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Title: Experimental investigation on stub-column behavior of cold-formed high-strength steel tubular sections
Authors: Ma, JL
Chan, TM 
Young, B
Keywords: Cold-formed steel
Finite element
Geometric imperfection
High-strength steel
Residual stress
Stub column
Tubular section
Metal and composite structures
Issue Date: 2016
Publisher: American Society of Civil Engineers
Source: Journal of structural engineering, 2016, v. 142, no. 5, 4015174 How to cite?
Journal: Journal of structural engineering 
Abstract: This paper presents the experimental investigation on the compressive behavior of cold-formed high-strength steel tubular stub columns. In this paper, the nominal 0.2% proof stress of the high-strength steel was 700, 900, and 1,100 MPa. A total of 25 stub column tests on circular, rectangular, and square hollow structural sections were conducted. Geometric imperfections and load-deformation histories were reported and assessed. The experimental results were compared against the design values calculated from the Australian, European, and North American codes, and the corresponding compactness criteria were assessed. A finite-element model, which incorporated the varying material properties, was described, and the influence of geometric and material imperfections was also evaluated. The finite-element results successfully captured the experimental observations and can be adopted for future parametric studies.
ISSN: 0733-9445
EISSN: 1943-541X
DOI: 10.1061/(ASCE)ST.1943-541X.0001456
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