Re-Analysis of Run-Up Levels for Slender Monopiles

Karsten Garborg, Thomas Lykke Andersen, Jesper Skourup, Peter Frigaard

Research output: Contribution to journalJournal articleResearchpeer-review


In the present paper, the experimental data on wave run-up on slender monopiles from recently published small and large scale tests are reanalyzed using different methods for the wave analysis. The hypothesis is that the post processing has an impact on the results, due to depth limited and highly nonlinear waves in many of the tests. Thus, the identified maximum waves by a zero-down crossing analysis are highly influenced by the reflection analysis method as well as by bandpass filtering. The stagnation head theory with the run-up coefficient is adopted and new coefficients are presented. The hypothesis is verified, and the applied bandpass filter is identified as a large contributor to conservatism in previous studies, as the steep, nonlinear waves that produce the highest run-up can be heavily distorted by the bandpass filter.
Original languageEnglish
Article number1950002
JournalInternational Journal of Ocean and Coastal Engineering
Issue number01n02
Number of pages29
Publication statusPublished - 2020


  • Wave run-up
  • Vertical circular cylinder
  • Offshore wind turbines
  • service platformdesign
  • small and large scale model tests
  • Wave analysis


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