有大型中庭空間的超高層建筑風荷載試驗研究*
李永貴1，李秋勝1,2
- 摘 要
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李永貴1，李秋勝1,2（1 建筑安全與節(jié)能教育部重點實驗室，湖南大學，長沙 410082； 2 香港城市大學建筑系，香港）［摘要］某超高層建筑高228m，在建筑中部設(shè)置大型中庭空間用于建筑的自然通風和采光等。對該建筑進行了風洞模型試驗，根據(jù)試驗結(jié)果分析了中庭內(nèi)風壓分布的特點、相關(guān)性及概率特征，并對比了有無中庭情況下結(jié)構(gòu)的整體風荷載。結(jié)果表明：中庭內(nèi)風壓分布均勻，相關(guān)性高，其概率特征可按高斯分布進行處理，中庭的存在對結(jié)構(gòu)整體風荷載沒有影響。根據(jù)試驗結(jié)果，并結(jié)合規(guī)范的分析，給出了中庭內(nèi)風壓的局部體型系數(shù)和陣風系數(shù)。［關(guān)鍵詞］超高層建筑；大型中庭；風洞試驗；風荷載中圖分類號：TU973.32，TU247.1文獻標識碼：A文章編號：1002-848X(2012)07-0128-06Experimental investigation of wind loads on a super tall building with a large courtyardLi Yonggui1, Li Qiusheng1,2(1 Key Laboratory of Building Safety and Energy Efficiency of Hunan University, Changsha 410082, China; 2 City University of Hong Kong, Hong Kong, China)Abstract: A super tall building with a height of 228m was designed, a large courtyard was set for natural ventilation and light. Based on results of the wind tunnel test, the wind pressure distribution characteristics, the correlations of wind pressures and the probabilistic characteristics of wind pressures in the courtyard were investigated in detail. Wind loads on the structure for the cases with and without the courtyard were compared. The results show that the pressure distributions in the courtyard are approximately uniform, the correlations of wind pressures in the courtyard are very high and their probabilistic characteristics are compatible with Gaussian distribution. Wind loads on the structure for the cases with and without the courtyard are almost identical. Finally, shape coefficient and gust factor for the design of cladding inside the courtyard were recommended.Keywords: super tall building; large courtyard; wind tunnel test; wind load*自然科學基金重大研究計劃重點項目資助（90815030），“十一五”國家科技支撐計劃項目資助（2006BAJ03B04-02）。作者簡介：李永貴，博士研究生，Email：lyg313@126.com。參考文獻［1］GB 50009—2001建筑結(jié)構(gòu)荷載規(guī)范［M］. 2006年版. 北京:中國建筑工業(yè)出版社,2006.［2］LETCHFORD C W, SANDRI P, LEVITAN M L, et al-Frequency response requirements for fluctuating wind pressure measurements［J］. Journal of Wind Engineering and Industrial Aerodynamics,1992,40 (3) :263-276.［3］黃本才,汪叢軍. 結(jié)構(gòu)抗風分析原理及應用［M］.上海:同濟大學出版社, 2008.［4］埃米爾·希繆，羅伯特·H·斯坎倫. 風對結(jié)構(gòu)的作用——風工程導論［M］. 劉尚培，項海帆，等，譯. 上海:同濟大學出版社, 1992.［5］http://wind.arch.t-kougei.ac.jp/system/eng/contents/code/tpu［DB/OL］.［6］RICHARDS P J, HOXEY R P. Quasi-steady theory and point pressures on a cubic building［J］. Journal of Wind Engineering and Industrial Aerodynamics, 2004, 92(14-15):1173-1190.［7］KUMAR K S, STATHOPOULOS T. Wind loads on low building roofs: a stochastic perspective［J］.Journal of Structural Engineering,2000,126 (8):944-956.［8］邱天爽,張旭秀,李小兵，等. 統(tǒng)計信號處理——非高斯信號處理及其應用［M］.北京:電子工業(yè)出版社,2004.［9］GIOFFRE M, GUSELLA V, GRIGORIU M. Non-Gaussian wind pressure on prismatic buildings. I: Stochastic field［J］.Journal of Structural Engineering,2001,127 (9):981-989.［10］張敏,樓文娟.矩形建筑雙幕墻結(jié)構(gòu)風壓脈動的非高斯性及峰值因子［J］. 四川大學學報：工程科學版,2009,41(5):75-81.［11］COOK N J. The designer’s guide to wind loading of building structures,Part 2: Static structures［J］. Journal of Constructional Steel Research,1990,17(3):259-260.［12］石碧青,謝壯寧,倪振華.用高頻底座力天平研究廣州西塔的風效應［J］.土木工程學報,2008,41(2):42-48.［13］GINGER J D, LETCHFORD C W. Net pressures on a low-rise full-scale building［J］. Journal of Wind Engineering and Industrial Aerodynamics, 1999,83(3):239-250.
