Modelling the behaviour of the bonding of fibre reinforced concrete at the plate end

Neto, Pedro; Vinagre, João; Alfaiate, Jorge

http://hdl.handle.net/10400.26/5136

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Authors

Neto, Pedro

Vinagre, João

Alfaiate, Jorge

Abstract(s)

In this paper, the finite element method is used to analyse the behaviour of concrete externally strengthened by fibre reinforced polymers (FRP). This model aims to analyse the stress distribution in the FRP-concrete interface at the plate end of a bending beam. The behaviour of the concrete-poxy-FRP arrangement is modelled with interface elements with initial zero thickness, using a discrete crack approach. A localized damage model is adopted for the interface and a parametric study is performed to approximate the material parameters adopted. The importance of each parameter is assessed. This model is subsequently verified using experimental data collected from the literature. Finally, a proposal is made concerning the adoption of a relation GF II/GF for the interface behaviour. Mention is also made to some of the main mathematical models found in the literature, which are compared to the present approach.