A concrete-filled fiber-reinforced polymer-steel composite tube column consisting of inner concrete and an exterior fiber-reinforced polymer-steel tube was studied in this paper. A total of 22 specimens were tested under axial compression to investigate the performance of the circular concrete-filled fiber-reinforced polymer-steel composite tube columns. The main experimental parameters were the thickness of the steel tube, the number of fiber-reinforced polymer layers, the type of fiber-reinforced polymer, and the hybridization of fiber-reinforced polymer, in which basalt-fiber-reinforced polymer was used to manufacture concrete-filled fiber-reinforced polymer-steel composite tube columns and was compared with carbon fiber-reinforced polymer. The test results showed that local buckling of the steel tube can be suppressed and even prevented effectively with fiber-reinforced polymer strengthening, and the compressive strength of the concrete-filled fiber-reinforced polymer-steel composite tube specimens is enhanced by the external fiber-reinforced polymer confinement compared with that of the concrete-filled steel tube specimens. With the increase in the number of fiber-reinforced polymer layers or with a larger ultimate tensile strain in the fiber-reinforced polymer, the peak axial strain corresponding to fiber-reinforced polymer fracture increases accordingly. A new model that considers composite action was developed for strength prediction of concrete-filled fiber-reinforced polymer-steel composite tube columns, and the analytical results agree well with the experimental results.
No takes yet. Share an insight, caveat, or question.
Wei et al. (2014) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: