Degradation of Sands due to Combined Sinusoidal Loading
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 132, Issue 12
Abstract
Dynamic loading due to earthquakes is made up of very complicated combinations of different types of waves including compressive waves, shear waves, etc. If a soil specimen is subjected to a combined longitudinal and torsional excitation, significant degradation of the specimen occurs, wherein the modulus is reduced and the damping increased more than for single excitation. This paper presents equations based on test results on clean sands for the determination of the shear modulus and damping of sandy soils for single and combined sinusoidal loadings. From the equations, the degree of specimen degradation can be determined, as well as the threshold strain ratio needed for the degradation to occur. The dynamic properties obtained from combined loadings will be more representative of actual field conditions than those from single-loading conditions.
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References
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Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 132 • Issue 12 • December 2006
Pages: 1628 - 1632
Copyright
© 2006 ASCE.
History
Received: Dec 30, 2004
Accepted: Jun 23, 2006
Published online: Dec 1, 2006
Published in print: Dec 2006
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