SAFEBRICTILE: Standardization of Safety Assessment Procedures across Brittle to Ductile Failure Modes

In SAFEBRICTILE a consistent procedure for safety assessment of the various failure modes relevant for steel structures is developed, covering ductile, semi-ductile and brittle modes, respectively driven by plasticity, stability and fracture. Especially for the particular situation of joining High Strength Steel (HSS) and Mild Carbon Steel (MCS) elements the present design rules, e.g. in EN 1993-1-8 lead to comparatively thick fillet and partial penetration welds. The code rules for mixed connections are insufficient due to the fact that the recent rules and safety margins are developed traditionally for standard steels and then transferred to high strength steels.

The existing data which have formed the basis for Eurocode clearly draw a dependency on the material strength fu and not on fy as some more traditional design rules assume. One of the main outcomes of former research projects was that in all cases brittle facture occurred determined obviously by the tensile strength fu of the base material but also of the filler metal. This is presumed to be also the case for mixed connections which are not yet covered in EN 1993-1-8 or EN 1993-1-12 appropriate. On the basis of these knowledge further investigations on mixed connections are needed to set up a comprehensive data base for the statistical evaluation of brittle failure modes.

Coordinator: Universidade de Coimbra

Institut für Konstruktion und Entwurf, Universität Stuttgart
Leiterin der Forschungsstelle:
Prof. Dr.-Ing. U. Kuhlmann
Projektbearbeiter: Dipl.-Ing. Andreas Kleiner

Technische Universitteit Eindhoven

European Convention for Constructional Steelwork Vereiging

Arcelormittal Delval & Differdange Sa

Wir danken dem Forschungsfonds für Kohle und Stahl (RFCS) der Europäischen Union für die Förderung dieses Forschungsprojekts.

2013 - 2016