A soil constitutive model construction method based on triaxial test with an image measurement technique

被引：0
|
作者：
Shao L. [1 ,2 ]
Wu X. [1 ,2 ]
Tian X. [3 ]
Guo X. [1 ,2 ]
Chen Z. [4 ]
机构：
[1] Department of Engineering Mechanics, Dalian University of Technology, Dalian
[2] State Key Laboratory of Structural Analysis, Dalian University of Technology, Optimization and CAE Software for Industrial Equipment, Dalian
[3] National Key Laboratory of Intelligent Mining Equipment Technology, Taiyuan Heavy Industry Co., Ltd, Shanxi, Taiyuan
[4] State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan
来源：
Tumu Gongcheng Xuebao/China Civil Engineering Journal | 2023年 / 56卷
关键词：
constitutive model; cyclic loading/unloading; digital image processing technique; local variations in measurement;
D O I：
10.15951/j.tmgexb.2023.S2.t22
中图分类号：
学科分类号：
摘要：
A constitutive model is mathematical physical equations describing the mechanical properties of materials, which is necessary for deformation calculation and stability analysis of geotechnical structures. Based on triaxial tests using an image measurement technique, it was found that the stress/strain are inconsistent within the soil sample after local damage occurs, deformation patterns and stress-strain relationships in the damaged and undamaged areas are different, and the stress-strain curve of the sample as a whole is the combined result of the deformations at each part of the sample. It can be considered that there are only two states of the soil: undamaged and damaged. The undamaged soil obeys the stress-strain relationship while the damaged soil follows the friction law and sliding along the direction of damage. Therefore, the methodology of constructing the constitutive model is to describe the stress-strain properties of the soil in the undamaged state, establish the stress-strain relationship model before the damage, select an appropriate damage criterion to determine whether a point is damaged, and then apply the friction law to the soil after the damage. © 2023 Editorial Office of China Civil Engineering Journal. All rights reserved.
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页码：11 / 19
页数：8
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