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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: Balanced Design of Prestressed Concrete Beams
Author(s): Henry J. Cowan
Publication: Journal Proceedings
Appears on pages(s): 773-784
Keywords: no keywords
Abstract:Equations are derived for the design of prestressed sections to develop the full value of permissible stresses in concrete both at the top and bottom of the beam during the prestressing operation as well as under the action of superimposed loads. A simple solution is obtained if the maximum permissible stresses are the same during the prestressing operation and under load. The more complicated solution for differential permissible stresses, however, gives greater economy in materials. Two examples are worked out, which demonstrate that balanced design is primarily useful for the heavily loaded beam and the beam with restricted depth.
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