混凝土桥面轨道纵向位移阻力的研究  

Investigation of Resistance to Longitudinal Displacement of Track on Concrete Bridge Decks

作　　者：杨梦蛟[1] 

机构地区：[1]铁道部科学研究院,北京100081

出　　处：《中国铁道科学》2001年第6期91-94,共4页China Railway Science

摘　　要：对桥上无缝线路 ,梁轨之间存在由相对位移引起的轨道纵向位移阻力 ,使桥梁与轨道形成一个相互作用、相互约束的力学平衡体系 ,因此 ,轨道纵向位移阻力是分析无缝线路钢轨和桥梁受力的重要参数。由于道床的散粒体特性以及现场测试条件的限制 ,国内外在这方面的试验研究较少。轨道纵向位移阻力与梁轨相对位移和轨道竖向受载的关系 ,可采用梁体与钢轨之间产生一系列的相对位移、并测定钢轨的受力大小来确定。本文通过室内模拟试验 ,介绍了轨道纵向位移阻力的试验分析结果。轨道纵向位移阻力是分析无缝线路钢轨和桥梁受力的重要参数。本文通过两个 1∶4缩尺室内模拟结构试验 。Owing to the interaction between continuous welded rails and concrete deck of bridge, there generate the rail longitudinal resistance of displacement by relative motion of rails and concrete decks. Mechanics balance system is formed, and it is interaction and inter restraining. Rail longitudinal resistance of displacement is an importance parameter for the analyses of interaction between continuous welded rails and concrete bridge deck. The ballasting characteristic, due to the difficulty of doing site investigation, is not studied much both in China and foreign countries. The relation between the track longitudinal displacement resistance, the bridge corresponding displacement and the vertical load on track can be determined by a series of relative displacements between the girder and the rail and the measured forces. The paper introduces with the in house test the test and analysis results of the track longitudinal displacement resistance. This is an important parameter for the analysis the loading of c w r rails and bridges. This paper presents the result of the laboratory simulating test investigation with a scale of the model 1∶4.

关 键 词：桥梁 无缝线路 混凝土桥面 轨道 纵向位移阻力 相互作用 室内模拟试验 

分 类 号：U441.7[建筑科学—桥梁与隧道工程] U446.1[交通运输工程—道路与铁道工程]