Novel testing and characterization of GFRP bars in compression
Article
Article Title | Novel testing and characterization of GFRP bars in compression |
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ERA Journal ID | 3470 |
Article Category | Article |
Authors | Alajarmeh, O. S. (Author), Manalo, A. C. (Author), Benmokrane, B. (Author), Vijay, P. V. (Author), Ferdous, W. (Author) and Mendis, P. (Author) |
Journal Title | Construction and Building Materials |
Journal Citation | 225, pp. 1112-1126 |
Number of Pages | 15 |
Year | 2019 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0950-0618 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.conbuildmat.2019.07.280 |
Abstract | Glass fibre reinforced polymer (GFRP) bars have now been increasingly used as longitudinal reinforcement in concrete columns. In column design and analysis, the contribution of GFRP bars to compression is often ignored or is estimated as a fraction of its tensile strength due to the limited understanding on their compressive behaviour. Moreover, there exists no standard test method to characterise the properties of GFRP bars in compression. This study implemented a novel test method to determine and characterise the compressive properties of high modulus GFRP bars. During the preparation of test specimens, hollow steel caps filled with cementitious grout were used to confine the top and bottom ends of the GFRP bars. The effects of the bar diameter (9.5, 15.9, and 19.1 mm) and the unbraced length-to-bar diameter ratio, Lu/db (2, 4, 8, and 16) were investigated on the compressive strength of the bars. The results showed that the increase in bar diameter increases the micro-fibre buckling and decreases the compressive-to-tensile strength ratio. Similarly, the failure mode changed from crushing to fibre buckling with the increase of Lu/db ratio. Simplified theoretical equations were proposed to reliably describe the compressive behaviour of GFRP bars with different bar diameters and Lu/db ratios. |
Keywords | compressive test; GFRP bars; slenderness ratio; bar diameter; micro-fibre buckling; crushing |
ANZSRC Field of Research 2020 | 400510. Structural engineering |
400505. Construction materials | |
401602. Composite and hybrid materials | |
401609. Polymers and plastics | |
401707. Solid mechanics | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Centre for Future Materials |
University of Sherbrooke, Canada | |
West Virginia University, United States | |
University of Melbourne | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q57x2/novel-testing-and-characterization-of-gfrp-bars-in-compression
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