- 摘 要
-
(1 重慶大學土木工程學院，重慶 400045；2 山地城鎮(zhèn)建設與新技術教育部重點實驗室，重慶 400045；3 湖南省建筑設計院，長沙 410011）
［摘要］針對大跨度懸挑屋蓋結構風荷載特征的復雜性，進行了縮尺比為1:100的某體育場剛性模型風洞試驗研究，得到了屋面結構上平均及脈動風壓分布系數、同一測壓點上下表面脈動風壓相關系數以及不同距離測壓點上脈動風壓的相干函數，分析了同步和異步測量對計算結果造成的差別。通過對比體育場屋蓋上離體育館較近的測點與其他處測點的風壓特性，評估體育館對體育場風荷載的影響程度，為結構的抗風設計提供了依據。
［關鍵詞］懸挑屋蓋；風壓系數；干擾效應；相關系數；相干函數
中圖分類號：TU312+1文獻標識碼：A文章編號：1002-848X(2012)02-0154-06
Investigation on wind load characteristics of the large-span cantilevered roof of a stadium with interference
Zhang Zhaohui1,2，Chen Zhaohui1,2，Chen Feng 3，Sun Yi1,2(1 College of Civil Engineering, Chongqing University, Chongqing 400045, China; 2 Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing 400045, China；3 Hunan Provincial Architectural Design Institute, Changsha 410011, China)
Abstract:Considering the complicated wind load on the surface of a large-span cantilevered roof of the stadium, the wind tunnel test on a rigid stadium model with 1:100 scale was carried out. Based on the calculation and analysis of the experiment results, the mean wind pressure factors, the correlativity of between up and down surfaces and the coherence function between the fluctuating wind pressures of different distances were discussed. The results difference between the synchronous and asynchronous measure was analyzed. By comparing the wind load characteristics of the pressure taps near the gymnasium with the others, the influence degree of the gymnasium was estimated, which can be used for the wind resistant design.
Keywords:cantilevered roof; wind pressure coefficient; interference effect; correlation coefficient; coherence function
*國家自然科學基金（50708118）。
通迅作者：陳朝暉，教授，博士生導師，Email：zhaohuic@cqu.edu.cn。
參考文獻
［1］顧明,黃友欽,黃鵬,等.體育場挑篷的風荷載試驗研究［J］. 同濟大學學報：自然科學版, 2008,36(9):1170-1175.
［2］李宏男,伊廷華. 某體育場看臺挑篷風荷載特性及干擾效應風洞試驗研究［J］.建筑結構,2009,39(7):90-93.
［3］MARIGHETTI J，WITTWER A，DE BORTOLI M, et al. Fluctuating and mean pressure measurements on a stadium covering in wind tunnel［J］. Wind Engineering and Industrial Aerodynamics, 2000, 84(3):321-328.
［4］AS/NZS1170-2—2002 Australian Standard SAA Loading Code, Part 2: Wind Loads ［S］. Published by Standards Australia, Standards House,2002.
［5］MELBOURNE W H, CHEUNG J C K. Reducing the wind loading on large cantilevered roofs［J］. Wind Engineering and Industrial Aerodynamics, 1988,28(1-3):401-410.
［6］MELBOURNE W H. The response of large roofs to wind action ［J］. Wind Engineering and Industrial Aerodynamics, 1995(54-55):325-335.
［7］KILLEN G P, LETCHFORD C W. A parametric study of wind loads on grandstand roofs［J］. Engineering Structures, 2001,23(6): 725-735.
［8］朱川海.大型體育場主看臺挑篷的風荷載特性與風致響應研究［D］.上海：同濟大學，2003
［9］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.
［10］GB 50009—2001 建筑結構荷載規(guī)范［S］. 北京:中國建筑工業(yè)出版社,2002.
［11］沈國輝,孫炳楠,樓文娟. 大跨屋蓋懸挑結構的風荷載分析［J］. 空氣動力學學報,2004,22(1):41-46.
［12］張亮亮,蔣敏,張大康. 建筑物表面脈動壓力測量與分析［J］ .空氣動力學學報,1996, 14(3) :288-294.
［13］龐加斌,朱樂東,陳偉.大面積屋頂上下表面脈動風壓的相關性分析［J］.同濟大學學報,2001,29(5):626-630.
［14］顧志福,李輝,張文宏,等.蕪湖體育場膜結構挑篷風荷載風洞模擬研究［J］.建筑結構,2004,34(7):44-46.
［15］孫瑛，武岳，林志興,等.大跨屋蓋結構風壓脈動的非高斯特性［J］. 土木工程學報,2007,40(4):1-5.
［16］黃鵬,顧明，施憲城. 風洞模型試驗中峰值因子的討論［J］.結構工程師, 1997(4):16-19.
［17］傅繼陽,謝壯寧,倪振華.大跨懸挑平屋蓋結構風荷載特性的試驗研究［J］.土木工程學報,2003,36(10):7-14.
［18］沈國輝,孫炳楠,樓文娟.大跨度屋蓋結構的風荷載特征［J］. 建筑結構,2008,38(10):90-92.
