Integrity management of offshore structures and its implication on computation of structural action effects and resistance

An overview of integrity management of offshore structures, with emphasis on the oil and gas energy sector, is given. Based on relevant accident experiences and means to control the associated risks, accidents are categorized from a technical-physical as well as human and organizational point of view. Structural risk relates to extreme actions as well as structural degradation. Risk mitigation measures, including adequate design criteria, inspection, repair and maintenance as well as quality assurance and control of engineering processes, are briefly outlined. The current status of risk and reliability methodology to aid decisions in the integrity management is briefly reviewed. Finally, the need to balance the uncertainties in data, methods and computational efforts and the cautious use and quality assurance and control in applying high fidelity methods to avoid human errors, is emphasized, and with a plea to develop both high fidelity as well as efficient, simplified methods for design.

[1]  Torgeir Moan.  Development of accidental collapse limit state criteria for offshore structures , 2009 .

[2]  Torgeir Moan,et al.  Stochastic Dynamics of Marine Structures: Index , 2012 .

[3]  Jørgen Amdahl,et al.  Design of offshore structures against accidental ship collisions , 2014 .

[4]  Torgeir Moan,et al.  Fatigue reliability-based assessment of welded joints applying consistent fracture mechanics formulations , 2007 .

[5]  Robert E. Melchers,et al.  Structural Reliability: Analysis and Prediction , 1987 .

[6]  Jan Inge Dalane,et al.  Systems reliability of offshore structures including fatigue and extreme wave loading , 1991 .

[7]  Gerhard Ersdal,et al.  New Standard for Assessment of Structural Integrity for Existing Load-Bearing Structures-Norsok N-006 , 2009 .

[8]  J I Dalane.  SYSTEM RELIABILITY IN DESIGN AND MAINTENANCE OF FIXED OFFSHORE STRUCTURES , 1993 .

[9]  B. Skallerud,et al.  Nonlinear analysis of offshore structures , 2002 .

[10]  Finn Kirkemo,et al.  Applications of Probabilistic Fracture Mechanics to Offshore Structures , 1988 .

[11]  Ian Jordaan,et al.  RATIONALE FOR LOAD SPECIFICATIONS AND LOAD FACTORS IN THE NEW CSA CODE FOR FIXED OFFSHORE STRUCTURES , 1991 .

[12]  Aie.  World Energy Statistics 2016 , 2016 .

[13]  Subrata K. Chakrabarti,et al.  Handbook of Offshore Engineering , 2005 .

[14]  Torgeir Moan,et al.  Probabilistic methods for planning of inspection for fatigue cracks in offshore structures , 2016 .

[15]  Torgeir Moan.  Recent Research and Development Relating to Platform Requalification , 2000 .

[16]  Torgeir Moan.  Reliability-based management of inspection, maintenance and repair of offshore structures , 2005 .