Study on mechanism of micro-failure of structured soils

LI Jian-hong; SHEN Zhu-jiang

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Study on mechanism of micro-failure of structured soils

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- Study on mechanism of micro-failure of structured soils
- Vol. 28, Issue 8, (2007)
- 作者机构：
  
  清华大学水利水电工程系/水沙科学与水利水电工程国家重点实验室,北京,100084
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：15 October 2013，
  
  Published：2007
- 稿件说明：
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LI Jian-hong, SHEN Zhu-jiang. Study on mechanism of micro-failure of structured soils[J]. 2007, 28(8).
DOI：

LI Jian-hong, SHEN Zhu-jiang. Study on mechanism of micro-failure of structured soils[J]. 2007, 28(8). DOI：

摘要

在前人研究的基础上，针对凸多面体相互接触的性质，推导了三维状态下的微观接触力和宏观应力的关系，并应用于结构性土的研究中。对结构性土，采用以土颗粒之间的胶结和组构为基本研究对象的研究方法，在二元介质理论框架内推导出结构性土破损规律及迭代公式，提出3种破损方式（剪碎、压碎、混合型），同时推导了宏观的柔度张量；对各向同性的结构性土，在球应力加载条件下的破损规律以及变形规律进行了研究，得到了解析解，简单分析的结果与实际相符。

Abstract

Based on previous study

the authors deduced the three-dimensional relationship between micro-contact force and the macro-stress on convex polyhedron. Meanwhile the authors proposed the way dealt with the structured soils through investigating the properties of soil fabric and bonding between soil granulae. Following the conception of binary medium of structured soils presented by SHEN Zhu-jiang

this paper presents three models of failure of bonding under macro-stress and provides the equation for iterative calculation to derive the macro-compliance tensor. As an example

the structured soil behavior with the isotropic bonding and isotropic fabric under the isotropic loading has been studied and the closed-form solution of the failure development and the stress relationship has been derived. The investigations show that the failure of structured soils is caused by both of micro-shearing and micro-tension

which is corresponding with the real experimental study.

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