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Abstract

Due to the significant variation in alignment, the force of small-radius curved bridges is rather complex. Different connection methods of piers and beams can have a considerable impact on the overall force performance of small-radius curved bridges, which requires careful consideration during the design process. This paper took the two-span small-radius curved cast-in-place box girder bridge of a certain expressway ramp bridge as an example. The finite element model of the bridge was established by using Midas/Civil software, and the static performance of the bridge under the conditions of simply supported piers and beams and consolidated piers and beams was analyzed from three aspects: strength, stiffness, and stability. The results show that under the consolidation condition of piers and beams, the longitudinal and transverse displacements of the pier top and the box girder are smaller, and the stability is higher. However, the bending moment of the piers is larger. Therefore, the reinforcement ratio should also be increased accordingly in the design. Due to the relatively small stiffness of the pier body, the longitudinal and transverse displacements of the first hollow piers are relatively large. The consolidation of piers and beams has a significant influence on the stress of piers and a relatively small influence on the stress of box girders. Based on the analysis of the three aspects of comprehensive stiffness, strength, and stability, the consolidation of piers and beams is more suitable for the connection of piers and beams in small-radius cast-in-place box girder bridges.

Publication Date

6-18-2022

DOI

10.14048/j.issn.1671-2579.2022.03.012

First Page

64

Last Page

69

Submission Date

May 2025

Reference

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