Seismic fragility analysis of a coupled tank-piping system based on artificial ground motions and surrogate modeling

The catastrophic consequences of recent NaTech events triggered by earthquakes highlighted the inadequacy standard approaches to seismic risk assessment chemical process plants. To date, such facilities mainly relies on historical data and focuses uncoupled components. As a consequence, dynamic interaction between equipment is neglected. In response this gap, researchers started progressive integration Pacific Earthquake Engineering Research Center (PEER) Performance-Based (PBEE) framework. However, few limitations still prevent systematic implementation framework most significant are: (i) computational cost system-level simulations accounting for coupling equipment; (ii) experimental component-level model validation; (iii) reduced number hazard-consistent site-specific ground motion records time history analyses. these challenges, paper proposes recently developed uncertainty quantification-based perform fragility assessments employs three key elements: stochastic ground-motion supplement scarcity real records; surrogate modeling reduce simulations; validation based cost-effective hybrid simulation tests. order demonstrate potential framework, two functions are computed pipe elbow coupled tank-piping system.