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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: Axial Behavior and Modeling of Confined Small-, Medium-, and Large-Scale Circular Sections with Carbon Fiber-Reinforced Polymer Jackets
Author(s): Shawn A. Carey and Kent A. Harries
Publication: Structural Journal
Appears on pages(s): 596-604
Keywords: column; compression; confined concrete; dilation; Poisson’s ratio; test
Abstract:The axial stress-strain behaviors of unconfined and confined concrete differ significantly. Confined concrete shows improved compressive strength and axial strain capacity over unconfined concrete. Traditional models of confined concrete assume constant confining pressure. While these models may work well in predicting behavior of columns confined by a material behaving in a plastic manner, they do not accurately predict behavior by concrete confined by fiber-reinforced polymer (FRP) composite jackets, which are elastic to failure. An experimental program involving axial load tests of small-, medium-, and large-scale circular concrete specimens is presented to identify scale effects in the axial behavior of confined concrete. At the relatively high level of confinement provided, a scale effect is not observed as similar results were observed regardless of column size. Appropriate parameters for modeling confined concrete are presented and recommendations for the modeling and design of axially-loaded confined concrete are proposed.
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