Behaviour of hollow pultruded GFRP square beams with different shear span-to-depth ratios
Article
Article Title | Behaviour of hollow pultruded GFRP square beams with different shear span-to-depth ratios |
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ERA Journal ID | 4918 |
Article Category | Article |
Authors | Muttashar, Majid (Author), Karunasena, Warna (Author), Manalo, Allan (Author) and Lokuge, Weena (Author) |
Journal Title | Journal of Composite Materials |
Journal Citation | 50 (21), pp. 2925-2940 |
Number of Pages | 16 |
Year | 2016 |
Publisher | SAGE Publications Ltd |
Place of Publication | United Kingdom |
ISSN | 0021-9983 |
1530-793X | |
Digital Object Identifier (DOI) | https://doi.org/10.1177/0021998315614993 |
Web Address (URL) | https://journals.sagepub.com/doi/10.1177/0021998315614993 |
Abstract | It is important to determine accurately the elastic properties of fibre-reinforced polymer composites material, considering that their member design is often governed by deflection rather than strength. In this study, the elastic properties of the pultruded glass fibre-reinforced polymer square sections were evaluated firstly using full-scale with different shear span to depth (a/d) ratios and tested under static four-point bending. Back calculation and simultaneous methods were then employed to evaluate the flexural modulus and shear stiffness and were compared with the results of the coupon tests. Secondly, the full-scale beams were tested up to failure to determine their capacity and failure mechanisms. Finally, prediction equations describing the behaviour of the pultruded glass fibre-reinforced polymer square beams were proposed and compared with the experimental results. The results indicate that the back calculation method gives more reliable values of elastic properties of glass fibre-reinforced polymer profiles. In addition, the behaviour of the beams is strongly affected by the a/d ratios. The shear was found to have a significant contribution on the behaviour of beams with lower a/d ratios while the flexural stress played a major part for higher a/d ratios. The proposed equation, which accounts for the combined effect of the shear and flexural stresses, reasonably predicted the failure load of pultruded glass fibre-reinforced polymer square beams. |
Keywords | elastic properties, characterization, shear, flexural, failure load, GFRP beams |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 400510. Structural engineering |
401602. Composite and hybrid materials | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Centre of Excellence in Engineered Fibre Composites |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q3287/behaviour-of-hollow-pultruded-gfrp-square-beams-with-different-shear-span-to-depth-ratios
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