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Home > Archives > Volume 20, No 11 (2022) > Article

DOI: 10.14704/nq.2022.20.11.NQ66140

Flexural Behavior of Sustainable Reinforced Concrete Beam Strengthened by External Carbon Fiber Reinforced Polymer (CFRP) sheets

Ali N. Hussein1, Aymen J. Alsaad , Zainab M.R. Abdul Rasoul

Abstract

The main objective of this paper is to examine the performance and residual strength of seven pozzolime reinforced concrete beams (six of them strengthened with external carbon fiber reinforced polymer CFRP sheets) were presented to study the impact of several parameters on their structural behavior of them. The experimental program involves casting and testing seven samples divided into three primary groups. These groups were categorized according to the amount and length of CFRP sheets and the percent of steel fiber (0%.0.5%, and 1%). Those beams with similar reinforcement and geometry with 1400 x 200 x 120 mm in dimensions. The experimental analysis was extended to different parameters investigation such as; the impact of added CFRP sheet length and the percent of added steel fibers on ultimate load capacity, load-deflection response, and ductility factor. The results indicated that the failure mode observed in the strengthened beams in this experiment was the intermediate flexure crack-induced debonding failure which occurred in the externally strengthened beams, and the percent of added steel fibers has a small effect on the ductility factor, where the range of the ductility factor values of externally strengthened beams were (2.1 to 2.24).The percent of increase in ultimate load was 38.2, 42.7, 46.1, 21.7, 25.4, and 28.5% for specimens B0EA, B0.5EA, B1EA, B0EP, B0.5EP, and B1EP, respectively with respect to the reference specimen B0.

Keywords

Sustainable Reinforcement Concrete; Fiber Reinforced Polymer; Ultimate load; pozzolime concrete.

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