Undrained Monotonic and Cyclic Triaxial Strength of Sand
Publication: Journal of Geotechnical Engineering
Volume 112, Issue 10
Abstract
The undrained behavior of saturated sand in monotonically loaded triaxial tests is discussed using steady state concepts. The relations among various drained and undrained strength envelopes are first examined. These monotonic loading concepts are then used to explain the effect of static shear stress, on the undrained cyclic triaxial strength of anisotropically consolidated specimens. The effect of is found to depend on whether a specimen is contractive, dilative or partially‐contractive. For contractive specimens, the cyclic strength always increases with increasing if there is stress reversal and if the peak shear stress, is smaller than the steady state shear strength, This effect of stress reversal on cyclic strength is explained by the larger cyclic strains generated in the extension part of the cycle. However, if cyclic strength can increase or decrease with increasing if there is no shear stress reversal, the cyclic strength always decreases with increasing For dilative specimens, cyclic strength always increases with increasing Partially‐contractive sand under cyclic loading behaves like contractive sand for small accumulated failure strains, and similar to dilative sand for large failure strains.
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Copyright © 1986 ASCE.
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Published online: Oct 1, 1986
Published in print: Oct 1986
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