Host: Japan Association for Wind Engineering
Pages 93-94
We observed the wind above urban area on a high-rise building with a height of 125m in Tokyo. In this paper, we investigated the characteristics of wind turbulence using observation results of two seasonal winds and three typhoons.
(1) The turbulence intensity decreased with increasing mean wind speed, and it was close to the recommendations value (0.138) of roughness category III when wind speed exceeded 15 m/s.
(2) The gust factor showed a tendency to be proportional to the turbulence intensity. The relation between the evaluation time and the gust factor showed a value close to the Durst curve at the time of the seasonal wind and it was slightly larger at typhoon.
(3) The peak factor calculated from the relationship between the gust factor and the turbulence intensity was about 2.5.
