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(1 河南工業(yè)大學土木工程學院， 鄭州 450001； 2 同濟大學土木工程防災國家重點實驗室，上海 200092； 3 中國建筑第八工程局有限公司， 上海 200135)
［摘要］綜合采用風洞試驗和計算流體動力學(簡稱CFD)數(shù)值模擬方法，對蕭山國際機場T4航站樓主樓屋蓋表面風荷載進行了分析研究。首先，分析了屋蓋表面典型位置的平均風壓系數(shù)和脈動風壓系數(shù)隨風向角的變化規(guī)律，進而研究了具有較大平均和脈動風壓系數(shù)的75°和270°風向角下，屋蓋短軸中心位置和邊緣位置截面測點平均風壓系數(shù)隨位置的變化情況；然后，研究了典型風向角下屋蓋表面體型系數(shù)等值線云圖，并給出了用于屋蓋結構抗風設計的分塊體型系數(shù)；最后，結合CFD數(shù)值模擬所得屋蓋周圍流場，分析了屋蓋風荷載作用機理。結果表明，來流在屋蓋迎風邊緣位置存在較為明顯的流動分離現(xiàn)象，屋蓋總體上處于流動分離區(qū)，導致屋蓋總體表現(xiàn)為受到向上的風吸力作用；屋蓋迎風邊緣位置流動分離更為顯著，因此該位置的風吸力也最大，比較容易引起屋蓋的局部受風破壞。
［關鍵詞］杭州蕭山國際機場；風洞試驗；數(shù)值模擬；航站樓；大跨屋蓋；風荷載
中圖分類號：TU312-1 文獻標識碼：A文章編號：1002-848X(2021)23-0028-06
Study on wind tunnel test and numerical simulation of wind load on the roof of Hangzhou Xiaoshan International Airport T4 terminal building
ZHENG Deqian1, LIU Kuo1, QUAN Yong2, CHEN Hua3, PAN Junjun3
(1 School of Civil Engineering, Henan University of Technology, Zhengzhou 450001， China；2 State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092， China；3 China Construction Eighth Engineering Division Co., Ltd., Shanghai 200135， China)
Abstract: Wind load on the roof surface of Xiaoshan International Airport T4 terminal building was investigated by adopting wind tunnel test and computational fluid dynamics (CFD) numerical simulation methods. Firstly, variation law of the mean wind pressure coefficient and fluctuating wind pressure coefficient of typical positions on the roof surface were analyzed under different wind angle of attack. The mean wind pressure coefficient, along the central line and the leading edge sections at the short-axis orientation of the roof of the building, were compared at wind angles of attack of 75° and 270° with large mean and fluctuating wind pressure coefficients. Subsequently, distributions of the contour of shape coefficients of the roof surface were discussed at typical wind angle of attack, and the corresponding block shape coefficients were also gived for wind resistance design of roof structure. Finally, mechanism of the wind load distribution on the roof was analyzed, based on the flow field around roof by CFD numerical simulation. The results show that there is a relatively obvious flow separation phenomenon in the incoming flow at the windward edge of the roof, and the roof is generally in the flow separation zone, resulting in the overall performance of the roof subjected to upward wind suction. The flow separation is more significant at windward edge of roof, the wind suction gets maximum correspondingly at those zones, causing local wind induced damages of the roof.
Keywords:Hangzhou Xiaoshan International Airport； wind tunnel test； numerical simulation； terminal； large-span roof； wind load
作者簡介：鄭德乾，博士，副教授，Email: deqianzheng@163.com； 通信作者：潘鈞俊，博士，高級工程師，Email:panboa616@foxmail.com。
