AN INVESTIGATION OF THE FATIGUE STRENGTH OF DECK SLABS OF COMPOSITE STEEL/CONCRETE BRIDGES
An investigation of the effects of repeated loads on slabs of steel/concrete composite bridges--the most common type in highway construction--was undertaken to supplement static studies conducted under the Ontario Joint Transportation and Communications Research Program No. Q50. The study which involved tests of a number of 1/8th scale direct models of a typical bridge, was aimed at determining endurance limits of the slabs under repeated concentrated loads. Main variables were stress range, and percentage and arrangement of reinforcement. Emphasis was focused on slabs with 0.2 percent top and bottom isotropic reinforcement, this being the amount recommended for use as a result of the static model testing phase of the program. The study showed that the deck slabs of conventionally designed steel/concrete bridges have large reserves of fatigue strength. An endurance limit of 50 percent of the ultimate capacity can be expected in such slabs. In the case of slabs with 0.2 percent isotropic reinforcement, an endurance limit of 40 percent of the ultimate static capacity can be safely adopted for design. These slabs have also performed adequately in static tests; and adoption of their use, where appropriate, would result in considerable reduction of reinforcement requirements in bridge decks. /Author/
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309026962
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Supplemental Notes:
- This paper appeared in Transportation Research Record No. 664, Bridge Engineering, Volume 1. Proceedings of a conference conducted by the Transportation Research Board, September 25-27, 1978. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
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Authors:
- Batchelor, Barrington DeV
- Hewitt, Brian E
- Csagoly, P
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Conference:
- Bridge Engineering Conference, 1st, 1978, St Louis, Missouri, USA
- Location: St Louis Missouri, United States
- Date: 1978-9-25 to 1978-9-28
- Publication Date: 1978
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 153-161
- Monograph Title: Bridge Engineering. Volume 1
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Serial:
- Transportation Research Record
- Issue Number: 664
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Accelerated tests; Bridge decks; Bridge design; Bridges; Concrete; Concrete bridges; Fatigue (Physiological condition); Fatigue strength; Girder bridges; Isotropy; Material reinforcement; Metal bridges; Repeated loads; Slabs; Steel; Steel bridges; Structural design; Thinness
- Uncontrolled Terms: Slenderness ratio
- Old TRIS Terms: Deck girder bridges
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00183759
- Record Type: Publication
- ISBN: 0309026962
- Files: TRIS, TRB
- Created Date: Dec 3 1978 12:00AM