2008
DOI: 10.1186/bf03353121
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Variation process in stiffness inferred by nonlinear inversion during mainshocks at Kushiro Port vertical array site

Abstract: In the present study, a set of three strong motions accompanied by 21 before and after mainshock motions from liquefied soil at the Kushiro Port vertical array site have been obtained. S-wave velocity variation is estimated using a new proposed nonlinear GA inversion technique. This inversion technique is reproductive in assessment for S-wave velocities due to its direct link with the simulation FEM program and matching technique between the observed and simulated waveforms. Layers (6 ∼ 23 m depth) have been f… Show more

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Cited by 8 publications
(3 citation statements)
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References 9 publications
(7 reference statements)
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“…First, only earthquakes with PGAs (i.e. Peak Ground Accelerations) of ≤ 10 cm/s 2 are used in the present study to characterize the linear response at each seismic station and avoid later modification due to nonlinear response (Thabet 2008a(Thabet , b, 2021. Figure 10 is showing correlations between surface and borehole PGAs using KiK-net stations.…”
Section: Methodsmentioning
confidence: 99%
“…First, only earthquakes with PGAs (i.e. Peak Ground Accelerations) of ≤ 10 cm/s 2 are used in the present study to characterize the linear response at each seismic station and avoid later modification due to nonlinear response (Thabet 2008a(Thabet , b, 2021. Figure 10 is showing correlations between surface and borehole PGAs using KiK-net stations.…”
Section: Methodsmentioning
confidence: 99%
“…Liquefaction can occur at any depth if the hydrodynamic conditions (also caused by earthquakes) are such that the pore water pressure exceeds the vertical load. Thabet et al (2008) found that soil layers 6 ∼ 23 m deep were responsible for liquefaction in the Kushiro Port area. Naik et al (2020) found that stratified soils with a liquefaction probability of between 2 and 20 were prone to liquefaction from their detailed analysis of the widespread liquefaction reported around the Heunghae basin, the first reported liquefaction case in Korea's modern seismic history, during the 2017 Mw 5.4 Pohang earthquake.…”
Section: Figure 2 Soil Liquefaction Mechanismmentioning
confidence: 98%
“…First, only earthquakes with PGAs (i.e. Peak Ground Accelerations) of ≤ 10 cm/s 2 are used in the present study to characterize the linear response at each seismic station and avoid later modi cation due to nonlinear response (Thabet 2008(Thabet , 2021a. Figure S6 is showing correlations between surface and borehole PGAs using KiK-net stations.…”
Section: Datamentioning
confidence: 99%