中文摘要：

为了研究某体育场波纹表面月牙形悬挑屋盖的风荷载特性以及屋盖表面波纹对风压的影响,对该结构进行风洞试验和计算流体动力学（CFD）分析.通过对风洞试验数据的统计分析,得到结构的平均风压、脉动风压、极值风压的分布规律和屋盖上下表面风压的相关性.基于波纹状模型的CFD数值模拟,研究发现屋盖波纹表面的波峰处风压明显大于相临的波谷处风压,而且大于光滑屋面相应区域的风压,所得这一规律可以推广到一般的波纹状悬挑结构.试验得到的极值风压可以换算成用于围护结构设计的阵风系数,在与现行规范进行比较后,给出针对该体型建筑围护结构设计中阵风系数取值的建议.将试验结果与已有研究成果进行了比较,并分析了波纹表面和建筑物阻挡对上下表面风压相关性的影响,发现悬挑结构的波纹状表面对上下表面的风压相关性影响较小,而建筑物阻挡对相关性影响较大.

英文摘要：

Wind tunnel tests were conducted on a crescent-shaped cantilevered roof with wavy surface to study the wind pressure characteristics of the structure. And computational fluid dynamics （CFD） analysis was carried out to research the influence of the wavy surface on the local wind pressure. Via statistic analysis of wind tunnel test results, the distribution rules of mean wind pressure, fluctuating wind pressure and extreme wind pressure and the correlation coefficients of wind pressures on upper and lower surfaces were obtained. The CFD simulation showed that the wind pressure of crest regions was obviously higher than that of valley regions nearby and also higher than that of smooth roof at corresponding regions. The rule obtained could be applied to common wavy cantilevered structures. The extreme wind pressure could be converted into gust factor used for building envelope design. Comparing with code, some suggestions on design of structures with similar shape were proposed. The effect of wavy surface and block on wind pressure correlation coefficients of upper and lower surfaces was analyzed. The result showed that wavy surface had little influence on the correlation, yet block of structure had significant influence on the correlation.