STUDY OF MECHANICAL PROPERTIES OF A NOVEL COLUMN-BEAM-COLUMN PREFABRICATED STEEL FRAME JOINT

Currently, most research on prefabricated steel frame joints focuses on column-column or beam-column connections. However, there has been a lack of effective research on prefabricated column-beam-column joints with higher construction efficiency. In this paper, we present the construction and installation process and technical characteristics of a novel prefabricated column-beam-column joint (NPJ). Initially, we describe the technical specifications of the NPJ. Following this, we examine the mechanical performance of the NPJ using a validated finite element model and conduct a detailed analysis of various parameters affecting its performance. Subsequently, we propose a simplified method for calculating the performance of the NPJ, adhering to existing design codes. Our findings indicate that the NPJ exhibits robust mechanical properties, closely matching those of traditionally welded joints. Notably, the height of the beam emerges as a critical factor influencing the NPJ's load-bearing capacity, more so than the thickness of the lug. This research offers valuable insights and technical guidance for further exploration and practical application of prefabricated steel frame joints.