【摘要】 对一实际四面开敞的造船厂房的刚性模型进行了表面压力测量风洞试验,给出了屋盖上的面积平均风压系数的等值线图,通过与几何外形相似的封闭建筑屋盖平均风压系数的比较,分析了四面开敞建筑屋盖上平均风压系数的特征.试验结果表明,四面开敞建筑的屋盖上的外压表现为吸力,最大平均外压系数发生在迎风屋檐,相对封闭建筑最大平均外压系数有所减小,建筑内部结构情况对减小的程度有一定影响;四面开敞建筑屋盖上的平均内压可能呈现为正压或者负压,绝对值比平均外压小,且受内部结构的影响显著;四面开敞建筑屋盖上总平均风压系数比封闭建筑小,受到内部结构情况的影响较大.该试验结果可为四面开敞建筑的屋盖风荷载设计提供参考.更多还原

【Abstract】 In this study,a wind tunnel testing on surface pressure is conducted on a rigid model of an actual opening workshop in a shipyard.In this regard,the contour diagram of mean wind pressure coefficients is obtained regarding roofs.By comparing the bespoke coefficients with those of geometrically-similar closed building roofs,the mean wind pressure characteristics of opening building roofs are analyzed.Accordingly,it is indicated from the experimental results that the external pressure is associated with the suction force,whereas the maximal mean external pressure coefficient occurs on the windward eaves.In comparison with closed buildings,the maximal mean external coefficients are relatively low.In addition,the difference is impacted by the internal structure.Moreover,the mean internal pressure on opening building roofs could possibly be a positive or negative value,meanwhile the absolute values of internal pressures,which are significantly affected by internal structures,are lower than those of external pressures.Furthermore,the total mean wind pressure coefficient of opening building roofs is lower than that of closed building roofs,and influenced much by internal structures.Therefore,this approach sets a reference to the wind loading design for opening building roofs.更多还原