This article describes a series of model tests conducted to examine extreme wave events associated with tropical cyclonic conditions and their impacts on an offshore deck structure. Extreme waves of a representative cyclonic sea state were examined in a towing tank within long-crested irregular wave trains. Experimental results presented include global forces and localised slamming pressures acting on a rigidly mounted box-shaped deck, which represents a simplified topside structure of a tension leg platform. The effect of static set-down on the still-water air gap was investigated by applying an equivalent reduction for the deck clearance. It was found that a small reduction of 20 mm (2.5 m full scale) in the original deck clearance can lead to a doubling of the magnitude of the horizontal force and the vertical upward-directed force components, as well as significantly increased slamming pressures in many locations on the deck underside.
American Bureau of Shipping (ABS). Rules for building and classing: floating production installation. Houston, TX: ABS, 2014.
2.
American Petroleum Institute (API). Recommended practice for planning, designing and constructing fixed offshore platforms – working stress design (2A-WSD, 2007). Washington, DC: API, 2007.
3.
KaiserMJYuYJablonowskiCJ. Modeling lost production from destroyed platforms in the 2004–2005 Gulf of Mexico hurricane seasons. Energy2009; 34: 1156–1171.
4.
McBrideJL. The estimated cost of tropical cyclone impacts in Western Australia: a technical report for the Indian Ocean Climate Initiative (IOCI) stage 3 (Project 2.2: tropical cyclones in the north west). Melbourne, VIC, Australia: Bureau of Meteorology (BOM), 2012.
5.
LeeS-KYuKHuangSC. CFD study of air-gap and wave impact load on semisubmersible under hurricane conditions. In: Proceedings of the ASME 33rd international conference on ocean, offshore and Arctic engineering (OMAE), San Francisco, CA, 8–13 June 2014. New York: ASME.
6.
SchellinTJahnkeTKunzelJ. Consideration of freak waves for design of a jack-up structure. In: Proceedings of the offshore technology conference, Houston, TX, 30 April–3 May 2007. Houston, TX: Offshore Technology Conference.
7.
National Offshore Petroleum Safety and Environmental Management Authority (NOPSEMA). Annual report by National Offshore Petroleum Safety and Environmental Management Authority. Perth WA 6001, Australia: NOPSEMA, 2013.
8.
NezamianAAltmannJ. An oil field structural integrity assessment for re-qualification and life extension. In: Proceedings of the ASME 32nd international conference on ocean, offshore and Arctic engineering (OMAE), Nantes, 9–14 June 2013. New York: ASME.
9.
O’ConnorPBucknellJDeFrancoS. Structural integrity management (SIM) of offshore facilities. In: Proceedings of the offshore technology conference (OTC 17545), Houston, TX, 2–5 May 2005. Houston, TX: Offshore Technology Conference.
10.
NaessAGaidaiO. Extreme value statistics of non-Gaussian random wave fields and the airgap problem for offshore platforms. In: Proceedings of the 8th international conference on structural dynamics (EURODYN 2011), Leuven, 4–6 July 2011. Leuven, Belgium: Katholieke Universiteit.
11.
MansourAGordonBJLingQ. TLP survivability against progressive failure of tendon and foundation systems in offshore Western Australian harsh environment. In: Proceedings of the ASME 32nd international conference on ocean, offshore and Arctic engineering (OMAE), Nantes, 9–14 June 2013. New York: ASME.
12.
Bureau of Meteorology (BOM). Report on cyclone Orson April 1989/Bureau of Meteorology. Melbourne, VIC, Australia: BOM, 1992.
13.
BuchanSBlackPCohenR. The impact of tropical cyclone Olivia on Australia’s Northwest Shelf. In: Proceedings of the offshore technology conference, Houston, TX, 3–6 May 1999. Houston, TX: Offshore Technology Conference.
14.
RaaijKV. Dynamic behaviour of jackets exposed to wave-in-deck forces. Stavanger: Mechanical and Structural Engineering and Materials Science, University of Stavanger, 2005.
15.
ScharnkeJVestbostadTWildeJD. Wave-in-deck impact load measurements on a fixed platform deck. In: Proceedings of the ASME 33rd international conference on ocean, offshore and Arctic engineering (OMAE), San Francisco, CA, 8–13 June 2014. New York: ASME.
16.
BroughtonPHornE. Ekofisk platform 2/4C: re-analysis due to subsidence. P I Civil Eng1987; 82: 949–979.
17.
WinsorF. Evaluation of methods to remove inertial force from measured model wave impact force signals. Ocean Eng2002; 30: 47–84.
18.
HirdarisSEBaiWDessiD. Loads for use in the design of ships and offshore structures. Ocean Eng2014; 78: 131–174.
19.
El GhamryO. Uplift forces on platform decks. In: Proceedings of the offshore technology conference, Dallas, TX, 19–21 April 1971, pp.537–548. Houston, TX: Offshore Technology Conference.
20.
SchellinTEPerićMEl MoctarO. Wave-in-deck load analysis for a jack-up platform. J Offshore Mech Arct2011; 133: 021303.
21.
DingZRenBWangY. Experimental study of unidirectional irregular wave slamming on the three-dimensional structure in the splash zone. Ocean Eng2008; 35: 1637–1646.
22.
RenBWangY. Experimental study of irregular wave impact on structures in the splash zone. Ocean Eng2003; 30: 2363–2377.
23.
IwanowskiBLefrancMWemmenhoveR. CFD simulation of wave run-up on a semi-submersible and comparison with experiment. In: Proceedings of the ASME 28th international conference on ocean, offshore and Arctic engineering (OMAE), Honolulu, HI, 31 May–5 June 2009. New York: ASME.
24.
AlmelandIGaulTPettersenD. Snorre TLP configuration and analysis technology. In: Proceedings of the offshore technology conference, Houston, TX, 6–9 May 1991. Houston, TX: Offshore Technology Conference.
25.
AbdussamieNThomasGAminW. Wave-in-deck forces on fixed horizontal decks of offshore platforms. In: Proceedings of the ASME 33rd international conference on ocean, offshore and Arctic engineering (OMAE), San Francisco, CA, 8–13 June 2014. New York: ASME.
26.
AbdussamieNAminWOjedaR. Irregular wave generation and assessment of static air gap of offshore structures. In: Proceedings of the 19th Australasian fluid mechanics conference, Melbourne, VIC, Australia, 8–11 December 2014. Victoria 3800, Australia: AFMS.
27.
OlagnonMNerzicRPrevostoM. Extreme water level from joint distributions of tide, surge and crests: a case study. In: Proceedings of the international offshore polar engineering conference, Brest, 30 May–4 June 1999, pp.95–100. Cupertino, CA: ISOPE.
28.
AbdussamieNAminWOjedaR. Vertical wave-in-deck loading and pressure distribution on fixed horizontal decks of offshore platforms. In: Proceedings of the 24th international offshore and polar engineering, Busan, South Korea, 15–20 June 2014. Cupertino, CA: ISOPE.
29.
Det Norske Veritas (DNV). Recommended practice DNV-RP-C205: environmental conditions and environmental loads. Høvik: DNV, 2010.
30.
ChakrabartiS. Handbook of offshore engineering. Oxford: Elsevier Publications, 2005.
Van DijkRVan den BoomH. Full scale monitoring Marco Polo tension leg platform. In: Proceedings of the ASME 2007 26th international conference on offshore mechanics and Arctic engineering (OMAE), San Diego, CA, 10–15 June 2007, pp.915–921. New York: ASME.
33.
KaplanPMurrayJYuW. Theoretical analysis of wave impact forces on platform deck structures. In: Proceedings of the ASME 14th international conference on ocean, offshore and Arctic engineering (OMAE), Copenhagen, Denmark, 18–22 June 1995. New York: ASME.
34.
BaarholmR. Experimental and theoretical study of three-dimensional effects on vertical wave-in-deck forces. In: Proceedings of the ASME 28th international conference on ocean, offshore and Arctic engineering (OMAE), Honolulu, HI, 31 May–5 June 2009. New York: ASME.
35.
OberliesRKhalifaJHuangJ. Determination of wave impact loads for the Hebron gravity based structure (GBS). In: Proceedings of the ASME 33rd international conference on ocean, offshore and Arctic engineering (OMAE), San Francisco, CA, 8–13 June 2014. New York: ASME.
36.
BhatSS. Wave slamming on a horizontal plate. MSc Thesis, Civil Engineering, University of British Columbia, Vancouver, BC, Canada, 1994.
37.
MurrayJWinsoFKaplanP. Impact forces on a jacket deck in regular waves and irregular wave groups. In: Proceedings of the offshore technology conference, Houston, TX, 5–8 May 1997. Houston, TX: Offshore Technology Conference.
38.
CookerM. The interaction between steep water waves and coastal structures. PhD Thesis, University of Bristol, Bristol, 1990.
39.
International Organization for Standardization (ISO). Petroleum and natural gas industries – fixed steel offshore structures (ISO 19902). Geneva: ISO, 2007.
