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Abstract Abstract： The paper aims at the drawbacks and difficulties in nonlinear numerical simulation of pasting FRP to reinforce concrete arch structure. Based on 3 FRP reinforced test of concrete arch structure, it introduces technologies such as the concrete plastic damage model, cohesive behavior, embedded and model change etc into nonlinear numerical analysis, realizing the simulation of some key mechanical properties such as concrete damage, FRPconcrete interface paste slip and initial load, etc. The comparison of reinforced test and numerical simulation that the ultimate bearing capacity of the structure by adopting cross section reinforcement, is increased by 14.47%, the ultimate bearing capacity of the structure is increased by 27.60%, and analytical error of cracking load is within 7.79%, analytical error of ultimate load is relatively small, and the maximum value is 4.88% which shows that the numerical analysis method proposed in the paper is feasible, and can provide basis for further research on pasting FRP to reinforce concrete arch structure.
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