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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: Behavior of Unbraced Reinforced Concrete Frames
Author(s): F. N. Rad and R. W. Furlong
Publication: Journal Proceedings
Appears on pages(s): 269-278
Keywords: columns (supports); frames; hinges (structural); lateral pressure; limit design; loads (forces); reinforced concrete; stability; strength; structural analysis; structural design; tests.
Abstract:The behavior of one-story, one-bay portions of multistory reinforced concrete frames under gravity loads plus lateral load was investigated theoretically and experimentally. Five two-column frames, three symmetrical and two unsymmetrical, were tested to failure. Theoretical analysis as well as physical tests indicate that the frames under the action of large gravity loads and lateral load be-come unstable after the formation of two "hinges" at leeward joints, either in the ends of the column or the adjacent beams. Thus, complete moment redistribution enabling the frame to form a panel mechanism under increasing lateral load is preempted by instability. The measured ultimate lateral loads were significantly greater than those predicted by "Building Code Requirements for Reinforced Concrete (ACI 318-77). "
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