Numerical simulations using the non-linear finite element method (FEM) are a well-established technique to model the full spectrum behaviour of reinforced concrete (RC) members strengthened with fibre reinforced (FRP) composites. Numerical models utilising parametric studies can reduce the number of experimental tests if adequately formulated according to the experimental data. The paper presents a methodology for the modelling and verification of FRP-to-concrete joints anchored with bi-directional fibres. Interface elements are gsed to simulate bond properties between multiple layers of FRP sheet and laminates in 3D. A method is proposed to calibrate relevant constituent material models for input into the numerical platform. Using the proposed modelling approaches, the progressive delamination of the FRP material from the concrete substrate has been replicated with close proximity to the experimental data. The results have been generated for future use and to inform the development of future modelling approaches and design formulations in the area of FRP anchorage systems.
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