SU69128A1 - Double Circular Mesh Design - Google Patents

Description

Circular-mesh structures are known in construction practice, for example, arches assembled from standard elements interconnected so that the ends of the elements of one direction are joined to the midpoints of elements of another direction. The disadvantage of such structures is their low rigidity and the limitation of their span.

In order to overlap large flybins, double circular mesh constructions were proposed, in which the elements of each mesh are connected by the above method. At the same time, parallel elements of one and the other grids were connected by rods forming the internal grid of the double grid. The elements were connected in advance — prior to the installation of the grid construction, i.e., pre-assembled elements were assembled in the form of trusses with parallel elements of the two grids themselves. The disadvantage of this kind of double construction is the relatively large weight of the individual finished element, which makes installation difficult, as well as the large number of rods connecting

by sa. In addition, in this case, elements of the same direction in both grids are in the same section (in one node). In this case, the accuracy of the fabrication of elements and the installation of the grid should be increased, since deviations cause considerable differences during installation.

The proposed design aims to eliminate the noted disadvantages of double ball-net arches and consists in the fact that the connection of parallel elements of both grids is made only by diagonals running from the joints of the elements of one grid to the joints of the other grid. In this way, a double mesh of intersecting simple grids is obtained.

The assembly of the proposed design is made of simple elements, such as planks or bars, in the same order as ordinary structures.

In this case, the joints of the elements of the same direction of both grids are located in a razbezhku.

The figures show, by way of example, the construction of such a wooden circular-mesh vault. FIG. 1 shows a section and in FIG. 2 -

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the plan of the arch; in fig. 3 4 - elements of the upper and lower grids in two projections; in fig. 5 bracing in two projections; in fig. b - node of the grid element connection; in fig. 7 - bracing connection with the top element of the grid.

The vault shown in the drawing has a rectangular mesh with metal-free connections at the nodes. Elements of the upper grid, in one direction, are joined at the midpoints of the elements / of another direction and vice versa. In the same way, the elements 2 of the lower grid are joined in the middle of the elements 2.

The upper and lower joints of parallel elements are located in a scramble. To these junctions in the plane of the elements Jf and 2, two braces 3 each come together. In the plane of the elements Y and 2 there are respectively bracing 3, which are arranged in the same way as bracing 3. In some areas, for example, near the fifth arch, additional bracing 4.

The elements of the upper and lower grids are made of boards and have a simple outline (Fig. 3 and 4). The connection is made with the help of end plugs included in the middle holes of the intersecting elements (Fig. 6). The JPacKOCbf connecting upper and lower grids have end grooves with holes for bolts or dowels. With these grooves, they are worn when the roof is mounted on the upper or lower element and fixed on it with a bolt or a pre-crimped wooden dowel rod (Fig. 7).

Above and below, the vault has a double cross boarding 5 on the nail x.

The sheathing can be included in the calculation along with the mesh design. However, it can be seen as the main supporting structure of the vault; in this case, the grid will play the role of links between the floorings. In the absence of the need for it obshchivka may be absent in the net vault.

The vaults of the described construction can be designed for floors with a span of 100 m or more.

The assembly of double red-mesh arches differs little from the production of assembly of ordinary arches. First of all, it is necessary to erect longitudinal supports for the vault and gable arches, as well as to make a series of intermediate longitudinal supports in the span, which will serve as temporary supports for mounting the arch and directing them for its arc. The assembly of the lower arch of the vault and the laying of the lower binder can be carried out with a carriage moving horizontally with a working platform moving in a vertical direction. The grid of the lower vault with the boardwalk will be the platform for the assembly of the remaining constructive ones; : items.

Constructions of the type described can be used not only in the arches, but also in other types of construction.

The elements of the arch can be made not only from wood, but also from other materials.

Subject invention

Claims (2)

1. A double circularly reticulated structure (e.g. a roof) in which the ends of the elements of one direction are connected to the middle parts of the elements of another direction and the parallel elements of one and the other grids are connected by rods forming an internal grid, characterized in that the connection of parallel grid elements carried by braces running from the joints of Ele. cops of one grid to the joints of another grid. 2. Circular net construction according to claim 2, characterized in that the elements of one or both grids are composed entirely of a common one or several intersecting layers of boards. No. 69128 - 3 - FIG. FIG. 3 d FIG. five ATG  / FIG. 7 one-. FIG. four . g FIG. 6 R C-