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Zhao X F，Wen Z P，Xie J J，Xie Q C. 2022. Applicability of the Next Generation Attenuation-West2 ground-motion model to the components of near-fault velocity pulse-like ground motions. Acta Seismologica Sinica，44（0）：1−10 doi: 10.11939/jass.20210176
Citation: Zhao X F，Wen Z P，Xie J J，Xie Q C. 2022. Applicability of the Next Generation Attenuation-West2 ground-motion model to the components of near-fault velocity pulse-like ground motions. Acta Seismologica Sinica，44（0）：1−10 doi: 10.11939/jass.20210176
shu

Applicability of the Next Generation Attenuation-West2 ground-motion model 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
    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 newest generation 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 by considering the uncertainty of pulse orientation and using wavelet method from recent earthquake since 2013 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 at the studied period, but underestimate the pulse original ground motions especially around the pulse period. We noted that, during 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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