Numerical analysis of slender elliptical concrete filled columns under axial compression

Dai, X. H. and Lam, Dennis and Jamaluddin, Norwati and Ye, Jianqiao (2014) Numerical analysis of slender elliptical concrete filled columns under axial compression. Thin-Walled Structures, 77. pp. 26-35. ISSN 0263-8231

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Abstract

This paper presents an on-linear finite element model(FEM) used to predict the behaviour of slender concrete filled steel tubular(CFST) columns with elliptical hollow sections subjected to axial compression. The accuracy of the FEM was validated by comparing the numerical prediction against experimental observation of eighteen elliptical CFST columns which carefully chosen to represent typical sectional sizes and member slenderness. The adaptability to apply the current design rules provided in Euro code 4 for circular and rectangular CFST columns to elliptical CFST columns were discussed. A parametric study is carried out with various section sizes, lengths and concrete strength in order to cover a wider range of member cross-sections and slenderness which is currently used in practices to examine the important structural behaviour and design parameters, such as column imperfection, non-dimension slenderness and buckling reduction factor, etc. It is concluded that the design rules given in Euro code 4 for circular and rectangular CFST columns maybe adopted to calculate the axial buckling load of elliptical CFST columns although using the imperfection of length/300 specified in the Eurocode 4 might be over conservative for elliptical CFST columns with lower non-dimensional slenderness

Item Type:
Journal Article
Journal or Publication Title:
Thin-Walled Structures
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2210
Subjects:
ID Code:
68724
Deposited By:
Deposited On:
26 Feb 2014 09:16
Refereed?:
Yes
Published?:
Published
Last Modified:
26 Aug 2020 01:29