Head of Chair

P. Staubach: Hydro-mechanically coupled CEL analyses with effective contact stresses. International Journal for Numerical and Analytical Methods in Geomechanics 48:2207–2215, 2024. doi.org/10.1002/nag.3725

P. Staubach, D. Wegener, J. Machaček, T. Wichtmann: Long-term settlement of dynamically loaded shallow foundations. International Journal of Geomechanics 24(6):04024099, 2024. doi.org/10.1061/IJGNAI.GMENG-8977

P. Staubach, J. Machaček:  Spatially mixed implicit-explicit schemes in hydro-mechanically coupled soil dynamics. Computers and Geotechnics, 2024. doi.org/10.1016/j.compgeo.2024.106811

P. Staubach, L. Knittel, T. Wichtmann: Complex high-cyclic loading in an accumulation model for sand. International Journal for Numerical and Analytical Methods in Geomechanics, 2024. doi.org/10.1002/nag.3871

M. Tafili, P. Staubach, J. Machaček, H. Zachert, T. Wichtmann: Predictive abilities of constitutive models for clay under monotonic and cyclic loading: element tests and centrifuge experiments. Géotechnique, 2024, doi.org/10.1680/jgeot.23.00268

P. Staubach, L. Tschirschky, J. Machaček, T. Wichtmann: Monopile installation in clay and subsequent response to millions of lateral load cycles. Computers and Geotechnics 155:105221, 2023. doi.org/10.1016/j.compgeo.2022.105221

P. Staubach, I. Kimmig, J. Machaček, T. Wichtmann, Th. Triantafyllidis: Deep vibratory compaction simulated using a high-cycle accumulation model. Soil Dynamics and Earthquake Engineering 166:107763, 2023. doi.org/10.1016/j.soildyn.2023.107763

P. Staubach, J. Machaček: Separating fluid and solid contact constraints for hydro-mechanically coupled finite elements discretising fluid displacement. Computer Methods in Applied Mechanics and Engineering 417:116451, 2023. doi.org/10.1016/j.cma.2023.116451

J. Machaček, W. Fuentes, P. Staubach, H. Zachert, T. Wichtmann, Th. Triantafyllidis: A Theory of Porous Media for unsaturated soils with residual water and occluded air. Computers and Geotechnics 157, 2023. doi.org/10.1016/j.compgeo.2023.105324

P. Staubach: Zur numerischen Modellierung der Pfahlinstallation, Pfahl-Symposium 2023, Mitteilung des Instituts für Geomechanik und Geotechnik Technische Universität Braunschweig Heft 113, 45-75, 2023

P. Staubach, I. Kimmig, J. Machaček, T. Wichtmann, Th. Triantafyllidis: Reply to the discussion by V. Osinov et al. on “Deep vibratory compaction simulated using a high-cycle accumulation model” [Soil Dyn Earthq Eng 2023; 166: 107763], Soil Dynamics and Earthquake Engineering 171:107944, 2023. doi.org/10.1016/j.soildyn.2023.107944.

T. Wichtmann, M. Tafili, P. Staubach, J. Machaček: Soil behaviour under cyclic loading – experiments, constitutive modelling and numerical applications. Keynote lecture at the 10th European Conference on Numerical Methods in Geotechnical Engineering, London, 2023. doi.org/10.53243/NUMGE2023-435

J. Machaček, P. Staubach: One-point integrated hourglass-enhanced u-U elements with mortar fluid-phase contact and Sanisand interface. 10th European Conference on Numerical Methods in Geotechnical Engineering, London, 2023. doi.org/10.53243/NUMGE2023-168

J. Machaček, P. Staubach: Entwicklungen in der numerischen Modellierung geotechnischer Randwertprobleme: Automatische Parameterkalibrierung, erdbebeninduzierte Verflüssigung und Ausziehwiderstand von Verpressankern. Bautechnik 100, 2023.  doi.org/10.1002/bate.202300060

T. Wichtmann, M. Tafili, P. Staubach, J. Machaček, Christoph Schmüdderich, Wolfgang Lieske: Perspectives, demands and challenges of future research in Soil Mechanics and Soil Dynamics. Herausforderungen in der Geotechnik - 25 Jahre Institut für Geotechnik und Baubetrieb, Technische Universität Hamburg, 2023

D. Wegener, P. Staubach, J. Machaček, T. Wichtmann: Ermittlung bleibender Bodenverformungen von dynamisch belasteten Flachgründungen, 17. Hans Lorenz Symposium, Berlin

P. Staubach, M. Martinelli: MPM vs. CEL: Numerical modelling of penetration processes, Symposium on Energy Geotechnics: Accelerating the energy transition, Delft, Netherlands, 2023.  doi.org/10.59490/seg.2023.600

P. Staubach, J. Machaček, M. Tafili, T. Wichtmann: A high-cycle accumulation model for clay and its application to monopile foundations, Acta Geotechnica 17:677–698, 2022, doi.org/10.1007/s11440-021-01446-9

P. Staubach, J. Machaček, T. Wichtmann: Novel approach to apply existing constitutive soil models to the modelling of interfaces, International Journal for Numerical and Analytical Methods in Geomechanics 46(7):1241–1271, 2022, doi.org/10.1002/nag.3344

P. Staubach, J. Machaček, T. Wichtmann: Mortar contact discretisation methods incorporating interface models based on Hypoplasticity and Sanisand: application to vibratory pile driving, Computers and Geotechnics 146:104677, 2022, doi.org/10.1016/j.compgeo.2022.104677

P. Staubach, J. Machaček, B. Bienen, T. Wichtmann: Long-term response of piles to cyclic lateral loading following vibratory and impact driving in water-saturated sand, Journal of Geotechnical and Geoenvironmental Engineering 148:11, 2022, doi.org/10.1061/(ASCE)GT.1943-5606.0002906

J. Machaček, P. Staubach, C. Grandas, T. Wichtmann, H. Zachert: On the automatic parameter calibration of a hypoplastic soil model, Acta Geotechnica, doi.org/10.1007/s11440-022-01669-4

P. Staubach, J. Machaček, L. Rentzsch, T. Wichtmann: Impact of the installation process on piles subjected to lateral high-cyclic loading: back-analysis of model tests using a high-cycle accumulation model, Proceedings of the 7th International Young Geotechnical Engineers Conference, Sydney, Australian Geomechanics Society, 2022, 485–490

P. Staubach, J. Machaček, T. Wichtmann: Impact of the constitutive contact model on the simulation of model tests on monopiles with high-cyclic loading. Proceedings of the 20th International Conference on Soil Mechanics and Geotechnical Engineering, Sydney, Australian Geomechanics Society, 2022, 2685-2690

P. Staubach, J. Machaček: Langzeitverhalten von hochzyklisch beanspruchten Pfahlgründungen unter Berücksichtigung des Installationsprozesses. 37. Baugrundtagung, DGGT, 2022, https://dggt.de/images/bgt2022-S1.pdf

J. Machaček, S. Siegel, P. Staubach, H. Zachert: Automatic parameter calibration of two advanced constitutive models. Proceedings of the 16th International Conference of IACMAG Vol. 3, Challenges and Innovations in Geomechanics (Springer), doi.org/10.1007/978-3-031-12851-6_1, 2022

J. Machaček, F. Brosz, P. Staubach, T. Wichtmann, H. Zachert: Back-calculations of centrifuge tests on pile groups subjected to high-cyclic loading. DFI-EFFC International Conference on Deep Foundations and Ground Improvement: Smart Construction for the Future, 2022, 534-544

C. Schmüdderich, J. Machaček, F. Prada, P. Staubach, T. Wichtmann: Strain-dependent slope stability for earthquake loading. Computers and Geotechnics, 105048, 2022, doi.org/10.1016/j.compgeo.2022.105048.

T. Wichtmann, M. Tafili, J. Machaček, P. Staubach, F. Prada: Influence of the constitutive model on the prediction of the long-term behaviour of monopiles in sand. Workshop Numerische Methoden in der Geotechnik, Hamburg, 2022, 10.15480/882.4607

P. Staubach: Contributions to the numerical modelling of pile installation processes and high-cyclic loading of soils, Schriftenreihe des Lehrstuhls für Bodenmechanik, Grundbau und Umweltgeotechnik, Ruhr-Universität Bochum, Heft 73, 2022, Dissertation, link

P. Staubach, J. Machaček, J. Skowronek, T. Wichtmann: Vibratory pile driving in water-saturated sand: Back-analysis of model tests using a hydro-mechanically coupled CEL method, Soils and Foundations, 2021, ISSN 0038-0806, doi.org/10.1016/j.sandf.2020.11.005

P. Staubach, J. Machaček, R. Sharif, T. Wichtmann: Back-analysis of model tests on piles in sand subjected to long-term lateral cyclic loading: Impact of the pile installation and application of the HCA model, Computers and Geotechnics, Volume 134, 104018, 2021, ISSN 0266-352X, doi.org/10.1016/j.compgeo.2021.104018

J. Machaček, P. Staubach: numgeo: A finite-element program for the simulation of hydro-mechanically coupled geotechnical processes. Fachsektionstagung Geotechnik, 2021. Deutsche Gesellschaft für Geotechnik e.V. (DGGT). https://www.numgeo.de/wp-content/uploads/2021/04/20210417_MachacekStaubach_FSTB2021.pdf

J. Machaček, P. Staubach, M. Tafili, H. Zachert, T. Wichtmann: Investigation of three sophisticated constitutive soil models: From numerical formulations to element tests and the analysis of vibratory pile driving tests, Computers and Geotechnics, Volume 138, 104276, 2021, ISSN 0266-352X, doi.org/10.1016/j.compgeo.2021.104276

P. Staubach, J. Machaček, T. Wichtmann: Large-deformation analysis of pile installation with subsequent lateral loading: Sanisand vs. Hypoplasticity. Soil Dynamics and Earthquake Engineering, Volume 151, 2021, ISSN 0267-7261, doi.org/10.1016/j.soildyn.2021.106964

P. Staubach, J. Machaček, L. Tschirschky, T. Wichtmann: Enhancement of a high-cycle accumulation model by an adaptive strain amplitude and its application to monopile foundations, International Journal for Numerical and Analytical Methods in Geomechanics, Volume 46, Issue 2, Pages 315–338, 2021, ISSN 1096-9853, doi.org/10.1002/nag.3301

P. Staubach, T. Wichtmann: Long-term deformations of monopile foundations for offshore wind turbines studied with a high-cycle accumulation model. Computers and Geotechnics, Volume 124, 2020, ISSN 0266-352X, doi.org/10.1016/j.compgeo.2020.103553

P. Staubach, J. Machaček, M.C. Moscoso, T. Wichtmann: Impact of the installation on the long-term cyclic behaviour of piles in sand: a numerical study. Soil Dynamics and Earthquake Engineering, Volume 138, 2020, ISSN 0267-7261, doi.org/10.1016/j.soildyn.2020.106223

P. Staubach, J. Machaček, T. Wichtmann: Impact of the installation on the long-term behaviour of offshore wind turbine pile foundations. 4th International Symposium on Frontiers in Offshore Geotechnics

P. Staubach, J. Machaček, T. Wichtmann: Validierung eines hochzyklischen Akkumulationsmodells anhand von Modellversuchen an Monopiles mit einer großen Anzahl an Belastungszyklen. Leipziger Kolloquium „Forschung in der Geotechnik”. Leipzig, https://nbn-resolving.org/urn:nbn:de:bsz:l189-qucosa2-715365

P. Staubach, J. Machaček: Influence of relative acceleration in saturated sand - Analytical approach and simulation of vibratory pile driving tests. Computers and Geotechnics, Volume 112, 2019, Pages 173-184, ISSN 0266-352X,  doi.org/10.1016/j.compgeo.2019.03.027

P. Staubach, J. Machaček: Einfluss der Relativbeschleunigung bei dynamischer Beanspruchung von Mehrphasenmedien am Beispiel der Vibrationsrammung. Fachsektionstage Geotechnik Würzburg, 2019, Pages 340-345, www.researchgate.net/publication/337011185_Einfluss_der_Relativbeschleunigung_bei_dynamischer_Beanspruchung_von_Mehrphasenmedien_am_Beispiel_der_Vibrationsrammung