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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: Effect of Floor Concrete Strength on Column Strength
Author(s): Albert C. Bianchini, Robert E. Woods, and Clyde E. Kesler
Publication: Journal Proceedings
Appears on pages(s): 1149-1170
Abstract:Forty-five specimens representing portions of the corner, edge, and interior column and floor sections of a typical structure were tested under axial compressive loads and the results analyzed to determine the following: (1) how large a differential in column concrete strength and floor concrete strength could be tolerated without decreasing the load-carrying capacity of the column, and (2) the allowable load-carrying capacity of the column if this differential is exceeded. The followina variables were included: type of specimem, column concrete strength, and floor concrete strength. From the analysis of the test results, a procedure was developed for computing the ultimate load of a column in which the column concrete is intersected by floor concrete. These limited tests indicated that the column strength is a function of the ratio of column concrete strength to floor concrete strength and the number of restrained edges tributary to the column. No reduction in column strength occurred for ratios of column concrete strength to floor concrete strength up to 1.4 for all types of specimens and up to 1.5 for most types of specimens.
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