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<p>A self-centering multi-stage yielding energy-dissipating brace (SC-MYB) is proposed, and its fundamental configuration and operating mechanism are presented. A theoretical analysis of the mechanical behavior of the SC-MYB is conducted, and a corresponding restoring force model is established. Through low-cycle loading tests, the experimental phenomena, hysteretic behavior, characteristic loads, and energy-dissipation capacity of the brace are systematically investigated. Results indicate that the brace exhibits full flag-shaped hysteretic characteristics with stable energy-dissipation capacity and excellent self-centering capabilities. The hysteretic behavior is influenced by factors such as the stiffness of combined disc springs, pre-compression displacement, and width of metallic energy-dissipating plates. The predicted results from the restoring-force model are consistent with experimental data, validating the effectiveness and accuracy of the theoretical model. Based on these findings, design recommendations are proposed for the specimen, providing valuable references for engineering applications.</p>

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Experimental and mechanical behavior investigation on self-centering braces with multi-stage yield energy dissipation

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Chen Chen,
  • Wei-hui Zhong,
  • Shi-chao Duan,
  • Xuan Zhang,
  • Zheng Tan,
  • Wen-hao Fang

摘要

A self-centering multi-stage yielding energy-dissipating brace (SC-MYB) is proposed, and its fundamental configuration and operating mechanism are presented. A theoretical analysis of the mechanical behavior of the SC-MYB is conducted, and a corresponding restoring force model is established. Through low-cycle loading tests, the experimental phenomena, hysteretic behavior, characteristic loads, and energy-dissipation capacity of the brace are systematically investigated. Results indicate that the brace exhibits full flag-shaped hysteretic characteristics with stable energy-dissipation capacity and excellent self-centering capabilities. The hysteretic behavior is influenced by factors such as the stiffness of combined disc springs, pre-compression displacement, and width of metallic energy-dissipating plates. The predicted results from the restoring-force model are consistent with experimental data, validating the effectiveness and accuracy of the theoretical model. Based on these findings, design recommendations are proposed for the specimen, providing valuable references for engineering applications.