Analysis of three-dimensional wind loads of rectangular tall buildings based on torsional motion-induced vibration wind tunnel tests

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (7) : 116-123.

TANG Huai-qiang, ZOU Liang-hao, LIANG Shu-guo, WU Peng, WANG Lei

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Abstract

In order to study the effects of torsional vibration on three dimensional dynamic wind loads on tall buildings, the wind pressure time series of three models of rectangular tall building under different test wind speeds and torsional amplitudes are obtained through measuring pressure wind tunnel tests applying motion-induced vibration system. In the meantime the characteristics of root mean square(RMS) coefficients and wind load spectra in alongwind, acrosswind and torsional directions are discussed, indicating that the RMS coefficients in alongwind, acrosswind and torsional directions vary with wind speeds and torsional vibration amplitudes, and the variation of RMS alongwind force coefficients with torsional vibration amplitudes is caused by the variation of dynamic wind loads on the structures, while the variations of RMS acrosswind and torsional force coefficients are caused by the variations of the dynamic wind loads and the aerodynamic effects. As for tall buildings, the variations of dynamic wind loads in alongwind, acrosswind and torsional directions and the aerodynamic effects in acrosswind and torsional directions caused by torsional vibration should be considered.

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wind engineering / tall buildings / wind tunnel test / motion-induced vibration / wind loads / aero-elastic effects

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TANG Huai-qiang, ZOU Liang-hao, LIANG Shu-guo, WU Peng, WANG Lei. Analysis of three-dimensional wind loads of rectangular tall buildings based on torsional motion-induced vibration wind tunnel tests[J]. Journal of Vibration and Shock, 2016, 35(7): 116-123

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