Proximity effects between two plus-plan shaped high-rise buildings on mean and RMS pressure coefficients

Abstract

Wind-induced interference effects may result in a substantial increase or reduction in wind forces on the buildings constructed in groups due to the modification of wind flow according to the shape and relative position of the buildings. The present study aims to conduct an experimental study of wind-generated proximity effects on both mean and Root Mean Square (RMS) pressure coefficients between two tall buildings in detail under different interference conditions. The Interference effects on the mean and RMS pressure coefficients are regarded as interference factors, i.e., Mean Interference Factor (MIF) and RMS Interference Factor (RIF). The results demonstrate that the interference effects on the local wind pressure are significantly higher on the windward side faces near the recessed corner. Full blockage condition generates suction on walls facing the gap. Half blockage and no blockage conditions create a more severe interference effect than the full blockage. The maximum values of MIF are 4, 9, and 13 in full, half, and no blockage conditions, respectively. Interference effects result in reduced wind load on side faces and leeward side faces. Suction at side faces is reduced by 65% approximately in the full blockage condition. RIF values less than unity are observed for all interference cases.