How can i calibrate the concentrate plastic hinge from experimental data?

[yihong]

Dear STKO Team：
i am trying to build a plane model ,it's about a three story and two bay steel frame;

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but the beam section is not same along the entire beam,a damage link is insert into the beam end,and its section is somewhat like RBS,its section is reduced a lot,and there is a gap between web and upper and lower flange(this damage link is design for sepecial purpose,to fracture firstly in flange then extend to web);

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if i want to incorporate Modified IMK or some other suitabale model into my zerolength element

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,how can i get the parameters like elastic rotational stiffness,My from experimental data(test of monotonic and cyclic test on connection with this damage link.)

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could i get some recommendation or reference?
thanks a lot:-)

[STKO Team]

If you use any uniaxial material like the Mod IMK, in a hinge it is interpreted as a Moment-Rotation relationship.
You need experimental data on this relationship to calibrate the X-Y points of your material. Not a moment-drift like in the picture