International journal of steel structures (국제강구조저널)

Korean Society of Steel Construction (한국강구조학회)
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Development and Cyclic Behavior of U-Shaped Steel Dampers with Perforated and Nonparallel Arm Configurations

  • Atasever, Kurtulus (Department of Architecture, Mimar Sinan Fine Arts University (MSGSU)) ;
  • Celik, Oguz C. (Structural and Earthquake Engineering Division, Faculty of Architecture, Istanbul Technical University (ITU)) ;
  • Yuksel, Ercan (Faculty of Civil Engineering, Istanbul Technical University (ITU), Maslak Campus)
  • Received : 2018.02.13
  • Accepted : 2018.05.02
  • Published : 2018.12.31
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Abstract

Metallic dampers are sacrificial devices (fuses) that dissipate significant energy during earthquakes while protecting other parts of structures from possible damage. In addition to numerous implementation opportunities of other base isolation systems, U-shaped dampers (UD) are one of the widely investigated and used devices in practice especially in Japan. The present study focuses on enhancing seismic performance of these types of dampers by changing their geometric properties. UDs with perforated (i.e. with holes) and/or nonparallel arms are developed for this purpose. For a better comparison, the criterion of equal material volume (or mass) has been utilized. Three dimensional finite element models of the new type of UDs are formed and investigated numerically under selected displacement histories. Based on the obtained hysteretic curves; dissipated energy intensities, effective stiffness ratios, reaction forces, effective damping ratios are evaluated in this parametric study. It is found that both damper types have merits in use of seismic applications and that the selection of the damper configuration is dependent on the design specific issues.

Keywords

References

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