Coupling vibration response of train-station-bridge integration for large-scale passenger station

In order to research the structure vibration of complex Railway Passenger Station (RPS) with station-bridge integration induced by high-speed train, Tianjin West Station was taken as an example and the self-developed software TRBF-DYNA was used to investigate the dynamic response of train-RPS coupled system. The whole three-dimensional model of track-RPS system was established by finite element method, the multi-rigid-body dynamics was employed to build the model of train possessing 31 degrees of freedom, and the nonlinear Hertzian contact theory was used to model the separable contact relationship of track and wheel. Modal analysis of RPS structure and the dynamic response of train-RPS coupled system induced by high-speed train were conducted. The results show that the stiffness of RPS track level can meet the requirements and the natural frequency is greater than the minimum limit. The vibration of RPS is controlled by train vertical dynamic loading and vertical vibration prevails. Along the height direction of RPS structure, the dynamic response of structure vibration at track level is maximum, that at elevated level is smaller and that at roof level is minimum. The vibration response of track level and elevated level decreases rapidly with the increase of the horizontal distance from the measuring point to track. The ballastless track can reduce the impact of train acted on the track level during the vibration induced by train transmitting to RPS structure. The dynamic response of RPS structure and train running safety indexes meet the code requirements. The structure design of Tianjin West Station is safe and has enough safety margins.