Evaluation of the Interslice Side Forces for Lateral Earth Force and Slope Stability Problems
Date
1983-08
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Degree Level
Masters
Abstract
The limit equilibrium method of slices has an inherent problem of static indeterminancy. A solution requires either additional knowledge on the forces acting within the slip surface or an assumption regarding some of the forces to render the analysis determinate. In general, the latter approach has been found to be the more practical alternative.
The most commonly utilized assumptions are those regarding the direction of the interslice side forces. However, these assumptions can vary widely and difficulties frequently occur as a result. The lack of understanding of the interslice side forces implies that assumptions have to be made on the basis of intuition and experience. The need for a theoretical and systematic way of evaluating the interslice force function is apparent.
The direction of the interslice side forces was obtained using a two-dimensional constant strain finite element method. Both linear and nonlinear stress-strain relationships were used to study their influences on the stress distribution. Analyses were performed for slope stability and lateral earth force problems. Simpson's method of integration was used to integrate the average nodal stresses for evaluating the interslice force ratios.
A version of the slope stability program, SLOPE-II was modified to accommodate the generalized function. The generalized function predicts the distribution of the interslice side force ratio for slope stability and lateral earth force problems. Various example problems were carried out to verify the performance of the modified SLOPE-II program.
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Degree
Master of Science (M.Sc.)
Department
Civil Engineering
Program
Civil Engineering