Three-dimensional non-coaxial constitutive model for sand and its application in bearing capacity of foundation

被引：0
作者：
Wang X. [1 ]
Kong L. [2 ]
Li X.-F. [3 ]
机构：
[1] School of Civil Engineering, Qingdao Technological University, Qingdao
[2] School of Sciences, Qingdao Technological University, Qingdao
[3] Solid Mechanics Institute, Ningxia University, Yinchuan
来源：
Kong, Liang (qdkongliang@163.com) | 1600年 / Chinese Society of Civil Engineering卷 / 42期
关键词：
Bearing capacity of foundation; Non-coaxiality; Sand; Simple shear test;
D O I：
10.11779/CJGE202005011
中图分类号：
学科分类号：
摘要：
Due to the coaxial assumption that the direction of plastic strain rate is the same as that of stress, the non-coaxial behavior of sand under non-proportional loading conditions can not be captured by the conventional elastic-plastic model. In this study, firstly the cause of coaxial hypothesis contained in the traditional model is analyzed. Then, a non-coaxial model for sand is constructed by introducing the generalized non-coaxial plastic flow theory developed by Hashiguchi et al into the state-dependent dilatancy model for sand established by Li et al. The simulation of simple shear tests on Leighton-Buzzard sand shows that the non-coaxial model can describe the experimental results more reasonably. The corresponding finite element program is developed, the bearing capacity of sand foundation under different void ratios is analyzed by using the proposed model. The influence of non-coaxial parameters on the calculation results is discussed, and the predicted results demonstrate similar characteristics with those of simple shear test simulation on the whole. © 2020, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.
引用
收藏
页码：892 / 899
页数：7
相关论文
共 32 条
  • [1] ZHENG Ying-ren, KONG Liang, Geotechnical Plastic Mechanics, (2010)
  • [2] ARTHUR J R F, RODRIGUEZ DEL C J I, DUNSTAN T., Principal stress rotation: a missing parameter, Journal of the Geotechnical Engineering Division, 106, 4, pp. 419-433, (1980)
  • [3] ROSCOE K H., The influence of strains in soil mechanics, Géotechnique, 20, 2, pp. 129-170, (1970)
  • [4] ODA M, KONISHI J., Microscopic deformation mechanism of granular material in simple shear, Soils and Foundations, 14, 4, pp. 25-38, (1974)
  • [5] MIURA K, MIURA S, TOKI S., Deformation behaviour of sand under principal axes rotation, Soils and Foundations, 26, 1, pp. 36-52, (1986)
  • [6] ISHIHARA K, TOWHATA I., Sand response to cyclic rotation of principal stress direction as induced by wave loads, Soils and Foundations, 23, pp. 11-16, (1983)
  • [7] GUTIERREZ M, ISHIHARA K, TOWHATA I., Flow theory for sand during rotation of principal stress direction, Soils and Foundations, 31, 4, pp. 121-132, (1991)
  • [8] GUTIERREZ M, ISHIHARA K., Non-coaxiality and energy dissipation in granular materials, Soils and Foundations, 40, 2, pp. 49-59, (2000)
  • [9] LI X, YANG D, YU H S., Macro deformation and micro structure of 3D granular assemblies subjected to rotation of principal stress axes, Granular Matter, 18, 3, (2016)
  • [10] RUDNICKI J W, RICE J R., Conditions for the localization of deformation in pressure-sensitive dilatant materials, Journal of the Mechanics and Physics of Solids, 23, 6, pp. 371-394, (1975)
1234