“天使之翼”体育场风压特性试验
Experiment of Wind Pressure Characteristics of “Angel Wings” Stadium

通过对梅州体育场进行测压试验，得到平均风压系数、脉动风压系数，对其风压特性做了详细分析。结果表明:控制体育场屋面的风压主要为负压，屋盖凸起处气流分离较大，导致其负压较大；当来流由低屋面进入高屋面时，在高屋面区域产生“上吸下顶”的受荷情况，负压增大；通过对屋盖测点风压时程第三、第四阶矩的统计分析发现，非高斯性测点主要分布在屋盖气流分离区和受尾流旋涡影响的区域;高斯分布和三参数伽马分布能较好地描述体育场表面风压概率特性；Sadek-Simiu法考虑了脉动风压非高斯特性，能准确地估计非高斯风压的极值。
Mean and fluctuating pressure coefficients of Meizhou stadium were obtained based on wind tunnel test and the characteristics of wind pressures were analyzed in detail. The results show that negative pressures occur on the roof in general, and flow separation at the bulge of the roof causes high negative pressures. The wind pressures on the upper and lower surfaces of the cantilevered part of the roof will have a superimposing effect in the upwind direction when wind flow comes from low roof to high roof region. The third and fourth order statistical moments of wind pressures are employed to identify the regions subjected to non？？Gaussian pressures which are mainly located in flow separation zone and vortex affected area. Gaussian and 3-parameters Gamma distributions are capable for the superior description of the wind pressure probability characteristics on the stadium surfaces. The extreme wind pressures with non？？Gaussian features can be estimated accurately by the Sadek-Simiu method which considers the non-Gaussian characteristics of fluctuating wind pressures