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Title: GFRP-Reinforced Concrete Columns Subjected to Seismic Loads

Author(s): Shamim Sheikh and Zahra Kharal

Publication: Symposium Paper

Volume: 326


Appears on pages(s): 56.1-56.10

Keywords: columns; concrete confinement; corrosion resistance; ductility; GFRP; seismic response; sustainable infrastructure

DOI: 10.14359/51711039

Date: 8/10/2018


Steel corrosion in reinforced concrete structures costs a significant amount of resources globally. Use of glass fibre-reinforcement polymers (GFRP) as reinforcement presents a feasible and cost-effective solution to build sustainable infrastructure. Despite many advantages of GFRP, design codes do not recommend its usage in compression, primarily due to a lack of experimental data. The goal of this research is to gain a better understanding of the behavior of GFRP as internal reinforcement especially in columns. The part of the program discussed in some detail in this paper involved testing of 20 full-scale GFRP- and steel-RC columns under simulated earthquake loads. The variables investigated included column shape, amount and spacing of transverse reinforcement and axial load.

A significant conclusion drawn from this research is that GFRP can not only can be used efficiently as primary lateral reinforcement in columns but also confines the column concrete core more effectively than steel. GFRP longitudinal bars were found to resist about 60% of their tensile capacity in compression, but their low elastic modulus elasticity reduced the column capacity and stiffness. GFRP-reinforced columns with appropriate design can be made to have excellent seismic resistance.