Extended finite element simulation of step-path brittle failure in rock slopes with non-persistent en-echelon joints

被引：84
作者：
Zhou, Xiaoping [1 ,2 ]
Chen, Junwei [1 ,2 ]
机构：
[1] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400045, Peoples R China
[2] Chongqing Univ, Sch Civil Engn, Chongqing 400045, Peoples R China
来源：
ENGINEERING GEOLOGY | 2019年 / 250卷
基金：
中国国家自然科学基金;
关键词：
Extended finite element method; Step-path brittle failure; Rock slope; Non-persistent en-echelon joints; Crack propagation and coalescence; MODELING CRACK-GROWTH; STABILITY ANALYSIS; MULTIPLE CRACKS; PROPAGATION; COALESCENCE; DEFORMATION; FRACTURE;
D O I：
10.1016/j.enggeo.2019.01.012
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
The aim of this paper is to investigate the brittle failure mechanism of rock slopes with non-persistent en-echelon joints using the extended finite element method (XFEM). In the research, a novel geometrical method distinguished from the conventional level set method is proposed to describe the cracks in the XFEM. The numerical form of the J-integral considering the effect of the bode force and the frictional contact force is provided. Moreover, a refined coalescence method is proposed. Then, the state function employed to define the state of the crack and the method used to define the crack growth increment are introduced. Next, some numerical tests are carried out to validate the feasibility of the XFEM. Finally, two typical rock slope modes are provided to illustrate the mechanism of the step-path brittle failure of rock slopes.
引用
收藏
页码：65 / 88
页数：24
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