WIND LOAD INTERFERENCE EFFECT OF TWIN TOWER BUILDINGS WITH ROUNDED CORNERS AND ARC-EDGES TRIANGULAR CROSS-SECTION IN TANDEM ARRANGEMENT
This paper investigates the wind load interference effects on twin tower high-rise buildings with rounded corners and arc-edges triangular cross-sections arranged in tandem.The wind tunnel testing technique is used to study the impact of relative spacing distance between the towers and the deviation in wind direction on the mean drag and lift coefficients,as well as the power spectral characteristics of the base moment in the along-wind and across-wind directions of the disturbed building.The results show that the presence of the upstream building reduc-es the mean drag and lift coefficients of the disturbed building compared to an individual building,which is more pronounced as the spacing between the towers decreases,and minor deviations in wind direction have little effect on it.The upstream disturbing building causes the energy of the base moment spectrum of the disturbed building to shift from low to high frequency,generating new spectral peaks.For the across-wind moment,this spectral peak is maximized when the relative spacing is 3.When the wind direction shifts towards the arc surface facing the wind,the energy shift essentially disappears.The research results may provide theoretical basis for wind resistance design of similar buildings.
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