Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fatigue strength of longitudinal load-carrying welds in beams made of ultra-high-strength steel
Abstract The present study experimentally investigates the fatigue strength of longitudinally loaded welded joints in beam structures made of ultra-high-strength steel. Hereby, the effects of different manufacturing methods and welding preparations on the fatigue strength and the crack initiation locations of welded box and I section beams are evaluated. Specifically, experimental fatigue tests are carried out on welded these beams prepared with manual and automatic welding, and subjected to a constant amplitude four-point bending with an applied stress ratio of R = 0.1. The results show a variation in fatigue strength, whereby high performance is achieved using both single- and double-sided welds, particularly if the longitudinally continuous weld penetration is controlled by sufficient support of the weld root face. Current fatigue design codes and guidelines are applicable, albeit with some conservatism, for assessing the fatigue strength of longitudinal load-carrying welded joints made of ultra-high-strength steel.
Graphical abstract Display Omitted
Highlights Fatigue strength of longitudinal welds in ultra-high-strength steel was evaluated. Experiments on the welded hollow and I sections made of S960 grade Fatigue cracking from hot-rolled surface, weld root, and imperfections In high quality welds, the results showed higher fatigue strength than standards.
Fatigue strength of longitudinal load-carrying welds in beams made of ultra-high-strength steel
Abstract The present study experimentally investigates the fatigue strength of longitudinally loaded welded joints in beam structures made of ultra-high-strength steel. Hereby, the effects of different manufacturing methods and welding preparations on the fatigue strength and the crack initiation locations of welded box and I section beams are evaluated. Specifically, experimental fatigue tests are carried out on welded these beams prepared with manual and automatic welding, and subjected to a constant amplitude four-point bending with an applied stress ratio of R = 0.1. The results show a variation in fatigue strength, whereby high performance is achieved using both single- and double-sided welds, particularly if the longitudinally continuous weld penetration is controlled by sufficient support of the weld root face. Current fatigue design codes and guidelines are applicable, albeit with some conservatism, for assessing the fatigue strength of longitudinal load-carrying welded joints made of ultra-high-strength steel.
Graphical abstract Display Omitted
Highlights Fatigue strength of longitudinal welds in ultra-high-strength steel was evaluated. Experiments on the welded hollow and I sections made of S960 grade Fatigue cracking from hot-rolled surface, weld root, and imperfections In high quality welds, the results showed higher fatigue strength than standards.
Fatigue strength of longitudinal load-carrying welds in beams made of ultra-high-strength steel
Skriko, Tuomas (Autor:in) / Lipiäinen, Kalle (Autor:in) / Ahola, Antti (Autor:in) / Mettänen, Heli (Autor:in) / Björk, Timo (Autor:in)
28.01.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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