... of the nonlinear problem. The main objective is to obtain an accurate and computationally efficient numerical tool for the investigation of the behaviour of three-dimensional frames in general, with special attention on the reassessment of existing fixed platforms for offshore oil exploitation. INTRODUCTION...

... of the more recent regulations to be reconsidered using a risk-based methodology. This approach may be constrained by the original design and operational history and, unlike new installations, the opportunity for any further risk control is limited mainly to improved operational procedures. The reassessment...

... used, and to discuss their associated advantages and disadvantages. Aspects requiring further development are highlighted. INTRODUCTION Wave impact on the topside is a central issue in the need for reassessment of fixed offshore platforms around the world (Gudmestad and Hansen, 2000). This need...

... ABSTRACT Recent developments in reliability analysis to aid structural design and reassessment during use as well as inspection planning are reviewed. Data and methods applied to calculate the probability of ultimate and fatigue failure of structural components and systems, considering...

... ABSTRACT Damaged members, new deck facilities, aging and extending the design life are some examples of problems in the daily life of the existing platforms. In all these cases the structural system strength must be reassessed in order to verify if the requirements with respect...

... ABSTRACT: Reassessment of installations on the UK Continental Shelf is an important control measure in assuring continuing structural integrity. At present this is achieved via the certification process. Risk based regulations have now been introduced requiring a safety case for each...

... 1.0 Abstract: This paper describes in detail the methodology used for the reassessment of offshore installations on the Dutch Continental Shelf. The service life extension of four platforms, operated by Elf Petroland b.v., has formed the basis for the development and implementation...

..., or the functional loads must be reduced. fshorlt strrlst1tuc trondheim increment hydraulic fracturing reassessment load domain strength plasticity deformation shakedown analysis plastic deformation displacement upstream oil & gas design condition cyclic nontlnekr fem skallerud criterion...