Durchrutschende Grout-Verbindungen in OWEA – Tragverhalten, Instandsetzung und Optimierung

authored by: Peter Schaumann, Stephan Lochte-Holtgreven, Ludger Lohaus, Nick Lindschulte
Abstract: Grouted joints are mainly used for the connection of foundation piles and substructures of offshore wind turbines. Grouted joints consist of tube-to-tube-connections where the annulus is filled with a high performance mortar. Since the early 90s, grouted joints have been installed in offshore wind energy converters with monopiles using plain steel sections with no additional mechanical interlock. During maintenance work vertical slippages have been detected at substructures with monopiles in Denmark, UK and the Netherlands. The movements may result from a loss of bond between steel and mortar. Within this paper the construction and the bearing behaviour of grouted joints is presented. Additionally experimental investigations are shown. Based on own experiences reasons for failure and repair opportunities are introduced and optimisation opportunities for future turbines are proposed.
Organisation(s): Institute of Building Materials Science
Type: Article
Journal: STAHLBAU
Volume: 79
Pages: 637-647
No. of pages: 11
ISSN: 0038-9145
Publication date: 06.09.2010
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Civil and Structural Engineering, Building and Construction, Mechanics of Materials, Mechanical Engineering, Metals and Alloys
Electronic version(s): https://doi.org/10.1002/stab.201001357 (Access: Closed)