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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: Design of Slender Concrete Columns
Author(s): James G. MacGregor, John E. Breen, and
Edward 0. Pfrang
Publication: Journal Proceedings
Appears on pages(s): 6-28
Keywords: bending moments; building codes;columns (supports) ; frames; long columns; reinforced concrete; slenderness ratio; strength; structural analysis; structural design; ultimate strength.
Abstract:Offers a proposal for revising the slender column design procedures of the 1963 ACI Code. Proposes the use of a rational second-order structural. analysis wherever possible or practical. In place of such an analysis, an approximate design method based on a moment magnifier principle and similar to the procedure used under the AISC Specifications is proposed. An outline of the normal range of variables in column design and a lower limit of applicability is proposed which will eliminate over 90 percent of columns in braced frames and almost half of columns in unbraced frames from consideration as slender columns. Through a series of comparisons with analytical and test results, the accuracy sign procedure is establish of the approximate deed.
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