A 1D finite element model for the flexural behaviour of RC beams strengthened with MF-FRP strips

This paper presents a new Finite Element (FE) model capable of simulating the flexural behaviour of RC beams or slabs strengthened by using MF-FRP strips. Nonlinear bearing-stress-interface-slip laws are considered to describe the behaviour of the mechanical connection between the RC beam and the FRP strip, whereas well-established stress-strain relationships are adopted to model the behaviour of concrete, longitudinal reinforcing steel rebars and composite laminate. The model has been validated by comparing the numerical predictions with several experimental results found in the scientific literature. A good agreement has been observed between experimental and numerical results thus confirming the accuracy of the proposed model.