Abstract
This study presents a new shear strength model for reinforced concrete beams strengthened with embedded through-section fiber-reinforced polymer (ETS-FRP) bars, accounting for three potential failure modes: shear compression, shear tension, and shear-balanced failures. The bonding-based analysis for ETS-FRP retrofitting elements is integrated into the developed shear approach. Validation against available test data reveals that the developed model outperforms existing methods in predicting the shear capacity of ETS-FRP-intervened beams. The developed computation technique also demonstrates consistent accuracy across a broad range of design variables and adheres to all upper shear limits in the design codes. To serve practical use, this study provides specific design strategies and perspectives for optimizing ETS-FRP strengthening systems and determining appropriate shear reinforcement amounts for ETS-retrofitted beams.
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