Beam plastic analysis - Structure collapse

[rigid_joint]

I run an example with elastic-plastic and plastic-plastic analysis of a steel beam fixed at both ends.

The 1st plastic hinge is calculated correctly (checked by hand). These are my settings and I think that they are ok.

And the outcome is this which is right (plastic hinges in both ends)

But when I run "structrure collapse" the results are far away from the hand calculations.

These are my settings wiht "structure collapse" option checked :

And the outcome is like this. Both ends have greater moments then the plastic moments and no right collapse mechanism occurs.

What is getting wrong with my settings?

[Artur.Kosakowski]

Could you attach the 2nd model?

[rigid_joint]

mr Artur.Kosakowski,

the attached file is the 2nd that you've asked for.

[Artur.Kosakowski · Accepted solution]

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