Aerodynamic forces and wind loads calculation method for stay-cables with different surface roughness
LIU Qingkuan1, 2, YAN Xudong3, LI Conghui3, ZHENG Yunfei3, Ma Wenyong1, 2, Liu Xiaobing1, 2
1. Structural Health Monitoring Research Institute, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2. Hebei Provincial Key Lab of Structural Health Monitoring and Control, Shijiazhuang 050043, China;
3. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Most parts of wind loads on a large span cable-stayed bridge are caused by cables. It is very important to determine wind forces on cables exactly for bridge design and analysis. Through wind tunnel tests, aerodynamic forces of 8 types of cables with different surface roughness were measured, the influences of surface roughness on Reynolds number effect and aerodynamic force characteristics were studied, the maximum wind load on a cable of a practical bridge was calculated. Results showed that the cable surface roughness has obvious effects on aerodynamic force; with increase in the cable surface roughness, Reynolds number effect decreases gradually; for different surface roughness of a cable, wind velocities corresponding to the maximum wind loads are different; for real bridge design, the maximum wind loads of cables should be determined according to their surface roughness.
刘庆宽1, 2，闫煦东3，李聪辉3，郑云飞3，马文勇1, 2，刘小兵1, 2. 不同粗糙度斜拉索气动力特性和风荷载计算方法研究[J]. 振动与冲击, 2017, 36(23): 38-44.
LIU Qingkuan1, 2, YAN Xudong3, LI Conghui3, ZHENG Yunfei3, Ma Wenyong1, 2, Liu Xiaobing1, 2. Aerodynamic forces and wind loads calculation method for stay-cables with different surface roughness. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(23): 38-44.
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