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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: Strength Reduction Factors for Flexural Design of Concrete Beams Prestressed with Fiber-Reinforced Plastic Tendons
Author(s): S.-M. Jeong
Publication: Special Publication
Appears on pages(s): 791-806
Keywords: beam; concrete; ductility; reinforcement; tendon
Abstract:Current codes of reinforced concrete design, mainly concerned with ductile steel reinforcements, do not yet address the use of brittle FRP (Fiber Reinforced Plastic) tendons. In order to use them more frequently in structural applications in industry, reliable design methods and code coefficients should be established, taking into account the material properties. This paper discusses the flexural design of concrete beams prestressed with FRP tendons with emphasis on the strength reduction factors in the USD (Ultimate Strength Design Method). According to the code requirements, the reduction factor should consider the degree of ductility. New reduction factors for the flexural design are recommended based on a reliability analysis, in which the target reliability indices have been set in due consideration of the ductility. The recommended factors range from 0.7 to 0.9 depending upon the degree of ductility. The factors are lower than that (=0.9) of beams with steel reinforcements, allowing for the possible lack of ductility in beams with FRP tendons.
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