How to obtain Panel reaction output instead on FE nodes

[puneet.gupta12]

Hello everyone, I have applied the supports to Panel (Rigid, Uz). However, results are displaying reactions on FE nodes. Now, I need to obtain the reaction on the base for which I need to make sum of these nodal reactions but it is too huge work considering the numerous nodes and every time I modify model, I need to repeat this step. Is there any exiting tool/ trick to do this? Also, the direct summation will be be inaccurate in case of non linear analysis i.e. Seismic analysis. Thanks in advance for your help. 

[Simau]

Hi @puneet.gupta12 

instead of using elastic support, use panel with foundation elasticity

Don't forget to delete elastic supports before applying new thickness

[Refaat]

As in the capture .

[Romanich]

Hi @puneet.gupta12 ,

If you need to know the total, go to the end of the Reaction table:

[Refaat]

Sorry about my previous post , I expected you need linear reaction .

In your case , click on the right button of your mouse to get the tables  then select ( Plates and shells)  as in the capture below .

[puneet.gupta12]

Thank you. I followed your advice, but i am not obtaining any reaction. 

[puneet.gupta12]

Thank you for your reply. This option is useful to check global reaction, but i have several panels for which i want to find the reactions. 

[puneet.gupta12]

I don't know the stiffness parameters of Foundation. I will try to follow your advice for a test in simple model to know how it will be working. Thank you.

[Refaat]

You can get only the panel reaction as I mentioned if you used elastic panel support .

If you used (Rigid support under the raft ) then you can get the total panel reaction as Roman suggested. Snice you have different panels then you may defined your supports with different names  for each panel . Then you can get the sum for each one of them separate .

[puneet.gupta12]

@Refaat  Thank you very much for your help. So I went ahead and used foundation stiffness on Panels and deleted the supports. Now I can see the reactions on these panels but only in Static cases. Do you know how can I obtain the reactions in seismic cases and combined cases. See below snapshots. Best regards, Puneet

 

 

 

[Refaat · Accepted solution]

Use this type of combination :

[puneet.gupta12]

@Refaat Thank you very much for your help. So, I followed your advice , but I am still unable to obtain the reactions in seismic load cases. sorry but due to confidential information I can not share my main model, but i am sharing a simplified test model on which i usually makes tests. Thanks in advance for knowledge sharing and sharing your expertise. 

[Refaat]

Define modulus of subgrade  for each raft foundation panel.

[puneet.gupta12]

@Refaat thank you once again. I have already applied the foundation stiffness to the panels which will be blocked in vertical direction. In reality, the structure is supported on 9 vertical column, 8 Peripheral supports (including 4 at corners) and 1 at middle of structure. The arrangement is bolted and there is a huge clearance so these supports (9 supports), will only block structure movement in Vertical direction i.e. UZ=0. Accordingly, I have applied the foundation stiffness on these 9 panels. 

Additionally, there are four supports out of which each two supports will block structure in X and Y directions respectively. For that, I have linked the base plate of the supports to a common node using Rigid links and I applied supports on the common node accordingly. This structure and the boundary conditions is more or less identical to the original structure. Could you please now help if I am doing it correctly. Best regards, Puneet Gupta

[puneet.gupta12]

@Rafal.Gaweda @Krzysztof_Wasik  Could you please help on this topic. 

[Rafal.Gaweda]

Hi @puneet.gupta12 

Check   this macro

https://forums.autodesk.com/t5/robot-structural-analysis-forum/api-extracting-ground-reactions-resul...

[puneet.gupta12 · Accepted solution]

Thanks to @Krzysztof_Wasik for the screencast. Elastic supports - reactions  and  Planar support.

 @Refaat  thank you to you as well. I was finally able to follow your solution. @Rafal.Gaweda Thanks for your API. the next would be to implement your code.