Stress-strain states of welded beam-to-column connections with geometrical and metallurgical notches. (April 2020)

• Record Type: Journal Article
• Authors: Zhou, Z.G.; Chen, M.M.; Ma, C.Z.
• Is Part Of: Journal of constructional steel research. Volume 167(2020)
• Publication Date: 2020-04
• Subjects: Beam-to-column connection -- Welded -- Fracture -- Notch -- Plastic strain -- Stress triaxiality; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2019.105745
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: Considering the significant brittle fractures of the beam-to-column welded joints in past earthquakes, it is essential to study the plastic deformation capacity of these welded joints under random loads. But the plastic deformation capacity is of much uncertainty in the past experimental data due to weld. The purpose of this paper is to establish some artificial notched specimens without weld instead of welded specimens to avoid the weld caused uncertainty. Seven typical slice specimens are extracted from investigations of welded joints of steel beam-to-column connections with geometrical and metallurgical notches. The stress-strain states of the notch models were studied by FEM analysis. Then notched specimens made of base metal, which are called equivalent models, are designed for representing the stress-strain states of the actual connections. Thus the artificial notched specimens can be used to test and analyze the plastic deformation capacity instead of the actual welded joints with highly random mechanical properties. Highlights: Seven FE models of typical slice specimens from welded connections are established to obtain their stress-strain states. To represent the stress-strain states of the actual connections, some artificial notched specimens are studied. The artificial notched specimens can reproduce the stress-strain levels of the actual welded connections. The artificial notched specimens are established without weld to avoid the weld caused uncertainty.