(1 郑州大学综合设计研究院有限公司， 郑州 450001； 2 河南工业大学土木建筑学院， 郑州 450001； 3 石家庄铁道大学风工程研究中心， 石家庄 050043；  4 长江三峡集团福建能源投资有限公司， 福州 350003； 5 中国气象局上海台风研究所， 上海 200030)

［摘要］采用风洞试验和CFD数值模拟方法，对某U形大跨悬挑屋盖风荷载进行了研究。通过1/200缩尺比的刚性模型测压风洞试验，得到了屋盖表面的平均和脉动风压系数分布特征；采用CFD定常数值模拟计算了屋盖的绕流特性，并与风洞试验结果对比，验证了数值模拟结果的有效性，基于CFD数值模拟所得流场，分析了屋盖周围的流动特性。结果表明，大跨屋盖边缘因存在明显的流动分离现象，使得该处存在较大风吸力。

［关键词］大跨屋盖； 风荷载； 风洞试验； 数值模拟

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2019)09-0133-05

Wind tunnel test and numerical simulation of wind loads on U type long-span cantilevered roof

Zhang Sihua1, Zheng Deqian2, Ma Wenyong3, Li Zhi4, Zhang Chengyuan4, Fang Pingzhi5

(1 Zhengzhou University Multi-Functional Design and Research Academy Co., Ltd., Zhengzhou 450001, China; 2 School of Civil Engineering and Architecture, Henan University of Technology, Zhengzhou 450001, China; 3 Wind Engineering Research Center, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;4 China Three Gorges Corporation Fujian Energy Investment Co., Ltd., Fuzhou 350003, China;5 Shanghai Typhoon Institute of China Meteorological Administration, Shanghai 200030, China)

Abstract:Wind load on a long-span cantilevered roof with U type was studied both by wind tunnel test and numerical simulation. The mean and fluctuating wind pressure coefficient distribution characteristics on the roof was obtained by a 1/200 scaled rigid model wind tunnel test. A steady-state CFD numerical simulation was used to study the flow around the roof. The simulation results were  verified to be effective by comparison with correspondingly wind tunnel experimental data. The flow field around the roof was analyzed based on CFD simulation results. The results show that large wind suction was found around the long-span roof edge due to flow separation.

Keywords:long-span roof; wind load; wind tunnel test; numerical simulation