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An energy-frequency parameter for earthquake ground motion intensity measure

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Authors

  • Guan Chen
  • Jiashu Yang
  • Yong Liu
  • Takeshi Kitahara
  • Michael Beer

Research Organisations

External Research Organisations

  • Wuhan University
  • Kanto Gakuin University
  • University of Liverpool
  • Tongji University
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Details

Original languageEnglish
Pages (from-to)271-284
Number of pages14
JournalEarthquake Engineering and Structural Dynamics
Volume52
Issue number2
Publication statusPublished - 10 Jan 2023

Abstract

A novel scalar ground motion intensity measure (IM), termed the energy-frequency parameter, is proposed based on the Hilbert-Huang transform. To validate the effectiveness of the proposed IM, the correlation analysis between the engineering demand parameter (EDP) and energy-frequency parameter is performed using 1992 recorded ground motions, in which EDP is the maximum inter-storey drift of structures obtained by nonlinear time-history analysis. Results show that the energy-frequency parameter has a strong linear correlation with EDP at natural logarithm, and this correlation is applicable for various structural fundamental periods. We also verified that the lognormal cumulative distribution function can characterize the energy-frequency parameter-based fragility function, which can further facilitate the application of the parameter in seismic risk analysis. Besides, the strong correlation between the energy-frequency parameter and other IMs (such as PGA, PGV, PGD, CAV, (Formula presented.), (Formula presented.), and SI) potentially makes the proposed IM widely applicable in seismic risk analysis. Moreover, since the energy-frequency parameter depends only on the frequency-domain characteristics of the ground-motion signal, it may closely link to seismological theory and provide new insights into seismology engineering.

Keywords

    energy-frequency, fragility function, ground motion IM, Hilbert-Huang transform, seismic risk analysis

ASJC Scopus subject areas

Cite this

An energy-frequency parameter for earthquake ground motion intensity measure. / Chen, Guan; Yang, Jiashu; Liu, Yong et al.
In: Earthquake Engineering and Structural Dynamics, Vol. 52, No. 2, 10.01.2023, p. 271-284.

Research output: Contribution to journalArticleResearchpeer review

Chen G, Yang J, Liu Y, Kitahara T, Beer M. An energy-frequency parameter for earthquake ground motion intensity measure. Earthquake Engineering and Structural Dynamics. 2023 Jan 10;52(2):271-284. doi: 10.1002/eqe.3752
Chen, Guan ; Yang, Jiashu ; Liu, Yong et al. / An energy-frequency parameter for earthquake ground motion intensity measure. In: Earthquake Engineering and Structural Dynamics. 2023 ; Vol. 52, No. 2. pp. 271-284.
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abstract = "A novel scalar ground motion intensity measure (IM), termed the energy-frequency parameter, is proposed based on the Hilbert-Huang transform. To validate the effectiveness of the proposed IM, the correlation analysis between the engineering demand parameter (EDP) and energy-frequency parameter is performed using 1992 recorded ground motions, in which EDP is the maximum inter-storey drift of structures obtained by nonlinear time-history analysis. Results show that the energy-frequency parameter has a strong linear correlation with EDP at natural logarithm, and this correlation is applicable for various structural fundamental periods. We also verified that the lognormal cumulative distribution function can characterize the energy-frequency parameter-based fragility function, which can further facilitate the application of the parameter in seismic risk analysis. Besides, the strong correlation between the energy-frequency parameter and other IMs (such as PGA, PGV, PGD, CAV, (Formula presented.), (Formula presented.), and SI) potentially makes the proposed IM widely applicable in seismic risk analysis. Moreover, since the energy-frequency parameter depends only on the frequency-domain characteristics of the ground-motion signal, it may closely link to seismological theory and provide new insights into seismology engineering.",
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T1 - An energy-frequency parameter for earthquake ground motion intensity measure

AU - Chen, Guan

AU - Yang, Jiashu

AU - Liu, Yong

AU - Kitahara, Takeshi

AU - Beer, Michael

N1 - Funding Information: This research is supported by the International Joint Research Platform Seed Fund Program of Wuhan University (Grant No. WHUZZJJ202207) and National Natural Science Foundation of China (Grant No. 52079099). Guan Chen would like to thank the financial support of Sino‐German (CSC‐DAAD) Postdoc Scholarship Program.

PY - 2023/1/10

Y1 - 2023/1/10

N2 - A novel scalar ground motion intensity measure (IM), termed the energy-frequency parameter, is proposed based on the Hilbert-Huang transform. To validate the effectiveness of the proposed IM, the correlation analysis between the engineering demand parameter (EDP) and energy-frequency parameter is performed using 1992 recorded ground motions, in which EDP is the maximum inter-storey drift of structures obtained by nonlinear time-history analysis. Results show that the energy-frequency parameter has a strong linear correlation with EDP at natural logarithm, and this correlation is applicable for various structural fundamental periods. We also verified that the lognormal cumulative distribution function can characterize the energy-frequency parameter-based fragility function, which can further facilitate the application of the parameter in seismic risk analysis. Besides, the strong correlation between the energy-frequency parameter and other IMs (such as PGA, PGV, PGD, CAV, (Formula presented.), (Formula presented.), and SI) potentially makes the proposed IM widely applicable in seismic risk analysis. Moreover, since the energy-frequency parameter depends only on the frequency-domain characteristics of the ground-motion signal, it may closely link to seismological theory and provide new insights into seismology engineering.

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