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Design of Grouted Connections in Offshore Wind Turbines

 Design of Grouted Connections in Offshore Wind Turbines
Author(s): ,
Presented at IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6-8 May 2013, published in , pp. 410-411
DOI: 10.2749/222137813806501821
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At the widely-used grouted connection for monopile founded offshore wind turbines unexpected settlements have been detected. These findings have led to a withdrawal of the mostly applied design cod...
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Bibliographic Details

Author(s):

Medium: conference paper
Language(s): English
Conference: IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6-8 May 2013
Published in:
Page(s): 410-411 Total no. of pages: 8
Page(s): 410-411
Total no. of pages: 8
Year: 2013
DOI: 10.2749/222137813806501821
Abstract:

At the widely-used grouted connection for monopile founded offshore wind turbines unexpected settlements have been detected. These findings have led to a withdrawal of the mostly applied design code for grouted connections. Without having a valid design guide and under the impression of failing connections alternative designs had to be developed. A review of existing codes shows remarkable differences in the assessment of the capacity of grouted connections. Based on extensive and advanced finite element analyses the structural behaviour of grouted connections is investigated. It becomes obvious that the existing codes can not directly be used for the design of grouted connections for monopile founded offshore wind turbines. Furthermore, a plane cylindrical connection is not appropriate. Cylindrical connections with shear keys or conical connection are alternatives. Approaches for the structural verification of theses types are presented.

Keywords:
fatigue offshore shear key wind turbine grouted joints finite element FE grouted connection monopile