In the definition of P-M2-M3 hinge (456.jpg), i noticed that Moment/Yield Moment coefficient for point B is equal to 1 but for point C is smaller and equal to 0.684. In order to maintain the load carrying capacity between B and C points you must also assign a Moment/Yield Moment coefficient equal to 1 for point C. In this way the behavior is elastic-perfectly plastic. Sudden strength drop usually happens after point C. If you wish to model this behavior, you can assign a small Moment/Yield Moment coefficient (e.g. equal to 0.25) for point D.

Can you please tell me how to define user hinges? It would be very helpful if you could show me file of your model.

It is easier to initially import Auto Hinges (Assign-->Frame-->Hinges-->Auto (from Tables in ASCE 41-13 (Steel or Concrete Beam or Column) or Idealized flexural hinge for Section_Designer defined sections) to members' end-sections. Then convert them to manual Hinges (Define--> Section properties-->Hinge properties--> select Auto Hinge and click Convert Auto to User Prop). After this, you can modify the Hinge properties by editing them. Try it initially to an end-section of a structural member. Then you can insert the edited hinge to other members with the same geometric and strength properties.

when i assign hinges for beam and column before pushover analysis in SAP 2000,. a error is shown related to assigning hinges . How can i overcome from this issue?

kindly help me if someone find solution of it