Steel and Composite Structures

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Improving the hysteretic behavior of Concentrically Braced Frame (CBF) by a proposed shear damper

  • Ghamari, Ali (Department of Civil Engineering, Sharif University of Technology) ;
  • Haeri, Hadi (MOE Key Laboratory of Deep Underground Science and Engineering, School of Architecture and Environment, Sichuan University) ;
  • Khaloo, Alireza (Department of Civil Engineering, Sharif University of Technology) ;
  • Zhu, Zheming (MOE Key Laboratory of Deep Underground Science and Engineering, School of Architecture and Environment, Sichuan University)
  • Received : 2018.10.13
  • Accepted : 2019.02.23
  • Published : 2019.02.25
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Abstract

Passive steel dampers have shown favorable performance in last earthquakes, numerical and experimental studies. Although steel dampers are more affordable than other types of damper, they are not economically justified for ordinary buildings. Therefore, in this paper, an innovative steel damper with shear yielding mechanism is introduced, which is easy to fabricate also can be easily replaced after sever earthquakes. The main goal of implementing such a mechanism is to control the possible damage in the damper and to ensure the elastic behavior of other structural components. The numerical results indicate an enhancement of the hysteretic behavior of the concentrically braced frames utilizing the proposed damper. The proposed damper change brittle behavior of brace due to buckling to ductile behavior due to shear yielding in proposed damper. The necessary relations for the design of this damper have been presented. In addition, a model has been presented to estimate load-displacement of the damper without needing to finite element modeling.

Keywords

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