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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: Loss of Prestress Due to Relaxation After Transfer
Author(s): H.N. Grouni
Publication: Journal Proceedings
Appears on pages(s): 64-66
Keywords: creep properties; post-tensioning; prestressed concrete; prestressing; prestressing steels; prestress loss; pretensioning; shrinkage; stress relaxtion; stress transfer; structural analysis.
Abstract:Expressions for direct computation of relaxation losses after transferin low relaxation and strress-relieved steels are presented. The expressions were derived by iterating the applicable pure relaxation formula with a time-related function defining the rate of plastic strains in concrete. The resulting expressions were reduced to a form comparable to those in recent codes.
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