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
M. Agayr
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What about checking the forces in steel bars in the nodes that are 'connected' with the concrete frame?
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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
M. Agayr
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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 ?
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
(or Excel).
I try the macro in the link, very useful but not for my need.
Can i try proposal number 3.
Thanks Rafal
M. Agayr
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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.
M. Agayr
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Therefore is it possible to easily split the structure, by adding a small barre (1cm) or a rigid link between stell and concrete.
M. Agayr
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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.
@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))
If you like it I can change it to work on opened file and bar selection made in robot.
Thanks Artur,
it works fine
M. Agayr
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Thanks Rafal,
M. Agayr
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Yes, if its possible, i would like to have it works in opened file.
Thanks for help
M. Agayr
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Simau wrote:
Yes, if its possible, i would like to have it works in opened file.
Two files - one is listing them as Forces , second as reactions (diference = force sign)
Forces sum as a result implemented 🙂
(forces listed from lower node of bar, if both nodes have the same Z coord then forces listed from bar endnode)
Thanks Rafal,
this apps are just great
M. Agayr
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Panie MIchale,
Of course it can be updated.
Basing on examples attached to thread listed below you can update this macro to get results for combinations and automatic combinations also :
This small update is required to get also results for manual combinations:
.......
Dim case_sel As IRobotSelection Set case_sel = R.Project.Structure.Selections.CreatePredefined(I_PS_CASE_SIMPLE_CASES) Dim mancomb_sel As IRobotSelection Set mancomb_sel = R.Project.Structure.Selections.CreatePredefined(I_PS_CASE_COMBINATIONS) case_sel.Add mancomb_sel Log "Getting forces ..."
........
Updated macro attached.
Shall I give you some time to update it with automatic combinations?
thansk for your interest. Unfortunately attached macro crashes while I click "Run" button (Excel has stopped working).
Screen shot with the crash please (code line where it stopped)
Maybe :
http://forums.autodesk.com/t5/Autodesk-Robot-Structural/API-error/m-p/3518984/highlight/true#M5791
