等温条件下における木材腐朽の進行と予測モデルの検証建築外皮の湿害に対する評価手法の開発　その2

摘要

This study focuses on clarification of wood decay process and verification of a prediction model under isothermal conditions. After moisture properties of decayed wood were investigated, wood decay tests considering moisture balance were implemented with the following conditions; one is stable test with multi-layer wood samples under constant relative humidity; the other is dynamic test with single-layer wood samples under variable relative humidity. Progress of the wood decay for the internal direction was demonstrated in the stable test, and impacts of grain on the moisture distribution of the multi-layer wood samples were observed. The results of the dynamic test indicated that wood decay process was temporarily suspended during hygroscopic conditions. The calculation results by the prediction model could simulate aforementioned phenomena related to both mass loss and moisture content of the wood samples. Additionally, accuracy of the prediction model was discussed in comparison to the results of the decay tests.%1．序建物のサステナビリティの向上や中古住宅市場の活性化の観点から住宅の長寿命化の検討がなされておりl）、50年、100年といった期間の躯体耐久性の確保や、定期的な修繕計画を考慮した評価法の確立が求められている。特に木造住宅に関しては、省エネ性能や耐震性能向上に伴い多様な材料や工法が開発されており、仕様の変遷に対応しうる評価手法が必要とされている。