Study on Aerodynamic Optimization of Π-Shaped Cable-Stayed Bridge with Vortex-Induced Vibration in Mountainous Areas

Authors

ZENG Min, China Communications First Aviation Bureau Southwest Engineering Co ., Ltd., Yulin , Guangxi 537000 , ChinaFollow
LIU Hanyun, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410076 , ChinaFollow
MAO Na, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410076 , China ;Hunan Provincial Communications Planning , Survey & Design Institute Co ., Ltd., Changsha , Hunan 410200 , China
CHEN Baixiang, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410076 , China
HAN Yan, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410076 , China
LI Chunguang, School of Civil and Environmental Engineering , Changsha University of Science & Technology , Changsha , Hunan 410076 , China

Corresponding Author

刘汉云，男，博士，副教授.E-mail：lhy_27@csust.edu.cn

Abstract

Given vortex-induced vibrations of bridges caused by high wind attack angles in mountainous canyons,this study investigated the vortex-induced dynamic characteristics of a Π-shaped steel-concrete composite beam cable-stayed bridge in a mountainous canyon under high wind attack angles based on wind tunnel tests and examined aerodynamic measures for vortex suppression.Firstly,a finite element model of the bridge was established,and the dynamic characteristics of the bridge in both the completed and construction states were analyzed.Subsequently,a 1∶50 scale detailed segment model was designed based on similarity theory to analyze the vortex-induced vibration performance of the original main beam under conventional wind attack angles of ± 3° and 0°,as well as the high wind attack angle of ± 5°.Then,the influence of a single aerodynamic measure such as L-shaped deflector plates,wind fairings,and lower stabilizing plates,as well as their combinations,on the vortex-induced vibration performance of the Π-shaped main beam was studied.Finally,the optimal aerodynamic measures and their performance improvements were proposed.The research reveals that the vortex-induced vibration performance of the Π-shaped beam cable-stayed bridge is poor,and significant vortex-induced vibrations occur at all five typical wind attack angles under low wind speeds.The single aerodynamic measure fails to control vortex-induced vibrations of the Π-shaped main beam.The combination of the 1# wind fairing + lower stabilizing plate exhibits excellent vortex suppression effects,reducing the corresponding vortex-induced response displacement by over 95%.The research results can provide valuable insights for similar real-world engineering projects.

Publication Date

6-23-2025

DOI

10.14048/j.issn.1671-2579.2025.03.016

First Page

130

Last Page

136

Submission Date

August 2025

Recommended Citation

Min, ZENG; Hanyun, LIU; Na, MAO; Baixiang, CHEN; Yan, HAN; and Chunguang, LI (2025) "Study on Aerodynamic Optimization of Π-Shaped Cable-Stayed Bridge with Vortex-Induced Vibration in Mountainous Areas," Journal of China & Foreign Highway: Vol. 45: Iss. 3, Article 16.
DOI: 10.14048/j.issn.1671-2579.2025.03.016
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss3/16

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