Offshore Structures

Abstract

Offshore Structures deployed offshore for oils and gas field development are reviewed and their functional needs defined. Fundamental design requirements for fixed steel structures, in particular, those for jackets and topsides, are spelt out together with the expectations of metocean and geotechnical surveys. Temporary and in-service design requirements, involving appropriate loads and combinations, are defined as well as the demands for structural analysis and materials and welding. Topsides and jacket design needs are presented in some detail and pile and other foundation assessments described. Basic corrosion protection requirements are reviewed.

Conclusion

This paper has provided an overview of some of the key factors that need be considered in the analysis and design of offshore structures. Emphasis has been placed on modelling of the hydrodynamic response of a compliant vertical surface-piercing cylinder in the Morison loading regime under uni-directional waves. Reference has also been made to a number of publications in which further detail and extension of treatment can be explored by the interested reader.