Comparative performance of friction damped systems and base isolation systems for earthquake retrofit and aseismic design

Abstract The seismic performance of a steel framed structure equipped with (i) friction damping devices and (ii) base isolators is compared. A parametric study based on energy concepts is performed first using time‐history dynamic analysis to determine the optimum properties of the two systems when excited by an earthquake whose energy is distributed over a relatively broad frequency band (1940 El Centro, N‐S). Using these same properties, the …