STUDY OF THE CONTACT JOINT OF COLUMNS IN STEEL FRAMES OF MULTI-STOREY BUILDINGS.

A brief description of prefabricated buildings from lightweight metal structures (LMS) is provided. A steel frame with a typical cell of the accepted size (6,0x6,0x3,0 m) is considered. The accepted cross sections of columns and beams are described, which taken from these articles by other authors. An overview of the tests of cross-section columns with a joint without fixing elements, researched in 1949 by the Central Research Institute of Industrial Structures, is given. The bending moments arising in the extreme column of the frame from the action of wind load, beam fastening, the occurrence of a fictitious transverse force, and the presence of random eccentricities are studied. It is confirmed that the contact joint of the columns can be located both at the floor level and in the middle of the column. The quick-assembly contact joint of columns is considered. A theoretical study of a joint in Femap with NX Nastran, which is subject to the maximum permissible load, is described. The diagrams of the test facility in the laboratory are shown, and the procedure for conducting tests is given. Assumptions are given about possible deviations of the actual experimental results from the theoretical ones due to manufacturing and installation inaccuracies. A comparison of the simulation results of the installation in the calculation complex and the experimental data obtained will allow us to assert whether it is possible to use the contact joint of square columns in steel frames of multi-storey buildings. It is important to establish whether a column consisting of parts stacked on top of each other is capable of working as an entire rod.