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Enhanced endurance-time-method (EETM) for efficient seismic fragility, risk and resilience assessment of structures
https://orcid.org/0000-0002-4168-4328
Abstract Quantifying the seismic fragility, risk, and resilience of structures is a computationally demanding step in the performance-based earthquake engineering framework as it commonly requires a large number of nonlinear dynamic analyses. The Endurance Time Method (ETM), which leverages just a small number of intensifying dynamic loads to obtain full responses of structures from elastic to collapse, has been increasingly used recently for efficient estimates of seismic responses. However, when applied to fragility analyses, ETM may produce imprecise fragility medians and under-estimated dispersions in fragility curves, which thereby results in biased estimates of risk and resilience. To solve this problem, the present study develops an Enhanced ETM (EETM) specialized for accurate and efficient seismic fragility analyses, which further boost accurate and efficient assessment of structural risk and resilience. The developed method is demonstrated using a computationally intensive deep water-bridge model under earthquakes considering the fluid-structure interaction. Merits of EETM on efficiency and accuracy are demonstrated by comparison with ETM and Incremental Dynamic Analysis (IDA) method.
Highlights An Enhanced Endurance-Time-Method (EETM) for fragility analysis is developed. EETM leverage the variability of ground motion set to preliminarily rectify the fragility dispersion. EETM involves an iterative process to further rectify fragility median and dispersion. EETM provides accurate and efficient estimates of structural seismic risk and resilience. EETM is demonstrated by a deep-water bridge considering fluid-structure interaction.
Enhanced endurance-time-method (EETM) for efficient seismic fragility, risk and resilience assessment of structures
https://orcid.org/0000-0002-4168-4328
Abstract Quantifying the seismic fragility, risk, and resilience of structures is a computationally demanding step in the performance-based earthquake engineering framework as it commonly requires a large number of nonlinear dynamic analyses. The Endurance Time Method (ETM), which leverages just a small number of intensifying dynamic loads to obtain full responses of structures from elastic to collapse, has been increasingly used recently for efficient estimates of seismic responses. However, when applied to fragility analyses, ETM may produce imprecise fragility medians and under-estimated dispersions in fragility curves, which thereby results in biased estimates of risk and resilience. To solve this problem, the present study develops an Enhanced ETM (EETM) specialized for accurate and efficient seismic fragility analyses, which further boost accurate and efficient assessment of structural risk and resilience. The developed method is demonstrated using a computationally intensive deep water-bridge model under earthquakes considering the fluid-structure interaction. Merits of EETM on efficiency and accuracy are demonstrated by comparison with ETM and Incremental Dynamic Analysis (IDA) method.
Highlights An Enhanced Endurance-Time-Method (EETM) for fragility analysis is developed. EETM leverage the variability of ground motion set to preliminarily rectify the fragility dispersion. EETM involves an iterative process to further rectify fragility median and dispersion. EETM provides accurate and efficient estimates of structural seismic risk and resilience. EETM is demonstrated by a deep-water bridge considering fluid-structure interaction.
Enhanced endurance-time-method (EETM) for efficient seismic fragility, risk and resilience assessment of structures
https://orcid.org/0000-0002-4168-4328
Abstract Quantifying the seismic fragility, risk, and resilience of structures is a computationally demanding step in the performance-based earthquake engineering framework as it commonly requires a large number of nonlinear dynamic analyses. The Endurance Time Method (ETM), which leverages just a small number of intensifying dynamic loads to obtain full responses of structures from elastic to collapse, has been increasingly used recently for efficient estimates of seismic responses. However, when applied to fragility analyses, ETM may produce imprecise fragility medians and under-estimated dispersions in fragility curves, which thereby results in biased estimates of risk and resilience. To solve this problem, the present study develops an Enhanced ETM (EETM) specialized for accurate and efficient seismic fragility analyses, which further boost accurate and efficient assessment of structural risk and resilience. The developed method is demonstrated using a computationally intensive deep water-bridge model under earthquakes considering the fluid-structure interaction. Merits of EETM on efficiency and accuracy are demonstrated by comparison with ETM and Incremental Dynamic Analysis (IDA) method.
Highlights An Enhanced Endurance-Time-Method (EETM) for fragility analysis is developed. EETM leverage the variability of ground motion set to preliminarily rectify the fragility dispersion. EETM involves an iterative process to further rectify fragility median and dispersion. EETM provides accurate and efficient estimates of structural seismic risk and resilience. EETM is demonstrated by a deep-water bridge considering fluid-structure interaction.
Enhanced endurance-time-method (EETM) for efficient seismic fragility, risk and resilience assessment of structures
Pang, Yutao (Autor:in) / Wang, Xiaowei (Autor:in)
15.03.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
A Simplified Approach of Analytical Seismic Fragility Analysis Using the Endurance Time Method
| Taylor & Francis Verlag | 2024