大跨度拱桥温度效应对行车影响的试验研究  

Experimental Study on Influence of Large-span Arch Bridge Temperature Effect on Running Trains

作　　者：魏亚辉[1] WEI Yahui(Railway Science and Technology Research and Development Center,China Academy of Railway Sciences,Beijing 100081, China)

机构地区：[1]中国铁道科学研究院铁道科学技术研究发展中心,北京100081

出　　处：《铁道建筑》2017年第4期1-4,共4页Railway Engineering

摘　　要：以北盘江特大桥为研究对象,采用MIDAS/Civil软件建立有限元模型,计算温度荷载作用下桥面竖向位移,并与成桥后半年时间内随环境温度变化的桥面高程定期量测数据进行对比分析;在沪昆客运专线贵阳西段联调联试过程中,对轨道几何状态、动车组动力学响应、轨道结构和桥梁动力性能等进行测试,依据实测结果分析昼夜温差对动车组行车平稳性的影响。研究结果表明:动车组300~330 km/h运行时的平稳性满足要求,桥梁主跨受温度影响最大,跨中变形-40~60 mm,结构温度变化-7~10.5℃。Taking Beipan river super bridge as research object, the finite element model was established by using MIDAS/Civil software, the vertical displacement of bridge deck under temperature load was calculated and the comparative analysis for the periodic measurement data of ambient temperature and bridge deck elevation variation within half a year after the bridge completion was made. The track geometry parameters, dynamic response of EMU, track structure and bridge dynamic performance were tested by combing with the joint testing and commissioning of gradual accelerating for Guiyang west section in Changsha-Kunming passenger dedicated line, and the influence of temperature difference between day and night on driving stationarity of EMU was analyzed based on the measured results. The research results indicate that EMU stationarity could meet the requirements with running speed of 300 - 330 km/h, the main span of the bridge is most affected by temperature, the mid-span deflection is -40 -60 mm, and the structural temperature change is -7 - 10.5 ℃.

关 键 词：高速铁路 温度变形 试验研究 拱桥 动车组 

分 类 号：U446[建筑科学—桥梁与隧道工程]