Research Article Finite element modeling of crack propagation in RC beam by using energy approach

In present study interface element with nonlinear spring is used to simulate cohesive zone model (CZM) in reinforced concrete beam in Mod I of crack propagation. Modified crack closure integral method is implemented to model propagation of fracture process zone (FPZ). This model, energy can calculate energy release rate in concrete by using new method in energy approach. Energy dissipation rate by steel bars is obtained to affect on crack propagation criterion to implement in finite element method. The results show that proposed model does not depend on mesh size