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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: Plastic Mechanism Design of Unbraced Low-Rise
Author(s): F. N. Rad and T. J. Gavin
Publication: Journal Proceedings
Appears on pages(s): 321-328
Keywords: columns (supports); frames; hinges (structural); limit design
method; reinforced concrete; strength; structural design; ultimate strength
Abstract:Applicability of limit design concepts to design of low-rise unbraced concrete frames is investigated. Two pairs of frames to represent the lowest level of a 5- and 7-story structure were designed and tested under column, beam, and lateral loads. In each pair, one frame was designed by the ultimate strength design method, and the other by a limit design method. "Building Code Requirements for Reinforced Concrete (ACI 318- 77)" provisions were followed in the design and detailing of frame cross sections, Measured frame capacities exceeded the design loads by an average of 53 percent and 26 percent for frames designed by the ultimate strength design method and the limit design method, respectively. Analytical and experimental results indicate that it is feasible to use limit design methods employing a plastic mechanism approach in designing low-rise unbraced concrete frames.
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