开洞门式刚架房屋风荷载的数值模拟

Numerical simulation of wind pressures on punch rigid frame

结合风洞模型试验对门式刚架房屋在不同风向来流风作用下的屋面风压进行了数值模拟分析.通过分析比较数值模拟结果和风洞试验结果发现,开洞位置和风向角对轻钢门式刚架的风压具有显著影响,当开洞的大小一定时,越接近屋面的位置,对建筑风荷载减小的程度越大,风向角在0°到90°的范围内,随角度的增大,屋面的减压效果越来越明显等相关结论。

Wind-induced pressures on punch rigid frame under various wind directions were predicted by numerical simulation and wind tunnel test. Analysis and comparison of the numerical results with the wind test data indicate that location of punch and wind direction angle have significant effects on the building. When the size of the punch doesn ＇ t change the location of punch near the roof can reduce the pressure on the buildings and from0° to 90°of the wind direction angle according to the angle＇ s increase, the load of the wind on the building decline.