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<p>Using materials with low yield strength and high ductility is considered a suitable option for manufacturing yielding dampers. In this study, the use of aluminum U-shaped dampers (AUDs) as energy dissipation systems in steel frames was proposed. Subsequently, following the calibration of the numerical model for AUDs, the influence of their dimensions on seismic parameters was investigated. Furthermore, the impact of the proposed damper on the steel frame under cyclic loading was evaluated. The outputs of these analyses included energy dissipation, strength, stiffness, and the equivalent damping ratio. Additionally, the axial forces applied to the columns were assessed. The model results show that increasing the damper thickness and decreasing its radius enhance the seismic parameters. Equipping the steel frame with AUDs increased its strength, energy dissipation, and stiffness by 1.81, 2.14, and 10.48 times, respectively. The axial forces in columns increase relative to damper strength as the number of dampers decreases, with 8 dampers showing the lowest values. The comparison of the impact of AUD dampers on steel frames with other types of steel dampers demonstrated that due to their high ductility, AUDs can serve as a suitable alternative to steel dampers for enhancing seismic performance.</p>

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Numerical and Analytical Study of the Seismic Behavior of U-Shaped Aluminum Dampers and Their Impact on Steel Frames

  • 期刊论文

  • 发表日期：

    2025年2月25日

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  • Farbod Daemi,
  • Mohammad Reza Habibi,
  • Mohammad Hadi Tavana,
  • Hamed Eivani

摘要

Using materials with low yield strength and high ductility is considered a suitable option for manufacturing yielding dampers. In this study, the use of aluminum U-shaped dampers (AUDs) as energy dissipation systems in steel frames was proposed. Subsequently, following the calibration of the numerical model for AUDs, the influence of their dimensions on seismic parameters was investigated. Furthermore, the impact of the proposed damper on the steel frame under cyclic loading was evaluated. The outputs of these analyses included energy dissipation, strength, stiffness, and the equivalent damping ratio. Additionally, the axial forces applied to the columns were assessed. The model results show that increasing the damper thickness and decreasing its radius enhance the seismic parameters. Equipping the steel frame with AUDs increased its strength, energy dissipation, and stiffness by 1.81, 2.14, and 10.48 times, respectively. The axial forces in columns increase relative to damper strength as the number of dampers decreases, with 8 dampers showing the lowest values. The comparison of the impact of AUD dampers on steel frames with other types of steel dampers demonstrated that due to their high ductility, AUDs can serve as a suitable alternative to steel dampers for enhancing seismic performance.