Experimental Study on the Bending Resistance of the Connection Nodes of Heavy Duty Socket and Plate Buckle Steel Pipe Scaffolding

Nowadays， due to the extensive construction of long-span buildings， the requirements for the stability of scaffolding are becoming higher and higher. Previous studies have found that the connection nodes of spigot and disk-buckle steel pipe scaffolding play a crucial role in the stability of scaffolding. In this regard， this paper first conducts finite element modeling and analysis of the connection nodes of heavy socket disk-buckle steel pipe scaffold based on the semi-rigid theory， compares the bending moment-angle curve obtained with the existing bending experiments of heavy socket disk-buckle steel pipe scaffold， verifies the reliability of the finite element analysis， establishes a refined numerical model， and analyzes the thickness of the connecting disc that affects the bending performance of the node. Four parameters， namely， the material structure of the latch， the thickness of the latch， and the insertion depth， are analyzed， and a conclusion is drawn， which lays a foundation for the subsequent research on the random defects of the joints and the establishment of the simplified model of the scaffold.