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<p>This paper presents a first-of-its-kind study that focuses on developing seismic fragility and vulnerability loss curves for code-conforming and non-conforming reinforced concrete (RC) bridge piers that typically exist in Pakistan. Six bridge piers i.e. RC Un-Retrofitted (Conforming), RC Un-Retrofitted (Non-Conforming), RC Jacket (Conforming), RC Jacket (Non-Conforming), ECC Jacket (Conforming) and ECC Jacket (Non-Conforming) were analyzed using nonlinear pushover and incremental dynamic analysis procedures. ECC (engineered cementitious composites) jackets were more promising than RC jackets in enhancing the lateral capacity of both conforming and non-conforming un-retrofitted piers. Furthermore, fragility analysis showed that the near collapse probability of exceedance of RC Un-Retrofitted (Non-Conforming), RC Jacket (Non-Conforming) and ECC Jacket (Non-Conforming) was 90%, 71% and 62% respectively at 0.82&#xa0;g. On the other hand, the near collapse probability of exceedance of RC Un-Retrofitted (Conforming), RC Jacket (Conforming) and ECC Jacket (Conforming) was 71%, 64% and 57% respectively at 0.82&#xa0;g. Moreover, RC Un-Retrofitted (Non-Conforming), RC Un-Retrofitted (Conforming), RC Jacket (Non-Conforming), RC Jacket (Conforming), ECC Jacket (Non-Conforming) and ECC Jacket (Conforming) achieved 40% loss ratio at approximately 0.11&#xa0;g, 0.27&#xa0;g, 0.35&#xa0;g, 0.38&#xa0;g, 0.38&#xa0;g and 0.45&#xa0;g respectively. The findings of the study will provide guidelines for seismic risk assessment and decision-making.</p>

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Fragility and vulnerability assessment of code-conforming and non-conforming RC Bridge piers retrofitted with ECC jackets

  • 期刊论文

  • 发表日期：

    2025年4月17日

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  • Muhammad Shoaib Khan,
  • Muhammad Rizwan

摘要

This paper presents a first-of-its-kind study that focuses on developing seismic fragility and vulnerability loss curves for code-conforming and non-conforming reinforced concrete (RC) bridge piers that typically exist in Pakistan. Six bridge piers i.e. RC Un-Retrofitted (Conforming), RC Un-Retrofitted (Non-Conforming), RC Jacket (Conforming), RC Jacket (Non-Conforming), ECC Jacket (Conforming) and ECC Jacket (Non-Conforming) were analyzed using nonlinear pushover and incremental dynamic analysis procedures. ECC (engineered cementitious composites) jackets were more promising than RC jackets in enhancing the lateral capacity of both conforming and non-conforming un-retrofitted piers. Furthermore, fragility analysis showed that the near collapse probability of exceedance of RC Un-Retrofitted (Non-Conforming), RC Jacket (Non-Conforming) and ECC Jacket (Non-Conforming) was 90%, 71% and 62% respectively at 0.82 g. On the other hand, the near collapse probability of exceedance of RC Un-Retrofitted (Conforming), RC Jacket (Conforming) and ECC Jacket (Conforming) was 71%, 64% and 57% respectively at 0.82 g. Moreover, RC Un-Retrofitted (Non-Conforming), RC Un-Retrofitted (Conforming), RC Jacket (Non-Conforming), RC Jacket (Conforming), ECC Jacket (Non-Conforming) and ECC Jacket (Conforming) achieved 40% loss ratio at approximately 0.11 g, 0.27 g, 0.35 g, 0.38 g, 0.38 g and 0.45 g respectively. The findings of the study will provide guidelines for seismic risk assessment and decision-making.