Design: Limit State
Edition: 2007
"Global buckling implies that buckling of pipe as a bar in compression. It is a response to compressive effective axial force and not a failure mode."
Objective
- To prevent global buckling for burried pipelines.
- Allow exposed pipelines to buckle in controlled condition.
Scope
- Design of 10" - 42" rigid pipelines.
- ONLY limited to local bukling check.
- Scenarios covered are exposed pipelines on even seabed and uneven seabed and burried pipelines.
- Trawl interference only limited to lateral buckling.
Design
Effective Force wil be limited to residual lay tension, N after pipeline installation. During operation, temperature and pressure will increase contributed to maxinum compresive/restrained effective force, S0 .
Global buckling will occur if the restrained effective axial force (compression), So reach the initial effective axial force, Seff .
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