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Corresponding Author

尹晓峰，男，硕士研究生.E-mail：m15580964869@163.com

Abstract

To ensure the construction safety of the short-line precast wide-width concrete beam section on a high platform before splicing, the concrete beam and beam shifting support on the Jiangling side of the Guanyinsi Yangtze River Bridge were taken as the research object. Midas FEA/Civil was adopted to establish the solid model of the beam section and the beam element model of the support, respectively. The transverse stress and deformation in each construction stage before splicing, and the influence of support deformation on the stress of the beam section during beam shifting were calculated and analyzed. Considering the actual construction process and the influence of concrete shrinkage and creep, a reasonable transverse prestressed fractional tensioning scheme for the precast beam section was determined. The calculation results indicate that the transverse prestress of the precast beam section, which is mainly subjected to transverse stress before splicing, must be tensioned fractionally; the timing and degree of fractional tensioning should be adapted to the timing of system conversion and the specific conditions of supports; the deformation of the beam shifting support has a minor effect on the uneven settlement of the four supporting points of the beam section, but its adverse effect on the stress of the beam section still needs to be considered.

Publication Date

8-16-2026

DOI

10.14048/j.issn.1671-2579.2026.04.018

First Page

170

Last Page

177

Submission Date

August 2026

Reference

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