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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: Equivalent Frame Analysis Improvements
for Slab Design
Author(s): S. K. Sharan, D. Clyde, and D. Turcke
Publication: Journal Proceedings
Appears on pages(s): 55-59
Keywords: building codes; columns (supports); concrete slabs; elastic analysis; finite element method; frames; loads (forces); reinforced concrete; stiffness; structural analysis; structural design; torsion.
Abstract:A improved equivalent frame method is proposed. It is demonstrated analytically that the equvilant member stiffness depended primarily whether the slab or column is loaded. This conclusion is supported by both numerical and experimental evidence. For both the column-loaded case it was found that the column stiffness should be increased. This is contrary to the ACI 318-71 assumption of a reduced effective stiffness. Using the results of an in-depth numerical analysis of numerous slab-column structures, convenient design curves are provided to obtain equvilant member stiffnesss directly. Comparitive results are shown between the current ACI method, the proposed scheme, and the experimental results. The proposed method is found to produce results in close agreement with the experimental results.
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