小半径曲线地段桥上无缝线路伸缩力分析  

Analysis of expansion force of CWR on bridge in curved section with small radius

作　　者：许晨霄 李怡涵 李一悦 袁帅 程卓亮 Xu Chenxiao;Li Yihan;Li Yiyue;Yuan Shuai;Cheng Zhuoliang(Xi’an Public Works Section,China Railway Xi’an Bureau Group Co.,Ltd.,Xi’an 710000,China)

机构地区：[1]中国铁路西安局集团有限公司西安工务段,陕西西安710000

出　　处：《山西建筑》2023年第1期153-156,171,共5页Shanxi Architecture

摘　　要：为研究温度荷载作用下小半径曲线地段桥上无砟轨道无缝线路的受力与变形及其分布规律,以多跨简支梁桥和大跨度连续梁桥为研究对象,基于梁-板-轨相互作用原理和有限元法,建立空间实体精细化有限元计算模型,分析了轨温变化幅度和曲线半径对无缝线路力学特性的影响,研究结论可为小半径曲线地段桥上无缝线路的设计和养护维修提供参考。In order to study the stress, deformation and distribution of jointless track on long-span continuous girder bridge in small radius curve section under temperature load, the multi-span simply supported beam bridges and long-span continuous beam bridges are taken as the research objects. Based on beam-slab-rail interaction principle and finite element method, a refined finite element calculation model of spatial entity is established, and the influence of rail temperature variation amplitude and curve radius on the mechanical characteristics of jointless track is analyzed. The research conclusions can provide reference for the design, maintenance and repair of jointless track on bridge in small radius curve section.

关 键 词：小半径曲线 桥上无缝线路 温度荷载 力学特性 

分 类 号：TU997[建筑科学—市政工程]