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Abstract

At present, segmental precast erection technology is gradually being widely popularized and applied in urban viaducts in China. As the box girder width increases, the cantilever of concrete box girder bridges becomes longer, and wide box girders are often arranged with transverse prestressed tendons, which makes the spatial performance more complex and the transverse effect of box girders increasingly obvious. Meanwhile, studying the transverse stress distribution and performance of wide box girder structures can help solve key technical problems in the analysis and design of concrete wide box girder bridges. By taking a large-cantilever continuous beam bridge with equal cross-sections in a city under construction using segmental precast erection technology as the research object, this paper built a box girder-plate element model by adopting Midas/Civil, and employed Ansys finite element software to build a three-dimensional solid finite element model of the segmental box girder. Additionally, two calculation methods were utilized to calculate the transverse stress distribution law and stress distribution of the box girders under the action of various loads. All calculation results can meet the specification requirements, with the effective load distribution width of different spans and variable cross-section flange plates studied. The results can provide some references for the design and calculation of transverse stress in similar projects.

Publication Date

11-8-2022

DOI

10.14048/j.issn.1671-2579.2022.05.025

First Page

138

Last Page

144

Submission Date

April 2025

Reference

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