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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: Flexural Cracking of Concrete Flat Plates
Author(s): Jan C. Jofriet
Publication: Journal Proceedings
Appears on pages(s): 805-809
Keywords: concrete slabs; crack width and spacing; crack-ing
(fracturing); flat concrete plates; flexural strength; ser-viceability;
Abstract:Serviceability of concrete flat plates is examined. It is shown that the high negative moments that occur in the vicinity of the support columns may lead to excessively wide cracks and high local steel stresses if the negative column strip reinforcement is evenly distributed over the width of the column strip. A design check on serviceability is difficult to carry out unless the magnitude of the actual service load moments is known. It is suggested that a code provision that requires twice as much top steel to be placed in the center half than in the remaining part of the column strip region would enhance the serviceability performance of concrete flat plates.
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