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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 alt...

hi
I want to add a gap element at the base of a column of the first story, I modeled beam and column with elasticbeamcolumn and rotational springs at the ends. I need help about connection of rotational spring of nonlinear behaviour of column and linear spring for gap.
plz help me

hi
I have 2D moment resisting frame model with p delta effects .
how should assign mass and loading of frame and leaning column from 3D structure????