Abaqus Concrete Load Deflection

[RCing]

Hi, I am trying to model a cantilever-reinforced concrete slab with in-plane displacement loading along one edge while the other edge is fixed. I am using CDP for concrete and bilinear for reinforcement. Two layers of reinforcement run in both directions. This is a 3D model with C3D8 for concrete and T3D2 for reinforcement. One of the problems I am facing is that even if I apply a very large displacement, the load-displacement does not show a drop. It was my understanding that the capacity of the slab is indicated by the load after which we see a drop in the load-displacement. Can I please get some help regarding this?

 

[FEA way]

It's hard to say without seeing the model and knowing the details of the analysis but if you have any doubts regarding the material model, it's good to perform a single-element test on it.