This paper presents the definition of lower deck elevation (LDE) of fixed offshore platforms in Mexican part of the Gulf of Mexico (GoM), which were applied in the Mexican code for design and assessment of fixed offshore structures NRF-003-PEMEX-2007. This was obtained as a result of a decision methodology developed here, an optimization algorithm composed of an objective minimization function subject to a safety restriction and by the application of a set of real structural maintenance and equipment replacement costs. Platform projected service life dependent total costs of LDE contemplate expected costs of structural and equipment maintenance after the occurrence of tropical cyclones and northers, and the expected cost of equipment mobilization. This work regards a group of offshore platforms in the Bay of Campeche whose elevation lies between 15.85 and 19.10 m above mean sea level, as well as recent metocean hazard information. Similar expected values of total costs due to maintenance and repair were obtained, while safety constrains demand the LDE not to be less than +19.10 m.
Selection of Design Lower Deck Elevation of Fixed Offshore Platforms for Mexican Code
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received February 24, 2015; final manuscript received July 27, 2015; published online August 21, 2015. Assoc. Editor: Colin Leung.
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Campos, D., Ortega, C., Alamilla, J. L., and Soriano, A. (August 21, 2015). "Selection of Design Lower Deck Elevation of Fixed Offshore Platforms for Mexican Code." ASME. J. Offshore Mech. Arct. Eng. October 2015; 137(5): 051301. https://doi.org/10.1115/1.4031219
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