Structural Engineering and Mechanics

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Numerical and analytical investigation of cyclic behavior of D-Shape yielding damper

  • Kambiz Cheraghi (Department of Civil Engineering, Faculty of Engineering, Razi University) ;
  • Mehrzad TahamouliRoudsari (Department of Civil Engineering, Kermanshah Branch, Islamic Azad University) ;
  • Sasan Kiasat (Department of Civil and Environmental Engineering, AmirKabir University) ;
  • Kaveh Cheraghi (Department of Mechanical Engineering, Engineering Faculty, Razi University)
  • Received : 2023.11.24
  • Accepted : 2024.02.16
  • Published : 2024.02.25
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Abstract

The purpose of this research was to investigate the cyclic behavior of the D-shaped dampers (DSD). Similarly, at first, the numerical model was calibrated using the experimental sample. Then, parametric studies were conducted in order to investigate the effect of the radius and thickness of the damper on energy dissipation, effective and elastic stiffness, ultimate strength, and equivalent viscous damping ratio (EVDR). An analytical equation for the elastic stiffness of the DSD was also proposed, which showed good agreement with experimental results. Additionally, approximate equations were introduced to calculate the elastic and effective stiffness, ultimate strength, and energy dissipation. These equations were presented according to the curve fitting technique and based on numerical results. The results indicated that reducing the radius and increasing the thickness led to increased energy dissipation, effective stiffness, and ultimate strength of the damper. On the other hand, increasing the radius and thickness resulted in an increase in EVDR. Moreover, the ratio of effective stiffness to elastic stiffness also played a crucial role in increasing the EVDR. The thickness and radius of the damper were evaluated as the most effective dimensions for reducing energy dissipation and EVDR.

Keywords

References

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