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Liquid storage tanks are crucial in industrial infrastructure, but they face significant risks during seismic events. This paper presents a framework to assess the seismic vulnerability of ground-supported tanks by developing fragility curves using Incremental Dynamic Analysis (IDA). The approach combines finite element modelling with a simplified Double Degree of Freedom (2DoF) spring system in OpenSeesPy to capture the tank’s dynamic response. Fragility curves are generated for four key failure modes: liquid spillage, base shear-induced buckling, overturning, and elephant foot buckling. These curves offer insights into failure probabilities across seismic intensities, supporting improved resilience measures for tanks in earthquake-prone areas.

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Fragility Curves of Deformed Ground-Supported Liquid Storage Tanks

  • 会议论文

  • 发表日期：

    2025年

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  • Raihan Rahmat Rabi,
  • Giorgio Monti

摘要

Liquid storage tanks are crucial in industrial infrastructure, but they face significant risks during seismic events. This paper presents a framework to assess the seismic vulnerability of ground-supported tanks by developing fragility curves using Incremental Dynamic Analysis (IDA). The approach combines finite element modelling with a simplified Double Degree of Freedom (2DoF) spring system in OpenSeesPy to capture the tank’s dynamic response. Fragility curves are generated for four key failure modes: liquid spillage, base shear-induced buckling, overturning, and elephant foot buckling. These curves offer insights into failure probabilities across seismic intensities, supporting improved resilience measures for tanks in earthquake-prone areas.