Residual Stress Influence on the Flexural Buckling of Welded I-Girders

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Residual Stress Influence on the Flexural Buckling of Welded I-Girders

B. Launert, M. Rhode, A. Kromm, H. Pasternak, T. Kannengiesser

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Abstract. The nonlinear analysis became a common tool to precisely assess the load-bearing behavior of steel beam and column members. The failure level is significantly influenced by different types of imperfections, among geometric also structural imperfections (residual stresses). Here are still gaps in the knowledge. Nowadays, 3 D welding simulation developed to a level where it could provide reliable estimation of weld-induced distortion and residual stresses. Nevertheless, modelling and computational effort are still in a less practicable range. In this study a simplified procedure to implement residual welding stresses in continuous large scale members is proposed and the influence on the ultimate limit state of slender members in compression is evaluated for two common structural steel grades. The results showed significant improvements in the utilization of load bearing capacity compared with simplified design methods. The comparatively general approach in this study offers potential for future optimization.

Keywords
Stability Design, Finite Element Method, 2 D Welding Simulation, Inherent Strain, PDA

Published online 12/22/2016, 6 pages
Copyright © 2016 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: B. Launert, M. Rhode, A. Kromm, H. Pasternak, T. Kannengiesser, ‘Residual Stress Influence on the Flexural Buckling of Welded I-Girders’, Materials Research Proceedings, Vol. 2, pp 109-114, 2017

DOI: http://dx.doi.org/10.21741/9781945291173-19

The article was published as article 19 of the book Residual Stresses 2016

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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http://dx.doi.org/10.1016/j.jcsr.2015.08.037