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Valued Contributor
Opel5
Posts: 81
Registered: ‎08-02-2012

panel reaction output rather than FE nodal reactions?

493 Views, 18 Replies
10-26-2012 08:43 AM

Afternoon All,

 

I've been trying to export the base reactions for an RC building made up of FE meshed panels. Unfortunately Robot seems to only export reactions for every individual FE node, leading to a HUGE file of thousands of nodes.

 

I just want basic uniform distributed load KN/m, and KNm/m reactions along the base of the walls in order to design up a chunky raft outside of Robot. Is there any add-in / plug-in that I could use to acheive this with minimal pain?

 

I'd rather not have to work out approximate reactions by hand, or absorb a large volume of time decyphering the FE nodal reaction output. Expert help appreciated! :smileyhappy:

 

Thanks,

Scott

 

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Product Support
Artur.Kosakowski
Posts: 4,606
Registered: ‎12-17-2010

Re: panel reaction output rather than FE nodal reactions?

10-29-2012 12:47 AM in reply to: Opel5

 

http://docs.autodesk.com/RSA/2013/ENU/filesROBOT/GUID-67D72F99-C7D5-4C15-BE1A-45E8AE0A4330.htm?highl...

 

http://docs.autodesk.com/RSA/2013/ENU/filesROBOT/GUID-3936FDA3-5DFD-4F31-B16A-F0208A451282.htm

 

Display results at the bottom edge of walls. You may add cut (wall) length in the display of the Reduced Results table so that you know the value of bending per unit length if needed.

 

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
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Valued Contributor
Opel5
Posts: 81
Registered: ‎08-02-2012

Re: panel reaction output rather than FE nodal reactions?

10-29-2012 02:12 AM in reply to: Artur.Kosakowski

Thanks Artur :smileyhappy: Ok I'll see if I can get some useful results from that. The building has many wall panels at foundation level though.... Is the option of displaying foundation reactions per m length in the development list for Robot? It seems pretty fundamental. It wasn't a pleasant suprise to find out this was missing last week.

 

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Product Support
Artur.Kosakowski
Posts: 4,606
Registered: ‎12-17-2010

Re: panel reaction output rather than FE nodal reactions?

10-29-2012 06:08 AM in reply to: Opel5

linear reactions.PNG



Artur Kosakowski
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christian_jessen
Posts: 5
Registered: ‎06-04-2014

Re: panel reaction output rather than FE nodal reactions?

06-04-2014 06:47 AM in reply to: Artur.Kosakowski

In order to design the foundation i also need the overturning moment in order to calculate the excentricity. I have tried to i uncheck the Fz value but Robot doesn't print any value for My any ideas?

 

Robot.jpg

 

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Mentor
Rafacascudo
Posts: 184
Registered: ‎05-16-2011

Re: panel reaction output rather than FE nodal reactions?

06-05-2014 06:58 AM in reply to: christian_jessen

You don´t have a fixed support!!!!

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Product Support
Artur.Kosakowski
Posts: 4,606
Registered: ‎12-17-2010

Re: panel reaction output rather than FE nodal reactions?

06-06-2014 02:11 AM in reply to: christian_jessen

christian_jessen wrote:

In order to design the foundation i also need the overturning moment in order to calculate the excentricity. I have tried to i uncheck the Fz value but Robot doesn't print any value for My any ideas?

 

As the sum of reactions is done with the reference to point of (0,0,0) coordinates the easiest would be to define the line of supports according to which you want to calculate the overturning moment at the 0 coordinate line and check the value of the sum of moments.

 

overturning moment.png

 

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
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Member
christian_jessen
Posts: 5
Registered: ‎06-04-2014

Re: panel reaction output rather than FE nodal reactions?

06-06-2014 04:18 AM in reply to: Artur.Kosakowski

That works fine for a plane situation but as far as I know this will not be a practicable way for 3D building where a load along for instance the Y-axis also can introduce forces along the z-direktion due to torsion i the building. I need the moment My for each wall, in order to calculate the excentricity for the loading on each undation. Please se sketch.

 

 

 

 

Robot with moments.jpgfo

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Mentor
Rafacascudo
Posts: 184
Registered: ‎05-16-2011

Re: panel reaction output rather than FE nodal reactions?

06-06-2014 05:43 AM in reply to: christian_jessen

as I said before , you´ll never get My reactions through "diagrams for bars" when you have linear pinned supports!!.

Maybe what you need is a fixed node support in the center of your wall base and then connect this node to the other base nodes through rigid links.

 

See attached picture

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Valued Contributor
dimogrec
Posts: 96
Registered: ‎07-16-2011

Re: panel reaction output rather than FE nodal reactions?

06-06-2014 08:05 AM in reply to: christian_jessen

 

christian have you tried to define the vertical walls as core wall? Perhaps by doing this and then viewing the results -> diagramms for building ->core wall diagamms you'll get the My for your walls

I don't know if this helps...

 

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