Impact of stiffness properties and overconsolidation on the lateral behaviour of monopile foundations in clay deposits
Impact of stiffness properties and overconsolidation on the lateral behaviour of monopile foundations in clay deposits
The adoption of advanced constitutive models based on the Critical State Soil Mechanics framework present both advantages and challenges. The former are well established and relate to improvements in accuracy and, due to the frequent use of the framework in explaining soil behaviour, a calibration process which is frequently simpler. However, their use in modelling of clays means that consistency between different soil properties, such as undrained shear strength and overconsolidation ratio, needs to be insured. The application of one of such models is explored in this paper in the context of offshore foundations. The influence on the lateral capacity of the foundations of different profiles of undrained shear strength, a property which is not prescribed but rather interpreted from the model parameters and initial conditions, is shown to be substantial at all values of displacement. Similarly, the use of a highly non-linear model for the shear stiffness is explored and the impact of the associated parameters is observed to be confined to the lateral stiffness of the monopile under small lateral loads.
David M. G. Taborda; Aikaterini Tsiampousi; K. Georgiadis
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
E - Environment, water and energy
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