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- W776886064 abstract "Stability analyses of slopes are carried out by limit equilibrium methods which require some assumptions to overcome statically indeterminacy of the problem. This method is generally based on the definition of Factor of Safety (FS) as the ratio of shear strength of the soil to the shear stresses developed due to its own load and other destabilising factors. But this method is unable to determine the stress state below the failure path. To overcome these difficulties the slopes have been analysed by finite element method. In this paper the slopes have been analysed by finite element method with discretising it eight nodded quadrilateral elements with four Gauss integration points within each element. In this method the slope forming material, i.e., soil, has been characterised as non-linear elasto-plastic material satisfying Mohr-Coulomb failure criterion with non-associated flow rule. The system is under gravity loading, i.e., weight of the soil. The solution to the problem is the displacement at the nodal points. By using these finally stresses were obtained by keeping them outside the failure function (F) < 0 criterion for a specified no of interations. If a sizable number of elements are not satisfying the failure function (F) < 0 criterion within a specified number of iterations, the slope is then assumed to be failed. On the basis of above assumptions and using the slope stability problem as a two-dimensional plane strain model, a program has been developed at Central Road Research Institute (CRRI), New Delhi. By using this program displacements at nodal points and stresses at Gauss integration points within the element were obtained. Finally, on the basis of stresses and displacements obtained detailed analysis of slopes was carried out. In this way, the following [(a) Zone of equal FS obtained, (b) Overall FCS of slope obtained by strength reduction technique, (c) FS obtained along the path obtained by minimizing the expression of FS with respect to the angle of inclination of failure surface to the horizontal, (d) Deformed shape of slope geometry based on horizontal and vertical displacement.] characteristics were depicted to show the failure pattern of slope and the numerical value of factor of safety (FS). Finally, to justify these results and its usefulness to incorporate the remedial measures to control the landslide hazard, these were compared with the results obtained from conventional method of slope stability analysis, such as Bishop's method of slices for circular failure surfaces, and by stability charts." @default.
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- W776886064 date "2012-08-01" @default.
- W776886064 modified "2023-09-24" @default.
- W776886064 title "Stability analysis of embankments/slopes by finite element method" @default.
- W776886064 hasPublicationYear "2012" @default.
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