Abstract
Wind damage of roofing elements occure very often in the event of strong wind. The problem of the structural safety of the elements comes to the problem of wind loads on the elements. The wind loads on the" elements should be estimated by the difference of external wind pressure on the elements and internal wind pressure under the elements. But, the properties of the internal wind pressure have not be clarified, enough. In order to investigate the properties of the internal wind pressure, wirid tunnel tests on the roofing element models are caried out. In this paper, the methods of the modeling of the roofing and wind tunnel testing are discribed, and the records of fluctuations of the external and internal wind pressure on the roofing element models are showen. The Wind pressure coefficient distributions of average and fluctuating pressure are shown. And it is confirmed that if the external wind pressure distribution, Q-ΔP relation (equation 2.1) and equivalent flow coefficient are given, the internal wind pressures can be estimated.
