罩棚结构对低矮建筑局部风载影响规律试验

发布时间：2018-06-15 17:29

本文选题：低矮建筑 + 罩棚　；参考：《土木工程与管理学报》2016年06期

【摘要】：采用缩尺比为1∶20风洞试验刚性模型,以风向角及屋面坡角为变量,针对单体低矮建筑及罩棚与低矮建筑组合而成的罩棚式低矮建筑屋面局部风载展开风洞试验研究,采用风压系数差深入探讨B类地貌下罩棚结构对配套低矮建筑屋面迎风屋沿、屋脊及屋面角部等局部测点风压影响变化规律。结果表明:不同风向下罩棚对低矮建筑迎风屋沿处风压的影响随着屋面坡角的增大而减小,对背风屋面各分区的影响较小。随着风向角的改变,迎风屋面靠山墙边缘及角部区域受罩棚影响呈增大趋势。45°斜风向下,平屋面(β=0°)迎风屋沿测点6风压系数变化最大,风压系数差为-2.01。当来流平行于屋沿方向时,罩棚结构对迎风屋沿、屋脊、屋面角部等易损区的风压系数随坡角的变化影响最小。
[Abstract]:Using the rigid model of wind tunnel test at 1:20 scale ratio, taking wind direction angle and roof slope angle as variables, wind tunnel test research is carried out for single low building and the combination of canopy and low building. By using the difference of wind pressure coefficient, the variation law of wind pressure at local measuring points such as roof edge, roof ridge and roof corner is discussed in depth. The results show that the influence of different wind down canopy on the wind pressure at the edge of the low-rise building decreases with the increase of the roof slope angle, but has little effect on the leeward roof. With the change of wind direction angle, the influence of canopy on the edge and corner of windward roof wall is increasing. Under the incline wind direction of 45 掳, the wind pressure coefficient of flat roof (尾 0 掳) along the measuring point 6 is the biggest, and the difference of wind pressure coefficient is -2.01. When the incoming flow is parallel to the direction of the roof edge, the roof structure has the least influence on the wind pressure coefficient with the slope angle in the vulnerable areas such as windward roof edge, roof ridge, roof corner and so on.
【作者单位】：湖南科技大学土木工程学院;
【基金】：国家自然科学基金(51578237) 湖南科技大学研究生创新基金(S140008)
【分类号】：TU312.1

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