Reliability-based safety factors for flexible risers

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:194316

Leira, B J ^[1]; Mathisen, J ^[2]

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1. SINTEF Structures and Concrete, Trondheim (Norway)
2. DnV Industry, Hoevik (Norway)

The present paper summarizes findings from reliability analyses of four different flexible riser configurations. The analysis framework and statistical description of the input parameters are essentially the same for all the configurations. For the Ultimate Limit State, combined load effects at the upper end of the risers are considered. For two of the configurations, the Fatigue Limit State is also analyzed for the same cross-sections. Failure probabilities are reported as well as statistical properties of load effects, capacities and fatigue lifetimes. Relations between safety factors and failure probabilities are investigated. Calibration of safety factors is discussed, and relevant values based on the four case studies are established.

• OSTI ID: 194316
• Report Number(s): CONF-950695--; ISBN 0-7918-1308-8
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DESIGN
FAILURE MODE ANALYSIS
MARINE RISERS
OFFSHORE PLATFORMS
RESPONSE FUNCTIONS
SAFETY STANDARDS
WAVE FORCES