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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: Ultimate Strength Behavior Study by Regression Analysis of Beam Test Data
Author(s): Theodore C. Zsutty
Publication: Journal Proceedings
Appears on pages(s): 635-654
Abstract:Regression analysis of ultimate moment test data is used to determine median prediction equations for the modes of moment tension and moment compression failure. The coefficient of variation of test results about the predicted values is small enough to indicate that the method and the selected mathematical form are able to produce equations which accurately represent the true behavior of the test data. The equations for each failure mode are set equal to each other to determine equations for the balanced steel ratio and the balanced relative moment. The nearly constant value for the balanced relative moment agrees well with test beam behavior and is compared with present design procedure values. The equation for moment tension failure is compared graphically with present design equations, and the resulting general agreement provides additional verification of the validity of the equations derived by both methods.
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