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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > 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.
Title: Tensile Strength of GFRP Bars Under Sustained Loading in Concrete Beams
Author(s): C.E. Bakis, T.E. Boothby, R.A. Schaut, and C.G. Pantano
Publication: Special Publication
Appears on pages(s): 1429-1446
Keywords: durability; EDS; GFRP; reinforcement bar; sustained load;tensile strength; TMA
Abstract:Glass fiber reinforced polymer (GFRP) bars were placed under load inconcrete beams for periods of time as long as three years in natural and harshenvironments. Following flexural loading, the bars were carefully extracted from thebeams and tested in order to evaluate residual tensile properties. It was found that thetensile strength decreased in the highly aggressive conditions but not in the naturalconditions. The modulus of elasticity and ultimate strain did not change appreciably inany of the four conditions. Analysis of selected bars using thermo-mechanical analysisindicated only slight effects of conditioning on glass transition temperature andtransverse coefficient of thermal expansion. Energy dispersive x-ray spectroscopyindicated no signs of damage, loss of cross section, or change in material compositionof the bars.
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