AN APPLICATION OF RELIABILITY FUNCTION MODEL TO ESTIMATE OFFSHORE PLATFORM RISK AT THE EARLY STAGE OF DESIGN

This paper presents a brief review on the concept of a reliability function model for estimating risks of a fixed offshore platform caused by waves and then investigates the influence of some parameters on the reliability, such as pile radius, wall thickness, wave height, design life, and storm-occurrence rate. At the early stage of design, when these parameters still are not determined definitely, a speedy and rough examination of their effects on the structural risk is most desirable for decision-making. For this purpose, the formulation of reliability is approximated to some extent and expressed in function of the parameters in a compact form. Hereby a value of reliability is assumed to be known for a particular reference value of each parameter. A set of reference values may be provided from available data of existing platforms; otherwise, a representative run of calculation is necessary for a starting basis of using this method. In order to illustrate this method, a numerical example for a templated-type steel platform is carried out and its result clearly demonstrates the utility of this method for practical application, especially at the early stage of design.

• Supplemental Notes:
  • 628-7686. See MRIS abstract 21 187094, Maritime Data Network, for information on obtaining Tanker Advisory Center data.
• Corporate Authors:

  Offshore Technology Conference

  6200 North Central Expressway
  Dallas, TX  United States  45206
• Authors:
  • Choi, H S
  • Kappler, H
• Publication Date: 1978

Media Info

• Features: References;
• Pagination: p. 473-483
• Serial:
  • Publication of: Offshore Technology Conference
  • Publisher: Offshore Technology Conference

Subject/Index Terms

• TRT Terms: Deformation curve; Failure; Force; Loads; Offshore platforms; Reliability; Risk analysis; Structural analysis; Structural design; Support piles; Water waves; Wave height; Waves
• Uncontrolled Terms: Structural reliability
• Old TRIS Terms: Failure mode; Offshore platform design; Wave forces on structures; Wave loads
• Subject Areas: Bridges and other structures; Hydraulics and Hydrology; Marine Transportation; Materials;

Filing Info

• Accession Number: 00178166
• Record Type: Publication
• Source Agency: Offshore Technology Conference
• Report/Paper Numbers: OTC 3106, Vol 1 Proceeding
• Files: TRIS
• Created Date: Jul 19 1978 12:00AM