Indirect boundary element method solution to the seismic ground motion of near-fault sedimentary valley

Liu, Zhongxian; Liu, Ying; Huang, Lei; Li, Yurun; Zhao, Ran

doi:10.1016/j.enganabound.2021.07.016

Cited by 7 publications

(4 citation statements)

References 36 publications

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“…and 19 illustrate the spatial distribution of the means and COVs of PGAs and PGVs in a mountainvalley site under different fault dip angles. The horizontal and vertical PGA and PGV means at any position decrease as the fault dip angle increases, which is consistent with previous research[41]. For example, in Case 1, for a dip angle of 30°, the maximum mean value of vertical PGA reaches 0.96 g, while the maximum mean value of PGA in the same direction under a 60° dip angle condition is only 0.47 g. Similar situations also occur in PGVs.…”

supporting

confidence: 90%

“…in Case 1, the variability of vertical PGAs is higher than other conditions; however, the spatial distribution of COVs is regular. This situation has been analyzed in detail in our previous study [41].…”

Section: Pga and Pgv Distributionmentioning

confidence: 96%

“…The scattered wave field is the total wave field of the local site; Green's functions of the displacement and stress of the source line in the whole space of the bedrock half-space and the boundary elements of the sedimentary valley. The detailed information can be obtained in the literature [41]. By solving Eqs.…”

Section: Seismic Wave Scattering Solution By Mountain-valley Sitesmentioning

confidence: 99%

“…( 17)-( 19), a system of linear equations can be derived. Due to space limitations, the detailed expansion of the equations is not be presented in this study, which can be referred to [41].…”

Section: Seismic Wave Scattering Solution By Mountain-valley Sitesmentioning

confidence: 99%

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Parametric uncertainty propagation of kinematic source models in ground motions at near-fault mountain-valley areas

Meng

Liu

et al. 2023

Preprint

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The source uncertainty causes spatial variability of ground motions in mountain-valley sites near the fault. This study aims to analyze how the uncertainty propagation in the source model affects the near-fault and local site effect when there is a mountain-valley site in the near-fault area. This study considers the uncertainty of the asperity intensity and rupture velocity by random variables, and considers the randomness of the position of the asperity and the initial rupture point by setting three rupture scenarios. The impact of the local site on the variability of ground motions is compared, and the correlation between the variability of ground motion and the fault distance and dip angle is discussed. To solve multi-dimensional uncertainty problems, the multiplicative dimensional reduction method (M-DRM) with high accuracy and efficiency is employed, and the physical process of fault rupture to site response is simulated by the indirect boundary element method (IBEM). The results indicate that M-DRM is applicable to solving ground motions in near-fault complex sites with uncertain parameters. The uncertainty is transmitted with the propagation of seismic waves, and the scattering of seismic waves in mountain-valley sites amplifies this uncertainty. The local site effect increases the frequency band ranges and peak values of velocity pulses, and the uncertainty only affects the values of the velocity pulses. Considering the mean plus once the variance caused by the uncertainty, the maximum value of vertical velocity pulse can be increased by 34%. The variability of ground motion parameters decreases with the increase of fault distance and dip angle. It is necessary to quantify the uncertainty of the sources in ground motion simulation based on physical models.

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supporting

confidence: 90%

Section: Pga and Pgv Distributionmentioning

confidence: 96%

Section: Seismic Wave Scattering Solution By Mountain-valley Sitesmentioning

confidence: 99%

Section: Seismic Wave Scattering Solution By Mountain-valley Sitesmentioning

confidence: 99%

See 2 more Smart Citations

Parametric uncertainty propagation of kinematic source models in ground motions at near-fault mountain-valley areas

Meng

Liu

et al. 2023

Preprint

Self Cite

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show abstract

Amplification of Ground Vibration on a Rocky Hill and Its Environs Under Cylindrical SH Waves

Zhu,

Xu,

et al. 2024

Rock Mech Rock Eng

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2-D FM-IBEM Simulation of broadband ground motions on near-fault mountain-valley coupling site

Liu

Zhou

Meng

et al. 2022

Engineering Analysis with Boundary Elements

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Indirect boundary element method solution to the seismic ground motion of near-fault sedimentary valley

Cited by 7 publications

References 36 publications

Parametric uncertainty propagation of kinematic source models in ground motions at near-fault mountain-valley areas

Parametric uncertainty propagation of kinematic source models in ground motions at near-fault mountain-valley areas

Amplification of Ground Vibration on a Rocky Hill and Its Environs Under Cylindrical SH Waves

2-D FM-IBEM Simulation of broadband ground motions on near-fault mountain-valley coupling site

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