Experimental Study on the Impact of Using FRP Sheets on the Axial Compressive Performance of Short-Circular Composite Columns

Abstract

This paper conducts an experimental study on the axial compressive performance of FRP-steel-concrete composite columns. Nine short columns were produced and evaluated in the study, comprising of three concrete-filled steel tube reference columns and six FRP-steel-concrete composite columns, respectively denoted as “reference columns” and “composite columns”. Two categories of failure modes, including shear failure and waist drum, were observed from the experiments. The failure mode may trend toward waist drum from shear failure as more FRP layers were used. The number of FRP layers had a direct effect on the level of compressive strength attained, with a greater number of layers resulting in a greater increase in compressive strength. Moreover, a greater tensile strength and higher elastic modulus of CFRP sheets are more effective at improving the compressive stiffness of the columns. Finally, a four-stage confinement mechanism for FRP-wrapped steel tube concrete composite columns is proposed and discussed, through which the damage mechanisms of the composite structures are more rationally characterized.

Numerical Study on the Axial Compressive Behavior of Steel-Tube-Confined Concrete-Filled Steel Tubes

“…However, shear failure can still be observed in some cases for the CFST and T-C columns, even with RC or SRC infilling [ 13 ]. Besides, external confinement is employed in the form of steel tubes [ 14 , 15 , 16 , 17 , 18 ], fiber reinforced plastic (FRP) tubes [ 19 , 20 ], FRP jackets [ 21 , 22 , 23 , 24 ], FRP rings [ 25 , 26 , 27 , 28 ], or discrete stirrup [ 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ], which enhances the mechanical properties of the CFST columns to a certain extent.…”

“…Materials 2024, 17, x FOR PEER REVIEW 2 of 28 with RC or SRC infilling [13]. Besides, external confinement is employed in the form of steel tubes [14][15][16][17][18], fiber reinforced plastic (FRP) tubes [19,20], FRP jackets [21][22][23][24], FRP rings [25][26][27][28], or discrete stirrup [29][30][31][32][33][34][35][36], which enhances the mechanical properties of the CFST columns to a certain extent. Apart from that, the newly developed steel-tube-confined CFST (T-CFST) columns have been proven to be effective in improving load-bearing capacity and preventing CFST columns from experiencing shear failure [13,37,38].…”

Feasibility of Repairing Concrete with Ultra-High Molecular Weight Polyethylene Fiber Cloth: A Comprehensive Literature Review

“…Li et al [152] demonstrated the cracking propagation in small-sized concrete specimens. The development of load-bearing capacity is a significant concern after wrapping FRP cloth around concrete elements [153][154][155]. Campione [156] conducted compressive experiments on concrete prisms wrapped with carbon FRP cloth.…”

Experimental Study and Numerical Analysis of the Seismic Performance of Glass-Fiber Reinforced Plastic Tube Ultra-High Performance Concrete Composite Columns

“…Currently, there are various combinations of concrete-filled FRP tube (CFFT) columns that have been studied. Cao et al derived a stress-strain model for FRP-constrained rubberconcrete columns considering the cross-sectional shape through theoretical derivation [11], and Liu et al carried out an experimental study on the axial compression performance of FRP-steel-concrete composite columns, and two types of failure modes were observed [12]. Fang et al proposed a design using recycled aggregate concrete-filled glass fiber-reinforced polymer-steel composite tube columns.…”