- 摘 要
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（1 同濟(jì)大學(xué)建筑工程系，上海 200092； 2 華東建筑設(shè)計研究院有限公司,上海 200092)
［摘要］針對一海島上的重要高層建筑，根據(jù)目前國際上主流國家荷載規(guī)范的相關(guān)規(guī)定，對考慮地形影響的風(fēng)壓/風(fēng)速增大系數(shù)取值進(jìn)行了深入比較和分析。同時，參照日本新頒布的荷載規(guī)范分析了地形變化對陣風(fēng)系數(shù)的影響。通過分析和討論可以看出國際上主流國家的荷載規(guī)范在考慮地形影響時風(fēng)荷載增大系數(shù)的取值方面與中國規(guī)范的差別及其發(fā)展方向，同時為工程主體結(jié)構(gòu)和圍護(hù)結(jié)構(gòu)的抗風(fēng)設(shè)計中風(fēng)荷載的取值提供了較為可信的參考。
［關(guān)鍵詞］荷載規(guī)范；風(fēng)壓/風(fēng)速增大系數(shù)；陣風(fēng)系數(shù)；主體結(jié)構(gòu)；圍護(hù)結(jié)構(gòu)
Speed-up ratio estimation of wind load for a practical tall building considering topographical effect
Li Yuanqi1, Liu Zhenjun1, Xia Ji1, Lu Daoyuan2, Mu Wei2, Li Min2 (1 Department of Structural Engineering, Tongji University, Shanghai 200092, China; 2 East China Architectural Design & Research Institute Co., Ltd., Shanghai 200092, China)
Abstract:According to several important load codes/specifications in the world, estimation of the speed-up ratios of windspeed or wind pressure profile considering topographical effect has been discussed based on a practical important tall building built on an island.The effect of topography on the gust factor of windspeed has also been analyzed according to the related provisions of the new load code in Japan. Based on these investigations, the difference of the estimated values of speed-up ratios due to topographical effect among these codes/specifications including China load code is presented, and the tendency in current revision of the corresponding provisions is discussed. The results can offer a convincible reference to wind load analysis in wind-resistant design for the main structural system and the maintenance components of this practical project, as well as other similar project in the future.
Keywords:load codes; speed-up ratios of windspeed or wind pressure; gust factor; main structural system; maintenance structural component
作者簡介：李元齊，博士后，教授，博士生導(dǎo)師，Email:liyq@mail.#edu.cn。
參考文獻(xiàn)
［1］HOLMES J D. Wind Loading of Structures［M］. Spon Press, 2001.
［2］COOK N J. The Designer′s Guide to Wind Loading on Structures［M］. Part 1, Butterworths, 1985.
［3］GB50009—2001 建筑結(jié)構(gòu)荷載規(guī)范［S］.北京：中國建筑工業(yè)出版社，2002.
［4］National Commission of Building and Fire Code. National Building Code of Canada 1995 (NBC)［S］. National Research Council of Canada, 1995.
［5］American Society of Civil Engineers. Minimum design loads for buildings and other structures［S］. ANSI/ASCE 7-95, ASCE, New York, 2000
［6］Standards Australia. Structural Design Actions, Part 2: Wind Actions, AS/NZS 1170.2.2002［S］. Standards Australia, 2002.
［7］CEN/TC 250, EuroCode 1: Actions on Structures, Part 1-4: General Actions［S］. Wind Actions, EN 2002-1-4, 2002.
［8］日本建筑學(xué)會(AIJ). 建筑物荷重指針·同解說［S］.東京:丸善(NFDA2殼). 1997.
［9］日本建筑學(xué)會(AIJ). 建筑物荷重指針·同解說［S］.東京:丸善(NFDA2殼). 2004.
［10］ISHIZAKI H. Wind profiles, turbulence intensities and gust factors for design in typhoonprone regions［J］. Journal of Wind Engineering and Industrial Aerodynamics, 1983,13:5566.
