In ABAQUS, how to set failure for the analysis of RC Slab

Iam modeling and analysing a simply supported RC Slab using ABAQUS 6.8.2 with static Riks Concrete Damaged Plasticity. My results show that the behaviour of the deformation seems to continue up to 1000mm. My query is that how to set ABAQUS so that the RC slab will fail in a realistic manner either in crushing (compression) or cracking (tensile failure) with reasonable maximum deflection value. Please let me know how to fix this problem. Thanks