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

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (22) : 267-274.

HAN Yan， WANG Longlong， LIU Zhihao

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Abstract

In order to obtain the anti-collision performance of the socket assembled bridge pier，this research proposed a socket connection structure without rough treatment on the connection interface between the precast pier column and the precast foundation. Through the model test of four socket bridge pier specimens with different embedment depths and one cast-in-place specimen under the vehicle collision，the influence of socket connection form and embedment depth on the dynamic response of bridge piers to vehicle collision was studied. The results show that the vehicle speed and embedment depth are important factors that affect the dynamic response of 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 socket pier with 1.0 times the embedment depth of the pier column diameter is basically same as that of the cast-in-place one，and it is basically same as the cast-in-place pier in terms of the distribution and amplitude 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.

Key words

prefabricated bridge pier / socket connection / vehicle / impact force / dynamic response

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HAN Yan， WANG Longlong， LIU Zhihao. Model experimental analysis on the dynamic response of a socket prefabricated pier under vehicle collision[J]. Journal of Vibration and Shock, 2021, 40(22): 267-274

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