Comparison performance level of frame eight -story steel with increase X-bracing with and without base isolation)

The purpose of this paper is to describe effect of stiffness in performance level and behavior of story steel frame with increase x-bracing (with and without base Isolation This frame hasx-braced Total profiles used in this structure are in kind of ss275 ands355of EuropeanstandardCapacitycurve and target displacement and performance of structurearementionedabove)are calculated by SAP2000 program and displacement coefficient method and with nonlinear static analysis. Existence of base Isolation in structure cause to create increasing of period and displacement and decreasing of earthquake force and base shear andetc.

Keywords:

Capacity curve , Target Displacement , Period