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: Design of Glass Fiber-Reinforced Polymer-Reinforced Concrete Columns per ACI CODE-440.11-22

Author(s): Zahid Hussain and Antonio Nanni

Publication: Structural Journal

Volume: 120

Issue: 5

Appears on pages(s): 93-107

Keywords: building code; concrete columns; eccentricity; glass fiber-reinforced polymer (GFRP) reinforcement

DOI: 10.14359/51738838

Date: 9/1/2023

Abstract:
This paper is an attempt at a better understanding of design provisions of ACI CODE-440.11-22, building code for the design of glass fiber-reinforced polymer (GFRP)-reinforced concrete (RC) columns. Sway and a non-sway column examples originally designed with steel reinforcement were redesigned using GFRP longitudinal bars and ties as per provisions of ACI CODE-440.11-22 to analyze the effect of changing reinforcement type. Columns were designed with both low-modulus (Ef = 6500 ksi), and high-modulus (Ef = 8700 ksi) GFRP bars. A parametric study was carried out by varying the concrete compressive strength, the cross-section aspect ratio, and the resultant load eccentricity. GFRP-RC columns require larger cross-section dimensions and more reinforcement area than steel-RC columns irrespective of the GFRP elastic modulus when subjected to the same demand. The concrete strength has a significant effect on the dimensions of GFRP-RC columns, and rectangular sections were found to be more efficient than square sections with the same gross concrete area in the presence of moment. GFRP-RC columns subject to high eccentricity loads take advantage of GFRP tensile properties and, thus, are more efficient.