Research Article
Mar 1968
Cyclic Stress-Strain Characteristics of Clay
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VIEW THE REPLYPublication: Journal of the Soil Mechanics and Foundations Division
Volume 94, Issue 2
Abstract
The decreases in moduli and increases in yield strain occurring during cyclic loading of sensitive clay under simple shear conditions are examined. The loading conditions are representative of those associated with the upward propagation of a seismic shear wave through a large mass of soil; i.e., the strain is completely reversed during each cycle at the rate of 1 cps. The moduli and yield strain reported are those defining the bilinear hysteresis models which best fit the nonlinear stress-strain characteristics obtained from the tests. For San Francisco Bay Mud the moduli are constant for strain levels greater than 2% and for loading cycles after the fiftieth. Yield strain, however, is proportional to cyclic strain level for at least 200 cycles. The strength and moduli measured under static loading conditions are decreased by cyclic loading involving large strains, but only the modulus is decreased by loading restricted to strains below about 1%.
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Published In
Journal of the Soil Mechanics and Foundations Division
Volume 94 • Issue 2 • March 1968
Pages: 555 - 569
Copyright
© 1968 American Society of Civil Engineers.
History
Published in print: Mar 1968
Published online: Feb 12, 2021
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Authors
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Gerald R. Thiers, AM.ASCE
Asst. Prof., Carnegie Inst. of Technology, Pittsburgh, Pa.
H. Bolton Seed, M.ASCE
Prof. of Civ. Engrg., Univ. of California, Berkeley, Calif.
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