FATIGUE FAILURE MECHANISM OF REINFORCED CONCRETE BRIDGE DECK SLABS
The aim of the paper is to clarify the fatigue failure mechanism of reinforced concrete slabs under moving wheel loads. Seven slabs with full scale dimensions were tested under static load, central pulsating loads, and moving pulsating loads. To investigate deflection characteristic and reserve fatigue strength of cracked slabs subjected to actual traffic loads, especially, four test slabs were were sawn out from two distressed bridge decks. Experimental findings were mainly as follows: rubbing together of crack faces due to the repeatedly moving loads eventually produced a slit with a narrow opening in the cracked section; the formation of the slit reduced both flexural and shearing rigidities of the slab; if rain water were poured into the cracked section, the reductions of these rigidities were remarkably accelerated and caused the slab surface to collapse prematurely. Three-dimensional stress analysis in the vicinities of cracks predicted their penetration through the entire depth of the slab. It was found that the process of the penetration consisted of two stages: the first stage was a growth of flexural cracks occurring at the bottom surface of the slab, beneath the wheel load, and the second stage was a progression of twisting cracks occurring at the top surface, when the wheel load had moved away. /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:
- OKADA, KIYOSHI
- Okamura, Hirokazu
- Sonoda, Keiichiro
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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 136-144
- 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: Bridge decks; Deflection; Failure; Fatigue (Mechanics); Fatigue strength; Fracture mechanics; Reinforced concrete; Stiffness; Stresses; Thinness; Wheel loads
- Uncontrolled Terms: Slenderness ratio
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00183757
- Record Type: Publication
- ISBN: 0309026962
- Files: TRIS, TRB
- Created Date: Dec 3 1978 12:00AM