Static tensile tests were conducted on 26 butt welded joints on base steel of Q690 grade high-strength steel, which exhibits softening behaviour in the heat-affected zone (HAZ). Considering the challenges involved in simulating the butt weld with the HAZ, a new method was proposed for calibrating the true stress–strain relationship based on a trial-and-error approach using simulation through comparing the load–deformation response for three materials (base metal, weld metal and HAZ) in a butt weld. Good consistency on the load–deformation response between the simulation and the test was observed, validating the proposed method. Parametric study showed that the relative width of the softened zone and matching ratio have a significant influence on the ultimate strength of the butt weld and BS EN 1993-1-12 cannot be used directly to design a butt weld with a soft interlayer in the HAZ of high-strength steel.
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August 2018
Research Article|
October 02 2017
Experimental and numerical study of high-strength steel butt weld with softened HAZ
Feifei Sun, PhD;
Feifei Sun, PhD
Professor, State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, P.R. China (corresponding author: ffsun@tongji.edu.cn)
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Mingming Ran, BS;
Mingming Ran, BS
PhD Candidate, College of Civil Engineering, Tongji University, Shanghai, P.R. China
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Guoqiang Li, PhD;
Guoqiang Li, PhD
Professor, State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, P.R. China
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Robert Y. Xiao, PhD;
Robert Y. Xiao, PhD
Professor, London South Bank University, London, UK
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Yan Wang, BS
Yan Wang, BS
Welding Engineer, Technical Department, BAOSTEEL Construction Co., Ltd, Shanghai, P.R. China
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Publisher: Emerald Publishing
Received:
May 06 2017
Accepted:
August 11 2017
Online ISSN: 1751-7702
Print ISSN: 0965-0911
ICE Publishing: All rights reserved
2017
Proceedings of the Institution of Civil Engineers - Structures and Buildings (2018) 171 (8): 583–597.
Article history
Received:
May 06 2017
Accepted:
August 11 2017
Citation
Sun F, Ran M, Li G, Xiao RY, Wang Y (2018), "Experimental and numerical study of high-strength steel butt weld with softened HAZ". Proceedings of the Institution of Civil Engineers - Structures and Buildings, Vol. 171 No. 8 pp. 583–597, doi: https://doi.org/10.1680/jstbu.16.00102
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