Yanni, H., Fragiadakis, M. and Mitseas, I.P. orcid.org/0000-0001-5219-1804 (2024) Probabilistic generation of hazard‐consistent suites of fully non‐stationary seismic records. Earthquake Engineering & Structural Dynamics, 53 (10). pp. 3140-3164. ISSN 0098-8847
Abstract
A novel, practical, and computationally efficient probabilistic methodology for the stochastic generation of suites of fully non-stationary artificial accelerograms is presented. The proposed methodology ensures that the produced ground motion suites match a given target spectral mean and target variability for the whole period range of interest. This is achieved by first producing an ensemble of random target spectra with the given mean and variability and then using them to generate artificial, target spectrum-compatible, acceleration time-histories with spectral representation techniques. Spectral correlation can also be assumed for the generated ground motion spectra. Based on the same backbone, two different formulations are proposed for generating spectrum-compatible acceleration time-histories of the non-stationary kind. The distinction between these two variants lies in the techniques employed for modeling the temporal and spectral modulation, focusing on the site-compatibility of the produced records. The first approach uses past-recorded seismic accelerograms as seed records, and the second proposes and uses a new, probabilistic time-frequency modulating function. The outcome of the proposed methodology is suites containing site-compatible ground motion time-histories whose spectral mean and variability match those obtained from any of the usually employed target spectra used in the earthquake engineering practice. An online tool implementing the proposed methodology is also freely provided.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Author(s). Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
Keywords: | artificial accelerograms; ground motion model; non-stationary; spectrum-compatible; stochastic process; variability |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 05 Sep 2024 15:22 |
Last Modified: | 05 Sep 2024 15:22 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/eqe.4153 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:216700 |