Development and Cyclic Behavior of U-Shaped Steel Dampers with Perforated and Nonparallel Arm Configurations

Kurtulus Atasever*, Oguz C. Celik, Ercan Yuksel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1741-1753
Number of pages13
JournalInternational Journal of Steel Structures
Volume18
Issue number5
DOIs
Publication statusPublished - 1 Dec 2018

Bibliographical note

Publisher Copyright:
© 2018, Korean Society of Steel Construction.

Keywords

  • Finite element analysis
  • Hysteretic behavior
  • Metallic dampers
  • Seismic isolation

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