Non coaxial sub-loading surface model and its application in numerical simulation of foundation bearing characteristics

被引：0
|
作者：
Kong L. [1 ,2 ]
Wang X. [2 ]
Li X. [3 ]
机构：
[1] School of Sciences, Qingdao University of Technology, Qingdao
[2] School of Civil Engineering, Qingdao University of Technology, Qingdao
[3] Solid Mechanics Institute, Ningxia University, Yinchuan
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2021年 / 40卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Bearing characteristics of foundation; Foundation engineering; Modified non-coaxial theory; Sub-loading surface model;
D O I：
10.13722/j.cnki.jrme.2020.1061
中图分类号：
学科分类号：
摘要：
The traditional elasto-plastic models cannot consider the non-coaxial plastic deformation of soils when simulating the bearing capacity of foundations. In this paper, a non-coaxial plastic model was established by introducing the modified non-coaxial theory into the sub-loading surface model, and the model was embedded into ABAQUS software through the user material subroutine interface. Then, the model was used to predict the bearing characteristics of clay foundations with different degrees of over-consolidation. The results show that, when the non-coaxial plasticity is considered, the predicted maximum settlement increases with decreasing the non-coaxial plastic modulus, and that the influence of the non-coaxial plastic modulus on the simulation results is related to the over-consolidation degree of foundation soils. In addition, decreasing the non-coaxial plastic modulus to the shear modulus will have a relatively significant effect on the predicted maximum settlement. Therefore, when the actual non-coaxial plastic modulus is less than the shear modulus, the influence of the non-coaxial plastic deformation should be carefully considered in foundation engineering to ensure safety. © 2021, Science Press. All right reserved.
引用
收藏
页码：2535 / 2544
页数：9
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