2021 Fiscal Year Final Research Report
Evaluation of sectional forces transfer and establishment of a design method for the combined method of high-strength bolt friction joint and adhesive bonding
| Project/Area Number |
19K04585
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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 22020:Structure engineering and earthquake engineering-related
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| Research Institution | Kansai University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 高力ボルト / 接着 / 補修 / 荷重分担 |
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| Outline of Final Research Achievements |
In this study, the authors attempted to evaluate the stress transmission of the combined joint of adhesive and high-strength bolts as a fundamental study for the repair of steel structures. Specifically, adhesive and high-strength-bolt combined joints were classified as composite or mixed joints, and uniaxial tensile tests, finite element analyses, and theoretical analysis were conducted on a model of a joint type of specimens and the stress transfer mechanism was clarified. The results showed that both composite and mixed joints with adhesive and high-strength bolts had a stress transmission mechanism similar to that of adhesive joints until debonding of patch plates occurred. After the debonding of patch plates occurs, the limit state of adhesive and high-strength bolts combined joint shifted to that of high-strength-bolt friction joining.
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| Free Research Field |
土木工学・構造工学・地震工学・維持管理工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，接着と高力ボルトを併用した当て板補修に対して，接着剤による力の伝達と高力ボルト摩擦接合による力の伝達の挙動を載荷試験，FEM解析および理論的手法を用いて評価した．接着剤が健全ではく離が生じていない場合は，接着と高力ボルトを併用した当て板補修は，接着接合に近いことが明らかになったので，常時の繰返し応力に対しては接着接合による評価ができるため，有効な接着の併用法に繋がる成果であると考えている．
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