Axial compression behavior of fully encased composite columns reinforced with longitudinally in glass fiber reinforced polymer (GFRP) bars

Sasikumar P.; Makesh Kumar  S.

doi:10.7764/RDLC.24.1.196

Authors

Sasikumar P. Kumaraguru College of Technology, Anna University, Coimbatore, (India)
Makesh Kumar S. Government College of Technology, Anna University, Coimbatore, (India)

DOI:

https://doi.org/10.7764/RDLC.24.1.196

Keywords:

GFRP bar, fully encased composite columns, axial load, peak ductility, alkali resistant glass fiber.

Abstract

The current study investigated the axial compression behavior of fully encased composite columns (FECC) reinforced with glass fiber reinforced polymer (GFRP) bars. Totally three conventional FEC columns and three FEC columns with the addition of alkali resistant glass fiber (ARGF) made with High Strength Concrete (HSC) are tested under axial compression. The inclusion of ARGF enhances the adhesion between the concrete and the steel reinforcement in the FECC. This increased bond strength facilitates a more efficient transfer of stresses and strains, thereby improving the load-carrying capacity. The dimensions of the FEC columns are 150mm x 150mm x 1000mm, and the steel section is ISMB 50mm x 100mm. All columns were designed as per Indian Standard (IS). The main parameter was studied in axial load carrying capacity, axial-deformation response, failure mode, peak ductility, and stiffness. The experimental results of conventional FEC columns were compared to those of FEC columns with the addition of AFGR. The axial load-carrying capacity and stiffness increased by 3.77% and 32.27%, respectively, while ductility decreased by 15.46% compared to conventional FEC columns. The analytical study was conducted in all columns; the analytical results were agreed to the experimental results.

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