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2007年 第1卷 第1期

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《结构与土木工程前沿（英文）》 >> 2007年 第1卷 第1期 doi: 10.1007/s11709-007-0007-1

Dynamic response of a long span suspension bridge and running safety of a train under wind action

1.School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China; 2.Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, China

发布日期： 2007-03-05
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摘要

A dynamic analysis model of a wind-train-bridge system is established. The wind excitations of the system are the buffeting and self-excited forces simulated in time domain using measured aerodynamic coefficients and flutter derivatives. The proposed formulations are then applied to a long rail-cum-road suspension bridge. The dynamic responses of the bridge and the train under wind action are analyzed. The results show that the lateral and rotational displacements of the bridge are dominated by wind, while the vertical by the gravity loading of the moving train. The running safeties of the train vehicles are much affected by wind. Under wind conditions of 30 40 m/s, the offload factors, derail factors and overturn factors of the train vehicles exceed the safety allowances, to which great attention should be paid.

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