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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: Influence of the Curvature on the Bond Force Transfer of EBR
Author(s): Wolfgang Finckh and Konrad Zilch
Publication: Special Publication
Appears on pages(s): 1-20
Keywords: Strengthening, Externally bonded reinforcement, CFRP, Bond, Intermediate debonding, Flexural strengthening, Design model
Abstract:When RC is strengthened by using externally bonded reinforcement (EBR) it is not sufficient to perform checks just for the end anchorages. The bond forces must be transferred where the load is applied. These bond forces may be transferred by the elements in between flexural cracks which are mainly influenced by the bond behavior of the internal and external reinforcement. Therefore the models which were derived from end anchorage tests must be expanded to include other effects as well. The here considered laboratory tests had shown that aside from the bond friction a self-induced contact pres-sure on the strip occurs as a result from the element's curving under load.
This article presents a model for bond force transfer which includes the increased bond strength resulting from the positive curvature of structural elements. By considering the curvature for the bond force transfer strengthened elements can be design in a more economic and safe way.
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