Flexural strengthening of reinforced concrete beams with CFRP laminates and spike anchors

Assad, Maha; Hawileh, Rami A.; Abdalla, Jamal A.

doi:10.1016/j.jcomc.2024.100443

Cited by 6 publications

(1 citation statement)

References 33 publications

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“…The concrete structure is affected by various environmental factors, and, in the process of being used, the performance of the material itself continues to deteriorate, resulting in a reduction in its bearing capacity and durability, affecting the safety of the structure. As a result, it is very necessary to reinforce and strengthen the concrete structure [2,3].…”

Section: Introductionmentioning

confidence: 99%

Flexural Performance of Reinforced Concrete Beams Strengthened with a Novel High-Strength and High-Toughness Epoxy Mortar Thin Layer

Li,

Huang,

Liu

et al. 2024

Applied Sciences

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The flexural performance of RC beams strengthened with a novel high-strength and high-toughness epoxy mortar thin layer was investigated through four-point flexural tests on two contrast beams and two strengthened beams. The effects of this strengthening method on the failure modes, crack distribution, load–deflection curves, and bearing capacity of the RC beams with two reinforcement ratios were studied. The experimental results revealed that the contrast beams exhibited the typical bending failure modes where the failure mode of the reinforced beam is the yielding of the tensile reinforcement of the original beam and then fracture damage of the new epoxy mortar-reinforced thin layer. No debonding phenomenon was observed between the reinforced thin layer and the original concrete, and no visible cracks appeared before the tensile failure occurred in the thin layer. The cracks in the reinforced beams developed slowly, increased in number, and decreased significantly in width and spacing. The stiffness of the strengthened beam increased significantly, while its deformation ductility coefficient noticeably decreased. Compared to the corresponding contrast beams, the cracking load for strengthened beams A1 and B1 increased by 14% and 23%, respectively; the yield load increased by 32% and 40%, respectively; and the peak load increased by 18% and 17%, respectively. Finally, a calculation method for the flexural bearing capacity of RC beams strengthened with the novel epoxy mortar thin layer based on the flat section assumption was proposed. The calculated values showed a good agreement with the experimental values (with errors at −11.73% and 4.14%, respectively), providing a valuable reference for further research and application related to this kind of reinforcement method.

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Section: Introductionmentioning

confidence: 99%