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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: Performance of High-Strength Concrete (HSC) Columns Confined with Rectilinear Reinforcement
Author(s): A. Azizinamini and M. Saatcioglu
Publication: Special Publication
Appears on pages(s): 213-236
Keywords: Columns (supports); confinement; high-strength concrete; reinforced
Abstract:Strength and deformability of High-Strength Concrete (HSC) columns are presented based on recent experimental and analytical research. HSC columns under concentric compression and under combined axial compression and lateral load reversals are discussed. Experimentally observed column strengths are compared with those computed based on the provisions of AC1 3 18 (1) building code and analytical models proposed for HSC columns. The results indicate that the rectangular stress block currently used for normal-strength concrete is not applicable to HSC, especially for columns under high compression where the overall response is dominated by concrete. A triangular and a modified rectangular stress block is presented. Column capacity under concentric compression is illustrated with due considerations given to early spalling of cover concrete. Axial and lateral deformabilities of HSC columns are discussed with emphasis placed on the parameters of confinement. It is shown that HSC columns conforming to the current building code requirements may exhibit ductile behavior under moderate and low levels of axial compression. Higher grade lateral reinforcement can be utilized effectively to confine HSC columns to produce improved inelastic deformability under high levels of axial compression.
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