| 桥上纵连板式无砟轨道无缝线路力学性能分析 |
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| 引用本文： | 蔡小培,高亮,孙汉武,曲村.桥上纵连板式无砟轨道无缝线路力学性能分析[J].中国铁道科学,2011,32(6). |
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| 作者姓名： | 蔡小培 高亮 孙汉武 曲村 |
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| 作者单位： | 1. 北京交通大学土木建筑工程学院,北京,100044
2. 铁道部安全监察司,北京,100844 |
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| 基金项目： | 铁道部科技研究开发计划项目，中央高校基本科研业务费专项资金资助项目 |
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| 摘 要： | 基于有限元法,考虑钢轨、无砟道床、滑动层、桥梁等结构的相互作用关系,建立桥上纵连板式无砟轨道无缝线路纵-横-垂向空间耦合模型,进行滑动层摩擦系数、扣件纵向阻力、无砟道床伸缩刚度等对桥上纵连板式无砟轨道无缝线路的受力和变形影响规律的研究.结果表明:滑动层减弱了桥梁、轨道间的相互作用,当滑动层摩擦系数为0.1～0.5时,无缝线路伸缩力仅为22.821～55.361 kN,远小于一般桥上无缝线路结构；滑动层摩擦系数越小越有利于轨道和桥梁结构的安全使用；底座板/轨道板的伸缩刚度减小会明显增大部分轨道和桥梁的受力,伸缩刚度折减至10％时,伸缩力会增大近6倍,因此应该注意控制底座板和轨道板的开裂现象；扣件的纵向阻力变化对轨道和桥梁结构的受力和变形几乎没有影响,但为了防止钢轨爬行或断缝值超限,扣件阻力不宜太小.
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| 关 键 词： | 无砟轨道 无缝线路 长大桥梁 纵连板 滑动层摩擦系数 扣件纵向阻力 伸缩力 |
Analysis on the Mechanical Properties of Longitudinally Connected Ballastless Track Continuously Welded Rail on Bridge |
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| CAI Xiaopei,GAO Liang,SUN Hanwu,QU Cun.Analysis on the Mechanical Properties of Longitudinally Connected Ballastless Track Continuously Welded Rail on Bridge[J].China Railway Science,2011,32(6). |
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| Authors: | CAI Xiaopei GAO Liang SUN Hanwu QU Cun |
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| Institution: | CAI Xiaopei1,GAO Liang1,SUN Hanwu2,QU Cun1(1.School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China,2.Department of Safety and Supervision,Ministry of Railways,Beijing 100844,China) |
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| Abstract: | Based on finite element method,considering the interaction between the rail,ballastless track bed,sliding layer and bridge,the longitudinal-transverse-vertical spatial coupled model of longitudinally connected ballastless track continuously welded rail on bridge is established.The influence law of the sliding layer friction factor,fastener longitudinal resistance and expansion stiffness of ballastless track bed on the force and deformation of the longitudinally connected ballastless track continuously welde... |
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| Keywords: | Ballastless track Continuously welded rail Long-span bridge Longitudinally connected ballastless track Sliding layer friction factor Fastener longitudinal resistance Contractility |
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