Study on the non-Gaussian characteristic and peak factor of across-wind response for super high-rise buildings

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (17) : 171-176.

QUAN Yong, HOU Fangchao,GU Ming

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Abstract

Based on the wind tunnel tests of the single-degree-of-freedom aeroelastic model, the non-Gaussian behavior of across-wind response of a super tall building was analyzed. The effects of different wind speeds, wind fields, Scruton numbers and interference positions on the non-Gaussian features of across-wind acceleration responses of the super high-rise building were studied by the normalized probability density distribution. The applicability of several methods determining peak factor was evaluated by comparing it with the observed value from multi-sample extreme values. The effects of wind speed, wind field, Scruton number and downstream interference building on the peak factor of wind-induced response were investigated. The results indicate that the wind-induced response shows significant non-Gaussian characteristics when the upcoming flow approaches the vortex-induced resonance wind speed in low turbulence wind field; the wind field and interference spacing have notable influences on the non-Gaussian characteristics of the wind-induced responses; the Davenport method overestimates the peak factors in the vortex-induced-resonance region and some high reduced wind speeds; the actual peak factors are usually underestimated by Chinese Load code; the sub-section extreme-value statistical method can estimate the peak factors more accurately.

Key words

super high-rise building / across-wind response / non-Gaussian / peak factor / interference effects

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QUAN Yong, HOU Fangchao,GU Ming. Study on the non-Gaussian characteristic and peak factor of across-wind response for super high-rise buildings[J]. Journal of Vibration and Shock, 2020, 39(17): 171-176

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