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(1 貴陽(yáng)金陽(yáng)建設(shè)投資有限公司，貴陽(yáng) 550001；2 中國(guó)航空規(guī)劃建設(shè)發(fā)展有限公司，北京 100120)

［摘要］貴陽(yáng)奧體中心主體育場(chǎng)由東、西兩個(gè)呈牛角造型的罩篷構(gòu)成，采用了預(yù)應(yīng)力平面桁架斜交網(wǎng)格結(jié)構(gòu)體系，最大懸挑49m。對(duì)其剛性模型進(jìn)行了風(fēng)洞試驗(yàn)，給出了平均風(fēng)壓系數(shù)、平均風(fēng)荷載體型系數(shù)及風(fēng)壓分布規(guī)律并與規(guī)范計(jì)算值進(jìn)行了比較,詳細(xì)討論了風(fēng)向角對(duì)風(fēng)壓系數(shù)和體型系數(shù)的影響。結(jié)果表明：在大多數(shù)風(fēng)向角下，西罩篷的風(fēng)荷載要比東罩篷的大，罩篷立面迎風(fēng)面都是正壓，在所有風(fēng)向角下罩篷上、下表面基本都是負(fù)壓，負(fù)壓分布的局部最大值通常出現(xiàn)的迎風(fēng)罩篷上表面的前緣和下風(fēng)向罩篷上表面的后緣部分。建議對(duì)于有上、下表面圍護(hù)結(jié)構(gòu)的建筑應(yīng)分別按內(nèi)、外風(fēng)荷載體型系數(shù)設(shè)計(jì)。

［關(guān)鍵詞］體型系數(shù)；剛體模型；風(fēng)洞試驗(yàn)；風(fēng)向角；風(fēng)壓分布

Wind tunnel test and shape coefficient of wind load research for roof of the main stadium in Guiyang Olympic Sports Center

Wu Jun1, Zhang Zhong1, Wang Shu2, Liu Xingang2, Huang Jiyang2, Ge Jiaqi2

(1 Guiyang Jinyang Construction Investment Co., Ltd., Guiyang 550001, China;

2 China Aviation Planning and Construction Development Co., Ltd., Beijing 100120, China)

Abstract:The roof of the main stadium in Guiyang Olympic Sports Center is  composed of east and west roof like ox horns,and prestressed oblique in-plane truss lattice with maximum cantilever of 49m is adopted. The mean pressure coefficient, mean shape coefficient of the wind load and the wind pressure distribution on the roofs were obtained by the wind tunnel test of the rigid model and compared with the results of the local code. The effects of wind direction on the mean pressure coefficient and mean shape coefficient were researched in detail. The results indicate that the wind load of west roof is larger than that of east roof at most wind directions. The mean wind pressure on the windward profile is positive, while that on the outside and inside surfaces of roof is negative basically. The local maximum negative wind pressure distributes on the front edge of windward roof and the back edge of leeward roof generally. It is suggested that the roof cladding system with the inside and outside surfaces bearing wind load meanwhile should be designed according to the shape coefficients of the inside and outside surfaces respectively.

Keywords:shape coefficient; rigid model; wind tunnel test; wind direction; wind pressure distribution

*貴州省科技廳工業(yè)攻關(guān)項(xiàng)目(［2010］3002)，貴陽(yáng)市科技局工業(yè)攻關(guān)項(xiàng)目［2010］。

作者簡(jiǎn)介：吳軍，碩士，高級(jí)工程師，總經(jīng)理，Email:yy8033@126.com。

參考文獻(xiàn)

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［2］葛家琪,張國(guó)軍，王樹(shù)，等.貴陽(yáng)體育場(chǎng)體外預(yù)應(yīng)力大懸挑鋼管桁架結(jié)構(gòu)設(shè)計(jì)研究［J］.建筑結(jié)構(gòu)，2009，39(10):47-52.

［3］石啟印,李?lèi)?ài)群，李培彬，等.北京機(jī)場(chǎng)新塔臺(tái)結(jié)構(gòu)風(fēng)洞試驗(yàn)研究［J］.土木工程學(xué)報(bào)，2004，37(8):29-32.