| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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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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