[HTML][HTML] Investigation of three sophisticated constitutive soil models: From numerical formulations to element tests and the analysis of vibratory pile driving tests

J Machaček, P Staubach, M Tafili, H Zachert… - Computers and …, 2021 - Elsevier
The performance of three advanced constitutive models has been evaluated based on
element tests and on a comparative study on the simulation of vibratory pile driving tests in …

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 …

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 …

Long-term response of piles to cyclic lateral loading following vibratory and impact driving in water-saturated sand

P Staubach, J Machaček, B Bienen… - Journal of Geotechnical …, 2022 - ascelibrary.org
The influence of the pile installation by vibratory or impact driving on the response to
subsequent cyclic lateral loading, as faced in the offshore environment, is investigated …

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 …

Strain-dependent slope stability for earthquake loading

C Schmüdderich, J Machaček… - Computers and …, 2022 - Elsevier
Assessment of the seismic slope stability in terms of a factor of safety (FoS) is often
addressed using pseudo-static approaches neglecting material-induced failure and the role …

Deep vibratory compaction simulated using a high-cycle accumulation model

P Staubach, I Kimmig, J Machaček, T Wichtmann… - Soil Dynamics and …, 2023 - Elsevier
Deep vibratory compaction (DVC) is an effective ground improvement method for granular
soils in a loose initial state. An efficient numerical approach to simulate the whole process of …

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 …