Author(s)

Yuan Tian, Nan Zhang, Zhongyu Liu and Jianyang Yu

Corresponding Author

Yuan Tian

ABSTRACT

Accurate analysis of dynamic effects under different road load arrangements is of great significance for ensuring safety and stability of bridge, especially for long-span rail-cum-road steel bridges. The problem is studied by establishing the train-bridge dynamic interaction system. The train model is considered by the rigid-body dynamics method, the bridge model is established by the finite element method, and the wheel/rail interaction is imported by the corresponding assumption and the Kalker linear creep theory, respectively. A case study of the dynamic response of a long span rail-cum-road steel bridge in China is calculated with various road load simulations induced by a CRH2 high-speed train running through the bridge with the speed range from 160 km/h to 240 km/h. The results indicates that the maximum vertical vibrations of mid-span appears with empty road load on highway. The impact of track irregularity contributes largely to the whole vibrations than the road load arrangements.

KEYWORDS

Road load arrangements; dynamic response; rail-cum-road bridge; finite element simulation