A novel seawater and sea sand concrete filled FRP-carbon steel composite tube column: Concept and behaviour

Experimental investigation of rectangular concrete-filled fiber reinforced polymer (FRP)-steel composite tube columns for various corner radii

Compressive behavior of FRP-confined ultra-high performance concrete (UHPC) in circular columns

Compressive performance of high-strength seawater and sea sand concrete-filled circular FRP-steel composite tube columns

Axial compressive behavior and confinement mechanism of circular FRP-steel tubed concrete stub columns

An FRP (fiber-reinforced polymer) -confined concrete filled steel tube is formed by the combination of FRP material and a concrete filled steel tube, and it combines the advantages of FRP-confined concrete and a concrete filled steel tube (CFT); however, there is still no effective model to generally describe the complete stress-strain curve of a concrete filled FRP-confined steel tube. The stress-strain response of a concrete filled FRP-confined steel tube features the dual characteristics of both FRP confined concrete and steel confined concrete. In this paper, ninety-six test results of FRP confined circular CFT columns under axial compression were collected from different researchers. The steel tube confinement index is taken as an additional key influencing parameter on the strength and deformation, and calculation methods for the ultimate strain, ultimate stress, peak strain and peak stress of a concrete filled FRP-confined steel tube are established by taking into account the steel tube confinement index. Moreover, the stress-strain model was developed to describe the complete stress-strain curve consisting of the four stages of a concrete filled FRP-confined steel tube. The proposed model reflects the characteristics of the stress-strain behavior of a concrete filled FRP-confined steel tube with good accuracy and simplicity.

Jiawen Bai

Papers

A novel seawater and sea sand concrete filled FRP-carbon steel composite tube column: Concept and behaviour

Stress-strain model of an FRP-confined concrete filled steel tube under axial compression

Compressive performance of high-strength seawater and sea sand concrete-filled circular FRP-steel composite tube columns