木材の年間を通じての変形性状 : 熱・湿気挙動と膨張/収縮特性

概要

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We have recognized that the evaluation of deformation on wooden material in building envelopes is important for a durable design of building envelopes. There ware slight evaluations of deformation on wooden material caused by annual hygrothermal behavior. It is a practical interest that expansion/shrinkage on wooden materials are caused in low moisture content region. In this paper, we analyze deformation on wooden stud in well insulated and air tight building envelope that is caused by annual moisture content variation. We have used wooden materials equilibrated 12-15% weight moisture content (90% relative humidity related with a warm temperature). The wooden stud can be expanded 1% of initial state, during summer. We show additionally that a wooden stud equilibrated 60% relative humidity can be expanded to exceed initial state, during summer. In winter, the wooden stud shrinks utmost 2% in proportion to the decrease of moisture content.
社団法人日本建築学会の論文
2005-01-30