Theoretical Investigations on Design Approaches of Concrete Filled Steel Tubular Columns

Sankar Jegadesh J S¹, S Jayalekshmi²

¹Research Scholar, ²Associate Professor, Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu, India

Abstract

Concrete filled steel tubular (CFST) structures have been used widely in high-rise buildings and bridges due to the efficiency of structurally favorable interaction between the steel tube and the concrete core. This paper represents the analysis of experimental data corresponding to 358 specimens of concentrically loaded CFST columns (L/D ≤ 4). Test results are compared with International design code Eurocde 4 (EC4) and American Concreete Institute/Australian Standards (ACI/AS) specifications and the theoretical equations proposed by Giakoumelis and Lam(2004) and Mander, Priestley and Park's (1988) method for determining the load-bearing capacity of these composite elements. For circular cross-section columns, there is a good agreement between the test failure load and the EC4 calculation. In this paper, the influence of relative slenderness on the axial capacity of concentrically loaded circular CFST specimen is discussed.

Keywords

• Design Approach, EC4, ACI and AS, Theoretical Equations, Relative Slenderness

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Cite this Article as Follows

Sankar Jegadesh J S, S Jayalekshmi. Theoretical Investigations on Design Approaches of Concrete Filled Steel Tubular Columns. International Conference on Inter Disciplinary Research in Engineering and Technology 2014. Vol. 1. Chennai: Association of Scientists, Developers and Faculties, 2014. 122-126. Print.