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基于微观破损规律的结构性土本构模型

蒋明镜, 刘静德, 孙渝刚

蒋明镜, 刘静德, 孙渝刚. 基于微观破损规律的结构性土本构模型[J]. 岩土工程学报, 2013, 35(6): 1134-1139.
引用本文: 蒋明镜, 刘静德, 孙渝刚. 基于微观破损规律的结构性土本构模型[J]. 岩土工程学报, 2013, 35(6): 1134-1139.
shu
JIANG Ming-jing, LIU Jing-de, SUN Yu-gang. Constitutive model for structured soils based on microscopic damage law[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(6): 1134-1139.
Citation: JIANG Ming-jing, LIU Jing-de, SUN Yu-gang. Constitutive model for structured soils based on microscopic damage law[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(6): 1134-1139.
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基于微观破损规律的结构性土本构模型  English Version

  • 1. 同济大学土木学院地下建筑与工程系，上海 200092; 2. 岩土及地下工程教育部重点实验室，上海 200092

基金项目: 国家杰出青年科学基金项目（51025932）；教育部博士点基金项目（20100072110048）；长江学者及创新团队发展计划资助项目（IRT1029）
详细信息
    作者简介:

    蒋明镜(1965- )，男，教授，博士生导师，主要从事天然结构性黏土、砂土、非饱和土、太空土和深海能源土宏微观试验、本构模型和数值分析研究。E-mail: mingjing.jiang@tongji.edu.cn。

  • 中图分类号: TU43

Constitutive model for structured soils based on microscopic damage law

  • 1. Departmant of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical & Underground Engineering, Ministry of Education, Shanghai 200092, China

摘要

    摘要
  • 摘要: 在岩土破损力学理论的基础上，通过考虑土体结构性破损的微观机理，建立了结构性土的本构模型。通过定义与重塑土屈服面几何相似的结构性屈服面，模型可以反映结构性对土体力学特性的影响；通过引入表征结构性损伤的破损参数，确定了结构性土加载过程中的硬化规律。该破损参数基于岩土破损力学中应力应变分担的概念而提出，具有明确的力学意义；模型的硬化规律同时考虑了塑性体应变及塑性主应变的影响，可以更好地反映土体结构性损伤过程。将该本构模型用于结构性土室内固结试验及三轴压缩试验结果的模拟，初步验证了该模型的合理性。
    Abstract: Based on the framework of breakage mechanics for geological materials, a constitutive model for structured soils is proposed considering the micro-mechanism of the destructuring effects. The influence of soil structure on the mechanical behaviors is considered by employing a structural yielding surface similar to that for reconstituted soils in geometry. A damage parameter modeling the soil structure damage is used in the hardening law for structured soils. The damage parameter proposed based on the concept of sharing of stress and strain in micro-scale has tangible mechanical denotation and the cooperation of plastic volumetric strain and principal axial strain is considered in the hardening law, thus this model can properly describe the transformation of soils from intact state to reconstituted state. The validity of the proposed model is verified by predicting the mechanical behaviors of natural and artificially cemented clays in the consolidation tests and triaxial compression tests.
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    • 参考文献(30)
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出版历程
  • 收稿日期:  2012-05-24
  • 发布日期:  2013-06-19

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