论文部分内容阅读
盖板加强式梁柱刚性连接节点是使塑性铰外移以提高节点塑性变形的一种改进形式。为了研究梁柱盖板连接的滞回性能,在考虑材料、几何和接触状态非线性基础上,采用三维实体单元对梁柱盖板连接进行了循环加载有限元模拟。设计了4组共12个试件,研究了节点域厚度、梁高、盖板长度及轴压比等参数对盖板连接滞回性能的影响。有限元分析结果表明:大部分节点表现出良好的延性,梁端位移超过80mm;节点域厚度越厚,连接的承载力和刚度越高;梁高越大,连接的延性越差,可能会发生强梁弱柱破坏;盖板长度对节点性能没有显著影响;轴压比越大,节点的强度、刚度和延性会显著降低。
Reinforced beam-column stiffened connection is an improved form that makes the plastic hinge move to increase the plastic deformation of the joint. In order to study the hysteretic behavior of the beam-column connection, a three-dimensional solid element was used to simulate the connection of the beam-column cover with cyclic loading based on the nonlinearity of material, geometry and contact state. Four groups of 12 specimens were designed. The effects of joint thickness, beam height, cover length and axial compression ratio on the hysteretic behavior of the cover plate were studied. The results of finite element analysis show that most of the joints show good ductility and the displacements of beams exceed 80 mm. The thicker the joint area is, the higher the bearing capacity and stiffness of the joint are. The higher the beam height is, the poorer the ductility of the connection is, the stronger weakness may occur The length of the cover has no significant effect on the joint performance. The larger the axial compression ratio, the lower the strength, stiffness and ductility of the joint will be.