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Seismic fragility analysis based on artificial ground motions and surrogate modeling of validated structural simulators
Author(s) -
Abbiati Giuseppe,
Broccardo Marco,
Abdallah Imad,
Marelli Stefano,
Paolacci Fabrizio
Publication year - 2021
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.3448
Subject(s) - fragility , seismic hazard , incremental dynamic analysis , bridge (graph theory) , hazard , computer science , sensitivity (control systems) , earthquake engineering , ground motion , kriging , surrogate model , engineering , structural engineering , machine learning , civil engineering , medicine , chemistry , organic chemistry , electronic engineering
This study introduces a computational framework for efficient and accurate seismic fragility analysis based on a combination of artificial ground motion modeling, polynomial‐chaos‐based global sensitivity analysis, and hierarchical kriging surrogate modeling. The framework follows the philosophy of the Performance‐Based Earthquake Engineering PEER approach, where the fragility analysis is decoupled from hazard analysis. This study addresses three criticalities that are present in the current practice. Namely, reduced size of hazard‐consistent size‐specific ensembles of seismic records, validation of structural simulators against large‐scale experiments, high computational cost for accurate fragility estimates. The effectiveness of the proposed framework is demonstrated for the Rio Torto Bridge, recently tested using hybrid simulation within the RETRO project.