Seismosoft | Earthquake Engineering Solutions

Hi!
I have done a pushover analysis of a steel cantilever beam. It has a rectangulae fiber section.

multiplying curvature by EI I get the moment...but it's not the same moment calculated by seismostruct. Why?

thanks

Two methods are typically followed to formulate distribuited plasticity frame models: displacement- and foced-based formulations. What kind of formulation is implement in seismostruct?
thanks
Giova[:D]