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Load and Resistance Factors for Bridge Design Code

by Andrzej S. Nowak, (M.ASCE), Univ of Michigan, Ann Arbor, United States,



Document Type: Proceeding Paper

Part of: Structures Congress XII

Abstract:

The paper summarizes the code development procedures used for the new LRFD (load and resistance factor design) bridge code. The current specifications use allowable stresses and/or load factor design. The new code is based on a probability-based approach. Structural performance is measured in terms of the reliability (or probability of failure). Load and resistance factors are derived so that the reliability of bridges designed using the proposed provisions will be at the predefined target level.

Subject Headings: Load and resistance factor design | Dynamic loads | Bridge design | Load bearing capacity | Failure loads | Standards and codes | Structural reliability

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