The place fuel explosions symbolize a reputable possibility, platform topsides must be designed to resist explosion loading. There are points to think about: first of all loading at the constitution and secondly loading and influence on apparatus. This Technical observe bargains mostly with the 1st point yet can also be correct to the second one as the functionality of the constitution, e.g. deflection and acceleration, impacts the apparatus fastened on it. it's also proper to the evaluate of the power and deformation skill of the apparatus goods themselves, e.g. pipes and vessels. This Technical word covers either layout of recent structures and reassessment of current constructions.
Content:
• entrance topic
• Notation
• desk of Contents
• 1. advent
2. normal concerns
three. functionality criteria
four. enter Loading requisites
five. fabric reaction to Dynamic Loading
6. Structural reaction
7. layout Code exams
eight. Assessing the Adequacy of the constitution on the finish of the Explosion occasion
nine. useful issues
• 10. Reassessment for elevated Loading and Structural Mitigation
• References
Appendices
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Extra info for Explosion Resistant Design of Offshore Structures
Sample text
Limits to Application These curves are only appIicable to beams operating in the elastic range in both the primary and rebound phases. They apply also to continuous beams up to the point where the second (midspan) hinge starts to form. e. 3. O) should be determined For impulses with suction phase area e x d i g 10% of the total positive phase area, the re-rebound DLF's can exceed primary DLF's for members with ~ t ~ rperiods a l close to 2 b. For these cases DLF's are to be determined by timedomain SDOF model.
5 to ensure that the welds will not fail under blast loading. In certain areas it may be appropriate to provide a corrosion allowance as well. Designing for Partial Collapse: Where it is intended that some parts of the platform structure could blow away in extreme explosion events, then the maximum connection strength of the boundaries of the parts that are determined to blow away should be assessed and applied as design loads to the parts that are intended to remain. 5). Page 36 FABIG Technical Note - June 1996 Explosion Resistant Design of Offshore Structures 10.
Another point is that the bending deformations that have occurred should not have led to bending of members that are required to resist axial compression. Subject to taking these aspects into account, the residual strength of the structure will have been little affected by the explosion. If the damage to the structure is more extensive with buckling and joint failures, the residual strength will have been reduced. It will therefore be necessary to make an estimate of the residual strength of the various parts of the structure prior to undertaking a fire response analysis.