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<p>To assess the importance of bridges in road networks and achieve uniform traffic loss risk in seismic design, this paper introduces a novel bridge seismic design methodology incorporating the Seismic Importance Adjustment Factor (<i>SIAF</i>) and uniform traffic loss risk. The key technical contributions are as follows: (1) defining <i>SIAF</i> and developing an integrated framework that couples seismic design with traffic loss risk assessment; (2) proposing a calculation method for traffic loss risk that accounts for traffic demand variations during different periods of the day, uncertainties in post-earthquake bridge repair times, and dynamic traffic flow reassignment in post-earthquake road networks; (3) establishing design indicators for traffic loss risk and defining five seismic risk design levels based on historical disaster data; (4) validating the methodology through case studies on bridges and road networks, demonstrating how <i>SIAF</i> interconnects seismic design with risk-based design targets and adapt seismic design standards to varying network redundancies. The research demonstrates that <i>SIAF</i> can quantify bridge importance within complex road networks and provide a practical reference for the development of seismic design standards.</p>

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Bridge seismic design method incorporating seismic importance adjustment factor and uniform traffic loss risk

  • 期刊论文

  • 发表日期：

    2025年1月27日

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  • Qiang Lian,
  • Weidong Zhuo,
  • Xinzhi Dang,
  • Qiwei Zhang

摘要

To assess the importance of bridges in road networks and achieve uniform traffic loss risk in seismic design, this paper introduces a novel bridge seismic design methodology incorporating the Seismic Importance Adjustment Factor (SIAF) and uniform traffic loss risk. The key technical contributions are as follows: (1) defining SIAF and developing an integrated framework that couples seismic design with traffic loss risk assessment; (2) proposing a calculation method for traffic loss risk that accounts for traffic demand variations during different periods of the day, uncertainties in post-earthquake bridge repair times, and dynamic traffic flow reassignment in post-earthquake road networks; (3) establishing design indicators for traffic loss risk and defining five seismic risk design levels based on historical disaster data; (4) validating the methodology through case studies on bridges and road networks, demonstrating how SIAF interconnects seismic design with risk-based design targets and adapt seismic design standards to varying network redundancies. The research demonstrates that SIAF can quantify bridge importance within complex road networks and provide a practical reference for the development of seismic design standards.