2014 Fiscal Year Final Research Report
Development of hybrid fiber reinforced polymers and strengthening technique with externally bonded prestressed FRP
| Project/Area Number |
24760352
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Civil engineering materials/Construction/Construction management
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| Research Institution | Meijo University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | コンクリート / 連続繊維複合材 / 補修・補強 / 表面接着 / 曲げ復元力特性 / 接着端部の省力化 / 緊張装置 |
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| Outline of Final Research Achievements |
The procedure for upgrading concrete beams with bonded prestressed basalt fiber reinforced polymer (BFRP) rods has been established and the practical prestressing system is developed considering workability and material costs. The procedure and the prestressing system are used on this study, and the higher usability is confirmed. The strengthening effect on restoring force capacity of RC/PC beams with using prestressed BFRP rods are investigated experimentally. In order to avoid a premature debonding of BFRP, the shear stress caused by FRP prestressing should not exceed the interfacial strength. In this study, the evaluation formula of the ultimate value of shear stress at the end of FRP is proposed based on the existing theory. The mechanical properties of the adhesive interface at the ends of FRP rod bonded to concrete was evaluated by the experiments considering different test methods. Moreover, the prestressing system of the BFRP rod is developed.
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| Free Research Field |
建設材料学
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