Advanced Steel Construction

Vol. 14, No. 2, pp. 184-205 (2018)


FLEXURAL BUCKLING DESIGN OF FABRICATED

AUSTENITIC AND DUPLEX STAINLESS STEEL COLUMNS

 

Yang-Lu1,*, Zhao-Menghan1, Chan-Takming2 and Shang-Fan1

1The College of Architecture and Civil Engineering; Beijing University of Technology, Beijing 100124, China

2 Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR

*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)

Received: 29 September 2016; Revised: 13 February 2017; Accepted: 16 April 2017

  

DOI:10.18057/IJASC.2018.14.2.4

 

ABSTRACT:

This paper presents a numerical investigation on the flexural buckling design of fabricated austenitic and duplex stainless steel columns. Complementary experimental investigation was conducted and the numerical modelling methodology was validated against the complementary experimental database. The target parametric study was carried out to assess the influence of initial geometric imperfections, residual stress patterns, mechanical properties, local cross-section slenderness and global slenderness on the structural behaviour. A total of 968 FEA results were developed which included 301 welded box-section and 667 welded I-section columns. The resulting structural performance data were collated to assess the reliability of the current design provisions - EN 1993-1-4 and ASCE 8-02. Results indicate the conservatism on current practices. Improved design provisions were proposed based on the Direct Strength Method, ASCE 8-02 and Perry formulae.

 

Keywords:

Flexural buckling design, parametric analysis, reliability analysis, stainless steel, columns

 

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