Research Article
Jun 1972
Shear Modulus and Damping in Soils: Measurement and Parameter Effects (Terzaghi Leture)
Publication: Journal of the Soil Mechanics and Foundations Division
Volume 98, Issue 6
Abstract
Based on numerous tests on a spectrum of disturbed and undisturbed soils, the shear modulus decreases and the damping ratio increases very rapidly with increasing strain amplitude. The rate of increase or decrease depends on many parameters: (1) Effective mean principal stress; (2) degree of saturation; (3) void ratio; and (4) number of cycles of loading. Ambient states of octahedral shear stress, overconsolidation ratio, effective strength envelope, frequency of loading, and time effects have a less important influence on these properties. Cohesive soils are affected differently than clean sands. The apparatus used to measure shear modulus and damping must be capable of making accurate measurements at very small shearing strains, the range being defined by practical problems in earthquake and foundation vibrations. A pseudo static simple shear apparatus and two different resonant column apparatus were used.
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Published In
Journal of the Soil Mechanics and Foundations Division
Volume 98 • Issue 6 • June 1972
Pages: 603 - 624
Copyright
© 1972 American Society of Civil Engineers.
History
Published in print: Jun 1972
Published online: Feb 12, 2021
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Authors
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Bobby O. Hardin, M.ASCE
Prof. of Civ. Engrg., Univ. of Kentucky, Lexington, KY.
Vincent P. Drnevich, AM.ASCE
Asst. Prof. of Civ. Engrg., Univ. of Kentucky, Lexington, KY.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
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