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Behavior of Q690 high-strength steel columns: Part 2: Parametric study and design recommendations.

Authors :
Li, Tian-Ji
Liu, Si-Wei
Li, Guo-Qiang
Chan, Siu-Lai
Wang, Yan-Bo
Source :
Journal of Constructional Steel Research. Jul2016, Vol. 122, p379-394. 16p.
Publication Year :
2016

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0143974X
Volume :
122
Database :
Academic Search Index
Journal :
Journal of Constructional Steel Research
Publication Type :
Academic Journal
Accession number :
115217581
Full Text :
https://doi.org/10.1016/j.jcsr.2016.03.027