Research Article
Jan 1978
Undrained Stresses and Deformations under Footings on Clay
Publication: Journal of the Geotechnical Engineering Division
Volume 104, Issue 1
Abstract
Axisymmetric finite element analyses using a total stress, minimum potential energy approach, were carried out to predict undrained stress-distribution and load-deformation behavior of a circular footing resting on clay. The stress-strain data obtained through laboratory tests on simulated field elements were approximated by a bilinear elastic, perfect plastic model, for use in the analyses. It was found that the type of finite element analysis was incapable of correctly computing simultaneously both stresses and deformations from a single analysis. Very good prediction of stress distribution could be obtained by keeping the Poisson's ratio constant throughout in the analysis. On the other hand, computed deformations agreed very well with the measured values when, in the nonlinear analysis, Poisson's ratio was adjusted whenever there was a change of stress-strain modulus, keeping the bulk modulus constant.
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Published In
Journal of the Geotechnical Engineering Division
Volume 104 • Issue 1 • January 1978
Pages: 11 - 25
Copyright
© 1978 American Society of Civil Engineers.
History
Published in print: Jan 1978
Published online: Feb 11, 2021
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Authors
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Subhas C. Das
Reader of Civ. Engrg., Jadavpur Univ., Calcutta, India
Chitta R. Gangopadhyay, M.ASCE
Chf. Soils Engr., Soil and Materials Engrs., Inc., Detroit, Mich
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