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Proof Loads in LRFD Format for Bridge Evaluation

by Gongkang Fu, New York State Dep of Transportation, Albany, United States,
Jianguo Tang, New York State Dep of Transportation, Albany, United States,



Document Type: Proceeding Paper

Part of: Structural Engineering in Natural Hazards Mitigation

Abstract:

Proof load testing is considered as a reliable approach to evaluation of an existing structure's load-carrying capacity. It can be effectively used for highway bridge evaluation, to either enhance an existing rating (by analytical methods) or establish a rating for unratable bridges. This paper proposes proof load factors in LRFD format for highway bridge evaluation, to determine target proof load and load rating. They are derived to reach target structural reliability levels consistent with current practice, assuring relatively uniform safety of bridge structures. These factors may be included in specifications for highway bridge evaluation by proof testing.

Subject Headings: Load tests | Load factors | Load bearing capacity | Highway bridges | Structural reliability | Bridge tests | Load and resistance factor design

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