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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: The Structural Effectiveness of Protective Shells on Reinforced Concrete Columns
Author(s): F. E. Richart
Publication: Journal Proceedings
Appears on pages(s): 353-364
Abstract:Presents a study of 108 plain, tied, or spirally re- inforced concrete columns. The columns were 7, 8, and 9 in. round or square, 45 in. long, and the ties and spirals were 6 in. in diameter. The columns were loaded axially, with "flat" ends. Strains were measured and close observations were made of the initial failure of the protective shell. Analyses of the test results were made to see if case with the shells of spirally reinforced columns, but the tied columns showed a slight deficiency in the strength expected on the basis of previous tests of the 193- ACI columns investigation. The test results lend support to the design methods prescribed in the current ACI building regulations for reinforced concrete.
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