modeling and investigation of the floor isolation effect and application of yeilding dampers by nonlinear dynamic analysis

The decrease in the seismic demand of structures is one of the important research areas among earthquake and structure researchers. different approaches have been presented in this regard. one of the effective approaches is using seismic isolators against seismic forces, which limits the internal energy of structural components, thereby reducing structural components damage (soong, 1990). one type of isolators is active isolator. this system, using an external source, can control the energy of the structural vibrations under lateral forces. therefore, the absorbed energy by thestructural components is limited (soong and constantinou, 1994). another type of isolators is base isolation. this system can limit the entered energy to the structure and do not let the structural components experience great damage (skinner, 1993). floor isolation of buildings is one type of seismic isolation systems (lyan-ywan lu et al., 2013; shi et al., 2012).yielding dampers, as passive dampers, are the other effective approaches in structural control. in this research, the seismic behavior of the structure combined with yielding dampers and floor seismic isolation is investigated.