Formulation of a practical multi-surface plasticity model for sands
Formulation of a practical multi-surface plasticity model for sands
This paper presents a new effective stress constitutive model for sands subjected to either monotonic or cyclic loading; the model is referred to as ‘PIMSS’ (Parallel Iwan Multi-Surface Sand). PIMSS has been developed for geotechnical design applications with an emphasis on the simulation of offshore wind turbine (OWT) monopile foundations in sand. The model employs a parallel Iwan approach, comprising multiple elastoplastic micro-models; it is capable of predicting Masing- type nonlinear hysteretic response without the need for translating surfaces and kinematic hardening rules. From an industry perspective, an attractive feature of the PIMSS model is that it can readily be calibrated via standard geotechnical laboratory testing procedures. An advantage of this modelling concept is that each micro-model is numerically implemented as a single- surface plasticity model; this eases the model implementation process. The theoretical framework and calibration processes for the model are explained. Single-element simulations and comparisons with available test data are described.
Dimitrios Konstantinidis; H. J. Burd; C. M. Martin
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
E - Environment, water and energy
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