PDF of Wind Pressures on Low-Rise Buildings

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Abstract
Probability distributions of wind pressures acting on points or areas of low-rise building models have been measured in turbulent boundary layer flow simulating wind over open country and suburban terrains. Results show extensive positive and negative tails for high negative and positive mean pressure coefficients, respectively. Probability density functions of wind speed have also been found positively shewed at lower heights. It is shown that the Gaussian distribution underestimates the high-pressure peak factors, whereas a Weibull model fits the data adequately. Analytical expressions for the number of upcrossings of any pressure level and the extreme value distribution are presented. Comparison with experimental data shows a good agreement.

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