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提出了一种新型空间半刚性C型节点。为使该节点具有较好的转动能力及耗能能力,基于“强节点、弱构件”的抗震基本原则,提出了“强连接、弱板件”的空间半刚性节点。首先根据规范及理论分析初步确定节点各组件的合理尺寸;然后运用ABAQUS有限元软件建立非线性有限元模型,对节点各组件的尺寸进行优化,确定合理的组件尺寸。通过有限元分析和试验对该节点的性能进行研究。结果表明:该空间半刚性C型节点在弯矩荷载作用下表现出了较好的受弯承载能力和延性;节点刚度及承载力均随锥头侧连接板厚度、前端板厚度的增加而增大。节点锥头部分的材料本构模型选取对有限元分析结果的影响显著,采用三折线模型模拟所得结果更为精确。
A new space semi-rigid C-type node is proposed. In order to make the node have a good ability of rotation and energy dissipation, based on the basic principles of seismic resistance of strong nodes and weak components, a space semi-rigid node with strong connection and weak plate is proposed. Firstly, the reasonable size of each component of the node is initially determined according to the normative and theoretical analysis. Then the nonlinear finite element model is established by using ABAQUS finite element software to optimize the size of each component of the node and determine the reasonable component size. The performance of the node is studied by finite element analysis and experiment. The results show that the space semi-rigid C-joints show a good flexural capacity and ductility under bending moment load. The stiffness and the bearing capacity of the semi-rigid space joints increase with the increase of the thickness of the conical head side and the thickness of the front plate Big. The material constitutive model of the conical head node has a significant influence on the results of the finite element analysis. The simulation results using the tri-fold line model are more accurate.