【摘要】 以首都博物馆新馆为例,通过风洞模拟实验研究了平屋盖大跨度挑檐结构上装有百叶结构时的平均风荷载特性,给出了屋盖整体及挑檐结构上不同风向角的压力分布规律。文中特别讨论了百叶结构对挑檐上平均风压分布的影响。结果表明:在挑檐前檐安装百叶结构对挑檐结构风压的影响非常大。在不利风向角,百叶结构能有效减小挑檐结构上表面的负压。这些结论对类似结构的抗风设计具有一定的指导意义。更多还原

【Abstract】 Characteristics of mean wind load on a long-span-cantilevered-structure,which is designed for capital new museum’s flat roof,are studied in wind tunnel.Pressure distributions on the cantilevered structures at various wind directions are obtained.The effect of mean wind pressure on the cantilevered structure by fitting a louver structure is discussed in detail.The results show that fitting a louver structure on the front part of the cantilevered structure has a great influence on wind pressure distributions on the cantilevered structure.The louver structure reduces the negative pressure effectively on upside of the cantilevered structure as the cantilevered structure suffers from the most disadvantageous wind directions.These conclusions can be useful for the wind load design of similar structures.更多还原