Establishment of a Conservative Reinforcement Method for Traditional Wooden Buildings Utilizing Non-Destructive Degradation Diagnosis

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K14872
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 23010:Building structures and materials-related
• Research Institution: Akita Prefectural University
• Principal Investigator: Ohtsuka Akiko 秋田県立大学, システム科学技術学部, 助教 (00825101)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 非破壊診断 / 劣化調査 / 超音波試験 / 穿孔抵抗 / 文化財建築 / 木造 / 補修 / エポキシ樹脂

Outline of Final Research Achievements

In this study, we found that there are differences in the suitable portable deterioration diagnostic equipment depending on the degree of deterioration and the species of trees. And, it was clarified that more accurate deterioration diagnosis was possible by the selective use of diagnostic equipment, and the proper measurement method and analysis method were proposed. In addition, the threshold value by the database of strength estimation was set for 3 kinds of softwood. As for the reinforcement method, the type of resin used for the restoration of the cultural property in the past and the method of use were classified in the past research, the repair effect by the selected epoxy resin and polyurethane system was examined, the mechanical effect was verified, and the repair method by injecting epoxy resin mixed with cellulose fiber into the wood was examined, and the recovery of the bearing capacity to the sound material was confirmed.

Free Research Field

保守・保全

Academic Significance and Societal Importance of the Research Achievements

こちらの研究は文化遺産の保護から環境保全まで多岐にわたる社会的意義を持っている。①文化財保護への貢献: 木材の劣化診断と補修方法の向上は、文化財や歴史的建造物を長く維持することが可能となり、文化財保護への貢献が期待される。②建築物の安全性向上: 劣化木材は建築物の安全性に影響を与える可能性がある。適切な診断と補修により、建築物の耐久性や安定性向上への寄与が可能となる。③環境保全: 補修において使用されるエポキシ樹脂やポリウレタン系樹脂などの素材選定や混入したセルロース繊維の効果検証は、環境に配慮した補修方法の開発につながる。環境負荷の低い補修方法を提案することで、持続可能な文化促進が見込める。