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[STKO Team]

Thanks for the clarification!

[kolozvari]

When I run the installer from Peru website, it says "This app cant run on your PC". To find a version for your PC, check with the software publisher."

Anyone here knows what is the issue? Can you share OpenSeesMP?

Thanks,

[marafini.f]

Hi kolozvari,

what type of machine are you running the installer on?
32bit?

try to redownload the installer, maybe it got corrupted too.

Keep us posted so we can help you solve the issue.
Francesca

[kolozvari]

I managed to resolve the issue. There was a bug in how my computer unpacked the files. I believe that was an accident, so all good there.

However, when I want to use OpenSeesMP, which I downloaded and installed from "https://www.pucp.edu.pe/profesor/sabino...", I cannot select multiple number of processors.

Is there anything that I need to in setting up the software to allow use of multiple number of processors? Please let me know. Thanks

[STKO Team]

Hi Kristijan!

No, when you use OpenSeesMP you cannot explicitly choose the number of processors from the SpinBox widget. After you do the Mesh, you need to partition your model. The number of partitions will determine automatically the number of processors STKO will use to call OpenSeesMP.

Instead, the SpinBox for the processor count is used only for OpenSeesSP, where the partition is done internally by OpenSees

[kolozvari]

Got it. Thank you!

By the way, I am running your SSI example to get familiar with the analysis. However, when wipeAnalysis commend is used for gravity and/or dynamic (applies to parallel only), the analysis crashes saying that analysis type is no specified. When I do not invoke wipeAnalysis, it works OK. Again, I am using the file that is posted as an SSI example and I am just trying to run it.

Please let me know what you think. Thank you for your help.

[STKO Team]

Yes it happens because we did that model with an old version of STKO.

In the old version, we did not have the wipeAnalysis command automatically set to True at the end of the Analysis command.
Also, we did not have the concept of Fixed time-step and Adaptive time-step built-in into the Analysis command.

Therefore, what we used to do before (with the old version) was to use a "fake" Analysis command with 0 steps, just used to set up the analysis components. After that, we used a custom command (Tcl) to implement our own fixed/adaptive time stepping.

In this new version, we implemented the Fixed and Adaptive time step directly in the Analysis command, and we also introduced the automatic wipeAnalysis at the end of the analysis command. The wipeAnalysis command makes the "fake" analysis settings useless, as it resets them!

So you can convert this file to the new version by simply:

• remove the last analysis step "[21] RUN - misc_commands.customCommand" where we just did 2000 steps for a duration of 1 second.
• in the analysis step "[20] analysis - transient" set: a) numIncr = 2000, and duration = 1.0. Optionally you can the Time Step Type to adaptive if you plan to insert non-linearities that can make the convergence harder to achieve.
• keep the wipeAnalysis ON

This file is useful to understand all the components you need to implement the FreeField + Absorbing Boundaries in OpenSees manually with the building-blocks OpenSees had before:

• apply fixities in stage 0
• remove fixities in stage 1
• replace reactions with equivalent forces
• create free-field and dashpots

However, this method was good but not completely correct:
It was missing a very important component that we could not find in OpenSees at that time. Transfer the Free field stresses at the soil domain as equivalent external boundary tractions. This was necessary to impose the free-field response to the sides of the main soil model.

Now, in OpenSees version 3.3.0 we added the new ASDAbsorbingBoundary2D/3D element which does all those steps automatically, and it includes also the above-mentioned component.

In the latest webinar we gave a preview of that:
Implicit-Explicit Contact Element Applied Examples: soil-foundation interaction and RC structures. If you download the files you will see a folder with some 2D/3D examples.

Finally, in the next webinar (November 4th) we will talk about that element in more detail, and we will show how to create a Soil-Foundation-Structure interaction model from zero, using also this boundary condition to run a dynamic analysis.
Don't miss it!

[kolozvari]

That worked. Thank you!

Regarding to Webinar, I have a time conflict, but I will definitely watch the YouTube video.

Best,

Kristijan

[STKO Team]

You are welcome!