ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Strength Model for Concrete Columns Reinforced with Fiber-Reinforced Polymer Bars and Ties

Author(s): Hany Tobbi, Ahmed Sabry Farghaly, and Brahim Benmokrane

Publication: Structural Journal

Volume: 111

Issue: 4

Appears on pages(s): 789-798

Keywords: column; confinement model; fiber-reinforced polymer; steel; volumetric ratio

DOI: 10.14359/51686630

Date: 7/1/2014

Abstract:
Few studies are available on members reinforced internally with fiber-reinforced polymer (FRP) bars and subjected to compressive axial load; therefore, the behavior of FRP internally reinforced concrete columns has not been well established. In this paper, experimental results of 23 nearly full-scale square concrete columns reinforced transversally with glass FRP (GFRP) and carbon FRP (CFRP) ties, and longitudinally with GFRP, CFRP, and steel bars, and subjected to concentric monotonic axial compression were used to develop a strength model. Experimental results showed that FRP ties significantly increased concrete strength and ductility. The proposed confinement model for this new FRP application takes into consideration transverse reinforcement volumetric ratio, strength, spacing, and configuration, as well as longitudinal bar distribution. The proposed strength model provides good predictions of stress and strain with respect to the experimental results.