Crack mapping on shear-critical reinforced concrete beams using an open source digital image correlation software

Benny Suryanto, Asdam Tambusay, Priyo Suprobo

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Abstract

Three reinforced concrete beams, one with no shear reinforcement and two others
with shear reinforcement ratios of 0.4% and 1.1%, were tested to investigate the influence of stirrup spacing on the mode of failure, overall strength and ductility. The results show that the beam reinforced with closely-spaced shear reinforcement failed in a ductile manner, whereas the other two beams with large stirrup spacing and no stirrup exhibited only a small measure of ductility and failed in a brittle manner. The importance of the provisions of maximum spacing is highlighted to ensure adequate anchorage for the stirrups and prevent a premature shear failure
to occur. The application of a non-contact monitoring system employing an open source digital image correlation software Ncorr, an ordinary digital camera and a smartphone is demonstrated to provide a visualization of the cracking process throughout the load history.
Original languageEnglish
Pages (from-to)93-98
JournalCivil Engineering Dimension
Volume19
Issue number2
DOIs
Publication statusPublished - 30 Sep 2017

Keywords

  • brittle
  • crack mapping
  • diagonal crack
  • Ncorr
  • shear failure
  • strain field

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