Browsing by Author "Tibebu, Gebremeskel"

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    Three-Dimensional Finite Element Modeling of Laterally Loaded Single Passive Pile in Sandy Soils
    (Addis Ababa University, 2020) Tibebu, Gebremeskel; Henok, Fikre (PhD)
    In this thesis, the behavior of a single passive pile subjected to uniform and/ or triangular lateral soil movement has been carried out by means of a three-dimensional finite element numerical model using PLAXIS 3D software. The Mohr-Coulomb constitutive material law, and linear elastic - plastic model was used to model the surrounding soil and the embedded pile respectively. The accuracy of the three dimensional finite element analysis were validated using published model laboratory test results, and also with a three dimensional finite difference analysis software, FLAC . It was concluded that the 3D finite element analysis results agree with published laboratory test results, and FLAC 3D results in terms of the shape, and magnitude of the maximum bending moment, shear force and pile deflection profile curves. A parametric study was carried out to investigate the effect shape of soil movement profile, soil stiffness, pile diameter and the ratio of Lm/Ls. The results of the parametric study were in good agreement with published laboratory results. The numerical results indicated that the distribution of the bending moment and pile deflection along with the depth of the pile vary considerably, and the results were in good agreement the real pile behavior when adopting a variation of soil stiffness with depth instead of choosing a constant soil stiffness value. 3D