Title:
Behavior of Concentrically Loaded Fiber-Reinforced Polymer Reinforced Concrete Columns with Varying Reinforcement Types and Ratios
Author(s):
Hany Tobbi, Ahmed Sabry Farghaly, and Brahim Benmokrane
Publication:
Structural Journal
Volume:
111
Issue:
2
Appears on pages(s):
375-386
Keywords:
column; concentric compression; confinement volumetric stiffness; failure mechanism; fiber-reinforced polymer (FRP); steel; volumetric ratio
DOI:
10.14359/51686528
Date:
3/1/2014
Abstract:
Fiber-reinforced polymer (FRP) materials have proven their effectiveness as an alternative reinforcement for concrete structures in severe environmental conditions. Many studies have investigated the flexural and shear behaviors of FRP-reinforced concrete beams and slabs. Limited research, however, has gone into investigating the behavior of internally reinforced FRP concrete columns. This paper reports the experimental investigation of the compressive performance of concrete columns reinforced longitudinally with FRP or steel bars and with FRP as transverse reinforcement. Twenty concrete columns measuring 350 x 350 x 1400 mm (13.8 x 13.8 x 55.1 in.) were constructed and tested under concentric compressive load. The parametric study included variables such as transverse reinforcement configuration, material type and spacing, longitudinal reinforcement ratio, and confining volumetric stiffness. Results showed that FRP bars have contribution as longitudinal reinforcement for concrete columns subjected to concentric compression and that the combination of FRP transverse reinforcement and steel longitudinal bars offers acceptable strength and ductility behavior.