现场无焊接装配式双梁双柱节点框架力学性能研究

In order to study the reliability of the joints formed by node plates and high-strength bolts in the modular assembly house and the calculation method of the double-beam double-column steel frame structure formed by the connection of this new angle joints, the mechanical properties of the angle members and joints under anti-symmetric load and symmetric load were analyzed and studied. Based on the theoretical analysis of the two-story steel frame connected by the joints, the simplification assumptions of joints are given. The calculation methods of the bending stiffness of double beams under anti-symmetric load and symmetric load at the joints were given and verified through the finite element simulation. The results of FE simulation and theoretical calculation show that the double beam without shear connector is a laminated beam under the action of anti-symmetrical bending moment, while the double beam with shear connector is a composite beam under the action of symmetrical bending moment. The theoretical calculated values of the normal stress of each section of the two-story steel frame connected by the L-shaped or T-shaped joints agree well with the average value obtained by the finite element simulation. Therefore, the new joints formed by node plates and high-strength bolt is reliable, which can be simplified as a rigid node. The double-beam double-column steel frame structure system connected by the joints can be calculated by the simplified calculation method given in this article.