Wind Tunnel Test on Shielding Effect of Arch Ribs for Irregular Bent Arch Bridges

Authors

HOU Xu, CCCC First Highway Consultants Co., Ltd., Xi’an, Shaanxi 710075, ChinaFollow
WANG Xuejun, CCCC First Highway Consultants Co., Ltd., Xi’an, Shaanxi 710075, China
LIU Yaokun, Shenzhen Expressway Construction and Development Co., Ltd., Shenzhen, Guangdong 518110, China
LONG Hang, College of Civil Engineering, Hunan University, Changsha, Hunan 410028, China; School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China
WEN Qing, College of Civil Engineering, Hunan University, Changsha, Hunan 410028, China; School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China
HUA Xugang, College of Civil Engineering, Hunan University, Changsha, Hunan 410028, China

Abstract

Bent arch bridges are a kind of novel structural form, and the components for spatial rod structures with densely arranged components exert significant shielding effects on wind load. By taking an irregular bent arch with densely arranged arch rib components as the engineering background, wind tunnel tests of the sectional model of two square arch ribs and two rectangular arch ribs with and without flanges were conducted to obtain the influence of center distance on the aerodynamic drag and aerodynamic lift coefficient of arch ribs within the wind direction angles of 0°‒90°. Meanwhile, the characteristics of the shielding effect of arch rib components on wind load were analyzed. The results of wind tunnel tests show that the shielding effect of windward arch ribs will significantly reduce the drag coefficient of leeward arch ribs. The smaller center-to-center distance ratio leads to the smaller drag of leeward arch ribs. As the wind direction angle increases, the shielding effect of windward arch ribs is weakened, with the shielding effect basically disappearing at the wind direction angle of more than 30°. The influence of flanges on the aerodynamic drag of leeward arch ribs is related to the center-to-center distance ratio and wind direction angle. In the wind direction angle of 0°‒30°, the flanges have almost no influence on the aerodynamic drag of leeward arch ribs. In the wind direction angle of 30°‒90°, the flanges lead to difference in the aerodynamic drag of leeward arch ribs, with the difference related to the center-to-center distance ratio.

Publication Date

2-5-2026

DOI

10.14048/j.issn.1671-2579.2026.01.018

First Page

169

Last Page

176

Submission Date

February 2026

Recommended Citation

Xu, HOU; Xuejun, WANG; Yaokun, LIU; Hang, LONG; Qing, WEN; and Xugang, HUA (2026) "Wind Tunnel Test on Shielding Effect of Arch Ribs for Irregular Bent Arch Bridges," Journal of China & Foreign Highway: Vol. 46: Iss. 1, Article 18.
DOI: 10.14048/j.issn.1671-2579.2026.01.018
Available at: https://zwgl1980.csust.edu.cn/journal/vol46/iss1/18

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