Impact of soil parameters on cyclic pull-out capacity of offshore screw anchors
Impact of soil parameters on cyclic pull-out capacity of offshore screw anchors
This paper presents a comparison of the cyclic behaviour of offshore screw anchors for various soils using the Simplified UnDrained Cyclic Accumulation Model (UDCAM-S). In producing the required stress-strain contours for UDCAM-S, a new correction procedure proposed in previous research with reference to a database of Drammen clay is followed and performed on Gulf of Mexico clay, the results of which are compared with the physical soil test results of the same clay. Stress-strain contours are also constructed for a Kaolin clay following the same procedure. Thereafter, modelling of the screw anchor is performed using the finite element method to investigate its pull-out capacity under cyclic tension, for each of the selected clays. Based on a chosen failure criterion, the bearing capacity is determined and normalised. According to the stress-displacement curves of the simulated screw anchor for each given clay, the validity of the correction procedure is investigated by comparing the corrected and experimental test results, and the effects of plasticity index are assessed to determine the associated impact on the anchor cyclic behaviour.
C. F. Ho; A. Dyson; Ali Tolooiyan
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
E - Environment, water and energy
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