2021 Fiscal Year Final Research Report
Development of novel rigid joint for timber frame structures employing pre-stressing
| Project/Area Number |
19K06180
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 40020:Wood science-related
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| Research Institution | Kindai University (2020-2021)
Tokyo Metropolitan Industrial Technology Research Institute (2019) |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
若島 嘉朗 富山県農林水産総合技術センター, 富山県農林水産総合技術センター木材研究所, 副主幹研究員 (10446635)
北守 顕久 大阪産業大学, 工学部, 准教授 (10551400)
清水 秀丸 椙山女学園大学, 生活科学部, 講師 (70378917)
寺西 正輝 新潟大学, 研究推進機構, 助教 (80798322)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | プレストレス / 応力緩和 / 内力係数 / LVL / 圧縮木材 / 劣化促進処理 |
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| Outline of Final Research Achievements |
The long-term stress relaxation behavior and joint performance of prestressed timber joints were investigated experimentally and analytically. Our findings were as follows. By applying prestress in the fiber direction of LVL and compressed wood, we discovered the possibility of maintaining high pre-stress even under harsh environmental conditions. It was also found that the load factor, which is the ratio of the increase in the bolt axial force to the external load, is an important factor in the evaluation and design of joining performance.
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| Free Research Field |
木材工学、木質構造学
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| Academic Significance and Societal Importance of the Research Achievements |
プレストレスを与えた木材接合部は、温湿度等の環境条件によってプレストレスが減少し、長期的にプレストレスが維持できないものと考えられてきた。このような状況下で本研究により、プレストレスを長期的に維持する条件が示される共に、接合性能評価・設計において新しい考え方が示され、学術的、社会的に意義のある成果が得られた。
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