Abstract

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Title:: Research on Hysteretic Performance for Box Node Domain Extended End-plate Weak-axis Connection

Author(s):: LU Lin-feng; ZHONG Li-li; HU Ben-feng; LIN Jian-jun; School of Civil Engineering, Chang’an University

Keywords:: box node domain; weak axis end-plate connection; semi-rigid node; hysteretic performance

Abstract:: A new box node domain extended endplate weak axis connection suitable for H-section connection was put forward, eight different models of the end-plate connection were studied by finite element software ABAQUS. The failure mode of node, the moment-rotation curve, ultimate bearing capacity and energy dissipation capacity were analyzed. The results show that the eight models are semi-rigid nodes; under cyclic loading, the failures of the box node domain endplate connections are present in the end-plate, and the column is substantially in elastic state; when the story drift angle is 0.04 rad, the respective bearing capacities of the nodes are higher than 0.8 times of whole section plastic moment; although the ultimate bearing capacity of the end plate with extended stiffener has increased about 10%, the energy dissipation capacity has decreased 4%, so extended endplate stiffener is not provided; when the end-plate thickness is 16 mm, that is, the thickness difference between the end-plate and the skin plate is small, the bearing capacity and energy dissipation capacity of nodes are better; enhancing the properties of end plate can improve the load carrying capacity, but the node energy dissipation capacity will reduce if end-plate properties are increased too more, so it is recommended that the properties of end-plate are increased only one grade.