Abstract Abstract：Research purposes：The large span beam string structure which has large flexibility, light weight, is wind sensitive structure. The train passed through the station, the train wind pressure may act locally to building strong, so that the bottom chord tension chord cable stiffness degradation, change the structure stress performance or cause the structural resonance, adversely affect the structure. In this paper, as the no station column canopy of beam string structure of Jinan West Railway Station of Beijing-Shanghai High Speed Railway for example, it analyzed the cause of no station pole canopy on the train wind pressure and the change law and influence on canopy structure when train travels at high speed.
Research conclusions：Through the research, we can draw the following conclusions: (1) The pressure of train windattenuates rapidly in vertical direction and decreases linearly in horizontal direction. (2) The displacement in Z and Y direction of the string beam changes little, as well as the stress in cable and steel beam. (3) Frequency of the platform awning structure vibration caused by train wind distinguishes from natural frequency of vibration of the structure, resonance would not happen. (4) The research results can provide a guidance to design of facilities in train station yard, such as large-span canopy and so on.
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