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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: Flexural Behavior of Confined Concrete Columns
Author(s): Shamim A. Sheikh and C. C. Yeh
Publication: Journal Proceedings
Appears on pages(s): 389-404
Keywords: axial loads; bending moments, columns (supports); confined concrete; ductility; earthquakes; flexural strength; reinforced concrete; strains; stress block; stress-strain relationships; structural analysis; structural design; tied columns; ties.
Abstract:An analytical model originally developed for determining the stress-strain curve of confined concrete under concentric compression has been extended to include the effects of strain gradient caused by flexture. The proposed model along with some other models available in the literature is used to predict the behavior of several specimens tested by various researchers including those recently tested at the University of Houston. To simplify the application of the model, a rectangular stress block representing the actual stress-strain curve is proposed. A procedure to determine the dimensions of the stress block is presented. The provisions of Appendix A of the ACI Build-( 318-83) for the confinement steel in ductile frame columns are critically examined.
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