Rocking interconnection for moment resisting modular buildings: Experimental and numerical investigation

The speed of assembly and structural reliability of prefabricated prefinished volumetric constructions (PPVCs) are closely dependant on the interconnections linking modules. Among these interconnections, those with frictional mechanisms can offer greater efficiency in modular construction. This paper investigates the structural performance of a novel frictional interconnection through experimental and numerical studies. Initially, A joint composed of innovative interconnection and common intra-connection (beam-to-column connection) was prefabricated and tested under cyclic loading. The numerical models of the experimental sample are developed using ABAQUS software, subsequently validated against experimental results. Then, the impact of different support conditions (pin or roller) on joint behaviour is investigated. The outcomes indicates that the joint can effectively be used in moment-resisting frames in PPVCs as a result of its adequate stiffness, being classified as a rigid connection based on AISC 316–22. The interconnection reaches its maximum load capacity through rod yielding, while the other components remained intact. Numerical simulations reveal that no sliding occurs between the endplates during the test, indicating the adequacy of axial loads. Furthermore, changing the support conditions can affect the response of the joint, governed by the beam's and the interconnection's moment capacity. • Cyclic behaviours of the rocking steel interconnection are studied. • A joint involves floor beam-to-column and RSI is tested. • A finite element model is generated and verified from the test sample. • The numerical models are developed to find out the effects of supports on behaviour of RSI. • Finite element models with various beam sizes are derived to realise the interactions.