Numerical investigations of the effect of CFRP on the impact resistance of concrete under high-velocity impact

This study presents a combination of concrete and carbon-fiber-reinforced polymer (CFRP) to improve the impact resistance of concrete structures under high-velocity impact impacts. An ogive nose-shaped projectile-impact experimental study is conducted on 300 x 300 x 150 mm concrete panels, and the concrete panels are strengthened with CFRP sheets or grids. Numerical modeling is performed to predict the depth of penetration (DOP) and damaged area of the concrete panel. The explicit algorithm of the Abaqus software is employed to simulate the high-velocity impact. The projectile and concrete are modeled as deformable bodies using the Johnson-Cook and Concrete Damage Plasticity models, respectively. The Hashin model was used to estimate the damage to CFRP. The simulation results showed deviations in the prediction of DOP and crater damage that were within a reasonable range, less than 10%. Moreover, the results showed that the panels with CFRP sheets and grids absorb the impact energy well. The numerical simulation results are in good agreement with the experimental data, suggesting that the proposed simplified model has high reliability in the high-velocity impact analysis.