Abstract
In order to study the mechanical properties of joints with CFST columns and unequal height steel beams, based on the simplified mechanical model and reasonable material constitutive model, the finite element model of this kind of joints is established by using ABAQUS finite element software, and four joints are simulated and analyzed and the load-displacement hysteretic curves and skeleton curves of the specimens are obtained. The results show that the hysteretic curves of this kind of joints are relatively full, and it has strong energy consumption capacity. Comparing the simulated hysteretic and skeleton curves with the existing test results, the two are in good agreement, which verifies the rationality and feasibility of the finite element modelling. Finally, the seismic strengthening measures of this kind of joint are given, which lays the foundation for the subsequent research on the seismic performance of the frame with this kind of joint.
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