ABSTRACT
The reliability basis of structural design is progressing steadily over a broad front of harmonization, standardization of reliability principles, implementation in design, upgrading of regional and national design standards, to extended application by various countries. The relationship between the semi-probabilistic design (SP-D) approach that provides the basis for limit states design, and risk- and reliability-based approaches is formulated by the international standard ISO 2394. The draft international standard ISO DIS 22111 acknowledges a degree of equivalence between alternative SP-D formats (partial factor and load and resistance factor design) employed by leading standards internationally. Compliance between SP-D procedures and reliability-based assessment of structural performance is used here to obtain a true evaluation of compliance of these standards to the principles of reliability specified by ISO 2394, as well as a measure of harmonization in standardized practice. The results should assist standards developers in further advancement and implementation of SP-D reliability basis of design procedures.
