Crack Propagation Analysis of Synthetic vs. Steel vs. Hybrid Fibre-Reinforced Concrete Beams Using Digital Image Correlation Technique

Bhosale, Aniket B. and Prakash, S. Suriya (2020) Crack Propagation Analysis of Synthetic vs. Steel vs. Hybrid Fibre-Reinforced Concrete Beams Using Digital Image Correlation Technique. International Journal of Concrete Structures and Materials, 14 (1). ISSN 1976-0485

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Improvement in fracture behaviour of fibre-reinforced concrete (FRC) due to the inclusion of various types and combinations of fibres is widely reported. The fracture behaviour of FRC needs to be fully understood for the optimum use of these fibres in structural elements. Fracture behaviours of synthetic fibre-reinforced concrete (SynFRC), hybrid fibre-reinforced concrete (HFRC) and steel fibre-reinforced concrete (SFRC) are investigated in this study using digital image correlation (DIC) technique. This work focuses on improvement in the structural performance of FRC through a comprehensive study of the change in the crack length, crack opening and fracture process zone (FPZ) due to different fibres addition and their combinations. Three distinct fibre dosages of 0.50%, 0.75%, and 1.00%, of macro-polyolefin fibres, hooked end steel fibres and their hybrid combination are regarded as research parameters. Test outcomes indicate that HFRC offers higher post-cracking resistance when compared to SynFRC. SFRC showcases superior fracture performance than that of HFRC and SynFRC. Full-field strain measurements from DIC are used to measure the crack openings at different load levels during the fracture tests. Results of DIC analysis show good agreement with experimental measurements. Continuous monitoring of strain contours using DIC reveals the effective engagement of fibres along the depth at higher dosages for HFRC when compared to that of SynFRC. Also, HFRC had longer cracks than SFRC at a particular load.

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IITH Creators:
IITH CreatorsORCiD
Bhosale, Aniket B.UNSPECIFIED
Item Type: Article
Uncontrolled Keywords: crack length; crack opening; digital image correlation; fibre-reinforced concrete; fracture behaviour; hybrid fibres; macro-synthetic fibres; steel fibres;Continuous monitoring; Crack propagation analysis; D. digital image correlation (DIC); Digital image correlation technique; Fracture process zone; Full-field strain measurement; Hybrid fibre reinforced concrete; Structural performance
Subjects: Civil Engineering
Divisions: Department of Civil Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 28 Jul 2021 05:27
Last Modified: 28 Jul 2021 05:27
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