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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: Instantaneous and Long-Time Deflections of Reinforced Concrete Beams Under Working Loads
Author(s): Wei-Wen yu and George Winter
Publication: Journal Proceedings
Appears on pages(s): 29-50
Abstract:The availability of high strength steels and concretes and the acceptance of ultimate strength design have made it possible to-utilize much shallower flexural members than the wst. The laraer deflections of such members make it imperative for the designer to possess si mple and reliable methods for pre -computing the expected deflections. This refers not only to deflections immediately upon load application, but also, and particularly, to long-time deflections under sustained loads. This paper presents two simple methods, each, for calculating instantaneous and long-time deflections under service loads. The methods are checked against the results of 175 deflection tests from nine different investigations. Agreement is found to be uniformly satisfactory for design purposes.
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