2021 Fiscal Year Final Research Report
Establish of estimating method for snow cornice aimed to reduce accident caused by snow removal on roofs
| Project/Area Number |
19K04716
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 23010:Building structures and materials-related
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| Research Institution | Hokkaido University of Science |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 陸屋根建築物 / 雪庇 / 冬期の人身事故 / 北海道 |
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| Outline of Final Research Achievements |
In this study, the purpose of this study is to study measures against roof snow that aims to eliminate accidents resulting in injury or death due to roof snow in Hokkaido. Experiments and outdoor observations were conducted. In the snowstorm wind tunnel experiment, a cornice reproduction experiment was conducted to clarify the wind speed dependence of the cornice, and an empirical formula for estimating the snow accumulation rate of the eaves from the wind speed of the eaves was derived. In outdoor observation, aerial images were taken of two-story and three-story buildings, and photogrammetry of the snow depth on the roof was performed. As a result, it was confirmed that the smaller the wind speed, the more the cornice was formed. We constructed a method to estimate the snow depth on the roof from meteorological data using the results of snowstorm wind tunnel experiments and outdoor observations.
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| Free Research Field |
建築構造
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の成果は、雪庇形成の風速依存性を明らかにし、気象データを用いて屋根上積雪深を推定して雪庇の形成箇所を明らかにすることを可能にしたことである。これは、雪庇の危険性を明確にし、危険な雪庇のみを処理することで雪下ろしによる事故を低減することが可能となる。また、市街地では屋根面の気流が乱れ、冬期主風向の風下側に雪庇が形成されるとは限らないが、本研究で得られた成果によって雪庇の形成箇所を適正に予測することが可能になり、雪庇の危険性を適正に評価することが可能になる。以上のことから、本研究の成果は、北海道における安心・安全な冬期の生活に資するものであり、社会的意義は大きいものであると考える。
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