Hello

I have modeled a RC(Reinforcement Concrete) Frame concrete in Abaqus , so i have some questions about modeling below :

1- How to define a concrete fixed joint between beam and column?

2-How to impose the two concentrating load on beam that locate in a distance of one-third from the two beam ends ?

3-I have modeled CDP model in compression base on Mander and tension based on Collins&Mitchell . However i faced some issue the fact that , the ultimate strain has been calculated nearly 0.0041 (confined Concrete) and a relation to earn the Damage parameter of both compression and tension?

4-How to calculate the maximum strength of steel bar which in could model the plastic behaviour of that?(it has not been mentioned in my article)

I would be grateful , if someone explain accurately and practically?

I studied alot abaut the above issue that i mentioned and the friends in this site have suggested articles relasted to those of issue , but at the moment i need a practical help.

Thank You so much.

Best Regard.