try t

If it is displacement controlled, the reactions (loads) observed at the supports should logically decrease when cracking occurs.

Alternatively you can try Riks Analysis in ABAQUS to achieve so.

Hi Usman, it is displacement controlled indeed but the reactions only decrease when the bottom reinforcement ruptures.

Can you tell me more about this Riks Analysis? I don't know anything about it.

Thank you!

I think that there may be something missing in the properties of the concrete so that the damage isn't being fully captured (i.e. after cracking/crushing the total reaction goes down very slowly in most cases, if at all!).

I'm defining the following properties:

CDP model

Plasticity:

- Dilation angle = 35°

- Eccentricity = 0.1

- fb0/fc0 = 1.16

- K = 0.6667

- Viscosity = 0.0001

Compressive behavior:

- Stress-strain points in the Popovics formulation (using inelastic strain)

Tensile behavior:

- Stress-strain points in the Nayal and Rasheed curve (4 points defining a curve close to the exponential tension stiffening). I tried using the fracture energy as well, obtaining similar results.

I am not defining tension/compression damage since I'm doing a monotonic analysis, but I did try defining it once and it made little difference.

If there is something else I need to define, please let me know.

Thank you!

Best,

Sálvio.

hi Sálvio , did you solved that problems? what amplitude you're using for?