摘要
为揭示屋面材料对屋面积雪滑落的影响规律,考虑混凝土、钢、膜与玻璃等常用屋面材料,对不同材料屋面上雪层的最大持水量及屋面-雪层剪切强度展开试验研究,并引入度日模型,建立屋面积雪滑落的判定方法,分析了屋面材料对屋面积雪滑落的影响。结果表明屋面积雪的最大持水量随屋面材料粗糙度的增大而增大;除玻璃外,屋面积雪滑落的临界温度也随屋面材料粗糙度的增大而增大。研究的结果为进一步探索屋面积雪滑落的机理提供重要参考依据。
Considering different roofing materials such as concrete,steel,membrane,and glass that are widely used on building roofs,this paper conducted an experimental study on the maximum water-holding capacity of roof snow layers and the sheer strengths of the snow-roof interfaces to reveal the influence of roof materials on roof snow slid⁃ing.In addition,a degree-day model is incorporated to establish a method to assess the occurrence of roof snow slid⁃ing,and the impact of roofing materials on the roof snow sliding is analyzed.It is indicated that the maximum wa⁃ter-holding capacity of roof snow increases with the increase of surface roughness;the critical temperature for the oc⁃currence of roof snow sliding also increases with the increase of roughness with the glass as an exception.The results may provide the reference for further studies on the mechanism of roof snow sliding.
作者
曹新笠
莫华美
CAO Xinli;MO Huamei(Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education,Harbin Inst.of Tech.,Harbin 150090,China;Key Lab of Smart Prevention and Mitigation of Civil Engineering Disaster of the Ministry of Industry and Information Technology,Harbin Institute of Technology,Harbin 150090,China)
出处
《低温建筑技术》
2024年第3期28-33,共6页
Low Temperature Architecture Technology
关键词
屋面积雪滑落
雪层最大持水量
界面剪切强度
度日模型
屋面材料
roof snow sliding
maximum water-holding capacity of snow layers
interface shear strength
de-gree-day model
roofing materials
