Bond Strength between FRP Laminates and Concrete Led by the Equivalent Bond Stress Block Method

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  • 等価付着ストレスブロックによる連続繊維シートとコンクリートの付着強度算定式

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This research features the bond strength between FRP laminates and concrete. To develop a simple prediction formula for bond strength, the bond stress-slippage model proposed by the authors (Popovics model) is considered. The equivalent bond stress block (EBSB) is newly defined as the area of EBSB has same area of the Popovics model. Bond stress is assumed to a constant value by EBSB, strain and slippage of FRP laminates are given by solving a simple second derivative equation. A new prediction formula is proposed, which covers both cases of the ranges of bond length : one is longer than effective bond length and the other is shorter than that. The predicted values show a very good agreement with experimental results.

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