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Cao Z L，Tao X X，Tao Z R，Wang K Y. 2022. Research on bandwidth of ground motion simulated using FK approach. Acta Seismologica Sinica，44（1）：145−157. DOI: 10.11939/jass.20210093
Citation: Cao Z L，Tao X X，Tao Z R，Wang K Y. 2022. Research on bandwidth of ground motion simulated using FK approach. Acta Seismologica Sinica，44（1）：145−157. DOI: 10.11939/jass.20210093
shu

Research on bandwidth of ground motion simulated using FK approach

  • 1.

    School of Civil Engineering，Hebei University of Engineering，Hebei Handan 056038，China

  • 2.

    School of Civil Engineering，Harbin Institute of Technology，Harbin 150090，China

  • 3.

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

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  • Received Date: May 30, 2021
  • Revised Date: August 26, 2021
  • Available Online: January 26, 2022
  • Published Date: March 17, 2022
    Graphical Abstract
    • Abstract
  • The application prospect of ground motion simulation approach is closely related to the effective bandwidth of synthetics. Hence we studied the simulation approach based on the frequency-wavenumber Green’s function （FK approach）, and analyzed the key factors affecting the bandwidth and the treatment measures. On the basis of the calculation principle introduction, we summarized the main factors influencing the ground motion simulated by FK approach, and analyzed the influences of the crustal velocity model on sub-source seismic moment, rupture time and propagation time. Then, we analyzed the ability of the Green’s function to propagate broadband seismic waves, and put forward the recommended values of parameters affecting bandwidth in the calculation of Green’s function. The source time function and the rise time controlling the sub-source slip process are investigated to analyze the ability of source model in FK approach to radiate broadband seismic waves. The results show that the FK approach has the ability to simulate broadband ground motion, and this requires reasonable parameters and models.
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    • References (31)
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