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Volume Title: ICASGE2023

DOI: ICASGE-RCS

¹Hamed Shabani Attar ; ¹Alireza Asadian; ²Tarik Youssef; ¹Khaled Galal; Tarik A. Youssef

¹Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, QC, Canada

²L'Université Française d'Égypte, El-Shorouk, City, New Cairo, Egypt

The results of laboratory tests on reinforced concrete (RC) elements are conventionally measured using contact instrumentations such as LVDTs and potentiometers connected to a data acquisition system. However, these tools are expensive and susceptible to damage during destructive tests. The digital image correlation (DIC) method offers a noncontact optical alternative to conventional instrumentation at an affordable cost. The DIC system consists of a digital camera, remote image recording software, and open-source digital image correlation software. This study presents the implementation of two-dimensional DIC (2D-DIC) for measuring the deflection of a glass fibre-reinforced polymer (GFRP) RC beam. To verify the results of the DIC method, one full-scale GFRP RC beam was instrumented with several linear string potentiometers and tested under the four-point bending setup up to failure. The measurements obtained by DIC from the same beam were compared with those of conventional instrumentation. It was found that the DIC technique provides adequate accuracy in deflection measurements and offers several advantages over conventional instrumentational methods. This ability is particularly of interest for GFRP RC beams, where deflection is among the key parameters controlling the design. Based on the results, the DIC technique can be considered an efficient alternative or enhancement to conventional instrumentation.

reinforced concrete; Ncorr; DIC; Deflection; Glass Fibre-Reinforced Polymer (GFRP)

Reinforced Concrete Structures (RCS)