[1]郑方,邵生俊,王松鹤,等.冻融循环对黄土剪切屈服与破坏行为的影响[J].西安建筑科技大学学报(自然科学版),2023,55(05):669-676.[doi:10.15986/j.1006-7930.2023.05.005]
　ZHENG Fang,SHAO Shengjun,WANG Songhe,et al.Effects of freeze-thaw cycles on shear yield and failure behavior of loessU[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2023,55(05):669-676.[doi:10.15986/j.1006-7930.2023.05.005]
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冻融循环对黄土剪切屈服与破坏行为的影响()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
55
期数:
2023年05期
页码:
669-676
栏目:
出版日期:
2023-10-28

文章信息/Info

Title:
Effects of freeze-thaw cycles on shear yield and failure behavior of loessU
文章编号:
1006-7930(2023)05-0669-08
作者:
郑方1; 邵生俊2; 王松鹤2; 刘乃飞1; 王永鑫3
（1.西安建筑科技大学 土木工程学院，陕西 西安 710055；2.西安理工大学 土木建筑工程学院，陕西 西安 710048；3.南昌工程学院 土木与建筑工程学院，江西 南昌 330099）
Author(s):
ZHENG Fang1;  SHAO Shengjun2;  WANG Songhe2;  LIU Naifei1;  WANG Yongxin3
（1.School of Civil Engineering, Xi′an Univ. of Arch. & Tech., Xi′an 710055, China; 2.School of Civil Engineering and Architecture, Xi′an University of Technology, Xi′an 710048, China; 3.School of Civil Engineering and Architecture, Nanchang Institute of Technology, Nanchang, 330099）
关键词:
冻融循环; 真三轴; 屈服应力; 破坏应力; 破坏准则
Keywords:
freeze-thaw cycles;  true triaxial;  yield stress;  failure stress;  failure criteria
分类号:
TU 444
DOI:
10.15986/j.1006-7930.2023.05.005
文献标志码:
A
摘要:
为研究冻融循环作用对黄土剪切屈服与破坏行为的影响，基于不同冻融循环作用下不同中主应力条件下的真三轴剪切试验结果，得到了广义剪应变与应力比的关系曲线，确定出屈服点及其相应的屈服应变和屈服应力，进一步对屈服应力和破坏应力进行了比较，并对不同冻融循环作用下的破坏准则的适用性进行了分析.结果表明：应力比η、屈服应力qy、破坏应力qf随着冻融循环次数的增加，都呈现出先减小后又增大后趋于稳定的变化规律，随着b值的增加都呈现出逐渐减小的变化规律；屈服应变εy大致分布在0.3%到1.6%之间，屈服应力均小于破坏应力；冻融循环作用对π平面上破坏轨迹的形状影响不大，而对其大小会有显著影响，且破坏应力点的破坏轨迹与Lade准则的预测结果较为一致.
Abstract:
In order to study the effect of freeze-thaw cycles on shear yield and failure behavior of loess, based on the true triaxial shear test results under different freezethaw cycles and different medium principal stress conditions, the relationship curve between generalized shear strain and stress ratio was obtained, and the yield point and its corresponding yield strain and yield stress were determined. Furthermore, the yield stress and failure stress were compared, and the applicability of failure criteria under different freeze-thaw cycles was analyzed. The results show that the stress ratio η, yield stress qy, and failure stress qf decrease first and then increase and then tend to be stable with the increase of freezethaw cycles, and decrease gradually with the increase of b value. The yield strain εy is roughly distributed between 0.3% and 1.6%, and the yield stress qy, is less than the failure stress qf. The freeze-thaw cycle has little effect on the shape of the failure trajectory on the π plane, but has a significant effect on its size, and the failure trajectory of the failure stress point is consistent with the prediction results of Lade′s criterion.

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备注/Memo

备注/Memo:
收稿日期:2022-06-15修回日期:2023-08-30
基金项目:国家自然科学基金项目（52208368）
第一作者:郑方(1989—)，女，博士，讲师，主要研究黄土力学与非饱和土力学. E-mail: zhengfang@xauat.edu.cn
更新日期/Last Update: 2023-11-02