大跨屋盖风荷载特性的风洞试验研究

Experimental Investigation on Characteristics of Wind Load on Large Span Roof

本文结合深圳市高交会展馆续建工程屋盖的试验研究，分析了位于高湍流区域的大跨低矮屋盖的平均风压及脉动风压分布特性，通过屋盖测点脉动风压随风向变化的三维功率谱密度函数，分析了结构的漩涡脱落特征。所得的这些结果对于结构的抗风设计有较为重要的指导意义。

Based on wind tunnel investigation of the extension of the building for Shenzhen High tech Trade Convention, the characteristics of average wind pressure and fluctuating wind pressure distributed on the large span and low rise roof are investigated in this paper. The wind differential pressure coefficients and power spectra density (PSD) of some typical locations of the roof situated in high turbulent regions are analyzed. The suction located on the roof′ s windward corners can reach very high values, and the PSD of typical location has some special features that may be related to vortex shedding. The results given by this paper might be a significant guide for structural design.