Parametric analysis of the behavior of combined FRP-Steel confinement concrete columns under eccentricity of the load

Noamani, Hiwa; Sayari, Arash

doi:10.22075/ijnaa.2022.27172.3520

Parametric analysis of the behavior of combined FRP-Steel confinement concrete columns under eccentricity of the load

Articles in Press

Document Type : Research Paper

Authors

Hiwa Noamani

Arash Sayari

Department of Civil Engineering, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran

10.22075/ijnaa.2022.27172.3520

Abstract

Fibre-reinforced polymer (FRP) jacketing of reinforced concrete (RC) columns is now a widely accepted strengthening technique in civil engineering. Lightweight, high strength and corrosion resistance are among the properties that have made this type of material valuable in various forms in building engineering. In this paper, the behavior of combined FRP-Steel RC columns under the effect of load eccentricity is investigated using ABAQUS. The focus of the parametric studies was on a wide range of subject variables, including FRP layer thickness, shear reinforcement ratio $(\rho_{ss})$, longitudinal reinforcement shear reinforcement ratio $(\rho_{sl})$, height-to-diameter ratio of the circular column (H/(d), concrete cover, concrete strength and eccentricity (strain gradient). The results showed that the eccentricity of the load had the greatest effect on the maximum lateral strain and the least effect on the ductility of the circular column. Also, the reduction of compressive strength of concrete (f(c) has the greatest effect on the ductility and yield stress of the column and the least effect on the maximum axial and lateral strain.

Keywords

FRP-Steel

confinement concrete columns

eccentricity

load

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