Structural soil binary-medium constitutive model and factor of breakage ratio influence

LI Hong-ru; HU Zai-qiang; ZHAO Kai; ZHANG Long

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Structural soil binary-medium constitutive model and factor of breakage ratio influence

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- Structural soil binary-medium constitutive model and factor of breakage ratio influence
- Vol. 33, Issue S1, (2012)
- 作者机构：
  
  西安理工大学岩土工程研究所,西安,710048
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：21 September 2012，
  
  Published：2012
- 稿件说明：
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LI Hong-ru, HU Zai-qiang, ZHAO Kai, et al. Structural soil binary-medium constitutive model and factor of breakage ratio influence[J]. 2012, 33(S1).
DOI：

LI Hong-ru, HU Zai-qiang, ZHAO Kai, et al. Structural soil binary-medium constitutive model and factor of breakage ratio influence[J]. 2012, 33(S1). DOI：

摘要

岩土类材料是非均质的具有微缺陷的天然材料，岩土破损力学将岩土材料抽象成由结构块和结构带组成的非均质二元结构体。破损率演化方程反映了岩土材料在外部荷载作用下，结构块向结构带动态变化程度的过程。从细观尺度上分析结构性土体变形、破坏过程发展机制，揭示土体在荷载作用下结构块向结构带转化的过程。最后，针对杨陵黄土，通过三轴剪切试验，研究围压、含水率对破损率演化规律的影响。研究结果表明，单参数模型的破损率与围压和含水率没有关系，使从实验上证明参数模型的破损率是大主应变的函数。

Abstract

Geological materials are inhomogeneous natural materials having micro cracks and micro voids. Under the theoretical framework of breakage mechanics for geological material

the geomaterials are conceptualized as binary medium consisting of bonded blocks and bonded bands

evolvement equation of breakage ratio are reflectrd the fracture process degree of the transformation of fracturing or breaking of bonded blocks into bonded bands in the process of loading，which are analysed deformation and breakage development speciality

showed the change course of bonded blocks into bonded bands under loading. Finally

aimed at the loess in Yanglin region

through triaxial shear test

the influences of confining pressure and water content on the breakage rate evolution are studied. The results show that the breakage ratio of simple parameter binary-medium mode has no relation of the confining pressure and water content

it is the function of maximum principal strain from the test.

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Binary medium model for structured soils with initial stress-induced anisotropy

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Breakage mechanics for geomaterials: Breakage mechanism of structural blocks and binary-medium model

Experimental study on mechanical properties of artificially structured soils

Modeling compression of structured soils

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