Transcription of Offshore Structural Design - Structural Engineers
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11 Offshore Structural DesignOffshore Structural DesignDetail EngineeringDetail EngineeringFixed PlatformsFixed of Fixed Platforms3 Design of structuresIn-place Phase (Piles, Jacket ,Deck Integral)Three types of analysis are performed: Survival state----- wave/current/wind attack with 50 or 100 years recurrence period. Operational state--- wave/current/wind attack with 1 or 5 years recurrence period, under full operation. Fatigue assessment for Design life. analyses are performed on the complete and intact structure. Assessments at damaged structures, with one member deleted, and assessments of collision situations are occasionally of structures(contd) Majority of Structural analyses are based on the linear theory of elasticity for total system behaviour.
• Cs Slam coefficient (3.5 for tubulars, 5.0 for flat plates) • ρWater density (kg/m3) • In designing the members for wave slam, consideration shall be given to dynamic • amplifications due to wave impact. In this case a minimum dynamic amplification of • 2.0 shall be used in calculating the bending moments at the member ends and ...
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