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

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 usin...

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Bibliographic Details
Published inACI structural journal Vol. 120; no. 5; pp. 93 - 107
Main Authors Hussain, Zahid, Nanni, Antonio
Format Journal Article
LanguageEnglish
Published Farmington Hills American Concrete Institute 01.09.2023
Subjects
Analysis
Aspect ratio
Building codes
Building law
Compressive strength
Concrete
Concrete columns
Concrete properties
Cross-sections
Design
Eccentricity
Fiber reinforced concretes
Fiber reinforced polymers
Fibrous composites
Glass fiber reinforced plastics
Modulus of elasticity
Polymers
Reinforced concrete
Reinforcement
Reinforcing steels
Tensile properties
United States
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Summary: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 ([E.sub.f] = 6500 ksi), and high-modulus ([E.sub.f] = 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. Keywords: building code; concrete columns; eccentricity; glass fiber-reinforced polymer (GFRP) reinforcement.
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ISSN:0889-3241
0889-3241
1944-7361
DOI:10.14359/51738838