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<p>Metallic dampers are critical components in structural engineering for seismic energy dissipation. This study investigates the performance of bolted metal dampers, specifically focusing on the influence of additional nuts placed in the free zone of the bolts. While conventional dampers often face premature buckling issues in diagonal steel cross members (SCM), the proposed configuration aims to mitigate this by enhancing lateral stability. Experimental tests were conducted on various damper configurations to evaluate their load-carrying capacity, energy dissipation, and failure modes. It is the location and number of nuts used in their free zones as a parameter in the five types of bolted metallic dampers used in the experiments. The results demonstrate that the strategic arrangement of nuts in the free region significantly prevents bolt buckling, leading to a substantial increase in energy absorption and structural resilience. Specifically, the implementation of nuts improved the seismic the lateral load carrying performance by about %30 compared to standard bolted dampers. This research provides a cost-effective and practical solution for improving the seismic safety of steel beam-column joints.</p>

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A Novel Approach for Enhancing Energy Dissipation in Bolted Dampers: Strategic Nut Arrangement in the Free Zone

  • 期刊论文

  • 发表日期：

    2026年5月21日

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  • Fatih Bahadir,
  • Fatih Suleyman Balik

摘要

Metallic dampers are critical components in structural engineering for seismic energy dissipation. This study investigates the performance of bolted metal dampers, specifically focusing on the influence of additional nuts placed in the free zone of the bolts. While conventional dampers often face premature buckling issues in diagonal steel cross members (SCM), the proposed configuration aims to mitigate this by enhancing lateral stability. Experimental tests were conducted on various damper configurations to evaluate their load-carrying capacity, energy dissipation, and failure modes. It is the location and number of nuts used in their free zones as a parameter in the five types of bolted metallic dampers used in the experiments. The results demonstrate that the strategic arrangement of nuts in the free region significantly prevents bolt buckling, leading to a substantial increase in energy absorption and structural resilience. Specifically, the implementation of nuts improved the seismic the lateral load carrying performance by about %30 compared to standard bolted dampers. This research provides a cost-effective and practical solution for improving the seismic safety of steel beam-column joints.