СОВМЕСТНОЕ ДЕФОРМИРОВАНИЕ ЖЕЛЕЗОБЕТОННОГО РИГЕЛЯ С КОЛОННАМИ В ПОКРЫТИИ ОДНОЭТАЖНОГО ПРОМЫШЛЕННОГО ЗДАНИЯ

Abstract

The crossbar of the transverse frame of a one–story industrial building is a truss structure that overlaps the span, in a typical solution it rests on columns pivotally. In the middle of the span there are large bending moments proportional to the square of the span, increasing the height of the crossbar and the building as a whole. The paper proposes a rigid connection of the truss structure with the crane part of the column, causing a redistribution of efforts. In the example, this made it possible to reduce the cross-section height of the crossbar from 1.4 m to 0.8 m and the weight from 28.8 t to 20.16 t. At the same time, in the middle of the span, the bending moments decreased from 2.35 MNm to 0.76, and the maximum moments equal to 1.29 MNm act on small sections near the supports. The cross section of the crane parts of the columns increased slightly, but in general the solution turned out to be more economical and the height of the coating and the building as a whole decreased by 0.6 m. The deflection in the middle of the span from the load of 0.0209 MN/m was 0.0994 m with a maximum permissible value of 0.109 m.