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Simau
Posts: 32
Registered: ‎10-12-2011
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Local reactions (API)

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02-27-2013 08:02 AM

Hello All,

 

I have a three-dimensional structure over a concrete structure. I wonder if there is a possibility to recover reactions of the frame on concrete.

Attached a partial view

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Artur.Kosakowski
Posts: 4,541
Registered: ‎12-17-2010

Re: Local reactions

02-27-2013 08:04 AM in reply to: Simau

What about checking the forces in steel bars in the nodes that are 'connected' with the concrete frame?

 

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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Active Contributor
Simau
Posts: 32
Registered: ‎10-12-2011

Re: Local reactions

02-27-2013 12:53 PM in reply to: Artur.Kosakowski

For one node and one steel bar, there is no problem. But with 3 or more bars per concrete support and many load cases its not paratical.

Is there any possibility to have the results directly like  (Fx, Fy, Fz, Mx, ...) on each  bearing points in order to size the anchorge, or the only solution is what you suggest.

 

Thanks

 

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Rafal.Gaweda
Posts: 4,925
Registered: ‎04-26-2010

Re: Local reactions

02-28-2013 12:48 AM in reply to: Simau

I have different macros for different purposes

1.   http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Envelope-of-forces-at-a-connection-API/m-p/3... - forces in LCS of bars

 

2. I have also similar macro but presenting forces in GCS

 

3. and  macro listing internal forces from bottom node of selected bars as reactions

 

4. or .. what do you want ?



Rafal Gaweda
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Artur.Kosakowski
Posts: 4,541
Registered: ‎12-17-2010

Re: Local reactions

02-28-2013 01:14 AM in reply to: Simau


For one node and one steel bar, there is no problem. But with 3 or more bars per concrete support and many load cases its not paratical.

 

You can define connect the inclined bars e.g. 1cm above the bottom node of the vertical one. This allow you to have only one set of forces to check (from the vertical bar).

 

Is there any possibility to have the results directly like  (Fx, Fy, Fz, Mx, ...) on each  bearing points in order to size the anchorge, or the only solution is what you suggest.

 

Rafal's macros :smileyhappy: (or Excel).

 

 



Artur Kosakowski
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Active Contributor
Simau
Posts: 32
Registered: ‎10-12-2011

Re: Local reactions

02-28-2013 04:52 AM in reply to: Rafal.Gaweda

I try the macro in the link, very useful but not for my need.

Can i try proposal number 3.

 

Thanks Rafal

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Active Contributor
Simau
Posts: 32
Registered: ‎10-12-2011

Re: Local reactions

02-28-2013 04:59 AM in reply to: Artur.Kosakowski

Ok Artur, if I was the author of the model I have done so.

But i am just trying to extract these réaction in an easy way.

Therefore is it possible to easily split the structure, by adding a small barre (1cm) between stell and concrete.

 

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Active Contributor
Simau
Posts: 32
Registered: ‎10-12-2011

Re: Local reactions

02-28-2013 05:02 AM in reply to: Simau

Therefore is it possible to easily split the structure, by adding a small barre (1cm) or a rigid link between stell and concrete.

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Artur.Kosakowski
Posts: 4,541
Registered: ‎12-17-2010

Re: Local reactions

02-28-2013 05:22 AM in reply to: Simau

1. Select the top part and copy it vertically e.g. 20 m upwards

2. Delete the 'original' top part

3. Move the copied part 20m - 1cm downwards

4. Define rigid links or small bars.

 

 

 



Artur Kosakowski
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Rafal.Gaweda
Posts: 4,925
Registered: ‎04-26-2010

Re: Local reactions (API)

02-28-2013 06:34 AM in reply to: Simau

Simau wrote:

I try the macro in the link, very useful but not for my need.

Can i try proposal number 3.

 

 

Example macro attached.

Select calculated file, enter bars selection in Excel cell then Run

(if you want forces as internal forces in GCS just got to VB editor and remove -1 multiplier from similar   lines like that ....... = -1 * vals(0))



Rafal Gaweda
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