A novel technique to improve the compressive strength and ductility of glass fiber reinforced polymer (GFRP) composite bars
Article
Article Title | A novel technique to improve the compressive strength and ductility of glass fiber reinforced polymer (GFRP) composite bars |
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ERA Journal ID | 3470 |
Article Category | Article |
Authors | Liu, Yue, Zhang, Hong-Tao, Tafsirojjaman, T., Dogar, Attiq Ur Rahman, Alajarmeh, Omar Al, Yue, Qing-Rui and Manalo, Allan |
Journal Title | Construction and Building Materials |
Journal Citation | 326, pp. 1-18 |
Article Number | 126782 |
Number of Pages | 18 |
Year | 2022 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0950-0618 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.conbuildmat.2022.126782 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0950061822004706 |
Abstract | Glass fiber reinforced polymer (GFRP) composite bars have excellent durability compared to traditional steel reinforcements but their strength contribution in the design of compression members is generally neglected. The non-homogeneous and anisotropic nature of GFRP bars including their complex behavior in compression and the lack of standard testing procedure have hindered their use as compressive reinforcements. To improve their behavior and strength in compression, a novel technique has been developed by winding additional GFRP layers around the longitudinal fibers. One, two and three winding layers with a thickness of 1.5 mm for each layer and a winding angle of ± 83.3° have been used. Compressive strength tests have then been conducted on 20 mm and 30 mm high GFRP bars with a core diameter of 20 mm to determine the improvement in compressive strength, ductility, and failure behavior. Test results showed that the 20 mm core diameter GFRP bars have shown promising improvement in the compressive strength and ductility with the increased number of winding layers wherein the compressive strength of the 20 mm and 30 mm high bars increased by 74% and 63%, respectively for bars with three winding layers. Comparison of the mechanical properties in compression and tension showed that the optimum strength and ductility improvement can be achieved with two winding layers. A simple theoretical strength model has been developed which can reliably predict the compressive strength of the winded GFRP bars. |
Keywords | Compressive strength; Ductility; Failure modes; GFRP bars; Prediction model; Winding layers |
ANZSRC Field of Research 2020 | 400505. Construction materials |
400510. Structural engineering | |
401602. Composite and hybrid materials | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Funder | Beijing University of Technology |
Byline Affiliations | Centre for Future Materials |
School of Engineering | |
Institute for Advanced Engineering and Space Sciences | |
Beijing University of Technology, China | |
Centre for Future Materials (Operations) | |
University of Central Punjab, Pakistan | |
Centre for Future Materials (Research) | |
University of Science and Technology Beijing, China |
https://research.usq.edu.au/item/wq793/a-novel-technique-to-improve-the-compressive-strength-and-ductility-of-glass-fiber-reinforced-polymer-gfrp-composite-bars
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