Numerical calculation method of saturated ground liquefaction based on solid-liquid two-phase coupling material point method

被引：0
|
作者：
Feng, Xiaoqing [1 ]
Ye, Bin [1 ]
Miao, Husheng [1 ]
Lin, Chuangji [1 ]
机构：
[1] College of Civil Engineering, Tongji University, Shanghai
来源：
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | 2024年 / 56卷 / 11期
关键词：
material point method; numerical calculation method; saturated foundation; soil liquefaction; solid-liquid coupling;
D O I：
10.11918/202305037
中图分类号：
学科分类号：
摘要：
In order to study the liquefaction of saturated foundation under dynamic conditions, a three-dimensional explicit material point method program MapleLeaf is developed by the interaction for the solid-liquid two-phase medium in this paper. Firstly, based on porous media theory, a single-point scheme is used to describe the solid-liquid two-phase medium. The formula of solid-liquid two-phase in the u-p scheme is derived. Secondly, the reliability of the numerical calculation under the solid-liquid two-phase static condition is verified by comparing the numerical results of the three-dimensional model of hydrostatic pressure column and the theoretical model of Terzaghi′s one-dimensional consolidation. Then, a dynamic algorithm module is added. And the Cyclic Mobility constitutive model for analyzing dynamic liquefaction is introduced into the program. Finally, based on saturated foundation model prepared from the existing literature and the shaking table system in the field, the three-dimensional numerical model is established. By comparing the numerical solution of the material point numerical model with the experimental results, the accuracy of the program in analyzing the liquefaction problem of saturated foundations under dynamic conditions is verified. The results show that the solid-liquid two-phase coupling numerical calculation method based on the material point method can better reflect the basic law of the growth and dissipation of excess pore water pressure before and after liquefaction of saturated foundation under dynamic conditions. The material point method program developed in this paper can accurately analyze the liquefaction of saturated foundation under dynamic conditions. © 2024 Harbin Institute of Technology. All rights reserved.
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页码：15 / 25
页数：10
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