Modeling of composite/concrete interface of RC beams strengthened with composite laminates

In this paper a finite element model for predicting shear and normal stress es in the adhesive layer of plated reinforced concrete beams has been devel oped. The numerical results carried out agree with those obtained in previo us studies by other authors. It is found that shear stresses and high conce ntrations of peeling forces are present at the ends of the plates when the composite beam is loaded in flexure. These concentrations can produce prema ture failure of the strengthened beam because of debonding of the plate or cracking of the concrete cover along the level of internal steel reinforcem ent. The numerical simulation captures the actual interfacial stresses and, in particular, the maximum values of shear and normal stresses. (C) 2000 E lsevier Science Ltd. All rights reserved.