屋脊及出山构造影响低矮建筑屋面风压特性研究

Research of Wind Pressure on the Roof of Low-rise Buildings Influenced by Ridge and Protruding Gable Wall Structures

基于Fluent RNG k-ε湍流模型,以风向角为变量,研究屋脊和出山高度变化影响无屋脊硬山、有屋脊硬山、无屋脊出山和有屋脊出山等4类屋面的风压变化规律.结果表明：来流风向对4种屋面风压影响明显,屋脊高度在0.00-0.24 m时,迎风屋面平均风压明显增大,而随着屋脊的继续增高（0.24-0.36 m）,迎风区体型系数也进一步增大;出山的存在可减轻山墙端风压,而出山的高度变化对屋面风压的影响较小.

Based on the Fluent RNG k-ε turbulence model, the wind angle was used as variables to study the variation of ridge and protruding gable wall height effects on law of roof pressure of four types of roofs, which were roofs with flush gable wall and with/without ridge, and roofs with protruding gable wall and with/without ridge.The results show that the wind direction of flow effect on wind pressure of four types of roofs obviously, ridge height from 0.00-0.24 m, the mean wind pressure of the windward side of roof increases obviously, and as the ridge continue to glow（0.24-0.36 m） , the shape coefficient of windward area also has further increase. The existence of protruding gable wall reduces the wind pressure of the roof gable ends. However, the variation of the height of protruding gable wall affects the roof pressure slightly.