Design criteria for offshore structures under combined wind and wave loading

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Journal of Offshore Mechanics and Arctic Engineering

DOI:https://doi.org/10.1115/1.2826986· OSTI ID:31881

Nessim, M A; Hong, H P ^[1]; Swail, V R ^[2]; Henderson, C A ^[3]

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1. Centre for Frontier Engineering Research, Edmonton, Alberta (Canada)
2. Atmospheric Environment Service, Downsview, Ontario (Canada)
3. High Performance Computing Centre, Calgary, Alberta (Canada)

Offshore codes do not give sufficient guidance regarding design criteria for loads resulting from combinations of stochastic environmental processes such as wind and waves. To assist design engineers in defining such criteria, a suite of methods that use environmental data to calculate the probability distributions of load effects resulting from combination of stochastic loads were investigated. An approach has been developed for using the results to calculate structure-specific and generalized load combination criteria. Extensive application of this approach in connection with Environment Canada`s wind and wave data bases for the Canadian East Coast region formed the basis for some interesting conclusions regarding the process of estimating combined extreme loads on offshore structures. It was found that data based on actual measurements of wave height and wind speed are preferable to hindcast data, since the latter have artificially high correlations that lead to overly conservative results. Extremal analyses are most reliable when 20 or more years of data are used with analysis method based on distribution tails.

• Sponsoring Organization: USDOE
• OSTI ID: 31881
• Journal Information: Journal of Offshore Mechanics and Arctic Engineering, Journal Name: Journal of Offshore Mechanics and Arctic Engineering Journal Issue: 1 Vol. 117; ISSN 0892-7219; ISSN JMOEEX
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ATLANTIC OCEAN
CANADA
DESIGN
DYNAMIC LOADS
MATHEMATICAL MODELS
OFFSHORE PLATFORMS
RESPONSE FUNCTIONS
SAFETY STANDARDS
WAVE FORCES
WIND LOADS