Ultimate strength of rigid risers and pipelines for deepwater applications

摘要

Limit state formulations for the ultimate strength of rigid risers and piplelines are eviewed. Existing formulations are compared by assessing strengths for the parameter ranges representative of deepwater conditions. Both stress and strain approches for longitudinal bending are considered and the correlation between them performed through a stress-strain material law. The correlation studies assume loads due to axial tension, longitudinal bending and external pressure acting singly or in pairs.