Slope stability calculated with strength reduction method considering tensile and shear progressive failure

被引：0
|
作者：
Wang W. [1 ]
Chen G. [1 ]
Zhu J. [1 ]
Huang R. [1 ]
机构：
[1] State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, Sichuan
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2018年 / 37卷 / 09期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Progressive failure; Slope engineering; Strain softening model; Strength reduction method; Tensile failure;
D O I：
10.13722/j.cnki.jrme.2018.0213
中图分类号：
学科分类号：
摘要：
The strength of rock deteriorates continuously during the progressive failure of slope and the strength reduction method to calculate the slope stability considering the tensile and shear progressive failure was therefore proposed employing the strain softening model instead of the ideal elasto-plastic model. The method was studied in terms of deterioration function, failure criterion, reduction factor, sliding surface display and reduction range. The ultimate plastic strain was used as the failure criterion for every point in the slope and all the points from the foot to the top of slope reaching the failure were taken as the failure criterion of whole slope. A quantitative index based on the initial stress method of elasto-plastic calculation was presented for displaying the complete sliding surface due to tension and shearing in the slope. The results showed that the plastic zone computed with the strain softening model is obviously smaller than that of ideal elasto-plastic model, and the safety factor of slope considering tensile failure tend to be more dangerous. The tensile and shearing parts of the potential sliding surface of the slope can be displayed and distinguished at the same time by using the quantitative index. © 2018, Science Press. All right reserved.
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页码：2064 / 2074
页数：10
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