Abstract
Fiber-reinforced polymers (FRPs) are being widely used in the structural engineering because of their superior performance over conventional materials such as higher tensile strength, high corrosion resistance, electromagnetic resistance, good durability and light weight. The literature is deficient in the nonlinear finite element analysis (NLFEA) and theoretical predictions of FRP-confined concrete columns. The aim of the present work is to explore the structural performance of steel-tube FRP confined concrete (STC) columns under axial concentric loading. A NLFEA model of STC columns was simulated using ABAQUS which was then, calibrated for different material and geometric models of concrete, steel tube and FRP material using the experimental results from literature. The predictions of proposed NLFEA model were in close agreement with the previous experimental measurements. An extensive parametric study was performed to examine the effects of various parameters of STC columns. Furthermore, a large database of axial strength of 543 confined concrete compression members was developed from the previous researches to propose an empirical model that predicts the ultimate axial strength of STC columns accurately.
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