Inelastic Bridge Rating Procedures for Steel-Girder Bridges

by Michael G. Barker, Univ of Missouri-Columbia, Columbia, United States,
Burl E. Dishongh, Univ of Missouri-Columbia, Columbia, United States,

Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation


Current bridge rating procedures for steel beam and girder bridges ignore the ability of the structure to redistribute forces both longitudinally and laterally. When rating steel bridges with these methods, very conservative estimates of the load carrying capacity of the structures result. Additionally, these conservative ratings produce nonuniform levels of safety among structures within the bridge inventory. This paper presents and discusses bridge rating methods which take advantage of the inelastic reserve capacity of steel girder bridges.

Subject Headings: Girder bridges | Steel structures | Inelasticity | Ratings | Steel bridges | Steel beams | Structural safety | Load bearing capacity

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