连体超高层建筑风压偏度与峰度分布特征分析

Distribution Characteristic Analysis of Wind Pressure’s Skewness and Kurtosis for Conjoined Super-tall Building

在C类地貌中测得某连体超高层建筑的刚性模型风洞试验数据,基于测点风压的第三、四阶矩统计量计算出每个测点对应的偏度参数和峰度参数.计算结果显示:正面迎风时迎风面偏度和峰度的非高斯特性不明显,结构内侧、背面的偏度和峰度则表现出明显的非高斯特性;斜向迎风时,随着风向角的变化风场下游柱体的偏度绝对值和峰度有明显的增大趋势;结构表面有大量测点脉动风压服从强非高斯分布,需对这些测点的阵风因子取值进行专门研究.

The wind tunnel test data was measured by class C terrain environment in a rigid model of one conjoined super-tall building,and the parameters of skewness and kurtosis were calculated,which corresponding to each measuring point. Calculation results show that the non-gaussian characteristics of skewness and kurtosis in front of windward side was not obvious,and the non-gaussian characteristics of skewness and kurtosis which were inside and back of the conjoined structure were more than standard value significantly. With the change of wind angle when inclined windward,the wind field of the downstream cylinder's skewness and kurtosis had increased obviously. The pulsating wind pressure of structure's surface had many points in strong non-gaussian distribution. Some specialized research,on gust factor of these measuring point,need to be done.