Investigation of the mechanical properties of inserting-type support frames

In this paper, a widely used disc-buckle support frame is taken as the object, and parallel positive and negative bending tests are carried out on the connection nodes of the disc-buckle support frame. The failure mode, stress distribution law and bending resistance of the connection nodes of the disc-buckle support frame are systematically studied, and the connection characteristics of the connection nodes of the disc-buckle support frame are verified to be semirigid connections. On the basis of the test results, a finite element model of the connection joint of the disc buckle frame is established, and the calculation results are in good agreement with the test results. Based on the established finite element model, parametric analysis was carried out on the influencing factors, such as the depth of the pin inserted into the connecting disc, the thickness of the connecting disc. The insertion depth of the pin cannot exceed 29 mm, and the bearing capacity of the joint will be reduced when the insertion depth exceeds 29 mm. The bearing capacity of the joint increases with the increase of the thickness of the connecting disc.