Steel and Composite Structures

  • 제53권2호
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  • Pages.195-208
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  • 2024
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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Numerical and analytical study of cyclic behavior of TADAS and the impact of axial force on its performance

  • 투고 : 2024.04.04
  • 심사 : 2024.10.08
  • 발행 : 2024.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

This study focused on the cyclic behavior of Triangular-plate Added Damping and Stiffness (TADAS) and the impact of axial force on its performance. First, the numerical model was verified, and the impact of damper dimensions on elastic and effective stiffness, ultimate strength, energy dissipation, and equivalent viscous damping ratio (EVDR) was studied. The numerical results were then used to propose approximate equations to estimate these findings. In the second section, the buckling load of TADAS was calculated analytically, and an approximate equation was presented to facilitate estimation. The effects of axial force on elastic stiffness, ductility, and ultimate strength were then investigated. This study found that decreasing the height, increasing the width, and increasing the middle width of TADAS improved its energy absorption, effective stiffness, and ultimate strength. The EVDR results improved with decreasing height, increasing width, and middle width. Approximate equations provided results that were close to numerical results, indicating that they are reliable for calculating seismic parameters. The damper's ultimate strength was most affected by the axial force. In the most affected model, an increase in axial force of 0.025 Pcr (Buckling load of the damper) reduced ultimate strength, ductility, and elastic stiffness by 26%, 22%, and 16%, respectively.

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