Boundary element analysis of FRP-concrete delamination

The FRP-concrete delamination problem is studied making use of BEM. Cohesive crack model has been adopted for the interface, whereas linear elasticity is used for the two materials outside the process zone. Numerical analyses are carried out by means of symmetric Galerkin boundary element method for cohesive interfaces, adopting the arc-length technique to follow the equilibrium path beyond its critical point. Two different test setups have been numerically simulated and results are compared with experimental tests. For bond lengths longer than minimum anchorage length, tests may exhibit a snap-back branch after the attainment of the maximum force.