Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/96418
Title: | Shear strengthening of reinforced concrete beams using geopolymer-bonded small-diameter FRP bars | Authors: | Peng, KD Huang, JQ Huang, BT Xu, LY Dai, JG |
Issue Date: | 1-Feb-2023 | Source: | Composite structures, 1 Feb. 2023, v. 305, 116513 | Abstract: | In this study, a comprehensive investigation of the shear behavior of RC beams strengthened with a small-diameter FRP bar-reinforced geopolymer matrix (FRGM) system is presented for the first time. A total of twelve RC beams, including two reference beams and ten strengthened beams, were prepared and tested. Five factors were considered, including bonding methods (geopolymer-bonded vs. epoxy-bonded), matrix types (slag-to-fly ash ratios of 9:1 vs. 6:4), alignment directions of small-diameter FRP bars (90° vs. 45° to the longitudinal direction), configurations of FRGM layers (single-side vs. double-side), and shear span-to-depth ratios of RC beams (a/d = 2.4 vs. 3.2). The strengthening efficiency of RC beams with the double-side FRGM layer (1.9 times that of the reference beam) was found to be much larger than that of the RC beams with the single-side FRGM layer (1.2 times that of the reference beam). In addition, the geopolymer-bonded layer showed a similar load capacity (approximately 98 %) to its epoxy-bonded counterpart. The use of steel fibers in geopolymer matrix further restrained the development of shear cracks and improved the shear capacity. Finally, a theoretical analysis method was proposed for predicting the shear capacity of the FRGM-strengthened RC beams. | Keywords: | Fiber-Reinforced Polymer (FRP) Small-diameter FRP bar Geopolymer Alkali-activated fly ash/slag Shear strengthening Reinforced concrete |
Publisher: | Elsevier Ltd | Journal: | Composite structures | ISSN: | 0263-8223 | EISSN: | 1879-1085 | DOI: | 10.1016/j.compstruct.2022.116513 |
Appears in Collections: | Journal/Magazine Article |
Show full item record
Page views
67
Last Week
1
1
Last month
Citations as of Oct 13, 2024
SCOPUSTM
Citations
21
Citations as of Jun 21, 2024
WEB OF SCIENCETM
Citations
23
Citations as of Oct 17, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.