Learning Forum

[a.m.aanikce]

I am investigating structural behaviour with the help of engineering simulation of the critical areas of a project such as transfer slab, transfer girder, slender column, corbels, columns changing shapes etc. I want to use the confinement effect of the concrete and unconfined impact on the same model. 

Moreover, I am new to engineering simulation and recently finished the ANSYS course from the Edx.

However, this type of problem was not in the scope of the course. It will be helpful if anyone experienced in engineering simulation of concrete with reinforcement can provide some guidance and name some textbook or tutorials for my improvement.

[a.m.aanikce]

I am having trouble with REINF264. When I use it with Concrete MW model in 2020 R2 the model do not converges.

[Erik Kostson]

nnVery nice to see that you are using a good workflow using the 2020 R2 inbuilt reinforcements (see how you define/set reinforcements in the image below) and the MW material model that behaves well for many different types of concrete failure. Also stay with MW for now and forget for the time the micro plane model - the MW should be good for many type of failures in concrete (flexure, shear, tensile,..) and it is easy to get parameters (unlike the micro plane models). Just consider micro plane if it is not possible to get good results with MW.nnNow concrete models can be hard to converge so I would suggest first to use auto time stepping on and use say 100 initial and minimum substeps, and say 1E5 for maximum substeps. There are many posts here and in our help manual related to this topic (search for step controls), so please refer to that for more info.nnStart with that and let us know how it goes - also next time you post show the convergence graph and also explain a bit of what you are trying to model (screen shots of the model would helps us understand).nnThank younnErik Kostsonn

[a.m.aanikce]

Thanks for your reply. I am currently using 2020 R2 as per your suggestion. I will keep you update about the outcome.
Actually we are a structural consultancy firm. We are trying to develop our skill on Ansys for aplying it in simulating specific non-linear problem such as transfer beam, transfer mat, walking column, column changing shape from rectangular to square or circular etc. For that matter we enrolled Cornellx course on ansys. After having some basic idea about the Ansys we are now simulating several tests. Using Solid65 and link180 we were able to converge them and got good results.
After that we shifted to more advance modelling of concrete and problem started from there.

[a.m.aanikce]

I was able to converge as per your suggestion.
But will need future help for other simulations. Thanks for your cooperation.

[Erik Kostson]

Good to hear it helped and that you are OK.

I would recommend to use as you do now the MW/SOlid185/186/187 elements (hex/or tets), and using the automatic reinforcements shown before - it is the best work flow for working with RC structures, and I have been using it myself on real structures with good results (so no command snippets are needed). SOlid65 are old legacy elements that have results that are mesh sensitive so should be used with great care.

I hope it goes well.

Erik