Investigating the effect of steel ring damper on the seismic performance of concrete frames by numerical method

Cheraghi, Kambiz; Mahdiani, Hamed; Rezaeichaghabalaki, Omid; Tavana, Mohammad Hadi

doi:10.48303/jsee.2024.2018297.1084

Investigating the effect of steel ring damper on the seismic performance of concrete frames by numerical method

Articles in Press

Document Type : Research Article

Authors

Kambiz cheraghi ¹

Hamed Mahdiani ²

Omid Rezaeichaghabalaki ³

Mohammad Hadi Tavana ²

¹ kermanshaDepartment of Civil Engineering, Razi University, Kermanshah, Iran.

² Department of Civil Engineering, Islamic Azad University, Kermanshah, Iran.

³ Department of Civil Engineering, Razi University, Kermanshah, Iran.

10.48303/jsee.2024.2018297.1084

Abstract

Steel ring dampers are a type of yielding dampers that have a good energy dissipation capability. In this research, parametric studies were conducted to investigate the influence of the radius and thickness of the steel ring damper (SRD) on the seismic behavior of the RC frame. The numerical model was first calibrated with two experimental samples, then the impact of the damper on the concrete frame was investigated by performing pushover analysis. Simplified two-line curves were then obtained to calculate the seismic parameters of the frame, including stiffness, strength, ductility, and energy dissipation parameters. To estimate the elastic stiffness and ultimate strength of the concrete frame equipped with SRD, approximate equations were presented that were in good agreement with the numerical results. Finally, the most influential variables on the results were also identified. The results showed that reducing the radius of the damper and increasing its thickness increases the stiffness and strength of the frame. Also, increasing the thickness of the damper increases the energy dissipation and reduces the ductility of the frame. It was also observed that if the stiffness ratio of the damper to the bare frame is set to 4.1, the energy dissipation and ductility of the RC frame will be 2 times that of the bare frame.

Keywords

Steel ring damper

Energy dissipation

RC frame

Numerical Analysis

pushover analysis

Subjects