Host: Science Council of Japan
Co-host: Architectural Institute of Japan, Japan Association for Wind Engineering, The Institute of Electrical Engineering of Japan, Japanese Society of Steel Construction, Japanese Society of Civil Engineering, Meteorological Society of Japan
Pages 000047
Wind direction changes all the time in natural winds. Although many results of field measurements have pointed out that that wind pressures on claddings have been influenced by the change of wind direction, there are a number of unclarified points about it. That is reason why the change of wind direction in natural wind has non-stationary condition. This report suggests a method of analysis for estimating the unsteady wind direction, using the local maximum and the local minimum for the time series of wind direction in natural wind. As a result of analysis, we understood that the fluctuation of wind velocities showed a rising tendency by the more change of wind direction.
