Numerical simulation of confinement effect of CFRP and GFRP strengthened concrete specimens

ABSTRACT

For structural strengthening and retrofitting, advanced composite materials like carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP) are frequently utilized. Applications in civil engineering require a thorough understanding of the behaviour and response of such materials. To forecast the stress-strain behaviour, the current research focuses on the numerical simulation of CFRP and GFRP-reinforced concrete specimens. ABAQUS was used to model a concrete specimen using the C3D8R solid element. The material modeling has considered the nonlinear compression behaviour of concrete and the linear elastic compression behaviour of CFRP/GFRP. The research examined gains in load-carrying capacity compared to concrete of normal strength and confined to unconfined strengths. The validity of numerical simulation has been confirmed through comparison with published experimental results. Additionally, the impact of the number of layers is carefully examined. Additionally, a comparison of the stress-strain characteristics of specimens enhanced with GFRP and CFRP has been conducted.

Keywords:
CFRP; GFRP; Reinforced concrete; FRP Laminates; Three-point bending test