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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: Gripping Behavior of CFRP PrestressingRods for Novel Anchor Design
Author(s): A. Al-Mayah, K. Soudki, and A. Plumtree
Publication: Special Publication
Appears on pages(s): 209-228
Keywords: aluminum alloy; CFRP; contact pressure; copper; hardness;interfacial stress
Abstract:In prestressed concrete applications, the wedge anchor system of the CFRProd utilizes interfacial shear as the main gripping component between the rod andcontacting metal. To simulate this condition, the interfacial mechanics of CFRP-metalcouples under different contact pressures was studied. A range of CFRP rods withdifferent strengths, sizes and surface profiles was investigated. The composite rodswere in contact with either as-received or annealed aluminum alloy or copper sleeves.In all cases, the interfacial shear stress was found to increase linearly with contactpressure. High interfacial shear stresses were recorded when high strength rods wereused. The highest shear stress was obtained by removing the surface perturbations ofthe rod resulting in the increase of the real contact area. Higher load oscillations,resulting from larger amounts of wear debris, were observed when lower strength andsmooth rod surfaces were tested.
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