Abstract
This paper describes the statistical characteristics of wind at ground level. Observations of wind flow at ground level were conducted over a period of 2 years around a high-rise apartment building in a built-up area in Tokyo. The mean and gust wind velocities at ground level are approximated on the basis of the Weibull distribution. The probability distributions of velocity-ratio, gust factor and turbulence intensity are obtained. The relationship between the exceedance probability and the number of storms per annum is derived. The characteristics of the long-term power spectrum of wind velocity are clarified.
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