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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: Fatigue Tests of Reinforced Concrete Beams Strengthened Using Carbon Fiber-Reinforced Polymer Composites
Author(s): Sergio F. Brena, Michael A. Benouaich, Michael E. Kreger, and Sharon L. Wood
Publication: Structural Journal
Appears on pages(s): 305-313
Keywords: fatigue; fiber-reinforced; flexural strength; reinforced concrete
Abstract:In recent years, the need to rehabilitate our aging infrastructure has been recognized. The use of carbon fiber-reinforced polymer (CFRP) composites has been identified as a viable technique for use in strengthening deteriorating or structurally deficient reinforced concrete bridges. Significant research has been conducted to study the static behavior of structural elements strengthened with composites. Comparatively, very little research has been performed on the repeated-load behavior of strengthened elements. This paper presents the results of an experimental program that consisted of fatigue testing ten reinforced concrete beams strengthened using two different types of externally-bonded CFRP composites. Results indicate that bond between the composite laminates and surface of the concrete can degrade at load amplitudes corresponding to extreme load conditions for a bridge. These results indicate that an upper limit on stresses generated along the composite-concrete interface may have to be set during design to avoid premature debonding after a limited number of load cycles.
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