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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: High-, Medium-, and Low-Strength Concretes Subject to
Sustained Overloads-Strains, Strengths, and Failure
Author(s): Mohammad M. Smadi, Floyd 0. Slate, and Arthur H. Nilson
Publication: Journal Proceedings
Appears on pages(s): 657-664
Keywords: compressive strength; concretes; cracking (fracturing); creep prop-erties;deformation; failure mechanisms; high-strength concretes; loads (forces);strains; stresses.
Abstract:The behavior of high-strength concrete subject to high sustained compressive stresses was studied experimentally and compared with that of low- and normal-strength concretes. Various forms of stress-strain time relationships were obtained. The long-term sustained strengths were established for these materials and were found to be preater (as percent off,’ > for high-strength than for low-strength concretes by about .5 to 10 percent. The time-dependent deformations were maximum at the vicinity of the sustained strength and were greater the lower the strength of concrete. A hypothesis on the mechanism of failure under sustained loading is presented which states that a critical stage of cracking is initiated by high sustained loads on attaining a critical strain limit that correlates closely with strain at maximum stress in short-time tests.
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