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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: Repair of Columns Using Collars With
Author(s): Gary J. Klein and Albert J. Gouwens
Publication: Concrete International
Appears on pages(s): 23-31
Keywords: columns (supports); friction; load transfer;
reinforced concrete; repairs; shear strength; strength-ening.
Abstract:Concrete collars can be used in several ways to repair and strengthen concrete structures, In most applications, the critical function of the collar is to transfer vertical load to the column. Reinforcement encircling the column can be used to transfer load through shear friction. This article presents the theoretical normal force and friction coefficients for circularly reinforced appropriate Load tests simulating actual repair installations collars. the theoretical capacity. Verify
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