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.
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 language | English |
|---|---|
| Pages (from-to) | 93-98 |
| Journal | Civil Engineering Dimension |
| Volume | 19 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 30 Sept 2017 |
Keywords
- brittle
- crack mapping
- diagonal crack
- Ncorr
- shear failure
- strain field