PROBABILISTIC DESIGN CONCEPTS IN STRUCTURAL SAFETY AND RELIABILITY

Structural reliability and safety concepts have been studied deeply and applied to many civil engineering structures such as buildings, bridges, towers and dams. These concepts have been used successfully in other fields also, principally in aeronautics and aerospace, automobiles, and trains. In naval architecture, little has been done in this area despite the obvious randomness of the variables involved in the design of a marine vehicle, particularly with regard to sea loads. This paper presents a comprehensive probabilistic model for formulating structural design criteria in ships. It covers the overall structural strength of ships under the random sea loads from a probabilistic point of view. A risk measure that accounts for the uncertainties associated with the design variables involved in the structural aspects is described. A method for a systematic analysis of these uncertainties and their effects on the calculated risk is given. The application of the long-term and short-term design criteria on a Mariner ship is illustrated as an example, and compared with the conventional safety factor of the deterministic approach.

• Supplemental Notes:
  • Presented at the Annual Meeting of SNAME in New York, New York, November 16-17, 1972.
• Corporate Authors:

  Society of Naval Architects and Marine Engineers

  601 Pavonia Avenue
  Jersey City, NJ  United States  07306-2907
• Authors:
  • Mansour, A
• Publication Date: 1972

Media Info

• Pagination: 25 p.

Subject/Index Terms

• TRT Terms: Bending moments; Design; Hulls; Loads; Reliability; Structural analysis; Superstructures; Vehicle design; Water waves; Waves
• Uncontrolled Terms: Design criteria; Ship design; Structural reliability
• Old TRIS Terms: Hull superstructure interaction; Wave loads
• Subject Areas: Design; Hydraulics and Hydrology; Marine Transportation;

Filing Info

• Accession Number: 00168448
• Record Type: Publication
• Source Agency: Mansour Engineering, Incorporated
• Report/Paper Numbers: No. 2
• Files: TRIS
• Created Date: Feb 16 1978 12:00AM