Structural Engineering and Mechanics

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Parametric studies of cyclic behavior of bar damper and its effect on steel frames

  • Kambiz Cheraghi (Department of Civil Engineering, Faculty of Engineering, Razi University) ;
  • Mehrzad TahamouliRoudsari (Department of Civil Engineering, Kermanshah Branch, Islamic Azad University) ;
  • Reza Aghayari (Department of Civil Engineering, Faculty of Engineering, Razi University) ;
  • Kaveh Cheraghi (Department of Mechanical Engineering, Engineering Faculty, Razi University)
  • Received : 2024.08.03
  • Accepted : 2024.10.07
  • Published : 2024.10.25
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Abstract

In this study, the cyclic behavior of Bar Damper (BD) and its effect on the seismic performance of the steel frame was investigated using numerical and analytical methods. Initially, the calibrated model was used to conduct parametric studies on the cyclic behavior of the damper. The purpose of parametric studies was to provide equations for calculating effective and elastic stiffness, ultimate strength, and energy dissipation using its diameter and height. The impact of BD on the steel frame was examined in the second section of the research. In this section, studies were conducted using pushover analysis to investigate the impact of BD on the elastic stiffness, energy absorption, ductility, and strength of the frame. The results demonstrated that increasing the height of the BDs resulted in higher energy dissipation. However, reducing the height and increasing the diameter increased effective stiffness, yield strength, and elastic stiffness. The EVDR results showed that the diameter of the damper has a negligible effect on it, and its value increases with the decrease in height. In the best case, the addition of BD causes a 23% increase in energy dissipation and a 60% increase in frame ductility.

Keywords

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