Concentrically loaded recycled aggregate geopolymer concrete columns reinforced with GFRP bars and spirals
Article
Article Title | Concentrically loaded recycled aggregate geopolymer concrete columns reinforced with GFRP bars and spirals |
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ERA Journal ID | 3731 |
Article Category | Article |
Authors | Raza, Ali (Author), Manalo, Allan C. (Author), Rafique, Umer (Author), Alajarmeh, Omar S. (Author) and Khan, Qaiser Uz Zaman (Author) |
Journal Title | Composite Structures |
Journal Citation | 268, pp. 1-16 |
Article Number | 113968 |
Number of Pages | 16 |
Year | 2021 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0263-8223 |
1879-1085 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.compstruct.2021.113968 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0263822321004281 |
Abstract | The increased quantity of construction and demolition waste and the high carbon footprint of cement production is creating significant environmental problems. This study explored the use of recycled coarse aggregates (RCA) in geopolymer concrete (GPC) and reinforced with glass fiber reinforced polymer (GFRP) bars and spirals to fabricate novel and structural GRAGC columns. A total of 9 GRAGC columns with 1150 mm in height and 250 mm in diameter were tested to failure under axial compression. The influence of a different number of longitudinal GFRP bars and spiral spacing on the cracking behaviour, ductility, and axial load-carrying capacity (LCC) were investigated. A nonlinear finite element model (FEM) was implemented to predict the axial compressive response of GRAGC columns. The experimental results depicted that an improvement in the ductility and lateral confinement was observed by decreasing the spacing of GFRP spirals. GRAGC columns with eight longitudinal GFRP bars portrayed the highest LCC. All tested GRAGC columns portrayed similar failure modes with the damage at the central region of the specimens. The theoretical model suggested over a database of 225 GFRP reinforced columns showed a high accuracy compared with the previous models. The present study suggests an efficient and environmental-friendly compression member. |
Keywords | Geopolymer concrete; Recycled aggregate concrete; GFRP spirals; Finite element modeling; Damaged plastic model |
ANZSRC Field of Research 2020 | 400510. Structural engineering |
Byline Affiliations | Centre for Future Materials |
National University of Sciences and Technology, Pakistan | |
University of Engineering and Technology, Pakistan | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6yv8/concentrically-loaded-recycled-aggregate-geopolymer-concrete-columns-reinforced-with-gfrp-bars-and-spirals
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