Robot Structural Analysis Forum
Welcome to Autodesk’s Robot Structural Analysis Forums. Share your knowledge, ask questions, and explore popular Robot Structural Analysis topics.
cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Concrete Slab Problem - beginner

41 REPLIES 41
Reply
Message 1 of 42
Wioletta_F
889 Views, 41 Replies

Concrete Slab Problem - beginner

Hello,

I'm trying to model concrete flat slab and compare the results to results from different software. I fallowed all guidance I could find but it looks like I'm doing something wrong and my deflections are WAY to big. Can you please help? Where do I start?

 

 

41 REPLIES 41
Message 2 of 42
Rafal.Gaweda
in reply to: Wioletta_F

Have you seen any errrors or warnings during calculation and design?

PLease upload the model.



Rafal Gaweda
Message 3 of 42

Wild guess: you imported some dxf/dwg having Robot units set as meters whereas the dxf/dwg was defined in mm. If I'm right rescale the structure in Robot with m/mm ratio.



Artur Kosakowski
Message 4 of 42
Wioletta_F
in reply to: Rafal.Gaweda

Apart from couple of isolated nodes which I ignored for now - nothing, no errors.

Message 5 of 42
Rafal.Gaweda
in reply to: Wioletta_F

Have you checked the dimensions and units of model?



Rafal Gaweda
Message 6 of 42

It's a very good guess! I did use dxf and it's in mm. I've checked units in Robot and It's set m. Can you please tell me how do I rescale the whole slab in Robot to mm? Thank you very much for your quick response, really appreciated.

 

Message 7 of 42
Rafal.Gaweda
in reply to: Wioletta_F

Edit menu \ Edit \ Scale



Rafal Gaweda
Message 8 of 42

scale1.PNG



Artur Kosakowski
Message 9 of 42

Thanks, now that it's rescaled, the panel and mesh are gone from the model. When I try to regenerate the mesh nothing is happening...

Message 10 of 42

Set 3D view. RMB -> Zoom all. Set size of mesh that corresponds to the size of the slab.



Artur Kosakowski
Message 11 of 42

I've got the mesh, but just noticed that my columns/supports are 'in wrong direction' ? Not along Z axis but X? Can you please have a look? Thank you.

Message 12 of 42

What is the structure type (plate or shell)? What is the definition of the support (UX blocked)?



Artur Kosakowski
Message 13 of 42

My settings are as on the attached pdf.

Message 14 of 42

1. Select all supported nodes

2. Define a new support label

3. Assign it to the selected nodes

 

If this does not help attach the rtd file please.



Artur Kosakowski
Message 15 of 42

I tried defining new label - Column 2, but it looks the same.How do I send the RTD please?

Message 16 of 42

1. Save under a new name selecting without result file type

2. Compress file

3. Attach to the post

 



Artur Kosakowski
Message 17 of 42

Thanks for instruction. Please find attached.

Message 18 of 42

My assumption is that somebody converted what was originally a shell model into a plate one. Try the following:

 

1. Change the structure type to the shell (Geometry > Structure type)

2. Open the Column_2 support label and press the Direction button

3. Change beta rotation angle from 270 to 0. Rewrite the original definition of the support label.

4. Change model back to the plate one.

 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.



Artur Kosakowski
Message 19 of 42
Wioletta_F
in reply to: Wioletta_F

Brilliant, it's working. Thank for your patience (dzieki 🙂 ).

Message 20 of 42

Nie ma za co Smiley Happy



Artur Kosakowski

Can't find what you're looking for? Ask the community or share your knowledge.

Post to forums  

Autodesk Design & Make Report