Investigating the Mechanical Properties of the Whole Structure and Structural Joints of the Integrated Modular House by Folding Pack

The integrated modular house by folding pack incorporates key components, primarily focused on joints, particularly occlusion and insertion joints between plates with expansion functionality. These joints are considered structural discontinuities. This study aims to develop a finite element checking method that accurately reflects the actual contact state of key joints in an integrated modular house by folding pack. The investigation delves into the mechanical properties of such houses, establishing a finite element model for the house joints based on elastic‐plastic contact theory. The analysis provides insights into stress and displacement distributions within the house. Simultaneously, a full‐scale experimental test is conducted on the structural occlusion joint between the roof and end plate, which fails at a load of 4.632 kN, with results compared to numerical findings. The study validates the safety and reliability of the structural occlusion joint. Both experimental and numerical results show that the stress and displacement of the structure under various load combinations meet safety and reliability requirements. The finite element analysis of the joint between the roof and end wallboard closely aligns with experimental results. The observed joint strength at failure significantly exceeds the design load, with the joint enduring up to 4.632 kN before failing, affirming its safety and reliability. Moreover, the structural occlusion joint exhibits no evident plastic deformation after 30 cycles, satisfying the requirement for continuous fault‐free cycles.