Slab - twisting moments

[aprule]

Dear,
I need to model 3 type of 2-axis slab models in Robot Structural Analysis 2014: drillfrei, drillweich and drillsteif (German terms). My German is not so good so I presume it has something to do with twisting moments of the slabs so it will be, i think: without twisting moments (drillfrei), with twisting moments but with the support uplift (drillweich), with twisting moments without support uplift (drillsteif). I have found some examples modeled in other software:

http://www.isa.fh-trier.de/home/Projekte/FEM_nicht_lineare_Lagerung_SB/

In folder Beispiel1--Berechnung mit RFEM (drillweich) and (drillsteif).
1. Has anyone met before with terms drillfrei, drillweich and drillsteif and am I correct connecting these with twisting moments?
2. If yes, is my assumption correct:
- drillfrei - I should model orthotropic slab leaned on 4 sides on pinned line supports, but with torsional stiffness = 0,00
- drillweich - model simple slab leaned on 4 sides on pinned line supports, but with allowed uplift of the support UZ+
- drillsteif - model simple slab leaned on 4 sides on pinned line supports
3. Am I making something wrong here about these slabs?
Thanks for Your time!

 

[aprule]

Can anyone answer or at least delete the post (because it is useless then)?

 

[JoshPlumSE]

Can't you contact their tech support group? Then you could update the rest of us on the subject.

Note:
My first thought is that these terms might refer to the "drilling degree of freedom" for the plate. But, that is based on Google translate interpreting the terms as Drill - Soft (weich), drill - free (frie) and drill - stiff (steif).

 

[aprule]

I asked RSA support but still no answer, but it is not important which software I use. I used Google translate too but I am not sure are models correct, like I described in first post. Thank you for trying to help JoshPlum!

 

[Archie264]

The topic is way over my head so for once I've chosen to keep my mouth shut and not respond to something I don't understand. Doh! Whoops, too late, there I went and did it again!

It sounds like a rather complex problem but, that said, if you can post a sketch of what you're trying to investigate then probably some people on this site might be able to offer insight borne of years of experience.

 

[aprule]

I am trying to model these 3 slabs and compare the results as I wrote in first post.
Examples and sketches are in the link as you can see in the first post.
People experience is the reason I asked on this forum.

 

[Archie264]

Ah, I missed the link. Sorry about that.