yield line analysis for slab

yield line analysis for slab

efyjw7
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Message 1 of 12

yield line analysis for slab

efyjw7
Enthusiast
Enthusiast

Hello professional structural engineer here, I would like to ask about yield line analysis for slabs. Does the yield line I sketch is correct for the square slab with 3 end continuous and 1 end simply supported. Please give me some advice thank you. Sorry for asking some question not related to the software.

efyjw7_5-1684850910218.png

 

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Accepted solutions (2)
1,285 Views
11 Replies
Replies (11)
Message 2 of 12

HoshangMustafa
Advisor
Advisor

Hi

Is there a workaround to get location and shape of yield line using ARSA?

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Message 3 of 12

HoshangMustafa
Advisor
Advisor

Hi,

88 views, no replies.

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Message 4 of 12

CaioSaporito
Advocate
Advocate

Hi @HoshangMustafa!

 

I believe there is no workaround since robot doesn´t perform plastic analysis for shell as we can see here:

 

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Elasto-Plastic-Ana...

 

Best regards, 

 

Caio

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Message 5 of 12

Rafacascudo
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Accepted solution

Not exactly ,but this way you will get some clues

yeld lines 1.jpgyeld lines 2.jpg

 

It becomes clearer using isolines instead of maps

 

yeld lines 3.jpg

Rafael Medeiros
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Message 6 of 12

HoshangMustafa
Advisor
Advisor

Hi @Rafacascudo 

Is there a workaround to draw the white lines in your second picture more accurately? If so, can one model it as lines of linear release of moments in these locations?

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Message 7 of 12

Rafacascudo
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Accepted solution

You can make it clearer  changing the settings on the  "scale" tab. Unmark "with normalization" and  adjust scale range on User limits

yeld lines 4.jpg

or even clearer using "isolines with bigger thickness

yeld lines 5.jpg

setting the scale to be more restrict you can see better where the zero shear line is.

yeld lines 6.jpg and using the mesh nodes you can easily create the pinned  release edges

yeld lines 7.jpg

Rafael Medeiros
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Message 8 of 12

HoshangMustafa
Advisor
Advisor

Hi @Rafacascudo 

Thanks. Where's the "Accept as solution" button?

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Message 9 of 12

Rafacascudo
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Mentor

Probably it doesn't appear to you because you are not the thread starter. But I can do it for you if you allow me

Rafael Medeiros
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Message 10 of 12

HoshangMustafa
Advisor
Advisor

Hi @Rafacascudo 

Yes, of course, I appreciate your help.

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Message 11 of 12

efyjw7
Enthusiast
Enthusiast

Hey experts here, thanks for the solutions. Actually, i already figured it out via manual hand calculation for the plastic analysis for this slab. 

 

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Message 12 of 12

efyjw7
Enthusiast
Enthusiast

Since the slab B1C2 is pinned or simply supported at one edge, and fixed or continuous at three edge. I provide a sketch here the yield line will try to 'shfit' towards the pinned edge, and I try to equate the internal and external workdone equilibrium to find the max Mp in the slab. The correct value of Mp will be 27.12kNm.

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