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Title: Implementation of GFRP-Reinforced Concrete Draft Code Provision (PrePublished)

Author(s): Isaac Higgins, Vicki Brown, and Brendan Kearns

Publication: Symposium Paper

Volume: 356


Appears on pages(s): 131-151

Keywords: GFRP; internal reinforcement; codes; design guidelines; design issues; case studies

DOI: 10.14359/51737189

Date: 8/26/2022

The American Concrete Institute (ACI) currently has an approved design guideline for FRP-reinforced concrete - ACI 440.1R-15 Guide for the Design and Construction of Structural Concrete Reinforced with FRP Bars. Work is in progress to develop a consensus-based design code for GFRP-reinforced concrete consistent with ACI 318-19 where possible. The code language will generally follow the principles developed in the ACI 440.1R-15 Guide, with a number of significant changes that have resulted from more recent research (e.g. changes to design limits) and the need to develop provisions in areas that ACI 440.1R-15 does not address (e.g. requirements for torsion). The proposed changes have not yet been vetted in practical design situations, so their impact is still to be fully explored. Design examples have been developed to follow the draft code language from ACI’s website for public review and comment. Their solutions are examined to understand the impact that proposed code language may have on the design of GFRP-reinforced concrete members. This paper discusses selected design examples to (1) provide evidence for proposed draft code provisions that can be practically implemented in typical design situations, and (2) identify situations in which proposed draft code language may require modification.