Simulation of large displacements during lateral pile loading in anisotropic, overconsolidated fine-grained soils
Simulation of large displacements during lateral pile loading in anisotropic, overconsolidated fine-grained soils
Offshore foundations in fine-grained soils may be affected by rate dependency, anisotropy, and overconsolidation throughout their lifespan. While common constitutive models account for these effects, they are often limited to small deformation problems. This study applies the Anisotropic Visco ISA model (AVISA) which is able to capture these complex behaviours and has been adapted for large-scale boundary problems involving large deformations. Using Finite Element Method (FEM) with the Coupled Euler-Lagrange Method (CEL), lateral loading on a pile is simulated under varying anisotropic conditions and overconsolidation ratios. The analysis focuses on pile resistance and the impact of pile movement on stress distribution and void ratio. While previous findings showed minimal differences in void ratio, horizontal stresses, and pile resistance during vertical loading under both isotropic and anisotropic conditions, lateral loading produced differences of up to 100 %. Overall, results indicate that the AVISA model represents deformation accumulation under anisotropic stiffness distribution and various overconsolidation ratios qualitatively well and that it is a promising tool for designing offshore foundations.
Merita Tafili; Duy Anh Dao; Jurgen Grabe; T. Wichtmann
5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)
8 - Monopile design to lateral monotonic loads
https://doi.org/10.53243/ISFOG2025-61
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