A long-span stadium roof has always been a wind load sensitive system, given its usual complex curved surface. However, there is no definite method for calculating the wind load shape factor of the complex building in the code. Based on this, the standard k − ε model was applied to the computational fluid dynamics numerical simulation of a long-span stadium roof at the wind attack angles of 0°–180°. The pressure distribution on the top and bottom surfaces of the stadium roof and the wind load shape factor were obtained by numerical simulation. The results show that the negative pressure was dominant on the top surface of the roof and the positive pressure was dominant on the bottom surface of the stadium at the wind attack angle of 0°. The ring-shaped curtain wall made the wind field environment more complicated, mainly under the wind attack angles of 45° and 180°. Because of the dip angles at both ends of the roof, the wind pressure distribution at both ends of the roof was opposite to the main region. The maximum wind load shape factors of each region were negative. In addition, the maximum wind load shape factor was at 45°, which was −1.1. The maximum wind load shape factors in regions of R13–R19 were larger, which should be paid attention in design stage. In general, the wind load shape factors were large in the central region and small at both ends. The wind load shape factors of the roof were bounded by 90°, showing an anti-symmetric trend.

中文翻译：

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大跨度体育场屋面风荷载形状系数研究

鉴于其通常复杂的曲面，大跨度体育场屋顶一直是一个风荷载敏感系统。但是，规范中并没有明确的计算复杂建筑风荷载形状系数的方法。在此基础上，将标准k-ε模型应用于大跨度体育场顶风攻角0°～180°的计算流体动力学数值模拟。通过数值模拟得到了体育场顶面和底面的压力分布和风荷载形状因子。结果表明，在迎风角为0°时，屋顶顶面负压为主，体育场底面正压为主。环形幕墙使风场环境更加复杂，主要在45°和180°的风攻角下。由于屋顶两端的倾角，屋顶两端的风压分布与主体区域相反。各区域最大风荷载形状因子均为负值。此外，最大风荷载形状系数为 45°，为 -1.1。R13-R19区域最大风荷载形状系数较大，设计阶段应注意。总体而言，中心区域的风荷载形状因子较大，两端较小。屋顶的风荷载形状因子以90°为界，呈反对称趋势。各区域最大风荷载形状因子均为负值。此外，最大风荷载形状系数为 45°，为 -1.1。R13-R19区域最大风荷载形状系数较大，设计阶段应注意。总体上，风荷载形状系数在中部大，两端小。屋顶的风荷载形状因子以90°为界，呈反对称趋势。各区域最大风荷载形状因子均为负值。此外，最大风荷载形状系数为 45°，为 -1.1。R13-R19区域最大风荷载形状系数较大，设计阶段应注意。总体而言，中心区域的风荷载形状因子较大，两端较小。屋顶的风荷载形状因子以90°为界，呈反对称趋势。