## A GPU-based micromechanical simulation model for submerged geotechnical problems

- Driven steel piles are commonly used as deep foundations for a wide range of engineering structures, particularly in the offshore branch. They are also an interesting example among the broad spectrum of geotechnical applications where the fluid-solid interaction at the pore-scale can play a major role for the macromechanical behaviour of the whole system. In the context of the geotechnical practice for offshore wind-farm structures, both the industrial design and the actual dimensions of the large piles used as foundations in the seabed are often driven by factors such as the soil resistance to driving (SRD), which are still not well understood and often estimated based on mere empirical correlations or overly simplified one-dimensional models. In particular, the role of the micromechanical effects during the installation process (e.g. local dilatancy or contractancy) and their consequences on the pore pressure levels at the pile-tip and on the effective resistance to driving, areDriven steel piles are commonly used as deep foundations for a wide range of engineering structures, particularly in the offshore branch. They are also an interesting example among the broad spectrum of geotechnical applications where the fluid-solid interaction at the pore-scale can play a major role for the macromechanical behaviour of the whole system. In the context of the geotechnical practice for offshore wind-farm structures, both the industrial design and the actual dimensions of the large piles used as foundations in the seabed are often driven by factors such as the soil resistance to driving (SRD), which are still not well understood and often estimated based on mere empirical correlations or overly simplified one-dimensional models. In particular, the role of the micromechanical effects during the installation process (e.g. local dilatancy or contractancy) and their consequences on the pore pressure levels at the pile-tip and on the effective resistance to driving, are generally either disregarded or at most assumed to be covered by the simplified engineering “black-box” solutions. Here, we propose a general framework to address such local aspects of a geotechnical application involving fluid-saturated soils while retaining the focus on the micro-scale phenomena. We advocate for an approach that combines the relative simplicity of the Discrete Element Method (DEM) for the solid mechanics with the capabilities of the Lattice Boltzmann Method (LBM) for the fluid dynamics. In this sense, we aim to compile some useful techniques and practical recommendations for an efficient GPU-based implementation of a micromechanical LBM-DEM simulation tool.…

Autoren/innen: | Pablo Cuéllar |
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Koautoren/innen: | Z. Benseghier, L.-H. Luu, S. Bonelli, P. Philippe, Matthias Baeßler |

Dokumenttyp: | Vortrag |

Veröffentlichungsform: | Präsentation |

Sprache: | Englisch |

Jahr der Erstveröffentlichung: | 2019 |

Organisationseinheit der BAM: | 7 Bauwerkssicherheit |

7 Bauwerkssicherheit / 7.2 Ingenieurbau | |

DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Angewandte Physik |

Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurbau | |

Freie Schlagwörter: | GPU parallel computation; Micromechanical modelling; Offshore geotechnics |

Themenfelder/Aktivitätsfelder der BAM: | Energie |

Infrastruktur | |

Infrastruktur / Sicherheit und Lebensdauer von Bauwerken | |

Energie / Erneuerbare Energien | |

Veranstaltung: | DEM8, the 8th International Conference on Discrete Element Methods |

Veranstaltungsort: | University Twente, Enschede, The Netherlands |

Beginndatum der Veranstaltung: | 20.07.2019 |

Enddatum der Veranstaltung: | 26.07.2019 |

Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |

Datum der Freischaltung: | 01.08.2019 |

Referierte Publikation: | Nein |