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Unexpected thermal loads effects on slab

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Message 1 of 5
ouoba.diassiboalain
212 Views, 4 Replies

Unexpected thermal loads effects on slab

ouoba.diassiboalain
Enthusiast
Enthusiast

Hello ; 
I'm designing a RC building . I've applied thermal load on the slab. I'ts a uniform thermal load dT1 = +10 .
The problem is the membrane force that result from this termal is not uniform and have weird distribution.
See the picture  .

ouobadiassiboalain_0-1724859474247.png

 

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Unexpected thermal loads effects on slab

Hello ; 
I'm designing a RC building . I've applied thermal load on the slab. I'ts a uniform thermal load dT1 = +10 .
The problem is the membrane force that result from this termal is not uniform and have weird distribution.
See the picture  .

ouobadiassiboalain_0-1724859474247.png

 

4 REPLIES 4
Message 2 of 5
Simau
in reply to: ouoba.diassiboalain

Simau
Mentor
Mentor

Hi @ouoba.diassiboalain 

Maybe the panel local axis are not pointing at the same direction.
Select "According to X axis" instead of "Automatic direction"

Simau_0-1724860427909.jpeg

 

 

M. Agayr
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Hi @ouoba.diassiboalain 

Maybe the panel local axis are not pointing at the same direction.
Select "According to X axis" instead of "Automatic direction"

Simau_0-1724860427909.jpeg

 

 

M. Agayr
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

Message 3 of 5

ouoba.diassiboalain
Enthusiast
Enthusiast

Hello ! 
Thanks for responding.

The local axis are not pointing at the same direction for all slabs , but the problem still persit . 
See the attached model . 

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Hello ! 
Thanks for responding.

The local axis are not pointing at the same direction for all slabs , but the problem still persit . 
See the attached model . 

Message 4 of 5
Simau
in reply to: ouoba.diassiboalain

Simau
Mentor
Mentor
Accepted solution

Your structure is not "uniform"

Rigidity is different in X and Y direction.

Shear walls will bloc the expansion more than RC portals frame.

So don't expect a uniform distribution as in the example below.

Simau_0-1724868243115.jpeg

 

 

M. Agayr
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Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

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Your structure is not "uniform"

Rigidity is different in X and Y direction.

Shear walls will bloc the expansion more than RC portals frame.

So don't expect a uniform distribution as in the example below.

Simau_0-1724868243115.jpeg

 

 

M. Agayr
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

Message 5 of 5
ouoba.diassiboalain
in reply to: Simau

ouoba.diassiboalain
Enthusiast
Enthusiast

Thanks  you very much ! 
I understand now why the membrane force is not uniform . 

 

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Thanks  you very much ! 
I understand now why the membrane force is not uniform . 

 

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