Abstract:In order to study the impact resistance of reinforced concrete piers, on the basis of existing tests, a numerical model is established, and the results of numerical model are in good agreement with that of the experimental, and the rationality of the reinforced concrete model is verified. The impact model of three-dimensional multispan reinforced concrete bridges and vehicle is established. The impact analysis of piers with different concrete strength is carried out. The impact time history curve, pier deformation, moment response, shear response, axial response, pier vibration period and damping ratio are studied. The results show that: improving the concrete strength can not significantly improve the impact resistance of the pier, but can reduce the damage of the pier; increasing the concrete strength can reduce the peak displacement of the pier; improving the concrete strength can reduce the vibration period of the pier