ABSTRACT
ABSTRACT: In this work, the ABAQUS Concrete Damaged Plasticity (CDP) model is investigated both theoretically and numerically. The interrelations between this model and its two precursors, i.e., Barcelona model (Lublinear et al. 1988) and Lee & Fenves (1998) model, are clarified. In particular, they are analyzed with respect to the issue of mesh size dependence. On the one hand, as damage evolution is not accounted for in the definition of fracture energy, Barcelona model (Lublinear et al. 1988) and Lee & Fenves (1998) model cannot suppress the issue of mesh-size dependence. On the other hand, an incorrect definition of the cracking displacement is used in the ABAQUS CDP, resulting in not only the issue of mesh size dependence, but also unit system sensitivity. Accordingly, the input data of stress and damage variable necessary for the ABAQUS CDP model can only be given in terms of the cracking strain, whereas the ones defined in terms of crack displacement should be used with great care unless this issue is removed in the future release.
