Learning Forum

[agyaw1]

Hi Everyone,

I am modeling a large concrete structure (40 ft long, 20 ft deep, and 3 ft thick) with reinforcement. Before modeling the exact structure, I created a test beam (10 in wide by 18 in deep) with three #9 rebars. I defined it as reinforcement as line body and assigned the cross-section, but after meshing, I cannot see the rebar and concrete  sharing mesh nodes and contact surfaces. Can I trust the results of the beam model? Is it necessary for the rebar and concrete to share nodes during meshing?

Data after analysis are close enough but i need confirmation to model real structure.

 

[Erik Kostson]

Using reinforcement Model type is fine for rebar and the way to do it (no need to have shared nodes, or contacts).

Finally for a whole workflow and set up, see a tutroial I made some time ago:

https://innovationspace.ansys.com/forum/forums/topic/how-can-we-model-failure-in-reinforced-concrete-rc-slabs/

[agyaw1]

Hi Erik,

Thankyou for your conformation regarding rebar. but one more question Just like REINF264 element,  SOLID185 is used as default? If not How to use SOLID 185 element?

Regards,

Ashok 

[Erik Kostson]

Hi

We do not have to use hex8 solid185, the default is hex20 solid186 which you use - I just showed it in my tutorial because it helps when models are large (less dof and nodes with hex8 solid185).

If you want to use it still see image 7 or slide 8 called slab for the settings (El. Order = Linear)

All the best

Erik

[agyaw1]

Hi,

Here I mentioned all the images of the model. Concrete is cracked in this situation, so the result doesn't match the theory. I saw your tutorial and inserted the command in the solution, but there wasn’t any change in the answer. Specifically, can you help me in which section I need to change or add a command to model a reinforced concrete beam? I am trying it in a beam model, but my actual structure is different. Thank you.

Ashok