I have questions about results of IMK spring for nonliear part of columns.
All of the spring result in story 1 have zero flexural moment and other springs of other column in upper story have some little rotation & moment that diagram of moment rotation of these springs are completely elastic although results of forces in columns show that we have moment in them & results of moment-rotation of beam show a cyclic behaviour.
I hope having good descirbtion of my problem, Can you help me please?
spring IMK for concentrated plasticity
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