Earthquakes and Structures

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Seismic performance evaluation of moment frames with slit-friction hybrid dampers

  • Lee, Joonho (Department of Civil and Architectural Engineering, Sungkyunkwan University) ;
  • Kim, Jinkoo (Department of Civil and Architectural Engineering, Sungkyunkwan University)
  • Received : 2014.07.04
  • Accepted : 2015.07.21
  • Published : 2015.12.25
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Abstract

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.

Keywords

Acknowledgement

Supported by : Ministry of Land, Infrastructure and Transport

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