Journal
ENGINEERING STRUCTURES
Volume 105, Issue -, Pages 277-288Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2015.10.017
Keywords
Digital image correlation; Reinforced concrete beam; Fatigue; Crack detection
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Funding
- SKANSKA AB
- Sto Scandinavia AB
- Development Fund of the Swedish Construction Industry (SBUF)
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The fatigue behavior of reinforced concrete beams strengthened with externally bonded carbon fiber reinforced polymer (EBR) plates and near-surface mounted (NSM) bars has been investigated using a digital image correlation (DIC) technique. Displacement fields obtained from digital images recorded during specific load cycles in fatigue tests are analyzed to provide information on crack width, beam deflection and curvature, and major principal strains to enable crack detection. The results obtained in this way were compared to data gathered using conventional sensors, revealing that the DIC technique provided very accurate and detailed information, which is not possible to obtain using conventional techniques. The experimental results for plate-strengthened, bar-strengthened and unstrengthened beams are discussed. (C) 2015 Elsevier Ltd. All rights reserved.
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