Mechanical properties of assembled replaceable L-type steel RCS joints by way of numerical method Available to Purchase

This paper proposes a novel type of assembled replaceable stiffener L-type steel reinforced concrete column-steel beam composite joint. The proposed structure is characterised by its usability and uniqueness, making it suitable for beam-column joints in large shopping malls, mid- and high-rise office buildings, factories, garages, and other types of building structures. Finite element software modelling and numerical simulation methods are utilised to study the mechanical properties, deformation, and failure behaviour of the replaceable stiffener L-type steel within the new joint, focusing on the effects of variations in the stiffener form and thickness. The results indicate that the effective stress area significantly impacts the stiffness of the stiffener, as a larger effective stress area leads to increased stiffness, higher bearing capacity, and improved ductility. Among the studied stiffeners, stiffener JG-3 exhibits a high energy dissipation coefficient, demonstrating strong energy dissipation capacity. Furthermore, as the thickness of the stiffener increases, the overall stiffness of the joint improves, along with enhanced bearing capacity and initial stiffness. This increase in stiffness leads to more pronounced degradation in strength and stiffness, and the ductility coefficient and energy dissipation coefficient increase.