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What STKO team meant is different.
The bond behavior of smooth rebars is completely different from that of ribbed rebars. If you like to model the micromechanical behavior of the ribbed rebars you need to model all the details.
Look at the picture attached. The bond of the ribbed bars is ensured ...

As we said meanwhile you can use prof. Tarque's version which is 3.3.0.

Version 2.0.6 of STKO supports the pore pressure response

Unfortunately, the MPCO recorder does not work on 3.3.0. You can either use:
1) an older version, HDF5 database was implemented in the 3.0.0
2) prof. Tarque's version: https://drive.google.com/file/d/1ETGQ3Y9HOmxdfyA6k2edwwYo0zW5Mk7C/view

Bear in mind that the next official version of OpenSees will ...

The tau slip is integrated automatically along the bar surface and provides automatically the force-displacement relationship

Webinar 17 of getting started:
https://asdeasoft.net/?stkowebinars-for-opensees

Dear Spater,
we will reply in the next few days, as we already explained to you, we have answering priorities and the free version comes after the paid licenses.

Dear Wngyun,
Kn: Normal stiffness. It is the Elasticity modulus in the normal direction to the contact element. You can assume 10~100 times the smallest value of E of the elements in contact.
Kt: Shear stiffness modulus. It is the Elasticity modulus in the tangential direction to the contact ...

More or less. The merge option will force you to have the same mesh size, while with the embed option you can also use different meshes (very useful in SSI). The only thing you can't capture is rocking, if you like to capture rocking you need to use the 3D contact interaction we developed.

Attached ...

Dear S.T.,

we highly appreciate the comments of our users and take them into serious consideration.

We are a team of highly specialized and recognized researchers with long experience in research and design. Our team has more than 200 publications on journal papers, and so we are not stranger to ...