Experimental and numerical study of precast bridge piers with a new UHPC socket column-footing connection

Zhang, Yingao; Chen, Liang; Zuo, Rui; Xie, Haihui; Yang, Shengwei; Zhang, Kefa; Hu, Zhangliang

doi:10.1007/s43452-023-00829-x

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…The conventional socket connection is generally slotted on the footing, then the precast pier is inserted and grouted 19 , 20 . Zhang et al 21 investigated the design parameters of individual piers using this connection, but they did not examine the seismic performance of this connection in an actual bridge. Haraldsson et al 22 tested the socket piers through lateral-load tests, which showed that the seismic performance of the pier using the connection is as good as that of a comparable CIP pier.…”

Section: Introductionmentioning

confidence: 99%

Quasi-static testing of UHPC cupped socket piers-footing connection and its seismic fragility analysis under near-fault ground motions

Yang,

Wu,

Zuo

et al. 2024

Sci Rep

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Assembly construction is extensively employed in bridge construction due to its ability to accelerate construction and improve quality. To speed the recovery of bridges after major earthquakes, this study proposes an assembled connection for precast piers and footings based on assembly construction. The precast piers are connected to the footings using ultra-high-performance concrete (UHPC) post-cast cupped sockets. Two specimens are tested with a 1:4 scale, namely, the cast-in-place (CIP) specimen and, the UHPC cupped socket pier specimen. Finite element models (FEM) of a continuous girder bridge with cupped socket connections are developed and verified by experimental results. The seismic fragility analysis is conducted to investigate the difference between the cupped socket connection and the CIP connection. The experimental results showed that the plastic hinge was formed on the precast piers and there was little damage to the UHPC sockets. The results of FEA indicate that UHPC cupped socket piers have slightly higher seismic fragility than the seismic fragility of cast-in-place piers. Then, some methods were proposed to reduce the seismic fragility of UHPC cupped socket piers, and their availability was confirmed by comparing them with the seismic fragility of CIP piers. Finally, an example bridge with this connection is introduced to illustrate replacing prefabricated piers after an earthquake.

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