Numerical Analysis of Semi-Rigid Beam-Column Connections in Steel Structures

In order to discuss the accuracy of the shape factor of the three-parameter power function moment-rotation curves of semi-rigid steel beam-column joints, the finite element software ANSYS was used to simulate and analyze. The finite element solid model and the three-parameter power function model based on the component method were established respectively for the typical semi-rigid joints of the extended end plate, which were verified with the test results. Based on the Weber distribution, the practical calculation formula of the shape factor of the semi-rigid connection of the extended end plate was fitted through the finite element solid model and the three-parameter power function model based on the component method. The results showed that the formula for calculating the shape factor of semi-rigid connections with extended end plates based on Weber distribution was more accurate than the existing formula; by giving COMBIN39 element a simplified finite element model of bending moment-rotation curves obtained from the three parameter power function based on the comporent method, the design could not only accurately simulate the mechanical properties of the joint, but also could be simpler than the finite element solid model, which is convenient for application in practical projects, and provided a reliable reference and basis for the design of nonlinear semi-rigid joints of steel structure beams and columns.