Our coastal areas common low slope the housing roofing surface air pressure simulation research through fluent6. 3 standard model in different wind angles, different roof slope angle, whether the cornice of three factors. The results show that: degree of influence of various parameters on the roof wind pressure, wind direction determines the overall layout of the roof wind pressure; slope angle of the roof wind pressure distribution is holistic; cornice only partial impact. This method is efficient, economical, practical and easy to carry out a more systematic parameter analysis; same time, the methods to overcome the high cost of wind tunnel tests, long cycle large scale than the impact shortcomings. Can be used to assist in wind-resistant design. Through research on wind load characteristics of low-rise gable houses used to reduce hurricane losses and the development of the national economy has a very important significance. Especially global warming, climate anomalies in increasing hurricane frequency and intensity environment.%基于fluent 6.3标准k-ε模型对我国沿海地区常见的低层双坡房屋屋面表面风压进行数值模拟,研究了不同风向角(α=0°,45°,90°)、不同屋面坡角(H=0°,18°,34°,45°)、有无挑檐3种因素影响下屋面的风压分布情况.结果表明:各参数对屋面风压的影响程度不同,风向角决定了屋面风压的整体布局,坡角对屋面风压分布的影响是整体性的,挑檐则只有局部性的影响.双坡屋面的局部风压峰值一般出现在迎风屋檐或屋脊附近,其值与屋面的坡度及风向角相关.在不同风向角下屋面坡度在18°～34°时,屋面风压值及其变化较小.该模拟分析方法克服了风洞试验存在的费用高、周期长、缩尺比影响大等缺点,可以更方便地辅助低层双坡房屋抗风设计.
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