Predicting Installation and Pull-out Behaviour for Offshore Foundations – Large Deformation Finite Elements

Dr Ashley Dyson

Driven foundations are widely used in coastal and offshore projects.  During installation, the penetration of foundations into the seabed results in complex soil-structure interactions that traditional methods of analysis struggle to capture.  Large Deformation Finite Element (LDFE) methods present an alternative approach capable of addressing key factors such as soil heterogeneity, strain rate dependencies, and irregular foundation geometries.  This presentation gives an overview of several recent advances in assessing the performance of offshore foundation structures, namely (1) uncontrolled penetration of large diameter monopiles for offshore wind projects, (2) predicting bearing capacities of unconventional spudcan geometries using back-analyses from CPT-profiles, (3) coupled hydro-geomechanical models for moored, floating structures, and (4) aquaculture systems.

Dr Ashley Dyson Research Fellow in Civil and Geotechnical Engineering School of Engineering, University of Tasmania

Ashley is a Research Fellow in Civil and Geotechnical Engineering at the University of Tasmania’s School of Engineering, whose research focuses on computational and probabilistic geotechnics, particularly in the fields of slope stability, landslides and offshore engineering.    His research seeks to benefit the local Tasmanian community, particularly for debris flow and landslide risk mitigation measures, as well as offshore foundation systems for Tasmanian renewable energy and aquaculture projects. Ashley has published over 50 technical journal and conference papers and currently serves on the ISSMGE technical committee TC304 (Engineering Practice of Risk Assessment and Management).

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