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Remaining Fatigue Life Estimates Using LRFD
A procedure for evaluating the remaining fatigue life of in-service bridges is included in the Manual for Condition Evaluation and Load and Resistance Factor Rating of Highway Bridges, which was developed in NCHRP Project 12-46. This procedure and other parts of the Manual have been under review and testing by transportation departments in volunteer states since early 1999. The goal of the paper presented here is to provide an introduction to this new procedure. The fatigue life evaluation procedure contained in the Manual follows very closely with the design methodology contained in the AASHTO LRFD Bridge Design Specifications. This makes the procedure up-to-date and should make it easy to use as bridge engineers become more familiar with AASHTO LRFD. The procedure is very similar to the method presented in NCHRP Report 299, which was incorporated into AASHTO's Guide Specifications for Fatigue Evaluation of Existing Steel Bridges. As a result, the procedure provides an estimate of remaining life that is based on calculated applied stress ranges of realistic magnitude instead of excessively high stress ranges used for design under the AASHTO Standard Specifications for Highway Bridges.
Remaining Fatigue Life Estimates Using LRFD
A procedure for evaluating the remaining fatigue life of in-service bridges is included in the Manual for Condition Evaluation and Load and Resistance Factor Rating of Highway Bridges, which was developed in NCHRP Project 12-46. This procedure and other parts of the Manual have been under review and testing by transportation departments in volunteer states since early 1999. The goal of the paper presented here is to provide an introduction to this new procedure. The fatigue life evaluation procedure contained in the Manual follows very closely with the design methodology contained in the AASHTO LRFD Bridge Design Specifications. This makes the procedure up-to-date and should make it easy to use as bridge engineers become more familiar with AASHTO LRFD. The procedure is very similar to the method presented in NCHRP Report 299, which was incorporated into AASHTO's Guide Specifications for Fatigue Evaluation of Existing Steel Bridges. As a result, the procedure provides an estimate of remaining life that is based on calculated applied stress ranges of realistic magnitude instead of excessively high stress ranges used for design under the AASHTO Standard Specifications for Highway Bridges.
Remaining Fatigue Life Estimates Using LRFD
Stallings, J. Michael (author) / Franklin, Stephen B. (author)
Structures Congress 2000 ; 2000 ; Philadelphia, Pennsylvania, United States
2000-04-27
Conference paper
Electronic Resource
English
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