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Predicting the axial load capacity of high-strength concrete filled steel tubular columns

  • Aslani, Farhad (Centre for Infrastructure Engineering and Safety, The University of New South Wales) ;
  • Uy, Brian (Centre for Infrastructure Engineering and Safety, The University of New South Wales) ;
  • Tao, Zhong (Institute for Infrastructure Engineering, Western Sydney University) ;
  • Mashiri, Fidelis (Institute for Infrastructure Engineering, Western Sydney University)
  • Received : 2014.10.31
  • Accepted : 2015.05.21
  • Published : 2015.10.25

Abstract

The aim of this paper is to investigate the appropriateness of current codes of practice for predicting the axial load capacity of high-strength Concrete Filled Steel Tubular Columns (CFSTCs). Australian/New Zealand standards and other international codes of practice for composite bridges and buildings are currently being revised and will allow for the use of high-strength CFSTCs. It is therefore important to assess and modify the suitability of the section and ultimate buckling capacities models. For this purpose, available experimental results on high-strength composite columns have been assessed. The collected experimental results are compared with eight current codes of practice for rectangular CFSTCs and seven current codes of practice for circular CFSTCs. Furthermore, based on the statistical studies carried out, simplified relationships are developed to predict the section and ultimate buckling capacities of normal and high-strength short and slender rectangular and circular CFSTCs subjected to concentric loading.

Keywords

Acknowledgement

Grant : The behaviour and design of composite columns coupling the benefits of high-strength steel and high-strength concrete for large scale infrastructure

Supported by : Australian Research Council

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