列车风引起的张弦梁雨棚振动分析

发布时间：2018-01-06 07:14

  本文关键词：列车风引起的张弦梁雨棚振动分析　出处：《铁道工程学报》2014年12期 　论文类型：期刊论文

  更多相关文章： 张弦梁 无站台柱雨棚 列车风

【摘要】：研究目的:大跨度张弦梁结构形式简洁,受力合理,建筑造型优美,但具有柔度较大、重量轻的特点,属于风敏感结构。列车高速过站时,列车风压力可能对建筑物的局部产生较为强烈的作用,使下弦张拉弦索刚度退化,改变结构的受力性能或引起结构共振,对结构产生不利的影响。本文以京沪高速铁路济南西客站无站台柱张弦梁雨棚为例,分析列车高速通过引起无站台柱雨棚上的列车风压力和变化规律以及对雨棚结构的影响,为设计提供依据。研究结论:通过研究可以得出如下结论:(1)列车风压力沿高度方向衰减较快,沿宽度方向近似线性变化;(2)列车风压力引起的张弦梁的Z、Y的位移及钢梁及索的应力变化幅度均较小;(3)列车风压力引起的雨棚结构的风致振动频率与结构自振频率相差较大,不会引起共振;(4)本研究成果对大跨度雨棚等站场设施的设计可提供指导。
[Abstract]:Research purpose: the long-span beam string structure is a wind-sensitive structure with simple structure, reasonable force and beautiful architectural shape, but it has the characteristics of large flexibility and light weight, so it belongs to the wind-sensitive structure. When the train passes through the station at high speed. The train wind pressure may have a strong effect on the local structure, which will degenerate the stiffness of the lower chord tension cable, change the mechanical behavior of the structure or cause structural resonance. This paper takes the rain shed without platform column in Jinan West passenger Station of Beijing-Shanghai High Speed Railway as an example. This paper analyzes the law of train wind pressure and variation and the influence on the structure of rain shed caused by high speed train passing on the rain shed without platform post. The conclusions are as follows: the wind pressure of the train decreases rapidly along the height direction and changes linearly along the width direction. (2) the displacement of the beam string caused by train wind pressure and the stress change of the steel beam and cable are smaller; 3) the wind-induced vibration frequency of the rain shed structure caused by train wind pressure is quite different from the natural vibration frequency of the structure, and it will not cause resonance. 4) the results of this study can provide guidance for the design of large-span rain shed and other station facilities.
【作者单位】： 铁道第三勘察设计院集团有限公司;
【分类号】：TU311.3;U291.6
【正文快照】： 研究结论:通过研究可以得出如下结论:(1)列车风压力沿高度方向衰减较快,沿宽度方向近似线性变化;(2)列车风压力引起的张弦梁的Z、Y的位移及钢梁及索的应力变化幅度均较小;(3)列车风压力引起的雨棚结构的风致振动频率与结构自振频率相差较大,不会引起共振;(4)本研究成果对大跨

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