is symmetrical,and much larger than that on the simply supported beam bridge;adding deformation joints can significantly reduce the rail expansion force on the pile-board structure;For longdistance continuous pile-board structure,rail expansion regulator can be set at the mid-point of the structure;rail broken gap is significantly affected by the temperature drop of the pile-board structure,and the two changes linearly.

关 键 词：城市轨道交通 连续桩板结构 过渡段 钢轨纵向力 梁轨相互作用 

分 类 号：U213.9[交通运输工程—道路与铁道工程] U443.312[建筑科学—桥梁与隧道工程]