Numerical analysis of flexural reinforcing behavior of FRP sheet for damaged RC beams

In order to establish a numerical analysis method for evaluation of the flexural reinforcing effects of fiber reinforced polymer (FRP) sheet for the damaged RC beams, a 3D nonlinear FE analysis method is proposed. In this paper, both smeared and discrete cracking models for concrete are applied. For numerical simulations, two damaged beams are prepared which are pre-loaded up to point of: 1) the rebar yield point; and 2) the residual displacement reaching 0.4 % of the clear span length. Those are reinforced by bonding Aramid FRP (AFRP) sheet and statically reloaded up to reaching the ultimate state. The numerical results are compared with the experimental ones. From this study, it is confirmed that applying the proposed numerical analysis method, flexural reinforcing behavior of the damaged RC beams due to bonding AFRP sheet can be better simulated