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Article

Partial Safety Factors and Characteristic Values for Combined Extreme Wind and Wave Load Effects

[+] Author and Article Information
Niels Jacob Tarp-Johansen

Wind Energy Department, Risø National Laboratory, Building 118, P. O. Box 49, Roskilde, DK-4000, Denmark e-mail: niels.jacob.tarp-johansen@risoe.dk

J. Sol. Energy Eng 127(2), 242-252 (Apr 25, 2005) (11 pages) doi:10.1115/1.1862259 History: Received June 29, 2004; Revised November 04, 2004; Online April 25, 2005
Copyright © 2005 by ASME
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References

“Petroleum and Natural Gas Industries—Fixed Steel Offshore Structures,” 2003, ISO/CD 19902, ISO Central Secretariat, Geneva.
“Component-Based Calibration of North West European Annex Environmental Load Factor to ISO Fixed Steel Offshore Structures Code 19902,” 2002, Bomel Ltd, Maidenhead, UK.
Tarp-Johansen, N. J., Madsen, P. H., and Frandsen S. T., 2004, “Partial Safety Factors for Extreme Load Effects in Wind Turbines,” Risø Report No. R-1319(EN), Risø National Laboratory, Roskilde.
Tarp-Johansen, N. J., Madsen, P. H., and Frandsen, S. T., 2003, “Calibration of Partial Safety Factors for Extreme Loads on Wind Turbines,” Proceedings CD-ROM of the European Wind Energy Conference and Exhibition 2003.
Sverre, H., Gran, T. M., and Sagil, G., 1998, “Long Term Response Analysis of Fixed and Floating Structures,” Report No. 98s97*4715, STATOIL, Norway.
“Actions and Action Effects, draft 2 for revision 2,” NORSOK standard N-003, 2004, Standards Norway, Lysaker, Norway, www.standard.no/petroleum
Tarp-Johansen, N. J., 2004, “Storm Profiles for Wind Loads,” Note for IEC WG03, Risø National Laboratory, Roskilde, Denmark.
Tromans, P., 2000, “Extreme Environmental Load Statistics in UK Waters,” Offshore Technology Report No. 2000/066, Health and Safety Executive, UK, ISBN 0 7176 2061 1.
Ersdal G., Sørensen, J. D., and Langen, I., 2003, “Updating of structural failure probability based on experienced wave loading,” Paper No. JSC-386, Proceedings of the 13th International Offshore and Polar Engineering Conference and Exhibition, ISOPE 2003.
Ditlevsen, O., and Madsen, H. O., 1996, Structural Reliability Methods, Wiley, Chichester, Chap. 6.

Figures

Grahic Jump Location
Generic wave storm profile
Grahic Jump Location
ψa and ψh as a function of the relative contribution of the aerodynamic loads to the combined response
Grahic Jump Location
The dependency of β against ε. When ε=0 there is no wave load, and vice versa.

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