PINCHING4 Material

[andrea79]

Hello,
I just started using OpenSees for my Ph.D thesis.
For considered the degradation under cyclic loading, I use PINCHING4 Material.
The cyclic degradation is defined by four parameters (for example: $gK1 $gK2 $gK3 $gK4 $gKLim).

My question is:
what is the difference between K1, K2, K3, K4, Klim?
who refers K1, ..., Klim?

thank you!

[vesna]

Answer to your question may be in the PEER report referenced at the bottom of the page.

[andrea79]

Ok, Thanks