Finite element model with imposed slip surfaces for earth mass safety evaluation
来源期刊：中南大学学报(英文版)2014年第9期
论文作者：Nuno ARAúJO Gaspar J. MACHADO Júlio B. MARTINS Hugo M. R. D. SILVA
文章页码：3627 - 3638
Key words：slope stability; probabilistic methods; reliability; genetic algorithms; safety factor
Abstract: The study of earth masses requires numerical methods that provide the quantification of the safety factor without requiring detrimental assumptions. For that, equilibrium analysis can perform fast computations but require assumptions that limit its potentiality. Limit analysis does not require detrimental assumptions but are numerically demanding. This work provides a new approach that combines the advantage of both the equilibrium method and the limit analysis. The defined hybrid model allows probabilistic analysis and optimization approaches without the assumption of interslice forces. It is compared with a published case and used to perform probabilistic studies in both a homogeneous and a layered foundation. Analyses show that the shape of the density probability functions is highly relevant when computing the probability of failure, and soil elasticity hardly affects the safety of factor of the earth mass.
Nuno ARAúJO1, Gaspar J. MACHADO2, Júlio B. MARTINS2, Hugo M. R. D. SILVA1
(1. C-TAC, Territory, Environment, and Construction Research Centre, School of Engineering,
University of Minho, Guimar？es 4800-058, Portugal;
2. Centre of Mathematics, School of Sciences, University of Minho, Guimar？es 4800-058, Portugal)
Abstract:The study of earth masses requires numerical methods that provide the quantification of the safety factor without requiring detrimental assumptions. For that, equilibrium analysis can perform fast computations but require assumptions that limit its potentiality. Limit analysis does not require detrimental assumptions but are numerically demanding. This work provides a new approach that combines the advantage of both the equilibrium method and the limit analysis. The defined hybrid model allows probabilistic analysis and optimization approaches without the assumption of interslice forces. It is compared with a published case and used to perform probabilistic studies in both a homogeneous and a layered foundation. Analyses show that the shape of the density probability functions is highly relevant when computing the probability of failure, and soil elasticity hardly affects the safety of factor of the earth mass.
Key words:slope stability; probabilistic methods; reliability; genetic algorithms; safety factor
