INFLUENCE OF SURFACE ROUGHNESS OF MEMBRANE MATERIALS ON SNOW-SLIDING

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Publication year 1995
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Title INFLUENCE OF SURFACE ROUGHNESS OF MEMBRANE MATERIALS ON SNOW-SLIDING
Author Tsukasa Tomabech,Toshiyuki Ito,Masahiro Takakura,Hideharu Yamaguchi
Summary The purpose of this paper is to propose a reduction method of snow load on a roof by sliding snow with a heater. According to recent papers， snow-sliding is known to be much influenced by the adfreezing force and friction between the Snow and membrane the roofing materials. We examined the influence of the surface properly and the condition of snow on the force.
The results may be summarized as follows:
1) The friction was influenced both by the surface roughness of roofing martials and by the snow-water content.
2) The adfreezing force was influenced by the contact angle between the water/materials and the surface roughness.
Therefore，necessary heat capacity should be different with each roofing material to keep snow-sliding smooth with a heater. If these are taken into consideration，the reduction of snow load on a roof is possible.