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(1 鄭州大學(xué)綜合設(shè)計(jì)研究院有限公司， 鄭州 450001； 2 河南工業(yè)大學(xué)土木建筑學(xué)院， 鄭州 450001； 3 石家莊鐵道大學(xué)風(fēng)工程研究中心， 石家莊 050043；  4 長(zhǎng)江三峽集團(tuán)福建能源投資有限公司， 福州 350003； 5 中國(guó)氣象局上海臺(tái)風(fēng)研究所， 上海 200030)

［摘要］采用風(fēng)洞試驗(yàn)和CFD數(shù)值模擬方法，對(duì)某U形大跨懸挑屋蓋風(fēng)荷載進(jìn)行了研究。通過(guò)1/200縮尺比的剛性模型測(cè)壓風(fēng)洞試驗(yàn)，得到了屋蓋表面的平均和脈動(dòng)風(fēng)壓系數(shù)分布特征；采用CFD定常數(shù)值模擬計(jì)算了屋蓋的繞流特性，并與風(fēng)洞試驗(yàn)結(jié)果對(duì)比，驗(yàn)證了數(shù)值模擬結(jié)果的有效性，基于CFD數(shù)值模擬所得流場(chǎng)，分析了屋蓋周?chē)牧鲃?dòng)特性。結(jié)果表明，大跨屋蓋邊緣因存在明顯的流動(dòng)分離現(xiàn)象，使得該處存在較大風(fēng)吸力。

［關(guān)鍵詞］大跨屋蓋； 風(fēng)荷載； 風(fēng)洞試驗(yàn)； 數(shù)值模擬

中圖分類(lèi)號(hào)：TU398-7文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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