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respectful everone：

I use Joint2D to build a beam-column joint, then subjected to cyclic loads to draw hysteretic curves.

when I change the parameters of pinching4 material, the hysteretic curves cannot change at all. and I don't know if it was because the problem of multiple constraints.

I use "rigidlink bar" to connect the nodes of zero-length section element between upper column and joint(2 3 ), beam and joint(6 7 ), bottom column and joint(9 11)
rigidLink bar 2 3;
rigidLink bar 6 7;
rigidLink bar 9 11;

the center node of joint2D is 12, and the external nodes are 2 6 9 11 respectively，I use rigidlink beam to multi-constraint them
rigidLink beam 12 2;
rigidLink beam 12 6;
rigidLink beam 12 9;
rigidLink beam 12 5;

thank you so much and may you have a delightful day！