FATIGUE AND STATIC TESTING OF CONCRETE SLABS
Fully supported concrete slabs (FSS) were constructed and tested under static and cyclic loading in the laboratory. Deflection, strain, and load data were acquired for each slab test. The results of the FSS fatigue tests were plotted as the stress ratio (bending stress in the slab divided by the concrete modulus of rupture) versus the number of cycles to failure. FSS had a resistance to fatigue 30% higher than simply supported beams (SSB). For the same number of cycles to failure, concrete slabs could sustain a stress level 30% higher relative to beams. The concrete modulus of rupture from an SSB was found not representative of the true strength of an FSS. FSS tests under static load had a flexural strength 30% higher than the concrete modulus of rupture from an SSB test configuration. When the actual slab strength under static loading was accounted for in the stress ratio, the fatigue curves for concrete beams and slabs were essentially identical. Strain gauges indicated that plastic deformation in the slab occurred almost immediately with cyclic loading. Strain gauges also showed that partially cracked slabs resisted the load through cantilever action. Deflection measurements showed that crack initiation and propagation occurred in the slab before fatigue failure. Crack propagation through the slab thickness was found to consume most of the slab's fatigue life.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309071097
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1684, Issues in the Design of New and Rehabilitated Pavements.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Roesler, J R
- Barenberg, E J
- Publication Date: 1999
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 71-80
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Serial:
- Transportation Research Record
- Issue Number: 1684
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Beams; Concrete; Deflection; Failure; Fatigue tests; Flexural strength; Laboratory tests; Modulus of rupture; Plastic deformation; Repeated loads; Slabs; Static loads; Strain gages; Stress ratio
- Uncontrolled Terms: Crack propagation; Fully supported slabs; Simply supported beams
- Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;
Filing Info
- Accession Number: 00780230
- Record Type: Publication
- ISBN: 0309071097
- Files: TRIS, TRB, ATRI
- Created Date: Dec 10 1999 12:00AM