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Fatigue Performance of High- and Low-Strength Repaired Welded Steel Joints

Schubnell, Jan; Ladendorf, Phillip 1; Sarmast, Ardeshir; Farajian, Majid; Knödel, Peter 1
1 Karlsruher Institut für Technologie (KIT)

Abstract:

Large portions of infrastructure buildings, for example highway- and railway bridges, are steel constructions and reach the end of their service life, as a reason of an increase of traffic volume. As lifetime extension of a commonly used weld detail (transverse stiffener) of these structures, a validated approach for the weld repair was proposed in this study. For this, welded joints made of S355J2+N and S960QL steels were subjected to cyclic loading until a pre-determined crack depth was reached. The cracks were detected by non-destructive testing methods and repaired by removal of the material around the crack and re-welding with the gas metal arc welding (GMAW). Then, the specimens were subjected to cyclic loading again. The hardness, the weld geometry, and the residual stress state was investigated for both the original- and the repaired conditions. It was determined that nearly all repaired specimens reached at least the fatigue life of the original specimen.


Verlagsausgabe §
DOI: 10.5445/IR/1000134557
Veröffentlicht am 30.06.2021
Originalveröffentlichung
DOI: 10.3390/met11020293
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Versuchsanstalt für Stahl, Holz und Steine (VAKA)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2075-4701
KITopen-ID: 1000134557
Erschienen in Metals
Verlag MDPI
Band 11
Heft 2
Seiten 293
Vorab online veröffentlicht am 08.02.2021
Schlagwörter fatigue; repair welding; residual stress; non-destructive testing
Nachgewiesen in Dimensions
Web of Science
Scopus
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