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The main aim of this research is to study the structural behaviour of reinforced concrete beam strengthened in bending with carbon fiber reinforced polymer (CFRP). The three groups of CFRP-strengthened beams with different loading conditions were simulated and analyzed by using finite element method. The obtained results in each group were compared with experimental data. The curves of load vs. mid-span displacement were plotted for all types of CFRP beams. It was shown that there are good agreements between experimental data and the FE results. The numerical failure modes were matched with non-shear beams which are demonstrated tension and compressive modes in terms of plasticity failure. The present simulation can be used as a practical work in civil and mechanical engineering for these types of materials which are used to increase the strength of concrete beams. 

reinforced concrete beam, damage plasticity model, failure analysis, CFRP.