Study on Mechanical Performance of Column Base Joint with Slip-Friction Arc Endplates

In order to study the mechanical performance of column base joint with slip-friction arc endplates, the finite element simulation analysis of this joint is carried out. By changing the radius of arc endplate, axial compression ratio, and other parameters, the effect of different parameters on the bending capacity, joint stiffness, and bolt group force distribution of the joint is analyzed. The results show that the slip behavior of the column base joint is the best when the arc endplate radius is 0.7H (H is the height of the column section); This column base joint is semi-rigid and has good rotation capability. Based on the force distribution of the bolt group in the finite element analysis, the neutral axis of the bolt group is assumed to be located at the outermost row of bolts. Through theoretical analysis, the calculation formula for the sliding threshold of this joint is obtained. Compared with the simulated value, the two are in good agreement by using a correction coefficient of 0.75.