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Title: | Flexural Behavior of Two-Span Continuous CFRP RC Beams | Authors: | Pang, Miao Shi, Sensen Hu, Han Lou, Tiejiong |
Keywords: | carbon-reinforced polymer; numerical analysis; structural behavior; moment redistribution | Issue Date: | 9-Nov-2021 | Publisher: | MDPI | Project: | UIDB/00285/2020 | Serial title, monograph or event: | Materials | Volume: | 14 | Issue: | 22 | Abstract: | This paper investigates the feasibility of replacing steel bars with carbon-fiber-reinforced polymer (CFRP) bars in continuous reinforced concrete (RC) beams. A numerical model is introduced. Model predictions are compared with the experimental results that are available in the literature. A comprehensive numerical investigation is then performed on two-span CFRP/steel RC beams with ρb2 = 0.61-3.03% and ρb1/ρb2 = 1.5, where ρb1 and ρb2 are tensile bar ratios (ratios of tensile bar area to effective cross-sectional area of beams) over positive and negative moment regions, respectively. The study shows that replacing steel bars with CFRP bars greatly improves the crack mode at a low bar ratio. The ultimate load of CFRP RC beams is 89% higher at ρb2 = 0.61% but 7.2% lower at ρb2 = 3.03% than that of steel RC beams. In addition, CFRP RC beams exhibit around 13% greater ultimate deflection compared to steel RC beams. The difference of moment redistribution between CFRP and steel RC beams diminishes as ρb2 increases. ACI 318-19 appears to be conservative, and it leads to more accurate predictions of moment redistribution in CFRP RC beams than that in steel RC beams. | URI: | https://hdl.handle.net/10316/105205 | ISSN: | 1996-1944 | DOI: | 10.3390/ma14226746 | Rights: | openAccess |
Appears in Collections: | I&D CEMMPRE - Artigos em Revistas Internacionais |
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Flexural-behavior-of-twospan-continuous-cfrp-rc-beamsMaterials.pdf | 3.11 MB | Adobe PDF | View/Open |
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