This research includes the procedures of applying the nonlinear static analysis (pushover
analysis) on seismic resistance concrete frame systems by modeling the foundation
system (soil + footing) down the structure as an elastic springs and rocking
stiffness and
comparing them with premise of fixed support in terms of the deformation and
displacement, load and stress distribution in frame elements and accordingly clarifying
the effect of improving soil on foundation system stiffness and on the responding of frame
to lateral loads which helps in moving the structure performance from low level to a higher
level that we need from structure to reach following the design strategy that we choose for
the structure.
