Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/65378
Title: Behaviour of concrete-filled cold-formed elliptical hollow sections with varying aspect ratios
Authors: Liu, F
Wang, Y
Chan, TM 
Keywords: Concrete-filled steel tubular (CFST) column
Confinement effect
Elliptical section
Stress -strain relationship
Issue Date: 2017
Publisher: Pergamon Press
Source: Thin-walled structures, 2017, v. 110, p. 47-61 How to cite?
Journal: Thin-walled structures 
Abstract: This paper presents the experimental and numerical studies of concrete-filled cold-formed elliptical hollow sections with varying aspect ratios subjected to axial compression load. Twenty one stub columns were tested to investigate the fundamental behaviours of these elliptical concrete-filled steel tubular (CFST) columns. The axial load versus displacement curves, longitudinal and transverse strains in steel tube and failure modes were obtained and discussed. A constitutive model for concrete in the elliptical CFST columns was proposed. Finite element (FE) models were developed and validated against the test results. Parametric studies were carried out to identify the influence of key parameters on the load-bearing capacity. Key parameters included aspect ratio, steel tube to concrete area ratio, yield strength of steel and compressive strength of concrete. Finally, the applicability of relevant design methods to elliptical CFST columns was assessed on the basis of the test and the FE results of this research and other related studies. Results indicated that the design method recommended in the Chinese Standard (GB50936-2014), and the design method for circular CFST columns in EC4 were found to generate accurate predictions.
URI: http://hdl.handle.net/10397/65378
ISSN: 0263-8231
EISSN: 1879-3223
DOI: 10.1016/j.tws.2016.10.013
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