Pressure fluctuations on flat roofs with parapets

Abstract The mean and fluctuating pressure distributions on the roof of a square cross-section section building with adjustable height were monitored to improve our understanding of the structure of roof pressure fluctuations on roof tops of mid-rise to high-rise buildings. These measurements were made in two approach flows representing open country and urban flow conditions. Perimeter parapet walls of two different heights were introduced to examine their influence on the distribution of pressure field. It is noted that parapets influence the mean, rms and peak pressure distributions and the probability distribution of root top pressure fluctuations. These effects are directly related to the parapet height, the building height and the approach flow characteristics.