Prediction of fluctuating wind pressure on low building’s roof

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (5) : 157-162.

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Prediction of fluctuating wind pressure on low building’s roof

WANG Ying-ge1，LI Zheng-nong2，WU Hong-hua2, ZHANG Ling-hui1

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Abstract

The taps are usually finite in structure’s surface wind pressure research by measurement method, as restricts the wind field’s sufficient appearance. Interpolation is a regular choice, but it’s hard to directly interpolate time series. Basing on POD technique and referring ‘grid’ thought in geographical statistics, this paper processed spatial latent vectors. The Kriging interpolation method was introduced to frame Matlab program interfacing Surfer software whose powerful spatial interpolation capacity got used to spatially interpolate the structure’s surface latent vectors of each phase. Data from measured wind pressure time series of a low-rise building in typhoon are used to verify the feasibility of this method. Research shows that Kriging method can offset deficiency of triangular linear interpolation which can not extrapolate the point out of the scope; moreover Kriging method is better than the inverse distance method on prediction effect when wind pressure varies sharply. This method is relatively universal, could be widely applied in wind tunnel tests & field measuring.

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low building / field measurement / wind pressure prediction / Kriging method

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WANG Ying-ge;LI Zheng-nong;WU Hong-hua;ZHANG Ling-hui. Prediction of fluctuating wind pressure on low building’s roof [J]. Journal of Vibration and Shock, 2013, 32(5): 157-162