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某超高层建筑高228m,在建筑中部设置大型中庭空间用于建筑的自然通风和采光等。对该建筑进行了风洞模型试验,根据试验结果分析了中庭内风压分布的特点、相关性及概率特征,并对比了有无中庭情况下结构的整体风荷载。结果表明:中庭内风压分布均匀,相关性高,其概率特征可按高斯分布进行处理,中庭的存在对结构整体风荷载没有影响。根据试验结果,并结合规范的分析,给出了中庭内风压的局部体型系数和阵风系数。
A super high-rise building is 228m high, and a large atrium space is provided in the center of the building for natural ventilation and lighting of buildings. The wind tunnel model test was carried out on the building. According to the test results, the characteristics, correlations and probability characteristics of the wind pressure distribution in the atrium were analyzed. The overall wind load of the structure with or without atrium was compared. The results show that the distribution of wind pressure in the atrium is uniform and the correlation is high. The probability characteristics of the atrium can be treated by Gaussian distribution. The presence of atrium has no effect on the overall wind load of the structure. According to the test results and the analysis of the specification, the local body coefficient and gust coefficient of the wind pressure in the atrium are given.