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Volume 45 Issue 2
Mar.  2023
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Article Navigation >  Acta Seismologica Sinica  > 2023  >  45(2): 356-372
Zhao X F，Wen Z P，Xie J J，Xie Q C. 2023. Applicability of the Next Generation Attenuation-West2 ground-motion models to the components of near-fault velocity pulse-like ground motions. Acta Seismologica Sinica，45（2）：356−372 doi: 10.11939/jass.20210176
Citation: Zhao X F，Wen Z P，Xie J J，Xie Q C. 2023. Applicability of the Next Generation Attenuation-West2 ground-motion models to the components of near-fault velocity pulse-like ground motions. Acta Seismologica Sinica，45（2）：356−372 doi: 10.11939/jass.20210176
shu

Applicability of the Next Generation Attenuation-West2 ground-motion models to the components of near-fault velocity pulse-like ground motions

doi: 10.11939/jass.20210176
  • 1.

    Institute of Geophysics，China Earthquake Administration，Beijing 100081，China

  • 2.

    Institute of Engineering Mechanics，China Earthquake Administration，Harbin 150080，China

  • Received Date: 2021-11-18
  • Rev Recd Date: 2022-02-14
    • Available Online: 2022-02-19
  • Publish Date: 2023-03-15
    Abstract
  • The traditional ground-motion models （GMMs） do not account for pulse effects and may therefore fail to estimate seismic hazards and risk at near-fault sites, where pulse-like ground motions are expected. Thus, the applicability of the NGA-West2 GMMs to the near-fault velocity pulse-like ground motions need to be tested. The near-fault strong ground motions are quantitatively identified from recent earthquakes since 2013 by using wavelet method and taking the uncertainty of pulse orientation into consideration so as to form a new pulse database. Based on the new pulse database, long-period pulses are extracted from the original pulse records by using wavelet method. Based on a quantitative analysis of the epsilon parameter, we quantitatively test the applicability of the NGA-West2 ground-motion model to the near-fault velocity pulse-like ground motions. The results show that the four NGA-West2 models are more suitable for describing the residual recordings in the studied period, but underestimate the original pulse-like ground motions especially around the pulse period. We noted that, among the four NGA-West2 models, the applicability of the CB2018 to the residual ground motions is the best. This study provides an excellent opportunity to quantitatively evaluate the NGA-West2 GMMs and to update these models in the near future, and also provides a basis for incorporating pulse effects into near-fault probabilistic seismic hazard analysis and seismic design.

     

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