Location

London

Event Website

http://www.csce2016.ca/

Description

This paper presents experimental and analytical investigations on the flexural behaviour of rectangular concrete-filled fiber-reinforced polymer (FRP) tube (CFFT) beams with steel rebar. Eight full-scale CFFT beams and two control reinforced concrete (RC) beams were tested under a four-point bending. Several parameters as the FRP tubes thickness, fiber laminates, and steel reinforcement were studied. The experimental results indicate outstanding performance of the CFFT beams in terms of strength and ductility compared to the RC beams. Some CFFT beams attained flexural strength and ductility 540% and 1430% higher than that of the RC beams, respectively. Theoretical analysis was developed to determine the flexural capacities of the CFFT beam system through cracking, yield, and ultimate stages. A strain compatibility/equilibrium model was developed to predict the moment-curvature response of the CFFT beams addressing the issue of confinement and tension stiffening of concrete. The analytical model can predict well the flexural moments, curvature, deflection, strains, and neutral axis location.


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Jun 1st, 12:00 AM Jun 4th, 12:00 AM

STR-938: FLEXURAL BEHAVIOUR OF RECTANGULAR FRP-TUBES FILLED WITH REINFORCED CONCRETE: EXPERIMENTAL AND ANALYTICAL INVESTIGATIONS

London

This paper presents experimental and analytical investigations on the flexural behaviour of rectangular concrete-filled fiber-reinforced polymer (FRP) tube (CFFT) beams with steel rebar. Eight full-scale CFFT beams and two control reinforced concrete (RC) beams were tested under a four-point bending. Several parameters as the FRP tubes thickness, fiber laminates, and steel reinforcement were studied. The experimental results indicate outstanding performance of the CFFT beams in terms of strength and ductility compared to the RC beams. Some CFFT beams attained flexural strength and ductility 540% and 1430% higher than that of the RC beams, respectively. Theoretical analysis was developed to determine the flexural capacities of the CFFT beam system through cracking, yield, and ultimate stages. A strain compatibility/equilibrium model was developed to predict the moment-curvature response of the CFFT beams addressing the issue of confinement and tension stiffening of concrete. The analytical model can predict well the flexural moments, curvature, deflection, strains, and neutral axis location.

http://ir.lib.uwo.ca/csce2016/London/Structural/83