Thank you so much for your constructive comments on my post, and I apologies for the delay in getting back to you. Here is what I have been doing; I defined the material properties of steel by using the Engineering Data as you mentioned and I added the multilienear model as you suggested to define the stress strain curve of steel with respect to temperature. As a result, it worked and defined well. For the concrete, I used the Engineering Data too to define its properties as well as APDL commands to select the proper element (Solid65). Finally, for the steel rebars, I did the same as the concrete. However, I selected Link180 element for it. Then, I joined the concrete with the rebars by writing some mechanical commands ( Attached).
Now, what I am trying to do here is to run the model till deflection failure. For your information, I already performed an experiment and have its data, so I am expecting the failure to occur within an hour after loading the model with a constant load (800 KN). Initially,I was using Transient Workbench until a friend of mine who advised me to shift to Static workbench since I have a constant load.Hence, I did it.
Here is the thing now, I have ran the model just for 5 seconds (Simulation Time) as a test, and it takes at least 2 hours and eventually, I keep receiving an error, either (The Element has been highly distorted) or(The element ''Solid185'' is turning inside out). So, I have refined the mesh(Attached), checked the contact pairs, and still receiving the same errors.
My questions now are, can I really use the Static Workbench instead of the Transient Workbench for my simulation since the Static is a bit faster? If so, how can I set the analysis to be ran for an hour or till failure? FYI, I used just one step and set the end time as 3600 sec (1 hr) (Attached)
2- How can I overcome these errors and if there are more solutions that I can do further, please suggest.
Thank you so much for your help and it is really appreciated
Connecting the concrete and the steel rebars together commands: