Abstract
Wind tunnel experiments have been conducted to examine the influence of v and w component turbulence on roof pressures beneath conical vortices. Mean pressure coefficients for a range of pitch (vertical) and azimuth (horizontal) flow angles on a specially constructed model were obtained and combined with turbulence intensity measurements to predict rms fluctuating pressures using the quasi-steady theory. Velocity/pressure cross correlations were also obtained. Incorporation of the w component turbulence term improved the comparison with measured values but discrepancies remain as a result of the fundamental failure of the quasi-steady theory to deal with flow distortion and building generated turbulence. Simultaneous velocity and pressure data collected and analysed revealed that extremes in pressure were associated with large excursions in the lateral wind vector.
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