Abstract
This paper emphasizes on the required guidelines for establishing a geotechnical finite-element model. The steps that must be taken to construct such a model are explained in a flowchart, and the methodology described therein is illustrated by building a model using commercially available finite-element software. Well-documented experimental test data are used to validate the model results. The effects of the geometry plotting, meshing techniques, and boundary locations are assessed by comparing the model results with the experimental results. To date, various geotechnical constitutive models have been proposed to describe various aspects of actual soil behavior in detail, and the advantages and limitations of five such models are discussed. The model results are subjected to an assessment check. The geotechnical modeler can be decided based on the knowledge base that constitutive models will use as the case.
Highlights
In geotechnical engineering, the frequently used term “Finite-Element (FE) modeling” refers to a numerical technique whereby engineering structures and their surrounding soil are discretized into certain numerical elements that obey specific constitutive laws
Recent FE software is inadequate for analyzing vast geotechnical engineering problems
The primary phase that significantly impacts the behavior and results of the geotechnical FE model is that the 3D geometry plotting model acts as the most realistic geometry used with suitable computing power and time consumed
Summary
The frequently used term “Finite-Element (FE) modeling” refers to a numerical technique whereby engineering structures and their surrounding soil are discretized into certain numerical elements that obey specific constitutive laws. Because soil behaves in a complicated and nonlinear manner, all methods for modeling it are necessarily numerical [1], and geotechnical engineers tend to use methods based on FE theory. A numerical FE model of a geotechnical problem must simulate the actual field conditions of that problem. The model must capture the complex behavior of the soil to provide accurate deformations, settlement, and straining actions, thereby giving engineers a unique perspective for making evaluations and judgments. (1) shows a flowchart that explains the stages of establishing a geotechnical FE model. To explain the modeling stages each stage is illustrated using a selected case study. A study carried out laboratory experiments to provide data to verify associated two-dimensional (2D) and threedimensional (3D) FE models [2].
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