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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: Fully and Partly Prestressed Reinforced Concrete
Author(s): P. W. Abeles
Publication: Journal Proceedings
Appears on pages(s): 181-216
Abstract:In this paper it is intended to show the distinction between fully and effectively partly prestressed con- employing high strength steel. The various systems and methods are described pre-stretching and post-stretching being distinguished. The losses of the initial prestress are discussed and formulas are derived for the factor of safety against cracking and for the minimum stretching force to ensure full prestressing, to be reduced for partial pre- stressing to such extent that dangerous cracks are avoided. Published comparative test results of pre- stressed and conventionally reinforced beams are discussed and some new data are presented regarding preliminary comparative tests on beams reinforced with high tensile wire. It is shown that a partly pre-stressed beam, having a reinforcement of about one fifth of that required for mild steel, behaves similarly to a conventionally reinforced beam, when under working. load, and similarly to a fully prestressed beam (i.e. remaining crackless), when the load IS .
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