Bonding-Based Approach for Calculation of Shear Resistance of ETS FRP Bars in ETS-Strengthened Beams

The shear strength of concrete beams strengthened with embedded through-section (ETS) fiber-reinforced polymer (FRP) bars considering bonding-based approach is investigated in this study. A series of pullout tests was firstly collected to assess the bond response between the ETS FRP rods and concrete. An analytical method for assessing the ETS bars–concrete interfacial profile is then identified. The bond model is then utilized to propose a simple method to predict the contribution of the ETS shear strengthening system. By using bonding-based method, an attempt is made to estimate the ETS FRP shear contribution via the mechanical approach and the regressing approach. The results obtained from this study show that the bonding-based method can provide reasonable predictions for the ETS FRP shear contribution. Further, through model validation against the experimentally accessible data base, the bonding-based method incorporating with the mechanical approach exhibits the powerful estimations of the ETS shear resisting forces in the ETS-strengthened beams.