ISTS18_Kurobane Lecture_Important c.pptx

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1. Contents: 1 1 Introduction 2 Material, welding and weld heat affected region 3 T-joints 4 X-joints 5 Member-rotated T- and X-joints 6 Design recommendations 7 Conclusions

2. Introduction: Why high strength steel? 1. Rising applications of high strength steel (HSS) (yield stress ≥ 460 MPa). 2. High strength steel has low carbon content (C ~ 0.1%) compared to mild steel. 3. Design rules are not available in current codes of practice for cold-formed S900 and S960 steel grades tubular joints. 4. There is an urgent need to address the challenges associated with the welding of HSS material. Standard/Guides Yield Stress (MPa) prEN 1993-1-8-2021 700 CIDECT-2009 460 IIW-2012 460 AISC 360-2022 460 S355 (IIW, 1981) S460 (IIW, 2009) S700 (EC3-1-12) S960 Material Factor = 0.9 Material Factor = 0.8 ? International Organisations in Tubular Joints: 1. IIW ( subcommission -XV-E ) 2. CIDECT 2