Numerical modeling of seismic response of desaturated sandy soils

被引：0

作者：

Li P. ^{[1
,2
]}

Lai J.-Y. ^{[1
,2
]}

Chen Y.-M. ^{[1
,2
]}

He S.-K. ^{[1
,2
]}

机构：

[1] Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing

[2] Institute of Engineering Safety and Disaster Prevention, Hohai University, Nanjing

来源：

Journal of Computational and Theoretical Nanoscience | 2016年 / 13卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Desaturation; Mitigation of liquefaction; Numerical simulation; Seismic response;

D O I：

10.1166/jctn.2016.4601

中图分类号：

学科分类号：

摘要：

Desaturation is a process of decreasing the saturation degree of the full saturated soils. Comparing with saturated soils, desaturated sandy soils have stronger resistance on seismic liquefaction. In this paper, a numerical model for describing the characteristics of desaturated sandy soils was proposed in the FLAC3D framework. The bulk modulus of the pore water in the desaturated sand was numerically verified with the theoretical formulation. The shaking table tests on the mitigation of liquefaction of desaturated sand were simulated by the proposed numerical model. The results show that low bulk modulus of the pore water in the desaturated sand is the main factor for the strong resistance of liquefaction. Two different layouts of electrodes were considered in the simulation of shaking table test. The results show that there is larger area of the excess pore pressure in the case of horizontal electrodes than that in the case of vertical electrodes. The numerical results agree well with the shaking table tests. © Copyright 2016 American Scientific Publishers All rights reserved.

引用

页码：2449 / 2454

页数：5

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