不同坡角低矮建筑屋面局域风压极值分布规律研究

Study on Distribution Law of Local Wind Pressure Extremum on Low Building Roof with Different Slope Angles

针对4种不同坡角、缩尺比为1∶20的双坡低矮房屋风洞试验刚性模型,以风向角、坡角为变量,重点研究均匀湍流风场下坡角影响双坡低矮房屋屋面区域极值风压的分布规律。研究结果表明:0°~45°风向下坡角对双坡低矮房屋屋面易损区域风压特性影响显著,60°~90°风向下不同坡角房屋易损区域风压特性变化趋势相近,其中30°坡角房屋屋面所受风荷载较小。

For four rigid models of low-rise buildings with different slope angles and scale ratio of 1∶20,the distribution of extreme wind pressure in the roof area of low-rise buildings with two slopes affected by uniform turbulent wind field downhill angle was studied with wind direction angle and slope angle as variables. The results show that the wind pressure characteristics in vulnerable areas of low-rise buildings with two slopes are significantly affected by the wind downhill angle of 0°~45°. The wind pressure characteristics in vulnerable areas of buildings with different slope angles of 60°~90° are similar,and the wind load on the roof of buildings with 30° slope angle is smaller.