Predicting Fatigue Lifetime from Strain Histograms in an Abbreviated Time Window
This work presents the development of a methodology for estimating the year in which American Association of State Highway and Transportation Officials (AASHTO)-prescribed fatigue lifetime expectations will be reached for a structural detail on a steel highway bridge. The methodology is based upon a year-round strain monitoring program of an ensemble of 24 bridge structures, located on Ohio highways of 8 different functional classes. The data from the strain monitoring program was processed into a normalized temporal representation of the expected accumulation of fatigue damage for the 8 different highway functional classes studied. An algorithm is presented to estimate the annual damage for a particular detail from a site-specific strain histogram, collected over an abbreviated time window. The extrapolation of the short-term histogram to an annual fatigue damage estimate is carried out utilizing the normalized temporal damage accumulation model for the appropriate highway functional class. Sample statistics and probability theory are used to construct confidence intervals associated with the estimate of annual damage. Projected growth rates of traffic volume and/or truck weights can be readily incorporated into the lifetime projection.
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Corporate Authors:
Case Western Reserve University
Department of Civil Engineering, 10900 Euclid Avenue
Cleveland, OH United States 44106-7201Ohio Department of Transportation
1980 West Broad Street
Columbus, OH United States 43223Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Huckelbridge, Arthur
- Metzger, Andrew T
- Publication Date: 2006-12
Language
- English
Media Info
- Media Type: Digital/other
- Features: Appendices; Bibliography; Figures; Maps; Photos; Tables;
- Pagination: 71p
Subject/Index Terms
- TRT Terms: Algorithms; Confidence intervals; Fatigue (Mechanics); Highway bridges; Histograms; Probability theory; Steel; Traffic volume
- Identifier Terms: American Association of State Highway and Transportation Officials
- Uncontrolled Terms: Bridge structures
- Geographic Terms: Ohio
- Subject Areas: Bridges and other structures; Data and Information Technology; Design; Highways; I24: Design of Bridges and Retaining Walls;
Filing Info
- Accession Number: 01051574
- Record Type: Publication
- Report/Paper Numbers: FHWA/OH-2006/26
- Contract Numbers: 134188
- Files: NTL, TRIS, ATRI, USDOT, STATEDOT
- Created Date: May 20 2007 2:38PM