期刊
ENGINEERING GEOLOGY
卷 250, 期 -, 页码 65-88出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.enggeo.2019.01.012
关键词
Extended finite element method; Step-path brittle failure; Rock slope; Non-persistent en-echelon joints; Crack propagation and coalescence
资金
- project 973 [2014CB046903]
- National Natural Science Foundation of China [51325903, 51679017]
- Natural Science Foundation Project of CQ CSTC [cstc2013kjrcljrccj0001, cstc2016jcyjys0005, cstc2015jcyjys0002, cstc2015jcyjys0009]
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.
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