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Earthquakes and Structures
  Volume 9, Number 6, December 2015 , pages 1291-1311

Seismic performance evaluation of moment frames with slit-friction hybrid dampers
Joonho Lee and Jinkoo Kim

    This study investigates the seismic energy dissipation capacity of a hybrid passive damper composed of a friction and a hysteretic slit damper. The capacity of the hybrid device required to satisfy a given target performance of a reinforced concrete moment resisting frame designed with reduced design base shear is determined based on the ASCE/SEI 7-10 process, and the seismic performances of the structures designed without and with the hybrid dampers are verified by nonlinear dynamic analyses. Fragility analysis is carried out to investigate the probability of a specified limit state to be reached. The analysis results show that in the structure with hybrid dampers the residual displacements are generally reduced and the dissipated inelastic energy is mostly concentrated on the dampers. At the Moderate to Extensive damage states the fragility turned out to be smallest in the structure with the hybrid dampers.
Key Words
    hybrid dampers; slit dampers; friction dampers; seismic performance; fragility analysis
Department of Civil and Architectural Engineering, Sungkyunkwan University, Cheoncheon-dong, Suwon, Korea

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