Stress-strain states of welded beam-to-column connections with geometrical and metallurgical notches

摘要

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. (C) 2019 Elsevier Ltd. All rights reserved.