2021 Volume 2021 Issue 8 Pages 191-198
The design strength of a greenhouse constructed using scaffold materials was analyzed by three-dimensional structural analysis under required wind and snow loads. The greenhouse was built on an empirical research site along the southern coast of Iwate Prefecture and published as a construction manual, In addition, we calculated three strengthened models to provide a reinforced structure that is capable of withstanding heavier snowfall. The original model of the greenhouse structure was resistant to a snow load of 40 cm in depth as well as a wind load of 35 m/s. However, under a snow load of 67 cm in depth, even when no structural member of the greenhouse exceeded the allowable bending stress, the original model needed an additional supporting structure. This was because the deflection of the rafter significantly exceeded the guideline for deformation. The strengthened models that added post, beam, and strut support to the rafter into the original structure without an interior column successfully suppressed the deformation of the rafter. However, under a snow load of 75 cm in depth, a particular part of the connection member subject to excess bending might be damaged. The reinforcement employing the interior column to the structure,even when the column span is widened from 1.8 m to 2.0 m,may have still greater endurance to a heavy snow area.
