| 摘要 |
FIELD: construction. ^ SUBSTANCE: frame comprises extreme and middle columns, rigidly resting against a foundation, slab crossbars, a cover truss and units of crossbars and truss connection with columns. The lower belt of the truss is connected with high-strength ropes with units of braces connection arranged in the middles of spans. In the span connection of the lower truss belt and ropes is made in two units. Each of units is arranged at the distance of 0.3-0.4 of the span length from the nearest column. Extreme and middle columns are equipped with support units of crossbars comprising safety devices that include struts, supports, sliders, suspensions and horizontal squabs. Devices of support units of crossbars at middle columns are additionally equipped with safety plates, springs, separating angle profiles, crossbar stiffening ribs and rotating supports. ^ EFFECT: reliability of a frame and prevention of building progressive collapse. ^ 19 dwg |
