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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: Analysis and Design of Elementary Prestressed Concrete Members
Author(s): Herman Schorer
Publication: Journal Proceedings
Appears on pages(s): 49-88
Abstract:The purpose of this paper is to outline the analysis and design of elementary prestressed concrete mem- bers, such as beams, columns, ties, etc., subjected to Internal and external axial forces and bending mo- ments. The internal stresses, caused by the action of the prestress forces, are combined with the stresses due to external loads in three typical loading stages The first stage considers the stress condition result: ing from the simultaneous application of all sus- tained loads. The second stage determines the stress changes due to normal live loads based on a truly monollthlc participation of the entire concrete area The third stage assumes a cracked tension zone which’ condition introduces the derivation of ultimate stresses and clarifies the influence of the prestress action on the type of failure. The analytical expressions are simplified by convenient ratios, which essentially de- fine the sectional shape, the effective steel prestress and the concrete fiber stresses. Numerical examples serve to illustrate the various steps.
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