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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: Deflection of Cracked Prestressed Concrete Members
Author(s): Maher K. Tadros and Amin Ghali
Publication: Special Publication
Appears on pages(s): 137-166
Keywords: beams (supports); cracking (fracturing); creep
properties; deflection; partial prestressing; prestressed
concrete; prestress loss; shrinkage; stress relaxation;
Abstract:A manual calculation procedure is presented for predic-tion of deflection of partially prestressed beams. Adequate accur-acy is achieved by accounting for the important parameters affecting the deflection: creep and shrinkage of concrete, relaxation of pre-stressed steel, cross section areas and locations of prestressed and nonprestressed steel and cracking at the sections where the tensile strength of concrete is exceeded. Design aids are presented to sim-plify calculation of properties of cracked sections. Numerical exam-ples are included.
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