Interactions for simulating a real prestress operation of strands in concrete

[Zain_117]

I am simulating a prestress beam. I used normal behaviour, tangential behaviour, cohesive behaviour, and damage behaviour. Are these are right interaction combinations for surface to surface? Also in cohesive behaviour, there is traction separation stiffness like Knn, Kss, Ktt. How to calculate the values of this stiffness?

 

[FEA way]

Yes, such a definition is correct. Check the documentation chapter "Contact Cohesive Behavior" (especially paragraph "Interaction between Cohesive Properties and Regular Contact Properties) to understand how it all works in combination.

You can leave the default values if you don’t have a good source of such data or look for more accurate inputs in literature.

 

[Zain_117]

Thank you, I will check. I want to plot bond stress at interaction vs strand slip. How I can plot it?