EXPERIMENTAL VERIFICATION OF THE METHOD OF CALCULATION LAP-JOINTS IN THIN-WALLED CONSTRUCTIONS

摘要

The paper presents the results of the experimental verification of the method of calculation of an m-bolt single-cut joint between two walls of cold-bent profiles, described in 2 and 3. The author of 2 compared the numerical results, obtained by using this method, with the results of experimental investigations of a symmetrical 5-blind-bolt joint of walls 5.0 mm thick, made with blind-bolts BOM-R16 1, The paper contains a diagram illustrating the behaviour of a symmetrical 8-blind-bolt joint, loaded alternately by the bending moment ±M, and the behaviour of a asymmetrical 4-blind-bolt joints, subjected simultaneously to bending and shearing. Also here the experimental results have been compared with the numerical results. It has been found out that in both investigated cases the rigidity was actually higher in the joints than calculated by means of the equations concerning this method. In both tested joints the loads were reiterated cyclically on stabilized levels. For the 4-blind-bolt joint the boundary curve of the load-carrying capacity was determined.