Wind-induced Responses of Super-tall Buildings with Various Complicated Cross-sectional Shapes

Abstract

The effectiveness of aerodynamic modification to reduce wind loadings has been widely reported. However, most of previous studies have been investigated dynamic forces and pressure distributions on tall buildings with various unconventional configurations. This study was investigated dynamic characteristics and aerodynamic instability of super-tall buildings with unconventional configurations through extensive aeroelastic model experiments. Seventeen types of super-tall building models were considered such as basic and corner modification with corner cut, chamfered, oblique opening, tapered, inversely tapered, bulged, helical with twist angles of 90&#61616 , 180&#61616 , 270&#61616 , 360&#61616 and composite with 360&#61616 helical & corner cut, 4-tapered & 360&#61616 helical & corner cut, setback & corner cut, setback & 45&#61616 rotate. The results show that helical and composite models were most effective in reducing the wind-induced vibration responses in both along- and across-wind directions. configurations. This study was investigated dynamic characteristics and aerodynamic instability of super-tall buildings with unconventional configurations through extensive aeroelastic model experiments. Seventeen types of super-tall building models were considered such as basic and corner modification with corner cut, chamfered, oblique opening, tapered, inversely tapered, bulged, helical with twist angles of 90&#61616 , 180&#61616 , 270&#61616 , 360&#61616 and composite with 360&#61616 helical & corner cut, 4-tapered & 360&#61616 helical & corner cut, setback & corner cut, setback & 45&#61616 rotate. The results show that helical and composite models were most effective in reducing the wind-induced vibration responses in both along- and across-wind directions.