- 摘 要
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(1 大連理工大學海岸和近海工程國家重點實驗室,大連 116023; 2 同濟大學土木工程防災國家重點實驗室,上海 200092)
［摘要］對某一具有代表性的大型體育場看臺挑篷剛性模型進行了表面測壓風洞試驗，詳細介紹了試驗所采用的主要技術參數(shù)和基本的數(shù)據(jù)處理方法，對比研究了在有、無臨近建筑物干擾情況下的體育場挑篷表面風壓分布的等值線圖和結構典型測點在不同風向角下的風壓變化規(guī)律。結果表明，鄰近建筑對所測建筑的風荷載有一定的氣動干擾影響，相關結論為結構的抗風設計提供了可靠的依據(jù)。
［關鍵詞］體育場挑篷；風洞試驗；干擾效應；風壓系數(shù)
Experimental study on wind pressure distribution characteristics and interference effects of a stadium covering
Li Hongnan1， Yi Tinghua1,2(1 State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China; 2 State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)
Abstract:A wind tunnel test of a stadium model is carried out to investigate the wind pressure distribution on the stadium covering. Firstly, the technical parameters used in the test and the basic data processing methods are introduced in detail. Then, the contour curves of mean wind pressures for the most unfavorable conditions, which show clearly the characteristics of wind pressure distributions on the roof of the structure, and the variations of wind pressure for typical measuring points under different wind angles, are given to analyze the effect with and without the interference of the surrounding building. The results show that the interfering building may cause certain shielding effects that cannot be ignored by decreasing the mean wind load on the principal building. The results can be used as reference for the wind resistance design of the building.
Keywords:stadium covering; wind tunnel test; interference effect; wind pressure coefficients
高等學校學科創(chuàng)新引智計劃資助項目(B08014)；教育部長江學者和創(chuàng)新團隊發(fā)展計劃(IRT0518)；住房和城鄉(xiāng)建設部科學技術項目(2008-K2-37)；同濟大學土木工程防災國家重點實驗室開放課題基金(2007-C-02)。
作者簡介：李宏男,博士，長江學者特聘教授,博導,Email: hnli@dlut.edu.cn。
參考文獻
［1］ 朱川海, 顧明. 大型體育場主看臺挑篷抗風研究現(xiàn)狀及展望［J］. 空間結構, 2005, 11(2): 27-33.
［2］CERMAK J E. Windtunnel development and trends in applications to civil engineering［J］. Journal of Wind Engineering and Industrial Aerodynamics, 2003, 91: 355-370.
［3］GB50009—2001建筑結構荷載規(guī)范［S］. 北京: 中國建筑工業(yè)出版社, 2002.
［4］伊廷華, 李宏男, 顧明. 典型體育館屋蓋表面平均風壓特性及干擾效應風洞試驗研究［J］. 振動與沖擊, 2009, 28(1).［5］顧明, 朱川海. 大型體育場主看臺挑篷的風壓及其干擾影響［J］. 建筑結構學報, 2002, 23(4): 20-26.
［6］沈國輝, 孫炳楠, 樓文娟. 體育場看臺挑篷的風荷載及干擾效應分析［J］. 空氣動力學學報, 2005, 23(4): 490-495.
［7］李宏男, 伊廷華. 大連市貝殼博物館表面風壓分布特性風洞試驗研究［J］. 建筑結構學報, 2007(S1): 90-97.
［8］龐加斌, 林志興, 陸燁. 關于風洞中用尖劈和粗糙元模擬大氣邊界層的討論［J］. 流體力學實驗與測量, 2004, 18(2): 32-37.
［9］SIMIU E, SCANLAN R H. Wind effects on structures (3rd Edition)［M］. New York: John Wiley and Sons, 1996.
