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一个基于细观结构的粗粒料弹塑性本构模型

刘斯宏, 邵东琛, 沈超敏, 王子健

刘斯宏, 邵东琛, 沈超敏, 王子健. 一个基于细观结构的粗粒料弹塑性本构模型[J]. 岩土工程学报, 2017, 39(5): 777-783. DOI: 10.11779/CJGE201705001
引用本文: 刘斯宏, 邵东琛, 沈超敏, 王子健. 一个基于细观结构的粗粒料弹塑性本构模型[J]. 岩土工程学报, 2017, 39(5): 777-783. DOI: 10.11779/CJGE201705001
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LIU Si-hong, SHAO Dong-chen, SHEN Chao-min, WANG Zi-jian. Microstructure-based elastoplastic constitutive model for coarse-grained materials[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(5): 777-783. DOI: 10.11779/CJGE201705001
Citation: LIU Si-hong, SHAO Dong-chen, SHEN Chao-min, WANG Zi-jian. Microstructure-based elastoplastic constitutive model for coarse-grained materials[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(5): 777-783. DOI: 10.11779/CJGE201705001
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一个基于细观结构的粗粒料弹塑性本构模型  English Version

  • 1. 河海大学水利水电学院,江苏 南京 210098;
    2. 浙江省水利水电勘测设计院,浙江 杭州 310002

基金项目: 国家自然科学基金项目（51179059）; 中央高校基本科研业务费项目（2015B25014）
详细信息
    作者简介:

    刘斯宏(1964- ),男,教授,博士生导师,主要从事土石坝工程、粒状体力学及地基处理等方面的研究。E-mail: sihongliu@hhu.edu.cn。

  • 中图分类号: TU431

Microstructure-based elastoplastic constitutive model for coarse-grained materials

  • 1. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China;
    2. Zhejiang Design Institute of Water Conservancy and Hydroelectric Power, Hangzhou 310002, China

摘要

    摘要
  • 摘要: 针对粗粒料的剪胀特性和强度非线性,在经典弹塑性理论框架内,建立了一个基于细观结构的粗粒料弹塑性本构模型。模型采用基于颗粒材料细观结构变化推导得到的屈服函数,在此基础上由非相关联流动法则得到的剪胀方程,结合粗粒料典型的三轴压缩试验结果,引入一种无黏性土的压缩模式,构造了能够统一描述粗粒料剪胀、剪缩特性的硬化参数。阐述了由常规三轴试验和等向压缩试验确定模型全部7个参数的方法。对3种粗粒料三轴压缩试验结果进行了预测,预测结果与试验结果吻合良好,说明模型能够合理地反映粗粒料的应力变形特性。
    Abstract: Considering the nonlinear characteristics of dilatancy and strength of coarse-grained materials, an elastoplastic constitutive model based on microstructures is established within the framework of classic elastoplastic theory. In the model, a yield function derived from the microstructure of granular materials is adopted,and a stress-dilatancy relationship is developed from the yield function with the non-associated flow rule. Based on the typical trixial compression test results of coarse-grained materials, a hardening parameter is proposed by introducing a compression model for cohesionless soils, which can describe both the dilantancy and the contraction of coarse-grained materials. The proposed model has 7 parameters, which can be determined by the conventional trixial compression tests and the isotropic compression tests. The proposed model is calibrated by modeling the trixial compression tests on three rockfill materials. It is found that the calculated values are in good agreement with the experimental data, indicating that the proposed model can reflect the stress and deformation characteristics of coarse-grained materials reasonably.
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出版历程
  • 收稿日期:  2016-01-30
  • 发布日期:  2017-05-24

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