Load and Resistance Factor Design


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Title: Load and Resistance Factor Design

Author(s): Ivan M. Viest

Publication: Special Publication

Volume: 72


Appears on pages(s): 1-16

Keywords: buildings; limit state-design; load factors; loads probability theory, reliability; resistance factors; safety; serviceability; structural design; structural steels.

Date: 12/1/1981

Load and Resistance Factor Design is a major advance toward rational design of steel framed buildings. It combines the limit states of strength and serviceability with a modern probability-based approach to structural reliability. After a historical introduction, the method is defined and a generalized LRFD format developed. The discussion centers on sources of variability in design, on limit states and on probabilistic concepts underlying the numerical values of load and resistance fac-tors. The results of a design evaluation of LRFD are presented and steps are described that are being taken toward future adoption of the method into the AISC Specification.