Wind tunnel test on wind load characteristic of complex plan T-shaped low-rise gable roof buildings was presented .The change laws of wind pressure coefficient of roof and shape coefficient of each face were obtained .The computational fluid dynamics software FLUENT was employed to establish the numerical wind tunnel model , and the numerical simulation results agreed well with that of wind tunnel test .Then the detailed parametric analysis was performed for wind pressure coefficient and shape coefficient of roof .The parameters included wind attack angle ,roof pitch ,eave height ,building geometry dimension and roof shape .The results show that roof pitch and wind attack angle have significantly effects on wind pressure coefficient of roof .Under the effect of different wind attack angles ,high negative pressure will be formed on eave and ridge of windward roof . The distribution of wind pressure coefficient of roof in the leeward area is uniform .When the roof pitch is 30° ,high negative pressure will be more easily formed in the leeward area of hip roof ,so that the local area is easier to be destroyed .%对复杂体型的平面T形低矮双坡屋面房屋的风荷载特性进行了风洞试验研究,得到了屋面风压系数以及各屋面体型系数的变化规律;采用计算流体力学软件FL U EN T建立了数值风洞模型,在数值分析结果与风洞试验结果吻合良好的基础上,对影响屋面平均风压系数及体型系数的风攻角、屋面坡角、檐口高度、房屋几何尺寸和屋面形式等参数进行了详细分析.结果表明:屋面坡角和风攻角对屋面风压系数的影响显著;在不同风攻角作用下,迎风屋面屋檐及屋脊附近形成较高负压;当屋面处于背风区域时,风压系数分布较均匀;四坡屋面坡角为30°时屋脊背风区域易形成较大负压,局部更易遭受破坏.
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