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.
作者
罗锟
汪振国
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)
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
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)
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
urban rail transit
continuous pile-board structure
transition
rail longitudinal force
girder-rail interaction
