Welded connections at high‐strength steel hollow section joints

Abstract The calculation of the loadbearing capacity hollow section joints using design formulas according to EN 1993‐1‐8 assumes full‐strength welded connections if non‐linear stress distribution over circumference is not covered by calculation. Sufficient ductility in ensures a plastic redistribution within each joint. In case structures made high‐strength steels, it becomes more difficult meet requirement for welds as yield strength base material increases. This article begins with summary current rules and execution joints. softening behaviour steels local HAZ are then discussed. That followed presentation results from AiF‐FOSTA research project P1020 regarding influence manufacturing parameters on properties HAZ. experimental test programme single‐sided T‐connections parameter studies P1453 also described. Finally, approach presented account failure hybrid modes connections.