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<p>This review presents available methodologies for assessing the seismic fragility of reinforced concrete (RC) bridges. They have focused particularly on the use of Incremental Dynamic Analysis (IDA) in analytical methods; how the presence of soil–structure interaction (SSI); and seismic isolation affects the distribution of seismic demand in bridge structures. The authors have also synthesized existing research related to ground motion intensity measures. Their research has identified that the applicability of these intensity measures is dependent upon characteristics of the bridge, configuration of the structure, and seismic conditions. The authors have also evaluated the effect of modeling assumptions, boundary conditions, and analytical frameworks on fragility estimates. Finally, the authors conclude that to achieve improved levels of accuracy and reliability in the evaluation of seismic fragility of RC bridges an integrated system approach must be adopted which combines realistic behavior of the soil–foundation system, suitable intensity measures, and advanced analytical techniques.</p>

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Seismic fragility assessment of reinforced concrete bridges: a comprehensive review of methodologies, isolators, and soil structure interaction

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • Ashwini Satyanarayana,
  • Dushyanth V. Babu R,
  • H. M. Sheethal,
  • L. Geetha

摘要

This review presents available methodologies for assessing the seismic fragility of reinforced concrete (RC) bridges. They have focused particularly on the use of Incremental Dynamic Analysis (IDA) in analytical methods; how the presence of soil–structure interaction (SSI); and seismic isolation affects the distribution of seismic demand in bridge structures. The authors have also synthesized existing research related to ground motion intensity measures. Their research has identified that the applicability of these intensity measures is dependent upon characteristics of the bridge, configuration of the structure, and seismic conditions. The authors have also evaluated the effect of modeling assumptions, boundary conditions, and analytical frameworks on fragility estimates. Finally, the authors conclude that to achieve improved levels of accuracy and reliability in the evaluation of seismic fragility of RC bridges an integrated system approach must be adopted which combines realistic behavior of the soil–foundation system, suitable intensity measures, and advanced analytical techniques.