利用ANSYS建立了空间中柱端板连接节点、边柱端板连接节点和角柱端板连接节点有限元模型,并分析了这三种空间端板连接节点在空间荷载和平面荷载作用下初始转动刚度和弯矩等性能的变化。研究表明:在空间荷载作用下,空间节点的初始转动刚度要普遍大于平面荷载作用下的初始转动刚度,尤其是空间中柱节点初始转动刚度变化最大;对于节点承载力,空间荷载作用下的承载力小于平面荷载作用下的节点承载力,空间角柱节点受荷载影响最大。最后基于有限元分析了不同荷载作用下空间节点性能差异的原因。 ANSYS was used to establish the finite element model of the connection points of the mid-column, mid-column and mid-column in the space. The initial rotational stiffness of these three kinds of space-end connections under space and plane loads And bending moment and other performance changes. The results show that under the action of space load, the initial rotation stiffness of space nodes is generally larger than the initial rotation stiffness under plane loads, especially the change of initial rotation stiffness of space nodes. For the bearing capacity of nodes and the bearing capacity under space load The force is less than the bearing capacity under plane load, and the space angle node is the most affected by the load. Finally, based on the finite element analysis of the different load under the effect of space node performance differences.