Behavior of circular concrete columns reinforced with hollow composite sections and GFRP bars
Article
Article Title | Behavior of circular concrete columns reinforced with hollow composite sections and GFRP bars |
---|---|
ERA Journal ID | 3795 |
Article Category | Article |
Authors | Alajarmeh, Omar (Author), Manalo, Allan (Author), Benmokrane, Brahim (Author), Ferdous, Wahid (Author), Mohammed, Ali (Author), Abousnina, Rajab (Author), Elchalakani, Mohamed (Author) and Edoo, Azam (Author) |
Journal Title | Marine Structures |
Journal Citation | 72, pp. 1-17 |
Article Number | 102785 |
Number of Pages | 17 |
Year | 2020 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0951-8339 |
1873-4170 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.marstruc.2020.102785 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0951833920300794 |
Abstract | Hollow concrete columns (HCCs) constitute a structurally efficient construction system for marine and offshore structures, including bridge piers and piles. Conventionally, HCCs reinforced with steel bars are vulnerable to corrosion and can lose functionality as a result, especially in harsh environments. Moreover, HCCs are subjected to brittle failure behavior by concrete crushing due to the absence of the concrete core. Therefore, this study investigated the use of glass fiber- reinforced polymer (GFRP) bars as a solution for corrosion and the use of hollow composite- reinforced sections (HCRSs) to confine the inner concrete wall in HCCs. Furthermore, this study conducted an in-depth assessment of the effect of the reinforcement configuration and reinforcement ratio on the axial performance of HCCs. Eight HCCs with the same lateral- reinforcement configuration were prepared and tested under monotonic loading until failure. The column design included a column without any longitudinal reinforcement, one reinforced longitudinally with an HCRS, one reinforced longitudinally with GFRP bars, three reinforced with HCRSs and different amounts of GFRP bars (4, 6, and 8 bars), and three reinforced with HCRSs and different diameters of GFRP bars (13, 16, 19 mm). The test results show that longitudinal reinforcement—whether GFRP bars or HCRSs—significantly enhanced the strength and displacement capacities of the HCCs. Increasing the amount of GFRP bars was more effective than increasing the bar diameter in increasing the confined strength and the displacement capacity. The axial-load capacity of the GFRP/HCRS-reinforced HCCs could be accurately estimated by calculating the load contribution of the longitudinal reinforcement, considering the axial strain at the concrete peak strength. A new confinement model considering the combined effect of the longitudinal and transverse reinforcement in the lateral confinement process was also developed. |
Keywords | Hollow concrete column; GFRP bar; Spiral; Compressive load; Lateral confinement; Composite tube; Design codes |
ANZSRC Field of Research 2020 | 400510. Structural engineering |
400505. Construction materials | |
401602. Composite and hybrid materials | |
Byline Affiliations | Centre for Future Materials |
University of Sherbrooke, Canada | |
University of Western Australia | |
Composite Reinforcing Solutions, Australia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5v91/behavior-of-circular-concrete-columns-reinforced-with-hollow-composite-sections-and-gfrp-bars
Download files
182
total views225
total downloads0
views this month0
downloads this month