Axial compression of reinforced concrete columns strengthened by composite of prestressed plastic-steel strip and angle steel: An experimental study

摘要

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.