Flexural behavior of ultra-high-performance fiber-reinforced concrete beams reinforced with GFRP and steel rebars
- Title
- Flexural behavior of ultra-high-performance fiber-reinforced concrete beams reinforced with GFRP and steel rebars
- Author
- 류두열
- Keywords
- Ultra-high-performance fiber-reinforced concrete; Glass fiber-reinforced polymer; Hybrid reinforcement; Serviceability; Ductility; Sectional analysis
- Issue Date
- 2016-03
- Publisher
- ELSEVIER SCI LTD
- Citation
- ENGINEERING STRUCTURES, v. 111, Page. 246-262
- Abstract
- This study describes the flexural behavior of ultra-high-performance fiber-reinforced concrete (UHPFRC) beams reinforced with glass fiber-reinforced polymer (GFRP) rebars and hybrid reinforcements (steel + GFRP rebars). Three GFRP bar-reinforced beams and four hybrid reinforced beams with different reinforcement ratios were fabricated and tested. Owing to the strain-hardening characteristics of UHPFRC, all test beams exhibited very stiff load-deflection behavior after the formation of cracks and satisfied the service crack width criteria of CAN/CSA S806. In addition, deformability factors higher than the lower limit of CAN/CSA-S6 were obtained for all test beams. The increase in the reinforcement ratio of GFRP rebars resulted in the improvement of their flexural performances, including post-cracking stiffness, load carrying capacity, and ductility (or deformability). The use of hybrid reinforcements by replacing a part of a GFRP rebar with a steel rebar contributed to a higher post-cracking stiffness before steel yielding, but led to lower deformability. Based on a sectional analysis, both AFGC/SETRA and JSCE recommendations were appropriate for predicting the moment-curvature response of UHPFRC beams with GFRP rebars and hybrid reinforcements: the average ratios of the maximum moments obtained from experiments and numerical analyses were found to be 1.12 and 0.94, respectively. (C) 2015 Elsevier Ltd. All rights reserved.
- URI
- http://www.sciencedirect.com/science/article/pii/S014102961500766X?via%3Dihubhttp://hdl.handle.net/20.500.11754/35029
- ISSN
- 0141-0296; 1873-7323
- DOI
- 10.1016/j.engstruct.2015.12.003
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
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