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

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 inv...

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Bibliographic Details
Published in:International journal of steel structures 2018-12, Vol.18 (5), p.1741-1753
Main Authors: Atasever, Kurtulus, Celik, Oguz C., Yuksel, Ercan
Format: Article
Language:English
Subjects:
Civil Engineering
Configurations
Damping ratio
Earthquake damage
Earthquake dampers
Engineering
Finite element method
Fuses
Isolation systems
Materials Science
Mathematical models
Seismic design
Seismic engineering
Seismic isolation
Seismic response
Solid Mechanics
Stiffness
Structural damage
Three dimensional models
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Summary: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.
ISSN:1598-2351
2093-6311
DOI:10.1007/s13296-018-0074-2