Optimal Seismic Design of Stiffness and Gap of Hysteretic-Viscous Hybrid Damper System in Nonlinear Building Frames for Simultaneous Reduction of Interstory Drift and Acceleration

The viscous-hysteretic hybrid (HVH) damper system recently introduced by one of the authors has a clear property that, when hysteretic dampers with gap mechanism become active (stiffness element starts working), acceleration building frames this as stopper attains large values in spite advantageous feature to prevent excessive deformation. It is therefore desired that both maximum interstory drift and exhibit an acceptable value appropriate compromise. double impulse simplified version one-cycle sine wave representative main part near-fault ground motions can simulate drifts properly. However, it cannot accelerations due its impulsive nature. In case, corresponding play important role reliable simulation accelerations. Even such circumstance, analysis using because enables obtain critical timing input, i.e. nonlinear resonant frequency without repetition. investigations on criticality show leads view drift, top relative for constant input velocity except some cases. demonstrated finally index terms be parameter deriving optimally compromised quantity various levels stiffness ratios.