Progressive Failure of a Dam Abutment: A Fracture Mechanics Analysis

Published on Mar 7, 2008
路 DOI :10.1061/40972(311)60
C. S. Kao6
Estimated H-index: 6
(UMN: University of Minnesota),
N. T. Schwanz1
Estimated H-index: 1
(USACE: United States Army Corps of Engineers),
Joseph F. Labuz32
Estimated H-index: 32
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A new apparatus for determining the constitutive response of rock and concrete, named the University of Minnesota Plane-Strain Apparatus, was designed and built on a passive stiff-frame concept. The biaxial device, with U.S. Patent number 5,063,785, is unique, because it allows the failure plane to develop and propagate in an unrestricted manner, as opposed to conventional systems where the material is constrained by the testing apparatus. By placing the upper platen on a low friction linear bea...
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In heavily over-consolidated clays there is a marked peak in the observed relation between shear stress and shear strain. As the strain increases, the stress falls from a peak to a much smaller residual stress. Slopes made from such a clay often fail progressively many years after construction. Sliding occurs on a concentrated slip surface, and it is found that the mean resolved shear stress on that surface is markedly less than the peak shear strength. Concepts from fracture mechanics, and in p...
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