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NUMERICAL MODELLING OF CONCRETE BEAM REINFORCED WITH FRP BARS SUBJECTED TO BENDING UNTIL FAILURE

The topic of this paper is numerical modelling of concrete beams reinforced with FRP reinforcement and comparison of the results with experimental ones. Numerical models of concrete beams subjected to bending until failure, reinforced with steel, GFRP or CFRP reinforcement have been made. Thefinite element method was used, and the models were made in Midas FEA software. Concrete is modelled by the total strain crack theory. A smeared cracks model was used. Steel is modelled as Von Mises material, while FRP behaviour is linear elastic. The interface between the reinforcement and the concrete was also modelled, as bond – slip function. The goal is to compare the results obtained by numerical models with the results obtained by experiments, which were elaborated in previous work of first author. Experimental results contain material properties of used materials: concrete, steel and FRP reinforcement and bond slip behaviour between reinforcement and concrete. The results showed that it is possible to obtain similar results obtained by experimental research, but very important is knowledge of material behaviour and modelling of it.

reinforced concrete, FRP, bending, experimental results, numerical analysis

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