RU1813152C - Three-dimensional bar structure - Google Patents

Abstract

Usage: in load-bearing structures of coatings of buildings and structures. SUMMARY OF THE INVENTION: A spatial bar structure includes cells in the form of equilateral pyramids with square bases formed by rods of bent profiles of the same length. The vertices of adjacent pyramids are facing in opposite directions. The rods of the tops and corners of the bases of the adjacent pyramids are bolted to the trapezoidal duct. 1 s.p. f-ly, 3 ill.

Description

The invention relates to construction and can be used in load-bearing structures of coatings of buildings and structures.

The aim of the invention is to increase reliability.

Figure 1 shows a fragment of a spatial bar structure; in Fig. 2, node I: in Fig. 3, a trapezoidal box-shaped element with horizontal corners protruding from its base.

The spatial rod structure includes cells of equilateral rod pyramids 1 with square bases 2 formed by rods 3 from bent profiles (channels) of the same length. The vertices of adjacent pyramids 1 are facing in opposite directions. The rods 3 peaks and corners of the bases of the adjacent pyramids 1 are bolted 4 to the trapezoidal box element 5. Trapezoidal box

Element 5 may be solid or with corners protruding from its base to secure the pyramid base rods. In the second embodiment, the box-shaped element is made of one metal sheet by, for example, stamping. A stamp of a given configuration bends the sides to form a trapezoidal box-like element and leaves all four corners - the workpiece - in a horizontal position.

Installation of the structure is carried out as follows.

The rods 3 from bent profiles of the same length with holes at the ends for the bolts 4 are delivered to the place of installation of the structure, which is carried out in conductors that fix the design position of the rods 3 and box elements 5 and fasten them together with bolts.

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 The combination of the rods of the vertices and the corners of the bases of adjacent pyramids with a nodal element ensures the joint operation of individual pyramids.

The implementation of the nodal element in the form of a trapezoidal box element allows you to arrange the edges of the pyramids at equal angles (60 °) to each other, which means that it is possible to evenly absorb forces from external loads and equal rigidity, as well as fixing the rods with bolts that prevent occurrence in attachment points of undesirable additional bending moments due to the formation of a pivot joint, which increases the reliability of the structure. In addition, the bolts provide automatic alignment of the rods and the convenience of their connection in a small box.

The implementation of the rods from bent profiles allows the use of rods of design thickness and cross-section without unreasonable excessive consumption of metal.

When using this design, reliability is increased by 10-15%, labor costs during installation are reduced

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structure by reducing the number of bonds and the absence of the need for alignment, metal consumption is reduced, it is possible to apply anticorrosive coating in the factory to structural elements without additional coating after installation of the structure,

Claims (2)

1. A spatial rod structure, including cells in the form of equilateral rod pyramids, adjacent of which are turned by vertices in opposite directions and have common edges, and the pyramid rods are connected by nodal elements, characterized in that, in order to increase reliability, each nodal element is made in in the form of a trapezoidal box element, to the base and walls of which are attached the rods of the vertices and corners of the bases of the pyramids. 2. The construction according to claim 1, with the fact that, in order to reduce the consumption of materials, the rods are made of bent profiles. FIG. i 2 (Щ), у 9W.3