伞形膜结构组合屋盖风荷载特性的风洞试验研究

Experimental investigation of wind loads on umbrella-shaped membrane assembled roofs

结合井冈山机场航站楼的风洞试验 ,分析了伞形膜结构组合屋盖平均风压与脉动风压的分布特性 ,并从平均风压与脉动风压相关性的分析中讨论了准定常理论的适用性 ,同时探讨了脉动风压的概率分布 ,并对峰值因子的取值提出了建议 ,论文提出对不同紊流区应分别对待的观点 。

Based on the wind tunnel test for Waiting Building of Jinggangshan Airport, the mean and fluctuating wind pressure coefficient distribution on the umbrella-shaped membrane assembled roof was studied and the applicability of quasi-steady theory is discussed by correlation analysis of the mean and fluctuating pressure on the same point with variable azimuths and on variable points with the same azimuth. Meanwhile, the probability distribution of fluctuating wind pressure coefficient is discussed and the determination of the peak factors for estimating the max positive wind pressure and the max negative wind pressure is suggested. The viewpoint that zones with different turbulivity should be distinguished is presented, and the rules which can guide global and partial wind-resistance design of general umbrella-shaped membrane assembled roofs are obtained.