[ Post Punching of flat slab ]

[ALK2415]

I had some difficulties concerning the post-punching behavior of flat slab [reinforced with tensile and Integrity steel rebars]
Different Solvers were used; Standard static and dynamic implicit type also. And most of times, solutions ends due to instabilities errors.
Now I am trying different Concrete S-E models
Do any one done this solution before, like to the post cracking of concrete slab and column bearing only by steel rebars [after yielding] ?
And thanks in advance for your assistance ...

 

[FEA way]

Which material model are you using for concrete ? Did you try other methods to reduce/eliminate instabilities ? As a last resort, you could use dynamic explicit analysis (with proper settings to make it quasi-static).

 

[ALK2415]

I did used CDP Model
with following details;

 

[FEA way]

I don't think there's a need for a different software. Abaqus (especially Explicit but you have to carefully check the results) should be sufficient for this purpose.