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InSMA-friction dampers this paper, an SMA-friction damperDampers, SMA-friction damping control method for large-span truss string structuresTruss string structure is proposed to analyze the seismic response of six different brace replacement schemes with a 126.6 m span structure as object. Through the additional modal damping ratio replacement index, it is clarified that the dampers should preferentially focus on replacing the mid-span braces, and the vertical acceleration and peak cable stress damping rates can reach 49.11% and 16.89%, respectively. The study shows that with the increase of replacement rate and seismic intensity, the damping effect is enhanced; however, the sliding friction and equivalent stiffness are too large will weaken the damping performance.

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Research on Vibration Mitigation of Large-Span Truss String Structure by Replacing Struts with SMA-Friction Dampers

  • 会议论文

  • 发表日期：

    2026年

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  • Xiyue Yang,
  • Zhonglin Zhang

摘要

InSMA-friction dampers this paper, an SMA-friction damperDampers, SMA-friction damping control method for large-span truss string structuresTruss string structure is proposed to analyze the seismic response of six different brace replacement schemes with a 126.6 m span structure as object. Through the additional modal damping ratio replacement index, it is clarified that the dampers should preferentially focus on replacing the mid-span braces, and the vertical acceleration and peak cable stress damping rates can reach 49.11% and 16.89%, respectively. The study shows that with the increase of replacement rate and seismic intensity, the damping effect is enhanced; however, the sliding friction and equivalent stiffness are too large will weaken the damping performance.