本文關(guān)鍵詞：列車風引起的張弦梁雨棚振動分析　出處：《鐵道工程學報》2014年12期 　論文類型：期刊論文

  更多相關(guān)文章： 張弦梁 無站臺柱雨棚 列車風

【摘要】：研究目的:大跨度張弦梁結(jié)構(gòu)形式簡潔,受力合理,建筑造型優(yōu)美,但具有柔度較大、重量輕的特點,屬于風敏感結(jié)構(gòu)。列車高速過站時,列車風壓力可能對建筑物的局部產(chǎn)生較為強烈的作用,使下弦張拉弦索剛度退化,改變結(jié)構(gòu)的受力性能或引起結(jié)構(gòu)共振,對結(jié)構(gòu)產(chǎn)生不利的影響。本文以京滬高速鐵路濟南西客站無站臺柱張弦梁雨棚為例,分析列車高速通過引起無站臺柱雨棚上的列車風壓力和變化規(guī)律以及對雨棚結(jié)構(gòu)的影響,為設計提供依據(jù)。研究結(jié)論:通過研究可以得出如下結(jié)論:(1)列車風壓力沿高度方向衰減較快,沿寬度方向近似線性變化;(2)列車風壓力引起的張弦梁的Z、Y的位移及鋼梁及索的應力變化幅度均較小;(3)列車風壓力引起的雨棚結(jié)構(gòu)的風致振動頻率與結(jié)構(gòu)自振頻率相差較大,不會引起共振;(4)本研究成果對大跨度雨棚等站場設施的設計可提供指導。
[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.
【作者單位】： 鐵道第三勘察設計院集團有限公司;
【分類號】：TU311.3;U291.6
【正文快照】： 研究結(jié)論:通過研究可以得出如下結(jié)論:(1)列車風壓力沿高度方向衰減較快,沿寬度方向近似線性變化;(2)列車風壓力引起的張弦梁的Z、Y的位移及鋼梁及索的應力變化幅度均較小;(3)列車風壓力引起的雨棚結(jié)構(gòu)的風致振動頻率與結(jié)構(gòu)自振頻率相差較大,不會引起共振;(4)本研究成果對大跨

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本文編號：1386826