Journal article

Behaviour and design of high strength CFST columns with slender sections

Tan-Trac Nguyen, Huu-Tai Thai, Tuan Ngo, Brian Uy, Dongxu Li

JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH | ELSEVIER SCI LTD | Published : 2021

Abstract

The behaviour of high strength concrete-filled steel tube (CFST) columns with slender sections under concentric loading is experimentally explored in this study. The test program includes a series of six CFST columns made of welded built-up square tube with very high strength materials and different width-to-thickness ratios. The performance of these specimens is evaluated under compression based on their failure mode, ultimate strength, strain development and axial load-shortening relationship. Moreover, a numerical model is developed considering the influence of initial local imperfections, residual stress of the steel tube and material models are proposed for composite columns. The finite..

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Grants

Funding Acknowledgements

This paper was financially supported by the University of Melbourne and the experiments were conducted at the University of Melbourne and the University of Sydney. Thanks are given to the assistance of Mr. Ray Furmston, Dr. Mark Betar and Dr. Jinghan Lu at the University of Melbourne and Dr. Jia Wang at the University of Sydney. The authors are also grateful to the raw material support from BASF Australia Ltd., Independent Cement and Lime Pty Ltd. and HiQuality Group.