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Abstract

By taking a four-tower three main-span (145+160+145) m stiffened girder suspension bridge as the research object, this paper analyzed its wind-resistance stability performance and instability mechanism. Firstly, FLUENT fluid calculation software was adopted to calculate the three-component coefficients of the static wind load on the cross-section of the stiffened girder. Then, finite element software was utilized to analyze the nonlinear static wind stability of the entire bridge. The results indicate that the multi-span effect of a four-tower three-span suspension bridge is significant, and this bridge has different instability characteristics from typical double-tower single-span suspension bridges. The lateral bending and torsional constraint effects of a four-tower three-span suspension bridge are significant, and the nonlinear static wind instability is mainly manifested as vertical torsional-flexural instability, which is different from the lateral flexural-torsional buckling and torsional instability of ordinary double-tower single-span suspension bridges.

Publication Date

8-18-2022

DOI

10.14048/j.issn.1671-2579.2022.04.015

First Page

87

Last Page

91

Submission Date

May 2025

Reference

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