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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第9卷    第1期    总第45期    2012年2月

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文章编号:1672-7029(2012)01-0030-06
采用槽形梁桥面的大跨度钢桁拱桥车桥动力分析
唐俊峰1,伊雪倩2,郭向荣1

(1.中南大学土木工程学院,湖南长沙410075; 2.云南交通职业技术学院公路学院,云南昆明650000)

摘 要: 槽形梁道碴桥面是适用于钢桥的一种桥面新形式,为研究该种桥面的钢桥动力性能,以某大跨度钢桁拱桥为研究对象,将列车、桥梁为联合动力体系,建立了列车与大跨度钢桁拱桥的车桥耦合动力分析模型。在建立桥梁的有限元分析模型时,对该桥所采用的槽形梁形式桥面选用了梁格法来建模。计算桥梁的自振特性; 采用计算机模拟方法,计算了ICE 高速列车以不同车速通过该大跨度钢桁拱桥的空间振动响应,检算该桥是否具有足够的横向、竖向刚度; 同时,基于合理的列车走行性评价指标,对列车通过该桥时的走行安全性和舒适性进行了评价分析。计算分析结果表明: 该桥具有足够的横、竖向刚度,整体动力性能良好,列车过桥时具有良好的走行性,所得结果可供设计参考。

 

关键字: 拱桥; 槽形梁; 梁格法; 列车; 空间振动

The train-bridge dynamic analysis of long-span steel trussed arch bridge which using channel beam as bridge deck
TANG Jun-feng1,YI Xue-qian2,GUO Xiang-rong1

1.School of Civil Engineering,Central South University,Changsha 410075,China;
2.Highway Institute,Yunnan Jiaotong Vocational and Technical College,Kunming 650000,China

Abstract:The channel beam bridge deck is a new kind of bridge deck for steel bridge.Taking a long-span steel trussed arch bridge as the research objective,this paper considered the train and bridge as a combined dynamic system,and established the train-bridge coupling dynamic analysis model of the train and long-span steel trussed arch bridge to study the dynamic performance of steel bridge with channel beam deck.In building the finite element analysis model of the bridge,the grillage method was used for the model of channel beam bridge deck.In this paper,the vibration characteristics were analyzed and calculated.Through computer simulation method,the spatial vibration responses when the ICE high-speed train passes by with different speed,were calculated.The lateral and vertical stiffness were also calculated to confirm whether they are both stiff enough.The running safety and comfort when the train passes by was analyzed on the basis of rational evaluation standard of running qualities of vehicle.The calculation results show that: the bridge has enough horizontal,vertical stiffness,the overall dynamic performance is good and the bridge has good train running property.The research in this paper is expected to provide helpful reference for the future designs.

 

Key words: arch bridge; channel beam; grillage method; train; spatial vibration

ISSN 1672-7029
CN 43-1423/U

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