RESULTS OF EXPERIMENTAL RESEARCH OF THE WORK OF COMPRESSED RODS WITH GENERAL DEFORMATIONS, STRENGTHENED WITH WELDING

The article presents experimentally obtained information about the features of the work of compressed models that simulate the rods of steel trusses of the coating. 9 rods of T-section, made up of paired angles, were tested. The rods were divided into 3 series: 1, 2 and 3. Series 1 - straight (reference); series 2 - curves with a common bend on the edge in the plane of connecting gaskets; series 3 - curves similar to rods of series 2, but amplifi ed under load by increasing the cross section. Elements of reinforcement - rods from the corners, similar to the caliber of corners of the main rods, deformed in order to obtain a reverse bend. The purpose of amplifi cation is to bring the reinforced rod to a state close to central compression. The att achment of the reinforcement corners was carried out by hand welding by welding over welds of minimum dimensions in 4 sections. The load during amplifi cation was close to critical for rods of series 2. The rods of all series were loaded until loss of stability.