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Abstract

Traditional prefabricated socket-type bridge piers are limited in engineering applications due to the requirement for deep socket connections. This paper proposes an improved socket connection design incorporating measures such as side shear keys, U-shaped anti-punching reinforcement at the pier base, high-strength non-shrink grouting materials, and large-diameter corrugated metal pipe constraints. The current formulas for calculating socket depth in socket-type connections are reviewed, and a modified calculation formula for improved socket-type piers is presented. The influence of factors such as axial compression ratio and concrete strength on socket depth is discussed. The analysis shows that the improved socket connection reduces socket depth, decreases cap thickness, and broadens the application range. In non-seismic regions with moderate load levels, the socket depth can be as low as 0.7 times the pier diameter. The shear key design contributes 20% to the bending resistance of the socket connection. When the axial force eccentricity is less than 0.5 times the pier diameter, axial force positively contributes to the bending resistance. However, when the eccentricity exceeds 0.5 times the pier diameter, the embedding depth needs to be increased appropriately. Enhancing concrete strength further reduces the required socket depth.

Publication Date

5-11-2023

DOI

10.14048/j.issn.1671-2579.2023.02.013

First Page

74

Last Page

79

Submission Date

March 2025

Reference

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