&nbsp;Aerodynamic forces and wind loads calculation method for stay-cables with different surface roughness

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (23) : 38-44.

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

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Abstract

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.

Key words

stay-cables / aerodynamic forces / surface roughness / Reynolds number effect / maximum wind load

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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[J]. Journal of Vibration and Shock, 2017, 36(23): 38-44

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