Abstract Wind load provisions in the North American codes and standards incorporate the results of wind tunnel studies and the full-scale measurements of wind loads. These studies examined wind effects on buildings with regular plan size, i.e. less than 60 m. This fact emphasizes the importance of testing large buildings in the wind tunnel and highlights the necessity of investigating the applicability of the North American code and standard provisions to large buildings. In the present study, three building models were constructed at a length scale of 1:400 with identical plan dimensions (equivalent to 118 m × 118 m) and different heights (equivalent to 5 m, 10 m and 20 m). The models were tested in simulated open country and suburban exposures. The experimental results were compared with full-scale data and the wind provisions of the North American codes and standards. It was found that the external peak pressure coefficients recommended by ASCE 7-16 (2017) are much higher than the experimental findings whereas those recommended by ASCE 7-10 (2010) are consistent with the experimental results. However, the experimental results indicate that the corner zone should be better defined as an L-shape for large buildings of 8 m height or more and the wind loads developed on the roof corner are approximately equal to those on the edge zone for large buildings of height less than 8 m.

中文翻译：

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大平面尺寸建筑物低坡屋顶的风荷载

摘要 北美规范和标准中的风荷载规定结合了风洞研究的结果和风荷载的全尺寸测量结果。这些研究检查了风对具有规则平面尺寸（即小于 60 m）的建筑物的影响。这一事实强调了在风洞中测试大型建筑的重要性，并强调了调查北美规范和标准条款对大型建筑的适用性的必要性。在本研究中，三个建筑模型以 1:400 的长度比例构建，具有相同的平面尺寸（相当于 118 m × 118 m）和不同的高度（相当于 5 m、10 m 和 20 m）。这些模型在模拟的野外和郊区暴露中进行了测试。将试验结果与北美规范和标准的全尺寸数据和风规定进行了比较。发现ASCE 7-16 (2017)推荐的外部峰值压力系数远高于实验结果，而ASCE 7-10 (2010)推荐的与实验结果一致。然而，实验结果表明，对于 8 m 或更高的大型建筑物，角区应更好地定义为 L 形，并且屋顶角上产生的风荷载大约等于 8 m 高的大型建筑物边缘区的风荷载。高度小于 8 m。发现ASCE 7-16 (2017)推荐的外部峰值压力系数远高于实验结果，而ASCE 7-10 (2010)推荐的与实验结果一致。然而，实验结果表明，对于 8 m 或更高的大型建筑物，角区应更好地定义为 L 形，并且屋顶角上产生的风荷载大约等于 8 m 高的大型建筑物边缘区的风荷载。高度小于 8 m。发现ASCE 7-16 (2017)推荐的外部峰值压力系数远高于实验结果，而ASCE 7-10 (2010)推荐的与实验结果一致。然而，实验结果表明，对于 8 m 或更高的大型建筑物，角区应更好地定义为 L 形，并且屋顶角上产生的风荷载大约等于 8 m 高的大型建筑物边缘区的风荷载。高度小于 8 m。