| Title |
Evaluation of Snow Load Using a Snow Simulation Wind Tunnel for Single Span and Multiple Span Green House Roofs |
| Keywords |
Green Houses ; Snow Load ; Single Span Green House ; Multiple Span Green House ; Snow Simulation Wind Tunnel |
| Abstract |
Heavy snowfall has damaged standalone green houses and the typical pattern was, regardless of area, M?shaped collapse resulting from the breakdown of roof rafters by excessive snow load on the roof. As to the pattern of damage to multi?span green houses by heavy snowfall, excessive snow load worked on the hollow parts and pressed the rafters and, as a result, the columns were broken and tilted. This study purposed to analyze snowdrift pattern by conducting a snow simulation wind tunnel experiment on single?span and multiple?span green house roofs using artificial snow. Snow depth was larger on single?span roofs than on multiple?span ones. However, Snow depth on the hollow part between two houses in multiple?span green houses was larger than that on the top of the roof. When three standalone green houses were deployed in parallel, the middle one showed 18?20% larger snow depth than the others. The largest snow depth was measured on the top of each green house, and snow depth at the part where wind direction changed was 20?30% less than that at other parts. |