Performance of Socket Connections for Precast Bridge Columns Subjected to Axial Load

LÜ Xinjian, LI Tao, LIU Duo, CHENG Zhao, ZHANG Jiandong

STRUCTURAL ENGINEERS ›› 2022, Vol. 38 ›› Issue (6) : 7-14.

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STRUCTURAL ENGINEERS ›› 2022, Vol. 38 ›› Issue (6) : 7-14.
Structural Analysis

Performance of Socket Connections for Precast Bridge Columns Subjected to Axial Load

  • LÜ Xinjian1, LI Tao1, LIU Duo2, CHENG Zhao3,*, ZHANG Jiandong2,4
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Abstract

To investigate the performance of socket connections for precast columns subjected to axial load, through the nonlinear three-dimensional numerical approach, this paper introduced the details of the designed models and studied the effects of column embedment length, column surface texture, and grout strength on the connection performance. The results indicated that：the ABAQUS numerical model with the surface contact algorithm adequately captured the structural behavior of the socket connections;the specimen with round foundation and confining steel tubes was adequate to fully exercise the axial performance of socket connection; increasing of column embedment length increased the strength of the socket connection in a linear relationship, whereas it had negligible effect on the side shear stress of the socket connection; the socket connections with different column surface texture exhibited comparable axial performance; the connection strength was increased by only 11.4% with increasing the compressive strength of grout from 40 MPa to 80 MPa.

Key words

precast bridge column / socket connection / axial performance / numerical analysis / parametric study

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LÜ Xinjian, LI Tao, LIU Duo, CHENG Zhao, ZHANG Jiandong. Performance of Socket Connections for Precast Bridge Columns Subjected to Axial Load. STRUCTURAL ENGINEERS. 2022, 38(6): 7-14

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