Salam,
I have a query regarding finding out the story stifness of building structure.
I have modeled a building on Etabs and applied applied UBC Zone-3 lateral loading on it. Ran analysis and then from "show tables" i selected show "story stiffness" and i got a table showing story story stiffness of each story in both (x and y) directions.
But when i modeled the same building and applied time history function and selected to show story stiffness from show tables, ETABS is not showing any story stiffness at all. Can anyone explain what is the reason of it?