Limit analysis of soil slopes subjected to pore-water pressures

被引:117
作者
Kim, J [1 ]
Salgado, R
Yu, HS
机构
[1] Purdue Univ, Sch Civil Engn, W Lafayette, IN 47907 USA
[2] Univ Newcastle, Dept Civil Surv & Environm Engn, Newcastle, NSW 2308, Australia
关键词
D O I
10.1061/(ASCE)1090-0241(1999)125:1(49)
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
The limit-equilibrium method is commonly used for slope stability analysis. However, it is well known that the solution obtained from the limit-equilibrium method is not rigorous, because neither static nor kinematic admissibility conditions are satisfied. Limit analysis takes advantage of the lower- and upper-bound theorems of plasticity to provide relatively simple but rigorous bounds on the true solution. In this paper, three-noded linear triangular finite elements are used to construct both statically admissible stress fields for lower-bound analysis and kinematically admissible velocity fields for upper-bound analysis. By assuming linear variation of nodal and elemental variables, the determination of the best lower- and upper-bound solution may be set up as a linear programming problem with constraints based on the satisfaction of static and kinematic admissibility. The effects of pore-water pressure are considered and incorporated into the finite-element formulations so that effective stress analysis of saturated slopes may be done. Results obtained from limit analysis of simple slopes with different ground-water patterns are compared with those obtained from the limit-equilibrium method.
引用
收藏
页码:49 / 58
页数:10
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