MESH ERROR SOIL DOMAIN

[allano89]

Thanks a lot vey clear.
One more question please. What do you think about the ANALYISIS STEPS I am considering? Because I saw in webinars about SSI you used the material nd.Initial.Analysis.Wrapper and you change all the Analysis Steps.
I´ve attached the Analysis Steps that I´m considering.

[STKO Team]

This seems fine.
However, when you have soil + structure, it's more reasonable to first build the soil and analyze it with its own self weight.
The you reset the displacement to zero, keeping the stress from the self weight (InitialStateAnalysis).
At this point you can add a structure.

The reason for this is that the structure is build when the soil is already in the deformed configuration with the state of stress derived from its own self weight

[allano89]

Thanks a lot.
Now, I put initial state condition, but I had a problems with the convergence, please your help
I´ve attached the model and the mistake.

[STKO Team]

I tried to have a look at your model but I cannot fix it because some parts of the model are not clear to me.

However, the error is in how you use the addModelSubset command.
In your file you added only 1 modelSubset, with the soil, the interactions in the soil only (edofs) and some interactions between soil and structure.

The procedure should be this instead:

• addModelSubset: soil and interactions between soil parts ONLY!
• add constraints and load patterns acting ONLY on the selection sets previously added with the modelSubset of the soil
• do the initial state on / gravity / initial state off
• addModelSubset: structure and interactions structure-structure (like rigid diaphragms) and soil-structure (contacts, etc..)
• add constraints and load patterns acting ONLY on the selection sets previously added with the modelSubset of the structure

[allano89]

Thanks a lot
I understand your recommendation but when I've model the addModelSubset just soil and interactions between soil parts I had a different mistake.
I´ve attached the error with the model
Please your help
PD: In this point I´ve just to want run the first part I mean just the soil because If I get to run the firs initial condition the second (structure) will be easier.

[STKO Team]

There were still errors with the model stages.
For example here you added the embedded constraints that links the soil to the structure, but at this point the structure is not yet in opensees (that's why you have the error):

subset_error_1.png (134.03 KiB) Viewed 4853 times

Here's a working file:

01-TESIS DOS PISOS COMPLETO CON SOTANOS CAPAS LAPTOP.zip

(686.74 KiB) Downloaded 278 times

You just need to put some nodes in the "TOP NODES" selection set, because it's empty, and the monitor is not recording anything

[allano89]

Dear STKO team
Thanks a lot for your time I really appreciate that.
The model that you sent me doesn't work. Maybe you took some consideration before the run the model?
I´ve attached the error

[STKO Team]

The model is working fine for me.
Make sure to install the latest versions of both STKO and OpenSees-Solvers. And make sure you are using OpenSeesMP (according to your analysis settings)

[allano89]

Dear STKO team
I want to say thank you. I really apreciate this forum, It´s really helpful and so kindness. I hope with this last advice I finsish my investigation, thanks a lot
Best regardings
allano89

[STKO Team]

You're welcome