Study on degradation mechanism for wooden structures in consideration of hygrothermal conditions

2016 Fiscal Year Final Research Report

• Project/Area Number: 26289206
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Architectural environment/Equipment
• Research Institution: Ashikaga Institute of Technology
• Principal Investigator: Hiroaki Saito 足利工業大学, 工学部, 准教授 (20597827)
• Co-Investigator(Kenkyū-buntansha): 森 拓郎 京都大学, 生存圏研究所, 助教 (00335225) ; 堀澤 栄 高知工科大学, 工学部, 准教授 (20368856) ; 小椋 大輔 京都大学, 工学(系)研究科(研究院), 准教授 (60283868)
• Research Collaborator: Doi Shuichi 元筑波大学, 大学院・生命環境科学研究科, 教授 ; Miyamura Masashi 国土技術政策総合研究所, 主任研究官 ; Oba Yoshikazu 株式会社住宅検査保証協会, 代表取締役
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 木材腐朽 / 熱水分同時移動 / 劣化 / 木造 / 住宅 / 外皮

Outline of Final Research Achievements

In this study, in order to clarify wood degradation process in actual building environment, wood decay tests under nonsterile conditions and validation of a prediction model were performed. The wood decay tests using rain water for infection with decay fungi showed that dispersion for decay rate occurred by contamination such as mold fungi. However the results indicated a possibility that maximum decay rates of wood in nonsterile conditions are equivalent to those of wood samples inoculated with pure-cultured decaying fungus under the sterile condition. Additionally the prediction model using measured hygrothermal conditions could approximately simulate the maximum decay rates. It was confirmed that the prediction model can be adapted to durability assessment for building envelope in actual construction site.

Free Research Field

建築環境工学