ABSTRACT
Abstract Strengthening of concrete structures in situ with externally bonded fiber-rein forced plastic (FRP) using epoxy resins appears to be a feasible way of increasing the capacity and stiffness of existing structures. A series of thirty-two 70x70x280mm beams strengthed with FRP plates were tested up to failure under four-point bending. The loaddeflection curves were measured and compared with the predicated values, to study the efficiency of the different two-component epoxy and FRP types. For experimental determination of the mechanical properties of the concrete/glue/plate interface, a singlelap specimen was used in this study. An iterative analytical model capable of simulating the bond-slip and material non linearity based on the compatibility of deformations and equilibrium of forces was developed to predict the ultimate forces and deflections. Keywords: Adhesives, Beams, Bending test, Epoxy resin, FRP plate, Non linear analysis, Shear test, Shear properties, Slip, Stiffness.
