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Hi, I am interested in micro-modeling of masonry structure (i.e., modeling the interactions between bricks and mortar between them for an arbitrary configuration, without using equivalent frame model). I have created masonry structure similar to the attached files (brick elements representing bricks as well as mortar between them, similar to STKO Youtube tutorial for masonry structure micro modeling). I have the following questions:

1. I would like to compare the masonry modeling results between STKO and Pure OpenSees. What is the OpenSees nDMaterial similar or comparable to DamageTC3D?

2. If I want to make a brick element with irregular shape (e.g., H or L-shaped one rather than cuboid), how do I make that element? Do I combine several cuboidal bricks as one element (if so, how to combine multiple bricks?) or declare custom element?

Thanks!

I would like to compare the masonry modeling results between STKO and Pure OpenSees. What is the OpenSees nDMaterial similar or comparable to DamageTC3D?

Keep in mind that DamageTC3D is still an OpenSees material, but provided via a DLL. If you want to use a material which is similar, and that is in the official OpenSees repository, you can use the PlasticDamageConcrete3d:

This is an example:

If I want to make a brick element with irregular shape (e.g., H or L-shaped one rather than cuboid), how do I make that element? Do I combine several cuboidal bricks as one element (if so, how to combine multiple bricks?)

Yes you need to combine multiple cuboid solids, using the merge command