A hammering test on a 32 m simply supported steel-concrete composite box girder of a high-speed railway was carried out to analyze its vibration characteristics.By establishing a vertical coupling finite element model of the track-bridge system,the velocity mobility of each plate of the track-bridge system was calculated using harmonic response a-nalysis.After verification of the effectiveness of the model by comparing it with the experimental results,the transmission characteristics of vibration on the girder were analyzed.The pseudo excitation method was used to obtain the wheel-rail force under train running conditions,which was applied to the finite element model.The effects of the concrete thickness of steel-concrete top slab and fastener stiffness on the vibration characteristics of the steel-concrete composite box girder were discussed.It provides reference for further study on the vibration of steel-concrete composite beams.
维普
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