Axial monotonic and cyclic compressive behavior of square GFRP tube–confined steel-reinforced concrete composite columns

Abstract

Fiber-reinforced polymer tube–confined steel fiber–reinforced concrete column is a novel composite column proposed recently, which consists of a traditional steel-reinforced concrete column and an external glass fiber–reinforced plastic tube for lateral confinement. In order to investigate the axial compression behavior of steel fiber–reinforced concrete columns, a total of 16 square specimens were fabricated and tested under axial monotonic and cyclic compressive loading. Three different configurations of inner shaped steels, including cross-shaped, box-shaped with wielding, and box-shaped without wielding were considered. Two thicknesses of glass fiber–reinforced concrete tubes were also considered as the main experimental parameters. On the basis of test results, a thorough analysis of the failure process based on strain analysis was discussed. The test results showed that steel fiber–reinforced concrete columns exhibited higher ductility and load capacity compared with fiber-reinforced plastic–confined plain concrete columns. Two quantitative indexes were proposed to measure the confinement of steel fiber–reinforced concretes. The axial cyclic mechanical behaviors were discussed through comparative analysis with monotonic behaviors. The remnant strains and modulus of the cyclic behaviors were also discussed.

Analysis on Mechanical Properties of FRP Constrained Concrete Core Reinforcement Under Cyclic Load

“…These characteristics are closely related to the internal structure and material composition of concrete, and have important guidance for its performance degradation and safety assessment under dynamic load. Further study of the mechanical behavior characteristics of concrete under cyclic load is helpful to further understanding of its damage evolution mechanism and durability assessment, and provide scientific basis for structural design and safety assessment [16].…”

Innovating arch structures with fiber-reinforced polymer composites: A review

“…While extensive research has been carried out on CFFTCs (e.g., Fam and Rizkalla, 2001a; Fam and Rizkalla, 2001b; Huang et al, 2021; Mirmiran and Shahawy, 1997; Pei et al, 2021; Xie et al, 2020; Xie et al, 2023; Yu and Teng, 2011; Zohrevand and Mirmiran, 2013), studies on CFFTAs have been mostly limited to a research group of University of Maine. It is worth noting that unlike most of the previous studies on CFFTMs, the FRP tubes used by this group were not filament-wound.…”

Combined effects of sulfate attack under drying–wetting cycles and loading on the fatigue behavior of concrete

“…In actual engineering, concrete bridge concrete structures are not only subjected to both drying–wetting cycles and sulfate attack, but also to fatigue loading, such as vehicle loads on bridges. The internal structure of concrete will be damaged under the action of drying–wetting cycles, sulfate attack, and loading (Tang et al, 2015; Pei et al, 2020). Therefore, it is necessary to investigate the fatigue characteristics of concrete under complicated conditions, to understand the failure mechanism of concrete better and evaluate the useful life of concrete structures exactly.…”