SU996660A1 - Joint of spatial framework rods - Google Patents

Description

(5.4) NODE CONNECTION OF SPATIAL FRAME STARS

 The invention relates to the construction and can be used in spatial core structures of buildings and structures, in particular in structural structures, assembled from pyramids of standard or chess arrangement.

The well-known nodal connection of the Space Deck system includes. the node with four threaded sockets into which the ends of the tubular belt rods are screwed, and the remaining rods are braces connected to the node rigidly With 1.

The disadvantages of this solution lie in the complexity of the construction of the top of the pyramid with lateral rods with a limited bearing capacity of the joint, as well as in the waste of the material due to the need to compensate for the weakening of sections in the cut parts of the rods.

The closest to the invention to the technical essence is the node. Into the stars, the connection of the Unibat system. Nodal connections of this type are used in lattice spatial structures assembled from pyramids.

to ensure the co-operation of pyramids with return rods. At the top of the pyramid there is a knotted element in the form of a plastic box with a hole in the end. To the sides of the element abut figured cut ends of tubular bracings.

These rods are made either continuous from channels or

10 of the pipe, joined in a knot on the sheet gussets. Poiskovye channels of one direction are arranged with shelves upwards, covering the node element on both sides, a. in another direction, shelves down. Rods walls and knotted element butt tightly touch each other and are interconnected by a bolt. In the case of tubular sections of the gusset. 20 rods of different directions are placed one upon the other at different levels. n x 2.

The disadvantages of this solution are: the concentration of rods in the node,

Claims (2)

25 which leads to the appearance of additional bending moments} significant metal consumption for the node, due to the large calculated wall thickness of the element, which work on bending as plates supported on three sides, from the load transmitted by the ends of the braces; the complexity of figure cutting of the ends of tubular braces with the need for high precision, which cannot but reflect on the laboriousness of manufacturing the joint. The purpose of the invention is to reduce metal consumption and labor intensity. This goal is achieved by the fact that in the node connection of the rods of the spatial skeleton, including the node in the form of a hollow and closed cube from above, walls are rigidly attached to the cube with wall bolts and braces, the suspension rods are provided from the inside with end sleeves with internal the carving and the side walls of the cube are made with from, revolutions, and tightening bolts are inserted from the inside of the cube through each hole into each sleeve of the corresponding wedge rod, while the ends of the diagonal braces are made flat and rigidly attached to The unlocked KpoMKsiM cube is parallel to its base. FIG. Figure 1 shows the node connection of rods with a normal arrangement of braces with respect to the base of the node, an option in the pl. Hej in FIG. 2-section A-A in FIG. one; in fig. 3 is the same as in FIG. 1 with a diagonal arrangement of braces with respect to the base of the node element (another option); in fig. 4 shows a section BB in FIG. 3. The lateral rods 1, located in two mutually perpendicular directions, adjoin the knotted ele- ment 2, which has the shape of a polystyrene box. The flat ends of the braces 3 are rigidly attached to the side wall of the node element along its contour from the covered base. The long rods are fitted at the ends with bushings - liners 4 with threaded holes, into which the bolts 5 are screwed, connecting the node with the rods. With a normal arrangement of braces with respect to the base of the node, which corresponds to the staggered placement of pyramids in the spatial structure, the ends of the braces are rigidly attached along the entire side of the lateral sides of the node. This makes it possible to transfer the force from the diagonal to the two walls of the element parallel to the direction of the diagonal. The wall itself, to which the brace is attached, perceived the force from the transverse rod, bends like a plate, is supported around the contour, which allows the knot to make the tone J outsled. With the diagonal arrangement of the braces relative to the base of the knot at the flat end of the brace corner cutout. Then, the force from the bracing is transmitted to the adjacent side walls of the node element, reinforcing them and forcing them to work from the forces in the transverse rods according to the plate pattern supported by the rto contour. The node connection works as follows. The compressive force from the transverse rod is transmitted to the node by mechanical contact between the rod liner and the wall of the node and is perceived by the side wall of the node working on a bend as a plate, supported along the contour. The tensile force from the rod is transmitted to the bolt and is perceived by the plate, working as in the previous case. . The proposed solution received approbation during the construction of structural structures of mezzanines, the carrying part of which is made in the form of a structural slab assembled from pyramids of pentahedra arranged in a checkerboard pattern. The economic effect of the introduction amounted to 1.8 thousand rubles. or 3 rub. on 1 m mezzanine. The metal consumption due to the application of the invention is reduced by 7%, and the labor intensity is reduced by 15%. Claims of the invention: “Nodal connection of spatial frame rods, including a nodal element in the form of a hollow, open cube from above”, suspension rods rigidly attached to the cube with end bolts, and bracing, characterized in that, in order to reduce metal consumption and labor intensity, the readable rods are provided internally at the ends with sleeves with internal thread, and the side walls of the cube are made with openings, the clamping bolts being inserted from the inside of the cube through each hole into each sleeve of the corresponding bypass rod, with that the ends of the braces are flat and are rigidly attached to a non-closed edges of the cube parallel to the ground. Sources of information taken into account in the examination 1. V. Trofimov. and other structural structures. M., stroiizdat, 1972, p. 19-20. . 2. Lubo L.N. and others. Plates of regular spatial structure. L., Stroyizdat, 1976, p. 27 (prototype) -P LL FIG. g