International journal of steel structures (국제강구조저널)

Korean Society of Steel Construction (한국강구조학회)
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Experimental and Numerical Studies on the Confined Effect of Steel Composite Circular Columns Subjected to Axial Load

  • Park, Kuk-Dong (Department of Civil Engineering, Inha University) ;
  • Kim, Hee-Ju (Department of Civil Engineering, Inha University) ;
  • Hwang, Won-Sup (Department of Civil Engineering, Inha University)
  • Received : 2011.05.06
  • Accepted : 2012.05.30
  • Published : 2012.06.30
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Abstract

For accurate analysis of steel composite circular columns, nonlinear material properties considering lateral confinement are required. Therefore, the material properties were modified after the experimental results from this study were compared with the results available in the literature. A nonlinear numerical analysis application, which can reflect and analyze the load-displacement, moment-curvature and P-M interaction, was developed on the basis of the modified stress-strain relation. The experimental results were compared with analysis results by using this application for concrete-filled tube (CFT) and concrete-encased tube (CET) circular columns. Results from the comparison show that the current code specifications are conservative because some of them do not consider the strength enhancement by the confined effect. This finding indicates the necessity to reflect nonlinear material properties considering the confined effect in the analysis of the composite columns.

Keywords

Acknowledgement

Supported by : Inha University

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Cited by

  1. Loading paths of confined concrete in circular concrete loaded CFT stub columns subjected to axial compression vol.156, pp.None, 2012, https://doi.org/10.1016/j.engstruct.2017.11.010