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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: Reinforcing Steel in Concrete and the Concept of Safety
Author(s): K. Hajnal-Konyi
Publication: Journal Proceedings
Appears on pages(s): 561-580
Keywords: no keywords
Abstract:Comparative tests on 36 beams reinforced with various types of large size bars, both in ordinary and high grade concrete, prove the superiority of cold worked steel over steel having a natural yield point as regards safety factor and warning before failure. They also prove the advantage of deformed bars over plain bars regarding bond, crack formation and the necessity of increas-ing the strength of reinforcement, with improved bond, to avoid failure with-out warning. Two beams reinforced with 0.104-in. plain wires with a 268,800 psi tensile strength were also tested. Failure occurred by fracture of the reinforcement although the wires were not prestressed. Cracks were much narrower than with large size bars at comparable stresses. Strain measurements, within a very wide range of steel stresses at failure (42,500 to 294,200 psi), demonstrate good agreement with Whitney’s method of determining the position of the neutral axis.
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