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基于粘塑性算法和Mohr-Coulomb准则的基坑工程三维有限元数值分析

发表时间:2009-01-31  浏览量:1945  下载量:799
全部作者: 牛燕宁,梁收运,宋术双,霍张丽
作者单位: 兰州大学土木工程与力学学院;兰州大学土木工程与力学学院
摘 要: 引入国外应用较为广泛的粘塑性法,结合Mohr-Coulomb屈服准则开发了可模拟基坑开挖过程的非线性有限元程序。分析了程序研制过程中的变体系力学效应、粘塑性法的程序应用、Mohr-Coulomb模型破坏面和塑性势面上拐点的处理等问题,验证了程序的正确性。采用强度参数折减法对边坡稳定性作了算例分析,与BISHOP和MORGENSTERN运用分片圆弧技术得到的结果吻合较好。
关 键 词: 基坑工程;粘塑性法;Mohr-Coulomb准则;有限元分析
Title: 3D FEM numerical analysis of geotechnical engineering based on Visco-Plasticity method and Mohr-Coulomb criterion
Author: NIU Yanning, LIANG Shouyun, SONG Shushuang, HUO Zhangli
Organization: School of Civil Engineering and Mechanics, Lanzhou University; School of Civil Engineering and Mechanics, Lanzhou University
Abstract: This paper introduced a Visco-Plasticity method widely used overseas. Based on finite element method and Mohr-Coulomb criterion, it developed a procedure which could simulate the excavation process by nonlinear finite element analysis. Some problems were resolved in the research process including the effected analysis of variable system mechanics, the application of Visco-Plasticity method and the disposal of inflexion between destroyed plane and plastic potential surface of Mohr-coulomb model. The procedure was confirmed to be accurate. The paper used the reduced parameter method to analyze the slope stability, and the results were matched well with the BISHOP and MORGENSTERN by the slabbing arc method.
Key words: foundation pit; Visco-Plasticity method; Mohr-Coulomb criterion; finite element analysis
发表期数: 2009年1月第2期
引用格式: 牛燕宁,梁收运,宋术双,等. 基于粘塑性算法和Mohr-Coulomb准则的基坑工程三维有限元数值分析[J]. 中国科技论文在线精品论文,2009,2(2):212-217.
 
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