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Comparison Between 3D Limit Equilibrium and Shear Strength Reduction Methodologies
Limit equilibrium analysis of slopes has been commonplace in the geotechnical industry for many years. The 2D approach is conservative in that 3D geometric influences are not accounted for in the 2D analysis. The conservatism associated with a 2D analysis has been viewed as a "buffer" or added factor of safety but such conservatism can be problematic. Recent software tools allow for an improved analysis of 3D slopes through limit equilibrium analysis techniques. The industry as a whole must also examine the use of 3D analysis in light of how design expectations are managed. The shear strength reduction (SSR) technique calculates the factor of safety based on an FEM analysis of stresses. However, the SSR technique remains a new analysis in the geotechnical industry. The purpose of this paper is to compare 3D finite element stability analysis with 3D limit equilibrium analysis through the examination of benchmark examples. The classic differences between 2D finite element stress analysis and 2D limit equilibrium stress analysis will be examined. Continuity when going from 2D to 3D analysis is examined.
Comparison Between 3D Limit Equilibrium and Shear Strength Reduction Methodologies
Limit equilibrium analysis of slopes has been commonplace in the geotechnical industry for many years. The 2D approach is conservative in that 3D geometric influences are not accounted for in the 2D analysis. The conservatism associated with a 2D analysis has been viewed as a "buffer" or added factor of safety but such conservatism can be problematic. Recent software tools allow for an improved analysis of 3D slopes through limit equilibrium analysis techniques. The industry as a whole must also examine the use of 3D analysis in light of how design expectations are managed. The shear strength reduction (SSR) technique calculates the factor of safety based on an FEM analysis of stresses. However, the SSR technique remains a new analysis in the geotechnical industry. The purpose of this paper is to compare 3D finite element stability analysis with 3D limit equilibrium analysis through the examination of benchmark examples. The classic differences between 2D finite element stress analysis and 2D limit equilibrium stress analysis will be examined. Continuity when going from 2D to 3D analysis is examined.
Comparison Between 3D Limit Equilibrium and Shear Strength Reduction Methodologies
Lu, H. H. (author) / Xu, L. M. (author) / Fredlund, M. D. (author) / Fredlund, D. G. (author)
Geo-Congress 2014 ; 2014 ; Atlanta, Georgia
Geo-Congress 2014 Technical Papers ; 3112-3121
2014-02-24
Conference paper
Electronic Resource
English
Comparison between 3D Limit Equilibrium and Shear Strength Reduction Methodologies
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