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Title: Behavior of Q690 high-strength steel columns : part 2 : parametric study and design recommendations
Authors: Li, TJ
Liu, SW
Li, GQ
Chan, SL 
Wang, YB
Keywords: Design
High-strength steel
Numerical analysis
Residual stress
Welded sections
Issue Date: 2016
Publisher: Elsevier
Source: Journal of constructional steel research, 2016, v. 122, p. 379-394 How to cite?
Journal: Journal of constructional steel research 
Abstract: Prediction of the column strength, associated with buckling and material yielding, is vital in a successful design. In this paper, a completely numerical analysis technique is employed for simulating the compressive behavior of Q690 high-strength steel columns with box- and H-sections, and its accuracy is verified by the experimental results as presented in the part 1 of the companion papers. To this, the curved Pointwise-Equilibrating-Polynomial (PEP) is introduced for representing the column deformations with an explicit simulation on the member initial imperfection. Further, the refined plastic hinge model combined with the use of sectional yield surfaces is employed to reflect inelastic yielding at the critical location. A cross-sectional analysis approach allowing for residual stresses modeling is also incorporated into the numerical method. Sequentially, a parametric study is conducted extensively for the Q690 high-strength steel welded columns. At last, the buckling curves from Chinese (GB 50017-2003), European (Eurocode 3), and American (ANSI/AISC 360-10) codes are examined, and some recommendations for design of Q690 high-strength steel columns are presented.
ISSN: 0143-974X
EISSN: 1873-5983
DOI: 10.1016/j.jcsr.2016.03.027
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