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.
The rapid reinforcement of reinforced concrete members is one of the research hotspots in the field of structural reinforcement. In this paper, the packaging technology is applied to the field of reinforced concrete structure reinforcement, and new technology of composite reinforcement of prestressed plastic steel strips and angle steel is proposed. Furthermore, in this work, axial compression tests of three prestressed plastic steel strips‐angle steel composite reinforced concrete columns and one unreinforced reinforced concrete column were carried out and studied the prestressed plastic steel strips‐clad steel composite reinforcement and plastic steel strips. Furthermore, the effect of different reinforcement spacings on the failure characteristics, bearing capacity, and ductility of components were studied. The test results show that the failure characteristics of the reinforced concrete columns reinforced with prestressed plastic‐steel strips and angle steels were the same as those of unreinforced specimens. However, the initial cracking load of the reinforced specimens was found to be greater and as the spacing of plastic‐steel strips increased, the bearing capacity also increased. Moreover, their values were found to be 36.6%, 13.6%, and 8.2%, and the maximum increase in the limit displacement was 92.9%, 52.7%, and 22.6%, respectively. From the results, it was observed that the composite reinforcement technology could improve the ultimate bearing capacity and the ductility of components and has a good application value.
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