Analytical and Experimental Study on a New Stud-type Hysteretic and Visco-elastic Hybrid Damper System

This paper proposes a new stud-type hybrid damper system for residential houses and building structures. The proposed vibration control system consists of braces, upper and lower rigid frames and a damper unit including hysteretic and viscoelastic dampers (high-hardness rubber). The proposed vibration control system has a high damping capacity and a stable damping performance in a broad response range. A simplified design method for hybrid dampers is then proposed. The proposed design method enables not only to design the hybrid damper system but also to predict its damping capacity in the design stage. Theoretical and analytical studies are carried out using an equivalent linearization method and a time-history response analysis to investigate the damping performance of the proposed vibration control system. Loading tests with full-scale models are conducted to verify the damping capacity of the proposed vibration control system, and to clarify the validity of the proposed simplified design method. The accuracy of the analytical models is evaluated through the comparison of the test results with those of analytical studies. Finally, a nonlinear time-history response analysis is conducted to examine the performance of the proposed vibration control systems in the response reduction of practical residential houses.