Research Article
Feb 1963
Model Studies of Beams Resting on a Silt Subgrade
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VIEW THE REPLYAuthors: A. B. Vesic, M.ASCE, and W. H. Johnson, AM.ASCEAuthor Affiliations
Publication: Journal of the Soil Mechanics and Foundations Division
Volume 89, Issue 1
Abstract
Models of beams of different stiffnesses resting on a subgrade of compacted micaceous silt were equipped with strain gages and loaded by various combinations of concentrated vertical loads. Investigations indicate that the pressure distribution, bending moments, and deflections are similar to those occurring under beams resting on an elastic solid. The investigation also confirms that the elementary approach using the concept of mudulus of subgrade reaction is plausible if the beams are sufficiently long. In addition, it was confirmed that the modulus of subgrade reaction depends on the relative flexibility of the beam. Only small changes were observed in pressure distribution as the loads were increased to and over the ultimate values; and little difference was found between bearing capacities of soil beneath beams of differing stiffnesses so long as conditions existed for failure in the soil occurring while beam stresses were still in the elastic range.
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Published In
Journal of the Soil Mechanics and Foundations Division
Volume 89 • Issue 1 • February 1963
Pages: 1 - 32
Copyright
© 1963 American Society of Civil Engineers.
History
Published in print: Feb 1963
Published online: Feb 12, 2021
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Authors
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A. B. Vesic, M.ASCE
Assoc. Prof. of Civ. Engrg., Georgia Inst. of Tech., Atlanta, Ga.
W. H. Johnson, AM.ASCE
Civ. Engr., Bur. of Reclamation, Denver, Colo.; formerly, Grad. Research Asst., Georgia Inst. of Tech., Atlanta, Ga.
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