Reliability Analysis of Soil Liquefaction Considering Spatial Variability of Soil Property

IF 2.1 4区工程技术 Q2 GEOCHEMISTRY & GEOPHYSICS

Journal of Earthquake and Tsunami Pub Date : 2021-08-18 DOI:10.1142/s1793431122500026

Yubing Wang, Shuang Shu, Wu Yongxin

引用次数: 3

Abstract

The objective of this study was to investigate the liquefaction response of soil using the spatial variability of the shear modulus by considering different values of the coefficient of variation (COV) and the horizontal scale of fluctuation (SOF). For this purpose, a Monte Carlo simulation, combining the digital generation of a non-Gaussian random field with finite difference analyses, was utilized. Parametric studies were performed from the perspectives of the liquefaction area, excess pore water pressure (EPWP), and displacement at the ground surface. We found that a larger COV of the soil shear modulus was correlated with a slower reduction of liquefaction area and a lower EPWP ratio. To explain the influence from the perspective of the spatial distribution characteristics of the shear modulus, a deterministic model test was carried out. Additionally, it was found that the displacement history and the differential settlement at the end of shaking were regularly affected by the COV and the horizontal SOF, especially for large COV and horizontal SOF.

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考虑土壤性质空间变异性的土壤液化可靠性分析

考虑不同的变异系数(COV)和水平波动尺度(SOF)，利用剪切模量的空间变异性研究土壤的液化响应。为此，利用蒙特卡罗模拟，结合非高斯随机场的数字生成和有限差分分析。从液化面积、超孔隙水压力(EPWP)和地表位移角度进行参数化研究。研究发现，土体剪切模量COV越大，液化面积减小越慢，EPWP比越低。为了从剪切模量空间分布特征的角度解释其影响，进行了确定性模型试验。此外，研究发现，振动结束时的位移历史和微分沉降受冠状病毒和水平柔度的规律影响，特别是对于大冠状病毒和水平柔度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Earthquake and Tsunami 地学-地球化学与地球物理

CiteScore

2.60

自引率

13.30%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Earthquake and Tsunami provides a common forum for scientists and engineers working in the areas of earthquakes and tsunamis to communicate and interact with one another and thereby enhance the opportunities for such cross-fertilization of ideas. The Journal publishes original papers pertaining to state-of-the-art research and development in Geological and Seismological Setting; Ground Motion, Site and Building Response; Tsunami Generation, Propagation, Damage and Mitigation, as well as Education and Risk Management following an earthquake or a tsunami. We welcome papers in the following categories: Geological and Seismological Aspects Tectonics: (Geology - earth processes) Fault processes and earthquake generation: seismology (earthquake processes) Earthquake wave propagation: geophysics Remote sensing Earthquake Engineering Geotechnical hazards and response Effects on buildings and structures Risk analysis and management Retrofitting and remediation Education and awareness Material Behaviour Soil Reinforced concrete Steel Tsunamis Tsunamigenic sources Tsunami propagation: Physical oceanography Run-up and damage: wave hydraulics.