Study on Mechanical Properties of Hollow Sandwich Concrete Filled Steel Tubular Column-Steel Beam Assembled Joint System

This paper studies the bearing capacity and seismic performance of a new type of assembled joint with tenon. The finite element model of hollow sandwich concrete-filled steel tubular column-steel beam assembled joint system is established by ABAQUS software, and its mechanical mechanism is analyzed. The static performance and hysteretic performance of bolted and tenon assembled joint system with different ring plate width, embedded depth, axial compression ratio and concrete strength are compared. Through the comprehensive comparative analysis of the stress nephogram, hysteretic behavior and skeleton curve of the members, the results show that the assembled joint system of hollow sandwich concrete filled steel tubular column and steel beam has reliable bearing capacity and good energy dissipation performance. The assembled joints based on tenons form fully assembled non-permanent beam-column joints, which makes the space layout more flexible and solves the problem of limited middle height in temporary buildings.