THREE-HINGED OPEN-ENDED FRAME Russian patent published in 2015 - IPC E04C3/42 

FIELD: construction.

SUBSTANCE: invention relates to civil engineering, in particular to a three-hinged open-ended frame used in seismically hazardous areas. The three-hinged open-ended frame consists of symmetrically located two open-ended crossbars, two stands and two struts integrated in the frame structure with the hinged interface of the open-ended crossbars in the ridge and stands with basements; the crossbars consist of external and internal belts connected among themselves by array elements; in the eaves zone an eaves gutter strut and an ascending strut of a double section are located; along the external outline the external belt of the open-ended crossbar and the stand are connected with the eaves gutter strut by means of nodal cross beams, fastened to embedded details, each consisting of a nodal bolt, a nodal plate and two sheet gaskets arranged in cuts of the stand and the external belt of the open-ended crossbar; along the internal outline the internal belt of the crossbar is connected to the strut, eaves gutter strut and to the ascending strut of the double section by means of a damper from rigid rubber and collars from strip steel on bolts.

EFFECT: improvement of the operational reliability of the frame at seismic loads.

6 dwg