With the method of bridge structural dynamics and vehicle dynamics, regarding the vehicle and the bridge as a combined vibration system, a vehicle/bridge interaction model is established for predicting dynamic responses of long-span cable- stayed bridges subjected to moving high-speed train. The 3D free vibration properties of the cable-stayed bridge with three towers of the schemed Nanjing Yangtze-River bridge on Beijing-Shanghai high-speed railway are analyzed by space bar FEM model. The coupling vibration responses of vehicle-bridge system under moving ICE high-speed trains are calculated and the properties of vibration responses are analyzed in details. Finally, based on the reasonable assessment index, the train running safety and passenger riding comfort of the bridge are especially studied. The applicability of long-span cable-stayed bridge for high-speed railway is investigated primarily.
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