Study on the flexural behaviours of precracked hollow core beams strengthened with core filling and unbonded prestressing steel strands

Du, Wenping; Yang, Caiqian; Pan, Yong; Chen, Yaojing; Zhang, Honglei

doi:10.1016/j.engstruct.2022.115075

Cited by 7 publications

(1 citation statement)

References 32 publications

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“…Wire winding reinforcement method is to wind steel strands at a certain distance on the outer surface of the member, which leads to the remarkable improvement of the deformation ability and cracks control ability of the reinforced member. Research 15,[31][32][33] shows that increasing the bearing capacity of the member by increasing the reinforcement ratio of longitudinal steel strands but using steel strands with larger nominal diameters or making the reinforcement ratio of steel strands too large will reduce the ductility of the reinforced beam. And the research 34,35 shows that the reinforcement of steel strands needs to apply to prestress to restrain the force of the steel strands, and the construction process requires manual control of the direction of the steel strands, which is difficult to achieve in practical engineering.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on flexural performance of reinforced concrete beams strengthened by PET

Liu

et al. 2023

Structural Concrete

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Polyethylene terephthalate (PET) is a new type of fiber‐reinforced polymer (FRP) composite material, which has the characteristics of high performance, high toughness, high tensile fracture load, low elongation, low creep, no rust, and safety in use. The good performance of PET can significantly improve the mechanical properties of its components. A total of six reinforced concrete (RC) beams were produced in the test, one of which was a comparison beam, and the other five were reinforced with PET. In the test, the PET reinforcement spacing, number of reinforcement layers, and laying method were used as control variables, and an experimental study on the normal section bending performance of the specimen was performed. The test analyses the failure characteristics, crack width, bearing capacity, and deflection of the specimens under different reinforcement conditions. The test results showed that PET reinforcement can effectively inhibit the occurrence and development of cracks in RC beams and improve the ultimate bearing capacity and ductility of the components. The smaller the PET reinforcement spacing, the higher the ultimate bearing capacity; the greater the number of PET layers, the better the ductility of the specimen. Additionally, the economy, environmental protection, and portability of PET are of great significance for its application in practical engineering reinforcement.

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