ABSTRACT
In order to explore the mechanical properties of the key joints of the aluminum alloy runner in the open-frame mineral wool board ceiling, the monotonic tensile test of the main-cross runner joint and the main runner-hanger joint using aluminum alloy runner is designed and carried out. This study reveals two failure processes of the main-cross runner joint, and the failure process of “snap formation” will obtain a larger peak load than that of “no snaped”. The uncertainty of the formation of the clip caused by it is one of the reasons for the serious earthquake damage to the suspended ceiling; in addition, the influence of the geometric size on the joint force is analyzed. In the case of using double hangers in the test, the strength of the main runner-hanger joint will increase by 37.19%. On this basis, based on ABAQUS, the seismic response analysis of the substructure of the suspended ceiling considering the joint strength is carried out, and it is found that although the final damage state is similar, the damage scales of the suspended ceiling with the larger main and cross runners are all smaller. The above research conclusions can provide a reference for the seismic structure design, engineering practice, and corresponding specification atlas of the suspended ceiling system.
