Journal
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
Volume 213, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jcsr.2023.108328
Keywords
Fracture; Ductile tearing; Circular-hollow-section joint; Reversed loading; Strain; Failure assessment diagram
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This article translates the ductile tearing process of welded joints made from circular hollow sections into the load resistance and strain levels, providing an interface between fracture-mechanics based assessments and engineering analysis and monitoring.
This article aims to predict the load versus crack growth (P -Delta a) and strain versus crack extension (epsilon -Delta a) relations in the ductile tearing process of welded joints made from circular hollow sections (CHS). The experi-mental program includes fracture tests on monotonically and cyclically loaded CHS joints, with a fatigue crack near the weld toe, under axial loadings applied in the brace. Coupled with the tearing assessment diagram, this study integrates fracture resistance curves measured directly from joints and that from a fracture specimen under monotonic and reversed loadings in the experimental procedure. The tearing assessment estimates the evolution of the load resistance and the nominal strain versus the crack extension, both showing satisfactory agreement with the experimental results. This study translates the ductile tearing process into the load resistance and strain levels, which provides an interface between the fracture-mechanics based assessments and the engineering analysis and monitoring.
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