STRAIN FIELD OF REINFOCED CONCRETE UNDER ACCELERATED CORROSION BY DIGITAL IMAGE CORRELATION TECHNIQUE

The strain field evolution and crack pattern of reinforced concrete attacked by accelerated corrosion have been studied using strain gauges and the digital image correlation (DIC) technique. Results show that there was good consistency between DIC and the classical strain gauges about the strain field evolution of corroding reinforced concrete. Moreover, the strain field and crack behavior of reinforced concrete could be tracked by DIC image pattern intuitively and its stress field could also be calculated by DIC quantitatively. However, the micro-deformation of reinforced concrete could be obtained by DIC because of its test accuracy. When reinforced concrete was attacked by accelerated corrosion, the tension stress was applied to the upper zone of reinforced bar, and the compressive stress was applied to its bottom zone. And the brittle crack was mainly a failure model of reinforced concrete. Keyword: reinforced concrete; accelerated corrosion; DIC; strain field; crack

[1]  Sofiane Amziane,et al.  Flexural cracking behavior of normal strength, high strength and high strength fiber concrete beams, using Digital Image Correlation technique , 2016 .

[2]  Jin Zuquan,et al.  Corrosive Crack and its 3D Defects Identification of Reinforced Concrete Subjected to Coupled Effect of Chloride Ions and Sulfate Ions , 2015, International Journal of Electrochemical Science.

[3]  Dimitrios G. Aggelis,et al.  Characterization of mechanical performance of concrete beams with external reinforcement by acoustic emission and digital image correlation , 2013 .

[4]  C. Jaturapitakkul,et al.  Initial corrosion presented by chloride threshold penetration of concrete up to 10 year-results under marine site , 2012 .

[5]  Mohammad Shekarchi,et al.  Time-dependent performance of concrete surface coatings in tidal zone of marine environment , 2012 .

[6]  Mark Alexander,et al.  Interaction between corrosion crack width and steel loss in RC beams corroded under load , 2010 .

[7]  Mark Alexander,et al.  Behaviour of RC beams corroded under sustained service loads , 2009 .

[8]  M. Biezma,et al.  Methodology to study cost of corrosion , 2005 .

[9]  Y. Ballim,et al.  Reinforcement corrosion and the deflection of RC beams––an experimental critique of current test methods , 2003 .

[10]  Julio Appleton,et al.  CASE STUDIES OF CONCRETE DETERIORATION IN A MARINE ENVIRONMENT IN PORTUGAL , 2002 .

[11]  Juraj Bilčík,et al.  Effect of Reinforcement Corrosion on Bond Behaviour , 2013 .

[12]  Lori Graham-Brady,et al.  Digital image correlation analysis of interfacial debonding properties and fracture behavior in concrete , 2007 .