A high-cycle accumulation model for clay and its application to monopile foundations

P Staubach, J Machaček, M Tafili, T Wichtmann - Acta Geotechnica, 2022 - Springer
A high-cycle accumulation (HCA) model predicting the accumulation of permanent strain or
excess pore water pressure in clay under a large number of load cycles is presented. Data …

On the automatic parameter calibration of a hypoplastic soil model

J Machaček, P Staubach, CEG Tavera, T Wichtmann… - Acta Geotechnica, 2022 - Springer
This paper presents an approach for the automatic parameter calibration (AC) of a
hypoplastic constitutive soil model. The calibration software developed in this work simplifies …

Monopile installation in clay and subsequent response to millions of lateral load cycles

P Staubach, L Tschirschky, J Machaček… - Computers and …, 2023 - Elsevier
The installation-induced changes in the state of clayey soils caused by pile driving
processes are investigated numerically. Hydro-mechanically coupled Coupled-Eulerian …

On the AVISA model for clay–Recommendations for calibration and verification based on the back analysis of a piled raft

M Tafili, A Ganal, T Wichtmann, O Reul - Computers and Geotechnics, 2023 - Elsevier
This paper provides a manual for the thorough calibration of material parameters of the
anisotropic visco ISA (AVISA) model and discusses some of the pitfalls that can arise when …

Novel approach to apply existing constitutive soil models to the modelling of interfaces

P Staubach, J Machaček… - International Journal for …, 2022 - Wiley Online Library
A novel scheme to apply constitutive (continuum) soil models to the mechanical modelling of
soil‐structure interfaces is presented. Opposite to existing approaches, all normal stress …

Mortar contact discretisation methods incorporating interface models based on Hypoplasticity and Sanisand: Application to vibratory pile driving

P Staubach, J Machaček, T Wichtmann - Computers and Geotechnics, 2022 - Elsevier
A segment-based mortar contact discretisation technique for the analysis of hydro-
mechanically coupled dynamic processes with quadratically interpolated finite elements and …

Large-deformation analysis of pile installation with subsequent lateral loading: Sanisand vs. Hypoplasticity

P Staubach, J Machaček, T Wichtmann - Soil Dynamics and Earthquake …, 2021 - Elsevier
The simulation of the installation of open-ended piles using a Coupled Eulerian-Lagrangian
method in conjunction with two sophisticated constitutive soil models, Sanisand and …

Enhancement of a high‐cycle accumulation model by an adaptive strain amplitude and its application to monopile foundations

P Staubach, J Machaček, L Tschirschky… - … for Numerical and …, 2022 - Wiley Online Library
The high‐cycle accumulation (HCA) model by Niemunis et al. allows the prediction of the
mechanical response of sand under millions of load cycles. It has originally been developed …

[PDF][PDF] Contributions to the numerical modelling of pile installation processes and high-cyclic loading of soils

P Staubach - Publications of the Chair of Soil Mechanics …, 2022 - scholar.archive.org
This work presents contributions to the numerical modelling of the installation process and
subsequent high-cyclic loading of piles, such as relevant for pile foundations for offshore …