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Abstract

Jointless bridges can effectively alleviate and eliminate the durability problems of bridge expansion joints and supports, and have broad application prospects in small and medium span bridges. Due to the integral frame structures formed by the upper and lower structures, the stress distribution of the main girder-abutment joint in the steel-concrete composite integral abutment and jointless bridges is complex. This paper built a nonlinear main girder-abutment finite element model, and selected the embedded depth of the steel girder, deck thickness of concrete bridges, and transverse width of the abutment as research parameters to analyze their effects on the stress performance of the joints. Meanwhile, based on this, a stress analysis model of the joints was built, with a bearing capacity calculation formula for the joints proposed. The results show that the embedded depth of the main girder and transverse width of the abutment are key parameters influencing the bearing capacity of the joints. The bearing capacity calculation formula proposed in this paper is in sound agreement with the finite element calculation results.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2023.06.030

First Page

188

Last Page

194

Submission Date

March 2025

Reference

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