RU2544193C1 - Three-pin arch of triangular contours - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: three-pin arch of triangular cross section includes semi arches from rectilinear elements, made of paired thin-walled elements of open sections and fixed at the ends by walls of sheet gusset plates. Sheet gusset plates are made along the length of alternating contours, at the ends they contain flanges and ribs, and provide for development of unloading eccentricities both in support units in area of ties fixation and also in the arch comb.

EFFECT: reduced metal intensity of a structure.

2 cl, 4 dwg

Description

The invention relates to the field of construction, and in particular to three-hinged arches of triangular shape, which can be used as load-bearing structures of lightweight coatings of buildings and structures.

Known three-hinged arch of a triangular shape, including half arches of rectilinear elements of a composite section, ridge overlays and support devices connected by a puff [A.S. No. 646020, IPC E04C 3/00. Bulletin No. 5 of 02/05/79].

A disadvantage of the known solution of a tri-hinged arch of triangular shape is the busyness of the composite section of the semi-arches, which leads to the great complexity of manufacturing.

Another tri-hinged arch of triangular shape is known, including straight-line half-arches of thin-walled channels connected to each other in the ridge, and support nodes connected by a tightening [RF Patent No. 2236522, IPC E04B 1/48. Bulletin No. 26 of September 20, 2004].

A disadvantage of the known solution is a significant bending moment in the middle of the semi-arches, which leads to an increased consumption of material on the semi-arches.

Closest to the invention in technical essence is a three-hinged arch of triangular section, including half arches of rectangular elements of a continuous section, connected in the ridge by overlays, support nodes that create unloading eccentricities, and tightening [book. Wood and plastic structures. Ed. G.G. Carlsen. M .: Stroyizdat. 1986, pp. 251-252].

The invention is aimed at reducing the material consumption of a three-hinged arch due to the possibility of increasing the values of unloading eccentricities.

The object of the invention is achieved by the fact that in a three-hinged arch of triangular shape, including half-arches of rectangular solid elements with fasteners at the ends, providing connection of the half-arches in the ridge and their fastening on the supports with the provision of connecting puffs with the creation of unloading eccentricities, according to the invention, the fastening elements are made in the form of sheet gussets of variable cross-sectional length and with flanges and ribs at the end, ensuring the connection of the semi-arches in the ridge also with Rouge eccentricities with respect to the center of gravity of their cross section which is formed by two thin-walled open section elements attached to the wall sheet luminaire. Fastening thin-walled elements of the semi-arches, as well as puffs, it is advisable to perform on bolts.

Figure 1 shows a General view of a three-hinged arch of a triangular outline; figure 2 and 3 shows a cross section, respectively, 1-1 and 2-2 in figure 1; figure 4 shows the semi-arch at the time of assembly.

The tri-hinged arch of triangular section includes half arches 1 of straight elements made of paired thin-walled elements of open section and attached at the ends by walls to sheet shapes 2. Sheet cuts 2 are made along the length of a variable shape, at the ends they contain flanges 3 and ribs 4 and provide the creation of unloading eccentricities as in the support nodes in the place of fastening puffs 5, as well as in the ridge of the arch. The connection of the arch elements is carried out on bolts 6.

Assembly of the proposed arch design is implemented in the following sequence. Produce rectilinear thin-walled elements 1 and a tightening 5, for example, with holes for bolts 6. Make sheet gussets 2 with flanges 3 and ribs 4 and coaxial holes for bolts 6. Elements 1, 2 and 5 are installed until the holes are aligned and fastened with bolts 6. When this, in the supporting and ridge nodes, unloading eccentricities “e” are organized with respect to the center of gravity of the section of rectilinear elements. The introduction of unloading eccentricities reduces the bending moment in the middle of the section of the half arches, while the moment at the ends of the rectilinear elements is perceived as a reinforced section, including paired thin-walled elements 1 and sheet gussets 2.

The proposed design of the three-hinged arch allows to reduce the consumption of steel up to 20% and to reduce the height of the cross section of thin-walled elements.

Claims (2)

1. A three-hinged arch of triangular shape, including half-arches of straight-section solid-section elements with fasteners at the ends, providing connection of the semi-arches in the ridge and their fastening on the supports, ensuring the attachment of puffs with the creation of unloading eccentricities, characterized in that the fasteners are made in the form of sheet gussets of variable length with flanges and ribs at the end, providing a connection of the semi-arches in the ridge with unloading eccentricity relative to the center of gravity and their section which is formed by two thin-walled open section elements attached to the wall sheet luminaire. 2. The tri-hinged arch of a triangular shape according to claim 1, characterized in that the thin-walled elements of the semi-arches and the tightening are attached to the sheet shapes on bolts.

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