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http://dx.doi.org/10.7843/kgs.2009.25.4.19

Characteristics of Collapsed Retaining Walls Using Elasto-plastic Method and Finite Element Method  

Jeong, Sang-Seom (Dept. of Civil Engrg., Yonsei Univ)
Kim, Young-Ho (Dept. of Civil Engrg., Yonsei Univ)
Publication Information
Journal of the Korean Geotechnical Society / v.25, no.4, 2009 , pp. 19-29 More about this Journal
Abstract
In this study, a numerical analysis was performed to predict the sequential behavior of anchored retaining wall where the failure accident took place, and verified accuracy of prediction through the comparisons between prediction and field measurement. The emphasis was given to the wall behaviors and the variation of sliding surface based on the two different methods of elasto-plastic and finite element (shear strength reduction technique). Through the comparison study, it is shown that the bending moment and the soil pressure at construction stages produce quite similar results in both the elasto-plastic and finite element method. However, predicted wall deflections using elasto-plastic method show underestimate results compared with measured deflections. This demonstrates that the elasto-plastic method does not clearly consider the influence of soil-wall-reinforcement interaction, so that the tension force (anchor force and earth pressure) on the wall is overestimated. Based on the results obtained, it is found that finite element method using shear strength reduction method can be effectively used to perform the back calculation analysis in the anchored retaining wall, whereas elasto-plastic method can be applicable to the preliminary design of retaining wall with suitable safety factor.
Keywords
Anchored retaining wall; Elasto-plastic method; Finite element method; Shear strength reduction technique; Sliding surface;
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