Hi, if you have been following the work I have been doing on concrete and would like to try it for yourself, then you can now pull the relevant FreeCAD version from here: https://github.com/HarryvL/FreeCAD/tree/concrete.

Some words of caution:

1) Anything I do and provide is just to gain insight in mechanical behavior of conceptual designs and not for making design decisions that may impact safety or performance. For that you would need to consult a qualified, professional design engineer, which I most definitely am not.

2) There is plenty of debate in the structural design community on the usefulness and limitations of linear elastic analyses for concrete design. I can recommend the following references as a starting point:

- Finite Element Design of Concrete Structures by G.A. Rombach

- Finite Element Design of Concrete Structures (practical problems and their solutions) by G.A. Rombach

- Practitioners' Guide to Finite Element Modelling of Reinforced Concrete Structures by CEB-FIB

3) The following material parameters are hard coded (because I still can't figure out how to update the material dialog in FreeCAD):

fy: factored yield strength of reinforcement bars - default: 315 MPa

fck: factored concrete cube compressive stength - default 0.75*0.6*35.0 = 15.75 MPa

phi: angle of internal friction for concrete - default 30 degrees

see here

https://github.com/HarryvL/FreeCAD/blob ... #L589-L599

and here

https://github.com/HarryvL/FreeCAD/blob ... #L748-L757

Please give it a try and share some results.