Storey stiffness

[PiaKoerz]

Hi there,

I'm currently analysing a 3D model of a building and for the Pushover-Analysis I also wanted to plot a graph of the force of each storey over the deformation, so that I can calculate the stiffness of each storey individually. I already read that there is some kind of storey stiffness, that sap2000 calculates automatically, but I can't find it in the Version 21.2.0. The building is rather big therefore I'd be happy to not calculate a lot by hand....

Does anybody know, if there is any kind of output that I could use for this analyse?
Thanks in advance!

 

[GJoeRMK]

You can calculate a pseudo story stiffness by just dividing the story force by the deformation on the required direction, since you are doing a non linear analysis you should decide in what state you want to measure the stifnesss, it could be stiffness at yield, at maximun force or at ultimate deformation.