Discussion on soil slope failure criterion of finite element method with shear strength reduction technique (SSR-FEM)

作者：Yiliang Tu^*; Xinrong Liu; Zuliang Zhong; Yongquan Liu

来源：Electronic Journal of Geotechnical Engineering, 2014, 19 U: 6139-6148.

• Applicable conditions
• Convergence criterion
• Failure criteria
• Numerical calculation
• Shear strength reduction technique
• Soil slopes
• SSR-FEM
• Stability analysis

SSR-FEM is more and more widely used in soil slope stability analysis. Nonetheless, failure criteria of slope in SSR-FEM are still not unified, which restricts the development of SSR-FEM in engineering. Three kinds of failure criteria are most widely used in SSR-FEM: numerical calculation convergence criterion, the abruptness of a characteristic nodal displacement criterion and the connectivity of plastic zone in the slope criterion. Based on a soil slope model by FLAC, this paper details the advantages, disadvantages and applicable conditions of the three failure criteria. Then a modified failure criterion is proposed and its advantages are proved. In the end, through analyzing how to choose soil slopes'failure criteria, this paper has provided references for failure criteria's unifying and selecting when calculate soil slope's safety factor.

• 出版日期2014--