Experimental study of soils under cyclic loading with direction varying about a mean direction
Experimental study of soils under cyclic loading with direction varying about a mean direction
As offshore wind energy development advances into deep water, floating offshore wind is being increasingly considered. However, high cost remains a significant barrier to the development of floating offshore wind. Fabrication and installation costs can be reduced by sharing mooring points in a large floating wind turbine array. However, the complex environmental loads and the phase difference between the mooring lines cause the direction of net mooring load on the shared anchors to vary within a certain angular range. To investigate the mechanical response of the soil surrounding shared anchors under this special loading condition, this study employed the variable direction dynamic cyclic simple shear (VDDCSS) testing apparatus and conducted a series of cyclic direct simple shear (DSS) tests with directions varying about a mean direction on kaolin. By comparing and analysing the results of the tests, it was observed that variation in the direction of cyclic loading within a certain angular range accelerates soil failure under cyclic loading. Analysis of the number of cycles to failure, shear strain, and pore pressure results provided preliminary insights into the mechanisms.
Qian Bi; Youhu Zhang; Yusuke Suzuki; Changxin Lyu
5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)
3 - Constitutive models and soil behaviour modelling
https://doi.org/10.53243/ISFOG2025-463
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