Flexural behavior of ultra-high-performance fiber-reinforced concrete beams reinforced with GFRP and steel rebars
- Authors
- Yoo, Doo Yeol; Banthia, Nemkumar; Yoon, Young-Soo
- Issue Date
- Mar-2016
- Publisher
- ELSEVIER SCI LTD
- Keywords
- uctility; Glass fiber-reinforced polymer; Hybrid reinforcement; Sectional analysis; Serviceability; Ultra-high-performance fiber-reinforced concrete
- Citation
- ENGINEERING STRUCTURES, v.111, pp.246 - 262
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENGINEERING STRUCTURES
- Volume
- 111
- Start Page
- 246
- End Page
- 262
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/154901
- DOI
- 10.1016/j.engstruct.2015.12.003
- ISSN
- 0141-0296
- 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
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