设有外镂空装饰结构的扭转体型高层建筑风荷载研究

发布时间：2018-10-21 07:36

【摘要】：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。
[Abstract]:The wind load of torsional high-rise building with hollowed-out decoration structure is studied by wind tunnel test method, and the distribution characteristics of wind pressure and wind load force of torsional high-rise building are analyzed. The influence of decorative structure on the wind pressure distribution of main structure, the distribution characteristics of wind pressure on the inner and outer surface of decorative structure, and the wind load force of torsional high-rise building with or without decorative structure are studied. The results show that the torsional shape has great influence on the local wind pressure and torque of the main structure, but has little effect on the resultant force of the X-direction and Y-direction wind loads of the main structure, while the decorative structure has little effect on the wind pressure on the upwind and leeward surfaces of the main structure. But it can obviously reduce the mean value and pulsation effect of wind pressure on the side wind surface of the main structure, and reduce the extreme negative pressure of the main structure, which is beneficial to the wind resistance design of the envelope structure, and the average wind pressure of the inside and outside surface of the decorative structure is very close to the same position. The combined net pressure value is very small, and the decorative structure has little effect on the average wind load of the main structure, but reduces the pulsation effect of the main structure wind load, which is beneficial to the main structure wind resistance.
【作者单位】：浙江大学土木工程学系;中国汉嘉设计集团;
【基金】：国家自然科学基金项目(51178425)
【分类号】：TU973.213

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