Abstract:In order to explore the influence of facade changes on aerodynamic characteristics of rounded corner arc triangular super high-rise buildings, the wind tunnel test method was used to test the surface wind pressure of buildings with six kinds of facade contraction forms, and the variation characteristics of three-component force coefficients, cross-wind overturning moment coefficients power spectrum, and layer fluctuating lift coefficients power spectrum angles under different facade contraction forms, landforms and wind directions were studied. The results show that both the tapering and setback can effectively reduce the mean drag coefficients, mean lift coefficients and fluctuating lift coefficients, and the decrease amplitude increases with the increase of the taper ratio. In contrast, the effect of setback is better. The two rotating setback can reduce the mean three-component coefficients and fluctuating drag coefficients to a greater extent, and change the wind direction range corresponding to the peak values of the fluctuating lift coefficients and fluctuating torque coefficients. With the increase of taper ratio, the peak frequency of cross-wind overturning moment coefficients power spectrum increases, and the peak of the spectrum decreases, which are more influenced by setback. The two rotating setback can make the energy of some frequency bands of the power spectrum exceed that of the case of setback, because when the rounded corner of the rotating part is windward, the accelerated airflow on the two arcs can enhance the vortex shedding of the upper adjacent part.
丁通,陈水福. 不同立面收缩形式圆角弧边三角形超高层建筑的气动力特性[J]. 振动与冲击, 2022, 41(4): 70-76.
DING Tong,CHEN Shuifu. Aerodynamic characteristics of rounded corner arc triangular super high-rise buildings with different forms of facade contraction. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(4): 70-76.
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