Study on control of snow load on roof

屋面雪荷载控制研究

• 批准号: 05650541
• 负责人: TOMABECHI Tsukswa
• 金额: $ 1.47万
• 依托单位: Hokkaido Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650541/
• 关键词: snow on roof; snow load on roof; control of snow load; disposal of snow; roofing material; adhesion strength; removal sliding of snow; meteorological property; 模型雪; 滑落雪現象; 屋上積雪荷重; 屋根雪; 屋根形状; 制御

A technical knowledge for controlling of snow load on roof with a large-scale building in a heavy snow fall regions was made clear. In case of estimating the snow load from the snow depth on ground, it was estimated to high precision by using "the average velocity of wind about the day in equal to or more than 10-cm deep in snow depth of a day" than "the average velocity of wind in January and February" which is used the standard of architectural institute of Japan. There was proved from the result which analyzed wind velocity during several-day snowfall. Namely, the snow load was increases behind the day that there was an equal to or more than 10-cm deep in snow depth of a day.As the technique to estimate a accumulation shape of snow on roof, it measured the descent of wind on roof surface by a wind tunnel experiment, and it verified. It was possible to do high precision estimation by using the technique and the powder wind tunnel experiment.We exhort to control the snow load method of regular removal sliding at large-scale building. Therefore, it made a technique of material selection to reduce the adfreeze resistance interface the roofing and the snow. The roughness and water repellecy of the surface of a material by which the adfreeze strength can be estimated became clear. As for this thing, we conclude that adfreeze strength is influenced by the actual adhesion area.It verified the partial removal of snow on the roof which becomes a problem with the removal situation of the snow at the actual building. It made that the sliding resistance which acts there at each roof part was different clear. It established the theory that reproduces a partial removal of snow based on the result of sliding experiment.

明确了大雪地区大型建筑屋面雪荷载控制的技术认识。在根据地面上的雪深估算雪荷载的情况下，通过使用“在一天的雪深中等于或大于10 cm的一天的平均风速”比使用日本建筑学会标准的“一月和二月的平均风速”高精度地估算雪荷载。通过对连续几天降雪过程中风速的分析，证明了这一点。也就是说，当一天的积雪深度等于或大于10 cm时，雪荷载会在一天之后增加。作为估算屋顶积雪形状的技术，通过风洞实验测量了屋顶表面上的风的下降，并进行了验证。利用该技术和粉末风洞试验，可以进行高精度的雪荷载估算，并提出了控制大型建筑物规则滑移的雪荷载方法。为此，提出了一种减少屋面与雪界面抗冻性的选材技术。材料表面的粗糙度和斥水性可以用来估算材料的抗冻强度。针对这一点，我们得出了粘结强度受实际粘结面积影响的结论，并结合实际建筑物的除雪情况，验证了屋顶部分除雪存在的问题。这使得作用在顶板各部位的抗滑力明显不同。根据滑动试验的结果，建立了再现局部除雪的理论。

项目成果

Ito T,Tomabechi T et al.: "Study on the adfreezing properties between roofing materials and snow on roof" Journal of Structural and Construction Engineering, Architectural Institute of Japan. No.470. 43-51 (1995)

Ito T、Tomabechi T 等人：“屋顶材料与屋顶雪之间的广告冻结特性研究”日本建筑学院结构与建筑工程学报。

苫米地司,伊東敏幸,他: "大規模構造物における屋根雪処理に関する研究" 寒地技術論文・報告集. Vol.10. 307-310 (1994)

Jiji Tomome、Toshiyuki Ito 等人：“大型结构屋顶积雪处理研究”，寒冷地区技术论文和报告，第 10 卷，307-310（1994 年）。

伊東敏幸,苫米地司ほか: "屋根葺材と屋根雪との凍着性状に関する研究" 日本建築学会構造系論文集. 470号. 43-51 (1995)

Toshiyuki Ito、Jiji Tomome 等：《屋顶材料和屋顶雪的冻结性能研究》日本建筑学会结构工程学报第 470. 43-51 期（1995 年）。

Tomabechi T,Ito T: "Fundamental study on control of snow load on the roof" Journal of the Japanese Society of snow and ice. Vol.11, No.3. 215-222 (1994)

Tomabechi T，Ito T：“屋顶雪荷载控制的基础研究”日本冰雪学会杂志。

Tomabechi T,et al.: "The applicability of using model snow with wind-tunnel experiments Part3 Relation between snowdrift formation and flow of wind" Proceedings of Hokkaido branch of Architectural Institute of Japan. NO.69. 85-88 (1996)

Tomabechi T,et al.：“使用模型雪进行风洞实验的适用性第3部分雪堆形成与风的流动之间的关系”日本建筑学院北海道分会论文集。