（1 同济大学建筑工程系，上海 200092； 2 华东建筑设计研究院有限公司,上海 200092)
［摘要］针对一海岛上的重要高层建筑，根据目前国际上主流国家荷载规范的相关规定，对考虑地形影响的风压/风速增大系数取值进行了深入比较和分析。同时，参照日本新颁布的荷载规范分析了地形变化对阵风系数的影响。通过分析和讨论可以看出国际上主流国家的荷载规范在考虑地形影响时风荷载增大系数的取值方面与中国规范的差别及其发展方向，同时为工程主体结构和围护结构的抗风设计中风荷载的取值提供了较为可信的参考。
［关键词］荷载规范；风压/风速增大系数；阵风系数；主体结构；围护结构
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
作者简介：李元齐，博士后，教授，博士生导师，Email:liyq@mail.tongji.edu.cn。
参考文献
［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 建筑结构荷载规范［S］.北京：中国建筑工业出版社，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］日本建筑学会(AIJ). 建筑物荷重指针·同解说［S］.东京:丸善(NFDA2壳). 1997.
［9］日本建筑学会(AIJ). 建筑物荷重指针·同解说［S］.东京:丸善(NFDA2壳). 2004.
［10］ISHIZAKI  H. Wind profiles, turbulence intensities and gust factors for design in typhoonprone regions［J］. Journal of Wind Engineering and Industrial Aerodynamics, 1983,13:5566.