Based on the analytical solutions for wave-induced soil response in an unsaturated anisotropic seabed of finite thickness, an elliptical, i.e., noncircular rotation stress path is proven to be a more common state in a soil element with the cyclic shear stresses due to the traveling linear wave. The influence of an elliptical stress path on the characterization of failure strength is analyzed using three new parameters representing the shape, size, and the orientation of the ellipse. A series of cyclic rotational shear tests on the reconstituted specimens of Chinese Fujian Standard Sand have been performed to investigate the effect of elliptical stress path. A strength function in term of failure cycles is derived to quantify the failure strength of a given sand within a seabed subjected to regular wave loading. The results provide a basis for the evaluation of liquefaction potential of seabed but also point to a unique backbone cycle shear strength curve for soil under principal stress rotation.

Item Type:	Refereed Article
Keywords:	elliptical rotation stress path, failure strength, principal stress rotation, wave loading
Research Division:	Engineering
Research Group:	Maritime Engineering
Research Field:	Marine Engineering
Objective Division:	Construction
Objective Group:	Construction Materials Performance and Processes
Objective Field:	Cement and Concrete Materials
Author:	Chan, A (Professor Andrew Chan)
ID Code:	122192
Year Published:	2017
Deposited By:	Engineering
Deposited On:	2017-11-04
Last Modified:	2018-06-18
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