ダウンバーストの非定常性が建築物の風荷重に与える影響に関する研究

抄録

The wind characteristics of downbursts are significantly different from those of turbulent boundary layers. The non-stationarity, especially a severe moving downdraft and strong divergent outflow near ground, causes serious damage to buildings. In the past, few studies have focused on downbursts and downburst-induced wind loads on buildings. Therefore, the present study investigates the characteristics of downburst and its effects on buildings, based on two kinds of experiments using a pulsed wall jet and a moving wall jet. Special attention is paid to the effects of the non-stationarity of downburst on the wind pressure and force coefficients acting on buildings with flat and gable roofs. A brief discussion is made of the evaluation method of downburst wind loads on buildings.