Title: Experimental Study on Seismic Behavior of Concrete Columns Reinforced with Glass Fiber-Reinforced Polymer Bars

Author(s): W. M. Souza, J. R. Correia, J. P. Firmo, J. Almeida, I. C. Rosa, and A. A. Correia

Publication: Structural Journal

Volume: 121

Issue: 4

Appears on pages(s): 131-148

Keywords: axial load level; concrete columns; confinement; cyclic loading; energy dissipation; experimental study; glass fiber-reinforced polymer (GFRP) reinforcement; GFRP ties; seismic behavior

DOI: 10.14359/51740714

Date: 7/1/2024

Abstract:
This paper presents an experimental study of the seismic behavior of concrete columns reinforced with glass fiber-reinforced polymer (GFRP) bars. Seven full-scale square columns were tested under sustained compressive axial loading combined with monotonic or cyclic lateral loading. The test program included two types of reinforcement (GFRP and steel bars) and different axial load levels (0, 20, and 33% of the axial capacity). The experiments showed that GFRP reinforcement could be used in concrete columns subjected to lateral loads, provided that ties are capable of properly confining the concrete core up to failure, thereby contributing to improving their deformation and energy dissipation capacity. Tests also confirmed the influence of the axial load level on the loadbearing capacity, deformation, and energy dissipation capacity of GFRP-reinforced concrete columns.