通过提取东京工艺大学低矮建筑气动数据库中的风压数据,以点风压和面积平均风压为分析参数,研究了不同坡度双坡屋盖表面的风压特性。首先给出了正风向及斜风向作用下,屋盖表面的平均和脉动风压分布。其次,通过Hermite Model法计算了双坡屋盖表面各区格面积平均风压时程的峰值因子,进而计算得到各区格的风压统计峰值,并据此分析了双坡屋盖的最不利风向和易损位置。以迎风角区域为参考,计算了该区域与屋盖其余部位面积平均风压的相关特性。最后探讨了部分国家规范中双坡屋盖围护结构设计风荷载的相关条文,并针对GB 50009—2012《建筑结构荷载规范》给出了修订建议。研究结果表明,根据各坡度屋盖风压分布、风压相关性和风压统计峰值的特点,可将双坡屋盖分为3个坡度区间,即0°≤θ≤15°(低坡度)、15°<θ≤30°(中等坡度)和30°<θ≤45°(高坡度);在多数双坡屋盖表面,吸力统计极值的最大值均发生于斜风向作用下的迎风角区域;考虑最不利风向下不同部位风吸力幅值的差异,可将低坡度的屋盖表面分为角部、长边边缘、短边边缘和中部4个区域,中等坡度和高坡度的屋盖表面可在此基础上进一步细分出屋脊区域以及短边边缘与屋脊交接区域进行风压统计。 By extracting the wind pressure data from the low building aerodynamic database of Tokyo University of Technology and using the point wind pressure and the area average wind pressure as the analysis parameters, the wind pressure characteristics of the surface of the double-slope roof with different slopes are studied. Firstly, the mean and fluctuating wind pressure distributions on the roof surface are given under the effect of the positive wind direction and the oblique wind direction. Secondly, the crest factor of the average wind pressure duration of each grid area on the double-slope roof was calculated by Hermite Model method, and then the wind pressure statistic peak value of each grid was calculated. Based on this, the most unfavorable wind direction and Vulnerable location. Taking the upwind area as a reference, the correlation characteristics between the area and the average wind pressure of the rest of the roof were calculated. Finally, the relevant provisions of the wind load design for the double-slope roof retaining structure in some countries are discussed, and the suggestions for revising GB 50009-2012 “Load Code for Building Structure” are given. The results show that the roof can be divided into three grades (0 ° ≤θ≤15 ° (low grade)) according to the characteristics of wind pressure distribution, wind pressure correlation and wind pressure statistical peak value of roof. 15 ° <θ≤30 ° (medium slope) and 30 ° <θ≤45 ° (high slope). On most double-slope roof surfaces, the maximum value of the statistical maximum of suction occurs in the upwind angle zone Considering the difference of wind suction amplitude in different parts under the most unfavorable wind direction, the roof surface of low slope can be divided into 4 parts of corner, long edge, short edge and middle part, medium slope and high slope roof surface On the basis of this, we can further subdivide the wind pressure statistics of the ridge area and the intersection of the short edge and the ridge.