Analysis error while creating input files

[youngkyu]

Dear STKO support team,

While modeling concrete slab faced rockfill dam (CFRD) subjected to an earthquake load in STKO,
I got the error message in the attached image.
Would you please help me resolve this issue?

Best regards,
Youngkyu

[STKO Team]

Try this:

Question_Error.zip

(199.22 KiB) Downloaded 23 times

That error says that two Elements that share the same nodes have different DOFs (i.e. the Contact element that expects 2 DOFs and the UP soil element that expects 3 DOFs).

To solve the issue:

• Create a dummy line (same quadratic mesh as per soil element)
• The contact interaction slave should be the dummy line (so that the slave nodes have 2 DOFs).
• Connect the dummy line to the border of the soil only in the shared DOFs (Ux and Uy)

But pay attantion to the contact params. Your beam is not in conctact with the soil and remains floating

[youngkyu]

Thanks for your answer. It helped a lot.

The scd file you edited worked with warning message.

While attempting to reproduce the interactions you modified, but an error occurred as you can see it from 'Interface_MySelf.scd' file in the Set_Interaction_Myself.zip file.

Additionally, I want to change the location of water pressure from soil surface to slab surface. (Currently, the water pressure is located on soil surface)
When trying to put water pressure on slab surface in 'Question_Error.scd' file that you edited, I also got an error.
('Question_Error.scd' file that you edited = working version with water on soil surface)

Could you figure out what was wrong with my modeling ('Interface_MySelf.scd' file)?
Also, could you look at why an error happens when changing the water pressure location from soil surface to slab surface?

Best,
Youngkyu

[STKO Team]

One question at a time:

While attempting to reproduce the interactions you modified, but an error occurred as you can see it from 'Interface_MySelf.scd' file in the Set_Interaction_Myself.zip file.

Regarding this file, I found at least 2 mistakes:

Code: Select all

[*]The mesh is not compatible between the dummy line and the soil. Delete all edge seeds, and re-define a global seed to make them have the same
[*]Add a Self Weight load also to the dam, otherwise in the first stage the soil will move downward and the dam will not follow it

[youngkyu]

Dear STKO support team,

When I click the 'Run analysis' button, the process seems to complete up to 'Gravity-LE' and 'Gravity-LE-Water' as shown in the attached image. However, the analysis seems to stop at 'Gravity-NL' without displaying any error messages.
Could you please help me resolve this issue?

Best wishes,
Youngkyu

[STKO Team]

If you look at the output of the first 2 stages you will see that the dam is floating.
can you try to add both mass and self weight to the dam?