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Hello STKO team,

I am working on a pushover model for an MVLEM shear wall, and I am trying to add springs at the base because a fully-fixed base is not the best reflection of reality. So I have been following the example presented on this forum post: viewtopic.php?p=5700&hilit=foundation+impedances#p5700 where I have tried to follow the same setup. However, I think I may have made a mistake somewhere with the interactions or the zero-length elements because it is difficult to tell what has been selected with the nodes overlapping at the zero length elements, so I would greatly appreciate any help and guidance you can provide.

Thank you!

The interactions did not have any element property (instead you assigned it to the nodes of the geometry): This is how it should be: Here's the modified file: Note: I slightly moved the fixed node apart so that it's easier to handle the interaction. Once you are done, you can move them back. However, a zero-length does not couple displacement and rotations, so it makes no difference if you have a small gap or not

Ahhh, ok, that will definitely do it! And that makes a ton of sense. Thank you for the tip on offsetting the nodes as well so that it is easier to make the appropriate selections. Thank you, and I really appreciate your help!

You're welcome