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Seismic fragility analysis based on artificial ground motions and surrogate modeling of validated structural simulators

机译:基于人工地面运动的地震脆弱性分析及验证结构模拟器的替代建模

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摘要

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.
机译:本研究介绍了基于人工地面运动建模,基于多项式混沌的全局敏感性分析和分层Kriging代理建模的高效和准确地震脆性分析的计算框架。 该框架遵循基于性能的地震工程对等方法的哲学,其中脆弱性分析与危险分析解耦。 本研究解决了目前实践中存在的三种临界性。 即,减少危险尺寸的地震记录尺寸的尺寸特定尺寸,结构模拟器对大规模实验的验证,高计算成本,准确脆弱估计。 拟议框架的有效性用于RIO Torto Bridge,最近在复古项目中使用混合模拟测试。

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