（同济大学土木工程防灾国家重点实验室 上海 200092）
【提要】 对上海铁路南站结构模型进行了风洞试验，分析了该结构屋盖表面平均及脉动风压的分布规律，对比了两者的异同并指出造成这种差别的原因，比较了这一大跨度屋盖结构在无周边建筑和有周边建筑情况下屋面的风压分布特性。将极值风压系数与平均风压系数进行了比较，最后分析了屋盖表面测点风压自功率谱及互功率谱的特性。
【关键词】 大跨度屋盖结构 平均风压 脉动风压 功率谱
Testing Study on Wind Pressure Behaviors of Shanghai South Railway Station Roof/Zhou Xuanyi，Huang Peng，Gu Ming（State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China）
Abstract:Based on the windtunnel test results of Shanghai south railway station roof, comparisons between the contours of mean and fluctuating wind pressure coefficient are made,and the reason that causes the difference is given. At the same time,the behavior of wind pressure on the roof of the structure with and without considering the effects of surrounding buildings is tested. Then the probability distribution of the ratio of peak pressure coefficient to mean pressure coefficient is calculated. At last,the characteristics of wind pressure power spectrum are analyzed.
Keywords:largespan roof structure; mean wind pressure; fluctuating wind pressure; power spectrum