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<p>To elucidate the torsion characteristics of U-shaped steel dampers used in base seismic isolation, a mechanical model was established to describe the torsion plastic failure of the damper, and the formula for the theoretical calculation of its mechanical properties was derived. The proposed model compensates for the shortcomings of traditional prediction formulas that introduce empirical coefficients. A total of 40 U-shaped steel dampers with different width, radius, and thickness were designed and fabricated, and unidirectional loading tests were carried out by designing an appropriate fixture. The experimental results are close to the theoretical analysis results, confirming the rationality of the theoretical formula. The results reveal that the initial stiffness can be reduced by increasing the arc radius, and the initial stiffness can be increased by increasing the thickness and width.</p>

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Torsion Deformation Mechanical Properties of U-Shaped Steel Damper under Lateral Loading

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • Jinhe Gao,
  • Weihao Zhou,
  • Yuwen Xu,
  • Baozhu Zheng,
  • Qingrui Lu,
  • Baokui Chen

摘要

To elucidate the torsion characteristics of U-shaped steel dampers used in base seismic isolation, a mechanical model was established to describe the torsion plastic failure of the damper, and the formula for the theoretical calculation of its mechanical properties was derived. The proposed model compensates for the shortcomings of traditional prediction formulas that introduce empirical coefficients. A total of 40 U-shaped steel dampers with different width, radius, and thickness were designed and fabricated, and unidirectional loading tests were carried out by designing an appropriate fixture. The experimental results are close to the theoretical analysis results, confirming the rationality of the theoretical formula. The results reveal that the initial stiffness can be reduced by increasing the arc radius, and the initial stiffness can be increased by increasing the thickness and width.