Study on aerodynamic performance of non-circular cross-sectional cable-stayed cables by wind tunnel test
Liu Qingkuan1,2 Wang Xiaojiang3 Zhang Leijie3 Jia Yaya1,2 Ma Wenyong1,2 Liu Xiaobing1,2
1. Wind Engineering Research Center, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2. Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China;
3. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Abstract：The wind load on the cable of the long-span cable-stayed bridge contributes 60%-70% of the total wind load to the displacement and internal force of the girder. Since the aerodynamic forces of the stay cables are the basis of the check calculation of the static forces and stability, accurate understanding on the aerodynamic forces of stay cables is significant. A series of wind tunnel tests on cable models with circular cross section of 120mm in diameter and 3 different non-circular cross sections were performed in the Reynolds number range of 10×104-42×104, the variation law of resistance coefficients with Reynolds numbers for each case was obtained, and the influences of sectional deformation and wind directions on the resistance coefficient were analyzed. The results show that the Reynolds number effect can be enhanced by changing the cross section of cable, the resistance coefficient decreases with the increase of the deformation degrees of stay cable under the conditions of 0°-30° wind direction, while the trend is opposite under the conditions of 40°-90° wind direction. The aerodynamic coefficient and wind direction angles were partitioned based on the subcritical, critical and supercritical range of Reynolds number, and the fitting formula of drag coefficient for each region was achieved, providing a reference in the wind load design for structures with similar cross-section.
刘庆宽 王晓江 张磊杰 贾娅娅 马文勇 刘小兵. 非圆截面斜拉索气动性能风洞试验研究[J]. 土木工程学报, 2019, 52(8): 62-71.
Liu Qingkuan Wang Xiaojiang Zhang Leijie Jia Yaya Ma Wenyong Liu Xiaobing. Study on aerodynamic performance of non-circular cross-sectional cable-stayed cables by wind tunnel test. 土木工程学报, 2019, 52(8): 62-71.
