Influence of Maintenance Rail Position and Guide Vanes on Vortex-Induced Vibration Performance of Flat Box Girders

被引：0
作者：
Huang L. [1 ,2 ]
Dong J. [1 ,2 ]
Wang Q. [1 ,2 ]
Liao H. [1 ,2 ]
机构：
[1] Research Center for Wind Engineering, Southwest Jiaotong University, Chengdu
[2] School of Civil Engineering, Southwest Jiaotong University, Chengdu
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2023年 / 58卷 / 03期
关键词：
aerodynamic countermeasures; computational fluid dynamics (CFD); large scale section model; maintenance rail; vortex-induced vibration; wide flat steel box girder;
D O I：
10.3969/j.issn.0258-2724.20210474
中图分类号：
学科分类号：
摘要：
To study the influence of the maintenance rail position and the guide vanes on the vortex-induced vibration (VIV) performance of the wide flat box girder section, the Lingdingyang Bridge (a long-span suspension bridge with wide flat steel box girder) is taken as an example. The VIV of the main girder is studied using a 1∶25 scale section model wind tunnel test, and the two-dimensional flow field of the cross section is simulated using computational fluid dynamics. The test results show that increasing l (the distance between the maintenance rail and the bottom edge of the main girder) can significantly improve the VIV performance of a wide flat box girder. When l ≥ Wb/6 (Wb is the bottom width of the main girder), the VIV of the girder can be completely eliminated under different wind attack angles. Installing a guide vane with a 17° angle inside or on both sides of the maintenance rail can significantly suppress the VIV of the girder, and the suppression effect is the same. When l ≥ Wb/10, the installation of the guide vane can completely eliminate the VIV of the girder. The numerical simulation results show that increasing the distance between the maintenance rail and the bottom edge of the girder and setting a guide vane can both significantly reduce the periodic vortex-induced force of the main girder by eliminating the wake vortex at the inclined web downstream of the section, thereby suppressing the VIV of the girder. © 2023 Science Press. All rights reserved.
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页码：535 / 545
页数：10
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