Reliability Analysis of Geogrid-Reinforced Wall by Coupling Finite Element with The Point Estimation Method

The stability of the geogrid reinforced retaining wall is an important problem in geotechnical projects. On the other hand, the stability of this type of retaining system is closely related to soil heterogeneity and the contribution of different stability modes. In this study, a stochastic analysis is presented for considering the assistance of the various stability modes with attending to the inherent uncertainty of soil properties. For this purpose, by coupling the Finite Element Method (FEM), and Point Estimation Method (PEM) the effect of reinforced fill, retained fill, and foundation soil are selected as uncertain variables. A codded program is developed by MATLAB to run ۲۵۶ cases of elasto-plastic analysis of geogrid reinforced walls based on PEM modes. The results show global stability is more critical compared to rupture and sliding stability based on their reliability indices. Furthermore, in rupture stability reliability analysis, the lower layers of geogrid show a weaker performance

کلیدواژه ها:

Geogrid reinforced wall ، Finite element method ، Point estimation method ، Reliability analysis