Research Article
Nov 1977
Bearing Capacity by Variational Method
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VIEW THE REPLYAuthors: Michael Garber and Rafael BakerAuthor Affiliations
Publication: Journal of the Geotechnical Engineering Division
Volume 103, Issue 11
Abstract
A general limit equilibrium approach has been applied to the problem of bearing capacity of foundations. The approach is completely rigorous in the sense that the critical rupture surface and the critical stress distribution along it are derived by variational methods without any a priori assumptions. The critical rupture surface has been proven to be log-spiral, which degenerates to a circular arc in the case of the frictionless soil. The superposition principle that was assumed by Terzaghi is derived by the use of variational analysis. The values of the obtained bearing capacity factors Nc(φ) and Nq(gf) corresponds closely to that obtained from the plasticity theory. The N/dγ(φ) factor obtained corresponds rather well with De Beer's and Feda's experimental results, while Terzaghi's solution for N/dγ(φ) is too low by a factor of approximately two.
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Published In
Journal of the Geotechnical Engineering Division
Volume 103 • Issue 11 • November 1977
Pages: 1209 - 1225
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Nov 1977
Published online: Feb 11, 2021
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Authors
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Michael Garber
Research Fellow; Soil Sci. Dept., Faculty of Agricultural Engrg., Technion—Israel Inst. of Tech., Haifa, Israel
Rafael Baker
Lect., Soil Mechanics Dept., Faculty of Civ. Engrg., Technion—Israel Inst. of Tech., Haifa, Israel
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