Publications

Guedes Soares, C., Dogliani, M., Ostergaard, C., Parmentier, G. and Pedersen, P.T. (1996), “Reliability Based Ship Structural Design”, Transactions SNAME, Vol. 104, pp. 357-389

This paper deals with the development of different methods that allow the reliability based design of ship structures to be transferred from the area of research to the systematic application in current design. It summarises the achievements of a three-year collaborative research project dealing with developments of models of load effects and of structural collapse adopted in reliability formulations, which aim at calibrating partial safety factors for ship structural design. New probabilistic models of still-water load effects are developed both for tankers and for containerships. New results are presented of non-linear wave induced load effects and the corresponding long-term formulations. Methods to combine linear and non-linear components of wave induced load effects have been developed and checked by alternative methods. These improved models were used for the reliability assessment of the primary hull structure of several tankers and containerships. The results of the reliability analysis were the basis for the definition of a target safety level which was used to assess the partial safety factors suitable for in a new design rules format to be adopted in modern ship structural design. Finally, recommendations have been produced for the longitudinal strength requirements in the Rules of Classification Societies.

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