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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: Moment Redistribution in Flat Plate Floors
Author(s): B. Vijaya Rangan and A. S. Hall
Publication: Journal Proceedings
Appears on pages(s): 601-608
Keywords: flat concrete plates; floors; loads (forces); moment distribution;
reinforced concrete; reinforcing steels; structural analysis; structural design.
Abstract:Reinforced concrete structures are capable of significant redistribution of internal forces between the untracked state and maximum load. Results obtained from tests on large-scale models of edge panels of reinforced concrete flat plate floors subjected to uniformly distributed vertical load are presented. Test results showed that between the untracked condition and the maximum load there was a considerable redistribution of moments, the two support moments and the midspan moments varying by about 50 percent. This suggests that in the design process, any analysis involving a high degree of refinement is quite unnecessary and bears no relation to reality. The tests also indicated high moment intensity opposite the column face with a substantial drop in moment just beyond. Based on this study, simple rues for the design of reinforcement in edge panels of flat plate floors are proposed.
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