WORK POWER OF THE SUPPORT UNIT OF THE STEEL I-BEAM

Abstract

Statement of the problem. In order to calculate the strength of the supporting beam, it is important to accurately determine the stress-strain state in the support node. There is a need to consider the possibility of transferring part of the bending moment from the middle of the span to the support node. A reduction in the bending moment in the span will allow the indicators of material consumption to be increased. Results. In the SCAD Office software models of volumetric finite elements of two working beams with a span of 9 m each were calculated. The stress-strain of the elements of the support nodes was determined, the bending moment from partial pinching was calculated. A decrease in the value of the bending moment in the middle of the span was observed. The efforts in bolted connections are obtained. Recommendations on the structural reinforcement of the support node are presented. Conclusions. The results of numerical calculations indicate a partial pinching of the beams in the support node, which leads to the appearance of a concentration of tensile stresses on the supporting sections of the beam wall and reduces stresses in the middle of the span. There is a possibility of reducing the cross section of the beam. Significant tensile forces in the bolts of the extreme upper row were revealed. There is a need for structural reinforcement of the support node.