Tests for impacts of turbulence on Reynolds number effect of stayed cables

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (23) : 96-102.

LIU Qingkuan1,2, ZHAO Guichen3, AN Miao3, JIA Yaya1,2, MA Wenyong1,2,LIU Xiaobing1,2

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Abstract

Cable-stayed cables of a long-span stayed cable bridge are typical wind sensitive structures under a complex turbulent environment.Incoming flow turbulence has a very significant influence on aerodynamic performance of stayed cables.Wind tunnel tests were conducted for stayed cable model under different turbulences to measure stayed cables’ surface pressure.Under the same turbulence, variation law of stayed cable’s aerodynamic coefficient with Reynolds number and variation law of that with turbulence under the same Reynolds number were analyzed contrastively.The results showed that turbulence makes Reynolds number effect in advance, the larger the turbulence, the earlier the Reynolds number effect; with increase in turbulence, fluctuating wind pressure coefficient on windward side increases; the smaller the Reynolds number, the larger the differences among stayed cable’s pressure coefficients under different turbulences, while the larger the Reynolds number, the smaller the differences.

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stayed cables / wind tunnel test / turbulence / wind load / Reynolds number effect

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LIU Qingkuan1,2, ZHAO Guichen3, AN Miao3, JIA Yaya1,2, MA Wenyong1,2,LIU Xiaobing1,2. Tests for impacts of turbulence on Reynolds number effect of stayed cables[J]. Journal of Vibration and Shock, 2019, 38(23): 96-102

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