Hello
I would like to make a formwork for spiral stair treads with a circular plan in reinforced concrete, once the step has been modeled I would like to make a simulation via Sw, only I encounter a problem because the material " concrete " in Sw is not specified... and when I fill them in a window appears when I launch the simulation, ???
Can someone give me information?
Thanks
Hello
Have you filled in all the characteristics?
Hello
I think you have to create a new material with all the properties indicated. Be careful, there are many different concretes, reinforcement is also important, which is probably the reason why the modulus of elasticity in particular is not indicated.
I guess you're on a load of 250kg/m². Try to get closer to a calculation office to retrieve the missing information
Technical documents concrete + aggregates (holcim.ch)
Hello
As @Le_Bidule points out, reinforcement is very important when it comes to concrete.
Logically you should draw it in 3D, have it in your room as a separate body (also removing the volume of the shoes in the step...).
Scrap metal is normally used to take up tensile forces (to prevent the concrete from cracking).
If in addition your scrap metal is prestressed, we move to a level higher in simulation (you have to sum the case of prestressing load + your load): it's not necessarily impossible to do with the basic simulation but you have to be clever.
There are students who ask themselves the same kind of questions as you (bad luck, the answers to the practical work are not with them): http://oasis.ac-aix-marseille.fr/upload/docs/application/pdf/2017-05/acti_modelisation_poutre_beton_arme.pdf
great thank you!!
And since I'm really nice, you also have the right to a complete thesis on the subject:
http://www.univ-usto.dz/theses_en_ligne/doc_num.php?explnum_id=2292
(spoiler: the guy has modeled the reinforcement in the concrete well)
Analyzing your design I think that you should remove the edges and replace them with fillet or have the face in green (or the opposite face) tangent to the shaft as is commonly practiced. Besides, there must be a reason. For my part, I always assume that other people have worked on the subject before me, even for more design projects
Mechanically it is recommended to dismiss all this 
If you want to keep this principle, the red rating is really low. In metal we could afford it, but in concrete...
There are posts for the handrail connecting all the steps externally, plus reinforcement of the steps, that said this dimension can be enlarged as well
Thank you
DIXIT FROUSSEL,
Interesting!!! i.e. if I model the reinforcement and include it in the step - in assembly??? - SW can make a more realistic simul??? by cunning??? Concrete + steel???
It must be done in x time:
Okay, when you say insert, what is it, an assembly or a very specific function, copy of one file into another, also the Boulean function(s) where are they in SW?
Thank you very much
You insert your reinforcement in your walking part and then you subtract the volumes with the combine function:
You reassemble your hollow step + the reinforcement and you calculate this assembly (with a global contact = integral so that the 2 parts are glued together).
The modelling should perfectly correspond to an unprestressed step (scrap metal simply cast in concrete).
Put the right materials in your assembly: the right steel grade for the scrap and find the right values to enter for the concrete material (it does not exist by default in SW)
I suspected it was with the Combine function!! that the Boulean operations are managed with SW, so I will model the reinforcement under SW, follow your procedure in x tps/steps
to make this simulation
thank you so much
See you soon, I'll keep you posted
