Model experimental analysis on the dynamic response of a socket prefabricated pier under vehicle collision

In order to obtain the anti-collision performance of a socket assembled bridge pier, a socket connection structure without rough treatment on the connection interface between the precast pier column and the precast foundation was proposed. Through the model test of four socket bridge pier specimens with different embedment depths and one cast-in-place specimen under vehicle collision, the influences of the socket connection form and embedment depth on the dynamic response of bridge piers under vehicle collision were studied. The results show that the vehicle speed and embedment depth are important factors that affect the dynamic response of the socket bridge pier subjected to vehicle collision. The acceleration of bridge piers tends to increase with the increase of vehicle speed, and the damage degree of bridge piers gradually decreases with the increase of pier column embedment depth. The final failure form of the socket pier with an embedment depth of 1.0 times the pier column diameter is basically the same as that of the cast-in-place one, and the socket pile is basically the same as the cast-in-place pier in terms of the distribution and magnitude of maximum reinforcement strain. It is thus suggested that the minimum embedment depth for socket connection can be 1.0 times the pier column diameter without rough treatment on the interface between the precast pier column and the precast foundation in bridge engineering application. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.