Plasticity Detection and Quantification in Monopile Support Structures Due to Axial Impact Loading

Recent developments in the construction of offshore wind turbines have created the need for a method to detect whether a monopile foundation is plastically deformed during the installation procedure. Since measurements at the pile head are difficult to perform, a method based on measurements at a ce...

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Bibliographic Details
Main Authors: Meijers, P.C., Tsouvalas, A., Metrikine, A.V.
Format: Conference Proceeding
Language:English
Subjects:
Constitutive relationships
Deformation mechanisms
Impact loads
Mathematical models
Offshore construction
Plastic deformation
Plastic properties
Wind turbines
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Summary:Recent developments in the construction of offshore wind turbines have created the need for a method to detect whether a monopile foundation is plastically deformed during the installation procedure. Since measurements at the pile head are difficult to perform, a method based on measurements at a certain distance below the pile head is proposed in this work for quantification of the amount of plasticity. By considering a onedimensional rod model with an elastic-perfectly plastic constitutive relation, it is shown that the occurrence of plastic deformation caused by an impact load can be detected from these measurements. Furthermore, this plastic deformation can be quantified by the same measurement with the help of an energy balance. The effectiveness of the proposed method is demonstrated via a numerical example.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/201814815003