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Numerical modeling of triaxial tests on clays with sand-column inclusions -

Show simple item record Skeini, Hassan Adnan, 2017-08-30T14:12:34Z 2017-08-30T14:12:34Z 2015 2015
dc.identifier.other b18328866
dc.description Thesis. M.E. American University of Beirut. Department of Civil and Environmental Engineering, 2015. ET:6153
dc.description Advisor : Dr. Shadi Najjar, Associate Professor, Civil and Environmental Engineering ; Co-Advisor : Dr. Salah Sadek, Professor, Civil and Environmental Engineering ; Member of Committee : Dr. George Saad, Assistant Professor, Civil and Environmental Engineering.
dc.description Includes bibliographical references (leaves 237-243)
dc.description.abstract Ground improvement of soft soils using granular inclusions is an efficient technique that increases the rate of consolidation, reduces settlements, and enhances the load-carrying capacity of the composite system. The finite element method (FEM) has been widely implemented to study different aspects related to the behavior of the composite system such as the effect of column installation, column encasement, and the column group behavior. Triaxial testing has been widely adopted in the experimental studies because it allows controlling the confining pressure, loading rates, and drainage conditions of the sample. The use of FEM to model triaxial tests is restricted to samples with a homogeneous soil material and focuses mainly on the effect of boundary conditions and the applicability of different constitutive models to capture soil behavior. Also, the FEM studies were limited to fully drained or undrained conditions, whereas the response of soft clays that are reinforced with granular columns is expected to be affected by the rate of loading and drainage conditions, and the field behavior of the composite system is expected to be partially drained. The objectives of this study are to (1) characterize thoroughly the proper modeling conditions that facilitate simulating conventional consolidated drained (CD), undrained (CU) and consolidated partially drained (CpD) triaxial compression tests involving non-homogeneous specimens composed of clay and granular inclusions, (2) verify the models results using selective high quality experimental triaxial tests that are published in the literature, (3) investigate, numerically, the mechanism of partial drainage between sand and clay during triaxial testing, and (4) complement the analysis with a field-scale application that will be simulated using the proposed finite element model. The significance of partial drainage in the field is highlighted in this application, and its impact is investigated on the design parameters involved in systems of clays reinforced with sand colu
dc.format.extent 1 online resource (xviii, 243 leaves) : illustrations (some color) ; 30cm
dc.language.iso eng
dc.relation.ispartof Theses, Dissertations, and Projects
dc.subject.classification ET:006153
dc.subject.lcsh Finite element method.
dc.subject.lcsh Drainage.
dc.subject.lcsh Columns.
dc.subject.lcsh Clay.
dc.subject.lcsh Kaolin.
dc.subject.lcsh Shear strength of soils.
dc.subject.lcsh Reinforced soils.
dc.title Numerical modeling of triaxial tests on clays with sand-column inclusions -
dc.type Thesis
dc.contributor.department Faculty of Engineering and Architecture.
dc.contributor.department Department of Civil and Environmental Engineering,
dc.subject.classificationsource AUBNO
dc.contributor.institution American University of Beirut.

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