Behaviour of concentrically loaded geopolymer-concrete circular columns reinforced longitudinally and transversely with GFRP bars
Article
Article Title | Behaviour of concentrically loaded geopolymer-concrete circular columns reinforced longitudinally and transversely with GFRP bars |
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ERA Journal ID | 4188 |
Article Category | Article |
Authors | Maranan, G. B. (Author), Manalo, A. C. (Author), Benmokrane, B. (Author), Karunasena, W. (Author) and Mendis, P. (Author) |
Journal Title | Engineering Structures |
Journal Citation | 117, pp. 422-436 |
Number of Pages | 15 |
Year | 2016 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0141-0296 |
1873-7323 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.engstruct.2016.03.036 |
Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S0141029616300712 |
Abstract | The behavior of concentrically loaded geopolymer-concrete circular columns reinforced longitudinally and transversely with glass–fiber-reinforced-polymer (GFRP) bars was investigated. Six full-scale short columns (L/r = 8) were cast: one column without transverse reinforcement; three columns with circular hoops spaced at 50 mm, 100 mm, and 200 mm on centers; and two columns with spirals spaced at 50 mm and 100 mm on centers. In addition, two slender columns (L/r = 16) transversely reinforced with hoops and spirals both spaced at 100 mm on centers were fabricated. Based on the experimental results, the GFRP bars contributed an average of 7.6% to the overall capacity of the tested columns. The hoop- and spiral-confined slender columns failed at a load equal to 66% and 82%, respectively, of the strength of their counterpart short columns. Irrespective of the tie configuration, the columns with higher volumetric ratios showed better compressive behavior than those with lower volumetric ratios. The ductility and confinement efficiency of the spiral-confined columns were higher than that of their counterpart hoop-confined columns. The tested columns yielded relatively superior compression performance compared to OPC-based concrete columns reinforced with GFRP bars and ties. Further studies dealing with the behavior and slenderness limit in GFRP-reinforced geopolymer concrete slender columns are recommended to increase its uptake in the construction industry. |
Keywords | geopolymer-concrete columns; glass–fiber-reinforced polymer (GFRP) bars; short columns; slender columns; hoops; spirals |
ANZSRC Field of Research 2020 | 400510. Structural engineering |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Centre of Excellence in Engineered Fibre Composites |
University of Sherbrooke, Canada | |
University of Melbourne | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q37z4/behaviour-of-concentrically-loaded-geopolymer-concrete-circular-columns-reinforced-longitudinally-and-transversely-with-gfrp-bars
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