Abstract
Turbulence of the natural wind causes buffeting of slender structures and their dynamic reaction. Commonly used theoretical models and design procedures linearly transfer the properties of the oncoming turbulence into pressures acting on the building. This implies that the dynamic energy of the fluctuating pressures as well as their horizontal and vertical correlations are distributed as in the velocity field, neglecting effects of separation and the shape of the building. Full-scale measurements on a lighthouse tower show that this is only true for wave-numbers greater than κ=0.01. Smaller eddies are distorted by the presence of the structure. Further, the correlation of pressure fluctuations primarily depends on the line of separation and the wake. The full-scale results are verified by experiments with a dynamic model of the tower placed in a boundary-layer wind tunnel.
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