Development of Bridge Design Code

by Andrzej S. Nowak, Univ of Michigan, United States,

Document Type: Proceeding Paper

Part of: Probabilistic Methods in Civil Engineering


Load and resistance parameters for bridges involve uncertainties due to natural randomness, imperfect models or human errors. Because of these uncertainties, absolute reliability is not an attainable goal. Selection of the optimum reliability level is an economical problem. Lower reliability results in frequent failures, while higher reliability requires more initial costs (materials and labor). Therefore, structural reliability is a convenient acceptability criterion in the development of a design code. The objective of this paper is to present a procedure for calculation of load and resistance factors.

Subject Headings: Load and resistance factor design | Bridge design | Standards and codes | Structural reliability | Load factors | Structural design | Structural analysis | Uncertainty principles

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