Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Lateral static stiffness of offshore monopile socketed in soft rock
https://orcid.org/0000-0003-4529-3532
https://orcid.org/0000-0001-6092-7615
Abstract Monopiles supporting offshore wind turbines (OWTs) sometimes need to be socketed in soft rocks. The lateral stiffness of piles plays a governing role on the fatigue limit state (FLS) and service limit state (SLS) of OWTs, so it needs to be further investigated. In this paper, laboratory-scale model tests and corresponding numerical analyses have been carried out to quantitatively evaluate the lateral static stiffness of monopiles in soft rocks under different scenarios. The results of pile responses, soil/rock resistance and the corresponding p-y curves are presented. Based on the experimental and numerical results, it is found that the load-sharing mechanisms of monopiles are significantly influenced by the rock-bearing layer. For modelling of rock-socked piles, p-y curves obtained by global curve fitting poorly describe the soil/rock resistance near the soil-rock interface, while p-y curves obtained by piecewise fitting for soil and rock layers or three-dimensional finite element model should be the preferred and recommended choices.
Highlights Lateral stiffness of monopile socketed in soft rock is studied. The problem is studied by laboratory tests and FEM models. Similar materials are used in the tests to model the soft rocks. Pile responses, soil resistances and p-y curves are presented. Load sharing mechanism of monopile is significantly affected by soft rock layer.
Lateral static stiffness of offshore monopile socketed in soft rock
https://orcid.org/0000-0003-4529-3532
https://orcid.org/0000-0001-6092-7615
Abstract Monopiles supporting offshore wind turbines (OWTs) sometimes need to be socketed in soft rocks. The lateral stiffness of piles plays a governing role on the fatigue limit state (FLS) and service limit state (SLS) of OWTs, so it needs to be further investigated. In this paper, laboratory-scale model tests and corresponding numerical analyses have been carried out to quantitatively evaluate the lateral static stiffness of monopiles in soft rocks under different scenarios. The results of pile responses, soil/rock resistance and the corresponding p-y curves are presented. Based on the experimental and numerical results, it is found that the load-sharing mechanisms of monopiles are significantly influenced by the rock-bearing layer. For modelling of rock-socked piles, p-y curves obtained by global curve fitting poorly describe the soil/rock resistance near the soil-rock interface, while p-y curves obtained by piecewise fitting for soil and rock layers or three-dimensional finite element model should be the preferred and recommended choices.
Highlights Lateral stiffness of monopile socketed in soft rock is studied. The problem is studied by laboratory tests and FEM models. Similar materials are used in the tests to model the soft rocks. Pile responses, soil resistances and p-y curves are presented. Load sharing mechanism of monopile is significantly affected by soft rock layer.
Lateral static stiffness of offshore monopile socketed in soft rock
https://orcid.org/0000-0003-4529-3532
https://orcid.org/0000-0001-6092-7615
Abstract Monopiles supporting offshore wind turbines (OWTs) sometimes need to be socketed in soft rocks. The lateral stiffness of piles plays a governing role on the fatigue limit state (FLS) and service limit state (SLS) of OWTs, so it needs to be further investigated. In this paper, laboratory-scale model tests and corresponding numerical analyses have been carried out to quantitatively evaluate the lateral static stiffness of monopiles in soft rocks under different scenarios. The results of pile responses, soil/rock resistance and the corresponding p-y curves are presented. Based on the experimental and numerical results, it is found that the load-sharing mechanisms of monopiles are significantly influenced by the rock-bearing layer. For modelling of rock-socked piles, p-y curves obtained by global curve fitting poorly describe the soil/rock resistance near the soil-rock interface, while p-y curves obtained by piecewise fitting for soil and rock layers or three-dimensional finite element model should be the preferred and recommended choices.
Highlights Lateral stiffness of monopile socketed in soft rock is studied. The problem is studied by laboratory tests and FEM models. Similar materials are used in the tests to model the soft rocks. Pile responses, soil resistances and p-y curves are presented. Load sharing mechanism of monopile is significantly affected by soft rock layer.
Lateral static stiffness of offshore monopile socketed in soft rock
Marine Structures ; 86
04.08.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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