大跨雙層屋蓋結(jié)構(gòu)風(fēng)洞試驗與風(fēng)振響應(yīng)研究*
楊學(xué)林1，陳水福2，周平槐1
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楊學(xué)林1，陳水福2，周平槐1（1 浙江省建筑設(shè)計研究院，杭州 310006；2 浙江大學(xué)建筑工程學(xué)院，杭州 310058）［摘要］對南太湖濕地奧體公園復(fù)雜體型體育場雙層屋蓋結(jié)構(gòu)進行了風(fēng)荷載的風(fēng)洞試驗與風(fēng)致動力響應(yīng)研究。屋蓋由高低兩個開口橢圓屋面疊合而成，兩屋面之間設(shè)置觀光走廊。利用風(fēng)洞模型試驗測定了雙層屋蓋上下表面的平均和脈動風(fēng)壓時程數(shù)據(jù)。通過計算分析得到了屋蓋結(jié)構(gòu)局部測點的極值風(fēng)壓以及平均風(fēng)荷載整體合力與最不利風(fēng)向角。然后基于有限元方法對該屋蓋進行了風(fēng)振響應(yīng)的動力時程分析，獲得了結(jié)構(gòu)風(fēng)振系數(shù)、等效靜力風(fēng)荷載的分布圖以及考慮風(fēng)振效應(yīng)的最不利風(fēng)向等數(shù)據(jù)和結(jié)論。［關(guān)鍵詞］大跨屋蓋；雙層屋蓋；風(fēng)荷載；風(fēng)振響應(yīng)；風(fēng)洞試驗中圖分類號：TU 391.4，TU 311.3文獻標(biāo)識碼：A文章編號：1002-848X(2012)08-0012-03Study on-wind-induced dynamic responses and-wind tunnel test-for a large-span doublelayered roof structureYang Xuelin1，Chen Shuifu2，Zhou Pinghuai1(1 Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China;2 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China）Abstract: Wind tunnel test and wind-induced dynamic response analysis were carried out for a complex-shaped large-span double-layered stadium roof structure localed at the Nantai Lake Olympic Wetland Park. The roof is composed of two curved layers at different height levels between which an observation corridor is arranged. The mean and fluctuating wind pressures on the upper and lower surface of the roof were first measured through the wind tunnel model test. The peak pressure at local points and the global wind loads of the roof including the most unfavorable wind direction angles are analyzed and determined. A dynamic time history analysis based on the finite element procedure is then performed to predict the wind-induced dynamic responses of the roof. The diagrams of wind vibration coefficient and equivalent static wind load distributions, and the most unfavorable wind directions considering the vibration effect of the roof are analyzed and presented.Keywords: large-span roof; double-layered roof; wind-induced load; wind dynamic response; wind tunnel test*國家自然科學(xué)基金資助項目(50978230)，國家科技支撐計劃項目(2008BAJ08B14)。作者簡介：楊學(xué)林，博士，教授級高工，Email: yangxuelin@ziad.cn。參考文獻［1］黃本才. 結(jié)構(gòu)抗風(fēng)分析原理及應(yīng)用［M］. 上海：同濟大學(xué)出版社，2001.［2］GB 50009—2001建筑結(jié)構(gòu)荷載規(guī)范［S］. 2006年版.北京：中國建筑工業(yè)出版社，2006.［3］ANSI/ASCE 7—98 Minimum design loads for buildings and other structures［S］. New York, 1998.［4］Architectural Institute of Japan. AIJ recommendations for loads on buildings ［S］. Tokyo, 2004.
