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对设有外镂空装饰结构的扭转体型高层建筑的风荷载采用风洞试验方法进行研究,分析扭转体型高层建筑风压和风荷载合力的分布特征,研究装饰结构对主体结构风压分布的影响、装饰结构自身内外表面的风压分布特点,比较有无装饰结构的扭转体型高层建筑风荷载合力。结果表明:扭转体型对主体结构的局部风压和扭矩产生较大的影响,但对主体结构X向和Y向风荷载合力的影响不大;装饰结构对主体结构迎风面和背风面的风压影响较小,但能明显减小主体结构侧风面风压的平均值和脉动效应,使得主体结构的极值负压得到降低,有利于围护结构的抗风设计;装饰结构上同一位置内外表面的平均风压非常接近,合成的净压值很小;装饰结构对于主体结构的平均风荷载影响较小,但降低了主体结构风荷载的脉动效应,对主体结构的抗风有利。
The wind tunnel test method is used to study the wind load of torsionally tall buildings with outer hollow decorative structure. The distribution characteristics of the wind pressure and wind load torsional torsion of tall buildings are analyzed to study the influence of the decorative structure on the wind pressure distribution of the main structure. Structure of the inner and outer surface of the wind pressure distribution characteristics, compared with or without the decorative structure of torsion tall buildings wind load together. The results show that the torsional body shape has a great influence on the local wind pressure and torque of the main structure, but has little effect on the resultant force of the X and Y wind loads on the main structure. The effect of the decorative structure on the wind pressure on the windward and leeward sides of the main structure But can significantly reduce the average wind pressure and the pulsation effect of the side wind surface of the main structure, so that the extreme negative pressure of the main structure is reduced, which is in favor of the wind resistance design of the retaining structure; the decorative structure has the same position inside and outside The average wind pressure on the surface is very close and the net pressure of synthesis is very small. The decorative structure has less influence on the average wind load of the main structure, but reduces the pulsation effect of wind load on the main structure, which is beneficial to the wind resistance of the main structure.