Predictive reliability assessment of suction caissons for moored floating systems

A procedure for assessing the predictive reliability of suction caissons under inclined loads from mooring lines of floating systems is developed. It considers the randomness of the maximum dynamic tension in the mooring lines during extreme sea states. Parameters of the probability distribution of the maximum dynamic line tension are expressed as function of the uncertain extreme sea-state variables employing response surfaces. Line tensions from catenary and taut-leg mooring models are considered for the response surfaces. Reliability analyses are performed at the mudline, so that loading and caisson capacity can be considered statistically independent. Load capacity is modeled using the plastic limit method considering suction caissons in normally consolidated clays and response surfaces for capacity are generated in terms of geotechnical variables. A nested reliability formulation is presented employing an auxiliary limit state function which is solved numerically applying FORM. The influence of geotechnical variables on the predictive failure probability is studied. Also, the effect of accounting for parameter uncertainty in the loading on the reliability assessment of suction caissons is evaluated.

• Record URL:
  https://doi.org/10.1016/j.oceaneng.2014.06.026
• Record URL:
  http://www.sciencedirect.com/science/article/pii/S002980181400239X
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00298018
• Supplemental Notes:
  • Abstract reprinted with permission of Elsevier.
• Authors:
  • Rendón-Conde, Claudia
  • Heredia-Zavoni, Ernesto
• Publication Date: 2014-9-15

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 499-507
• Serial:
  • Ocean Engineering
  • Volume: 88
  • Issue Number: 0
  • Publisher: Pergamon
  • ISSN: 0029-8018
  • EISSN: 1873-5258
  • Serial URL: http://www.sciencedirect.com/science/journal/00298018

Subject/Index Terms

• TRT Terms: Caissons; Floating structures; Offshore moorings; Plastic limit; Random vibration; Reliability; Soil structure interaction; Uncertainty
• Subject Areas: Geotechnology; Marine Transportation; Terminals and Facilities; I21: Planning of Transport Infrastructure; I42: Soil Mechanics;

Filing Info

• Accession Number: 01534866
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 20 2014 3:36PM