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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: Concrete Stress Distribution in Ultimate Strength Design
Author(s): Eivind Hognestad, N. W. Hanson, and Douglas McHenry
Publication: Journal Proceedings
Appears on pages(s): 455-480
Keywords: no keywords
Abstract:Test data are presented which demonstrate the reality and validity of the fundamental plasticity concepts involved in ultimate strength design theories such as those presented by Whitney, Jensen, and others. A review of earlier experimental investigations regarding the stress distribution in the compression zone of structural concrete flexural members revealed that, though many test methods have heen tried, very limited direct test data are available. On the other hand, considerable information has been derived indirectly from strength and behavior observed in tests of reinforced beams and columns. An eccentrically loaded specimen and a test method were developed which permit the flexural stress distribution to be measured. Complete information regarding the flexural stress distrihution, including stress-strain graphs with a descending curve beyond the maximum stress, is reported for w/c ratios of 1.0, 0.67, 0.50, 0.40, and 0.33 at test, ages of 7, 14, 28, and 90 days.
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