Affiliations: University of Minnesota, Minneapolis, MN, USA
Note:  Corresponding author. T.V. Galambos, University of Minnesota, Minneapolis, MN, USA. E-mail: [email protected]
Abstract: This paper is a review of the history of inelastic design criteria for steel girder bridges. The AASHTO Specification's evolution from Working Stress Design (WSD) to Load Factor Design (LFD) to Load and Resistance Factor Design (LRFD) will be the connecting thread of the paper. The author has been involved in some way in much of the research that is behind the inelastic design criteria in the AISC and the AASHTO steel specifications. Brief accounts will be given of the theoretical and experimental background for the inelastic provisions in the LFD and LRFD methods for girder bridge design. The background and the implementation of the “Auto-Stress” method will be discussed.