Kou kouzou rombunshuu
Online ISSN : 1884-0329
Print ISSN : 1880-9928
ISSN-L : 1880-9928
Modeling of Stress - Strain Relationships for Steel and Concrete in Concrete Filled Circular Steel Tubular Columns
Jialin TANGShin-ichi HINOIchirou KURODAToshiaki OHTA
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1996 Volume 3 Issue 11 Pages 35-46


In this paper, a stress-strain relationship in concrete which takes account of the confining effect on the filled concrete is proposed to evaluate ultimate strength and deformation capacity of concrete filled circular steel tubular columns rationally. The confining effect is quantitatively derived from the characterization between Poisson's ratio and axial strain in steel and concrete filled tube under concentric loading. The applicability of the proposed stress-strain relationship in concrete as well as the influence of strain hardening in steel is discussed. Ultimate strength, curvature and deflection of the concrete filled circular columns are calculated on the basis of the proposed model in steel and concrete, comparing with the past test results. It is concluded that the predicted relations agree quite well with the test results.

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© Japanese Society of Steel Construction
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