Fatigue experiments on connections made of very high strength steels
conference paper
An effective application of Very High Strength Steels (VHSS) can be expected in truss-like structures, typically made of hollow sections. Improved design of VHSS truss structures could incorporate the application of cast joints, since an appropriate design of cast joints limits the stress concentrations in the joint and welds are shifted out of critical zones. The main objective of the research was to determinate the fatigue strength of welded connections made of VHSS. Truss specimens made of circular hollow sections (CHS) and cast joints were fatigue tested. In the Vgirth- welded connections of cast steel joints and CHS made of S690-G10MnMoV6-3 and S890- G18NiMoCr3-6, weld root cracks were initiated by applying cyclic loading. The fatigue results of the truss specimens exceeded detail class 71, although the detail class for girth welds is only valid for wall thickness t < 12,5 mm, whilst the average wall thickness of the specimens was 23 mm.
TNO Identifier
525544
ISBN
9783857481239
Publisher
International Association for Bridge and Structural Engineering (IABSE)
Source title
Assessment, Upgrading and Refurbishment of Infrastructures
Pages
1-8
Files
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