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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: Long-Term Deflections of Two-Way Slabs
Author(s): N. J. Gardner and A. Scanlon
Publication: Concrete International
Appears on pages(s): 63-67
Keywords: concrete construction; cracking (fracturing); deflection; flat concrete plates; formwork (construction); loads (forces); shoring; multistory buildings; structural analysis; two-way slabs; Construction
Abstract:Long-term deflections of two-way slab systems are highly sensitive to a number of parameters directly related to the construction process. These include construction loads arising from the shoring and reshoring procedure used, quality of the concrete placed, environmental conditions during curing, creep and shrinkage characteristics of the concrete (particularly at early ages), and placement of reinforcement. Since damage to nonstructural elements depends largely on time-dependent incremental deflections, the time of installation of the nonstructural elements and the detailing of the interface between the structural and nonstructural elements can significantly affect the serviceability of the system.
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