Study on mechanical properties of bolted assembled RCS composite joints

Herein, a new type of bolted assembled reinforced concrete column-steel beam (RCS) composite joint is proposed by analyzing the force and force transmission process of RCS beam composite joints. The practicality and uniqueness of the structure apply to beam-column joints in large shopping malls, mid- to high-rise office buildings, factories, garages, and other building structures. By the finite element software modeling, a numerical simulation is established and used to analyze the variation of stress and equivalent plastic deformation, hysteresis curve, skeleton curve, stiffness degradation, and energy dissipation coefficient under monotonic displacement-load and cyclic displacement-load. Results elaborate that the RCS composite connection has good ductility under monotonic displacement-load. Besides, under the cyclic displacement-load capacity, the hysteresis curve is full, the stiffness degradation is not obvious, and the ductility and energy dissipation are good. The research is expected to promote the engineering application and guide follow-up research of the new nodes.