Wind and Structures

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Reliability analysis of laterally loaded piles for an offshore wind turbine support structure using response surface methodology

  • Kim, Sun B. (Coastal Engineering Division, Korea Institute of Ocean Science and Technology) ;
  • Yoon, Gil L. (Coastal Engineering Division, Korea Institute of Ocean Science and Technology) ;
  • Yi, Jin H. (Coastal Engineering Division, Korea Institute of Ocean Science and Technology) ;
  • Lee, Jun H. (School of Civil and Environmental Engineering, Yonsei University)
  • Received : 2015.09.15
  • Accepted : 2015.11.27
  • Published : 2015.12.25
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Abstract

With an increasing demand of a renewable energy, new offshore wind turbine farms are being planned in some parts of the world. Foundation installation asks a significant cost of the total budget of offshore wind turbine (OWT) projects. Hence, a cost reduction from foundation parts is a key element when a cost-efficient designing of OWT budget. Mono-piles have been largely used, accounting about 78% of existing OWT foundations, because they are considered as a most economical alternative with a relatively shallow-water, less than 30 m of seawater depth. OWT design standards such as IEC, GL, DNV, API, and Eurocode are being developed in a form of reliability based limit state design method. In this paper, reliability analysis using the response surface method (RSM) and numerical simulation technique for an OWT mono-pile foundation were performed to investigate the sensitivities of mono-pile design parameters, and to find practical implications of RSM reliability analysis.

Keywords

Acknowledgement

Grant : Reliability Analysis & Software Development for Offshore Wind Turbine Support Structures

Supported by : Korea Institute of Energy Technology Evaluation & Planning (KETEP), KIOST

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