Crack Mapping on Shear-critical Reinforced Concrete Beams using an Open Source Digital Image Correlation Software

Authors

  • Benny Suryanto
  • Asdam Tambusay
  • Priyo Suprobo

DOI:

https://doi.org/10.9744/ced.19.2.93-98

Keywords:

Brittle, crack mapping, diagonal crack, Ncorr, shear failure, strain field.

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 the 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.

References

1. Maekawa, K., Okamura, H., and Pimanmas, A., Nonlinear Mechanics of Reinforced Concrete, CRC Press, London, 2003. [CrossRef]

Kani, G., How Safe are Our Large Reinforced Concrete Beams?, ACI Journal Proceedings, 64(3), 1967, pp. 128–141. [CrossRef]

Anderson, B.G., Rigid Frame Failures, ACI Journal, 53(1), 1957, pp. 625–636. [CrossRef]

An, X., Shawky, A.A., and Maekawa, K., The Collapse Mechanism of a Subway Station during the Great Hanshin Earthquake, Cement and Concrete Composites, 19(3), 1997, pp. 241–257. [CrossRef]

Suryanto, B., Morgan, R., and Han, A.L., Predicting the Response of Shearcritical Reinforced Concrete Beams using Response-2000 and SNI 2847:2013, Civil Engineering Dimension, 18(1), 2016, pp. 16–24. [CrossRef]

SNI 2847:2013, Persyaratan Beton Struktural untuk Bangunan Gedung, Badan Standardisasi Nasional, Department of Public Work of Indonesia, 2013. [CrossRef]

ACI 318M-11, Building Code Requirements for Structural Concrete and Commentary, American Concrete Institute, 2011. [CrossRef]

Blaber, J., Adair, B., and Antoniou, A., Ncorr: Open Source 2D Digital Image Correlation Matlab Software, Experimental Mechanics, 55(6), 2015, pp. 1105–1122. [CrossRef]

BS 8666:2005, Scheduling, Dimensioning, Bending and Cutting of Steel Reinforcement for Concrete - Specification, British Standards Institution, 2008. [CrossRef]

BS 4449:2005+A3:2016, Steel for the Reinforcement of Concrete – Weldable Reinforcing Steel – Bar, Coil and Decoiled Product - Specification, British Standards Institution, 2016. [CrossRef]

BS EN 197-1:2011, Cement: Composition, Specifications and Conformity Criteria for Common Cements, British Standards Institution, 2011. [CrossRef]

BS EN 12390-3:2009, Testing Hardened Concrete: Compressive Strength of Test Specimens, British Standards Institution, 2009. [CrossRef]

Ncorr, retrieved from http://www.ncorr.com/ download/ncorr_v1_2_1.zip (accessed 20/02/2016). [CrossRef]

Collins, M.P. and Kuchma, D., How Safe are Our Large, Lightly Reinforced Concrete Beams, Slabs, and Footings?, ACI Structural Journal, 96(4), 1999, pp. 482–490. [CrossRef]

BS EN 1992-1-1:2004+A1:2014, Eurocode 2: Design of Concrete Structures: General Rules and Rules for Buildings, British Standards Institution, 2004. [CrossRef]

Downloads

Published

2017-09-01

How to Cite

Suryanto, B., Tambusay, A., & Suprobo, P. (2017). Crack Mapping on Shear-critical Reinforced Concrete Beams using an Open Source Digital Image Correlation Software. Civil Engineering Dimension, 19(2), 93-98. https://doi.org/10.9744/ced.19.2.93-98