Assessment of probability of failure of steel jacket structures subject to ship collision in offshore Viet Nam
Abstract
The paper presents a reliability approach to assess the impact of ship collision on the existing jacket platforms in the waters of Viet Nam. The approach adopts the limit state concept for boat impact energy and platform structural absorption energy capacity to assess the structural failures. Two boat impact energy spectra, representing the 50th and 95th percentiles of impact energy, are used to determine the probability of platform structural failure. In this paper, the platform structural absorption energy of one representative steel jacket type platform is determined using SACS “Collapse” module based on plasticity for structural members which will subsequently contribute to the loss of global structural stiffness.
The study provides an insight into the maximum boat impact energy for steel jacket type platforms which can be mitigated by other means such as regulation of structural design criteria and marine operations.
References
Ship/platform collision incident database. Prepared by Serco Assurance for the Health and Safety Executive. 2001.
Design against accidental loads. DNV RP C204. 2004.
Charles P.Ellinas. Ultimate strength of damaged tubular bracing members. Journal of Structural Engineering. 1984; 110 (2): p. 245 - 259.
Olav Furnes, Jorgen Amdahl. Ship collision with offshore platforms. Intermaritec 1980.
Jorgen Amdahl, Emst Eberg. Ship collision with offshore structures. Structural Dynamics - EURODYN’93, Moan et al. (eds), ISBN 9054103361. 1993.
Ship collision and capacity of brace members of fixed steel offshore platforms. Prepared by Visser Consultancy for the Health and Safety Executive. 2004.
Wei-liang Jin, Jian Song, Sun-feng Gong, Yong Lu. Evaluation of damage to offshore structures due to collision of large barge. Engineering Structures. 2005; 27: p. 1317 - 1326.
Peng Zheng, Hari Kanegaonkar, Vidar Andre Gjerstad, Eirik Engevik. Transient dynamic effects of jacket - vessel collision on the platform topside. Proceedings of the 13th International Offshore and Polar Engineering Conference, USA. 2003.
JIP-Design against accidental loads. Ch.3 of “Design guidance for structures exposed to ship collision”. Report No. 88 - 3172.
DNV. Guideline for offshore structural reliability analysis-General. Report No. 95 - 2018.
DNV. Risk assessment of pipeline protection. Report No.107. 2001.
HSE. Research Report 053. 2003. 13. API. Recommended practice for planning, designing and constructing fixed offshore platforms - Load and resistance factor design. API RP2A-LRFD Supplement 14. Sacs v5.3 manual.
1. The Author assigns all copyright in and to the article (the Work) to the Petrovietnam Journal, including the right to publish, republish, transmit, sell and distribute the Work in whole or in part in electronic and print editions of the Journal, in all media of expression now known or later developed.
2. By this assignment of copyright to the Petrovietnam Journal, reproduction, posting, transmission, distribution or other use of the Work in whole or in part in any medium by the Author requires a full citation to the Journal, suitable in form and content as follows: title of article, authors’ names, journal title, volume, issue, year, copyright owner as specified in the Journal, DOI number. Links to the final article published on the website of the Journal are encouraged.
