BEARING STRUCTURE OF ELECTRIC POWER LINE Russian patent published in 2003 - IPC

FIELD: construction industry. SUBSTANCE: invention refers specifically to bearing structures in the form of space truss of high-voltage electric power line. Technical result of invention consists in reduced usage of steel for manufacture of chords and in optimization of forms of chords over height of truss in correspondence with loads acting on truss over its height to raise mechanical strength of space truss to take bending moments without any growth of thickness of metal sheet of chords and any expansion of truss base. Bearing structure of electric power line presents space truss of polygonal cross-section carrying at least three shaped chords arranged at some distance one from another and interconnected by means of members of grates with formation of closed cross- sectional circuit. Base of each shaped cord has faces made of continuous steel sheet bent in transversal plane over entire height of bearing structure with making of specified geometric form of central surface and of bent surfaces arranged at preset angle to it and forming stiffening ribs of chord of specified shape. Members of grates are made fast to extreme stiffening ribs of adjacent cords. Ends of members of grates of adjacent side faces of truss are attached to common units on its chords. Pentahedral base of each shaped chord forms five surfaces. First surface is central, two other side surfaces adjacent to central surface are arranged along its sides at right angle with reference to it, two extreme surfaces bordering on side surfaces are arranged at obtuse angle to side surfaces. Central surface of cord has shape of isosceles triangle or right- angled-triangle or trapezium. EFFECT: raised mechanical strength of truss. 5 cl, 13 dwg