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Nonlinear Finite Element Analysis of Plain Footing
Plain foundations are shallow foundations which are widely used in construction industry. In traditional analysis of plain footing, the finite element analysis is carried out as plain strain problems in different soil models. In the case of 3D problems, the combined effect of nonlinear behaviour of soil and soil-structure interaction under footing is not accounted for. In this paper, the nonlinear analysis of plain footing is performed by using 3D stress elements and considered the interaction between the soil surface and the bottom of the foundation, that is, the distribution of contact pressure under the plain footing along with the material and geometric nonlinearities. A three-dimensional model of the plain footing having dimensions 0.6 m x 0.6 m x 0.05 m, resting on very soft clay, is considered and the rigorous analysis of the same is performed. The finite element model of the plain footing is developed by using the popular package ABAQUS. The validation of the model is performed by making use of the results from an experimental study available in the literature. A parametric study is also carried out to asses the performance of the footing under the variations of four different soil parameters, viz, elastic modulus, Poisson’s ratio, friction angle and cohesion intercept. Although the elastic properties of the soil have no influence on the bearing capacity of the footing, this is demonstrated for purely of academic interests.
Nonlinear Finite Element Analysis of Plain Footing
Plain foundations are shallow foundations which are widely used in construction industry. In traditional analysis of plain footing, the finite element analysis is carried out as plain strain problems in different soil models. In the case of 3D problems, the combined effect of nonlinear behaviour of soil and soil-structure interaction under footing is not accounted for. In this paper, the nonlinear analysis of plain footing is performed by using 3D stress elements and considered the interaction between the soil surface and the bottom of the foundation, that is, the distribution of contact pressure under the plain footing along with the material and geometric nonlinearities. A three-dimensional model of the plain footing having dimensions 0.6 m x 0.6 m x 0.05 m, resting on very soft clay, is considered and the rigorous analysis of the same is performed. The finite element model of the plain footing is developed by using the popular package ABAQUS. The validation of the model is performed by making use of the results from an experimental study available in the literature. A parametric study is also carried out to asses the performance of the footing under the variations of four different soil parameters, viz, elastic modulus, Poisson’s ratio, friction angle and cohesion intercept. Although the elastic properties of the soil have no influence on the bearing capacity of the footing, this is demonstrated for purely of academic interests.
Nonlinear Finite Element Analysis of Plain Footing
Lecture Notes in Civil Engineering
Singh, Rao Martand (editor) / Sudheer, K. P. (editor) / Kurian, Babu (editor) / Thankachan, Rakhi Elizabeth (author) / Kuriakose, Bennet (author) / Jacob, Jitin (author)
2020-09-22
14 pages
Article/Chapter (Book)
Electronic Resource
English
Plain footing , Nonlinear analysis , Finite element analysis , Contact pressure Engineering , Building Construction and Design , Building Materials , Geoengineering, Foundations, Hydraulics , Transportation Technology and Traffic Engineering , Geotechnical Engineering & Applied Earth Sciences , Remote Sensing/Photogrammetry
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