ABAQUS-based hysteresis performance analysis of thorough-diaphragm bolted connection between concrete-filled steel tubular column and steel beam

Abstract

Concrete-filled steel tube can effectively improve the compressive strength of members, so it is widely used in high-rise buildings, bridges and tunnels. However, there are only limited studies on the hysteresis performance of through-diaphragm plates in steel pipe concrete. In light of the current situation, this paper establishes a model of thorough-diaphragm-diaphragm bolted connection TDBC structure using numerical simulation software ABAQUS, conducting monotonic loading and cyclic displacement loading on it to study the hysteretic performance of this structure. The results reveal that the semi-rigid connection of TDBC contributes to the outwards displacement of the plastic hinge in the beam-column joint, indicating a hysteretic good performance. Furthermore, this study also finds that the flange and web area of steel beams present obvious ductile damage characteristics, which is in line with the design philosophy of strong joints and weak members, reproducing the actual damaging process to a certain extent.