Earthquakes and Structures

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Seismic resilience evaluation of RC-MRFs equipped with passive damping devices

  • Received : 2019.11.06
  • Accepted : 2020.01.04
  • Published : 2020.03.25
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Abstract

The use of passive energy dissipation devices has been widely used in the construction industry to minimize the probability of damage occurred under intense ground motion. In this study, collapse margin ratio (CMR) and fragility curves are the main parameters in the assessment to characterize the collapse safety of the structures. The assessment is done on three types of RC frame structures, incorporating three types of dampers, viscoelastic, friction, and BRB dampers. The Incremental dynamic analyses (IDA) were performed by simulating an array of 20 strong ground motion (SGM) records considering both far-field and near-field seismic scenarios that were followed by fragility curves. With respect to far-field ground motion records, the CMR values of the selected frames indicate to be higher and reachable to safety margin more than those under near-field ground motion records that introduce a high devastating impact on the structures compared to far-field excitations. This implies that the near field impact affects the ground movements at the site by attenuation the direction and causing high-frequency filtration. Besides that, the results show that the viscoelastic damper gives better performance for the structures in terms of reducing the damages compared to the other energy dissipation devices during earthquakes.

Keywords

Acknowledgement

Supported by : Universiti Sains Malaysia

This study is financially supported by Universiti Sains Malaysia, under the Research University Individual (RUI) Grant Scheme (8014080).

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