Nodal connection of spatial frame rods

FIELD: construction.

SUBSTANCE: nodal connection includes connection angles rigidly fixed to vertical walls of rods with end plugs and shelves joined on bolts. Same connection angles with shelves joined by bolts are rigidly fixed on horizontal walls (shelves) of rods. At the same time vertical and horizontal walls of connected rod elements in the range of their attachment to leaves of connection angles are reinforced from inside with membranes arranged in parallel to end plugs.

EFFECT: increased bearing capacity of nodal connection.

3 dwg


The proposed technical solution relates to the field of construction and can be used in the nodal connections of the truss elements of the spatial framework of buildings and structures.

Known nodal connection two lap spatial design with trim corners of the ends of the rod elements of the zones in which one of the shelves each corner of fasolki performed by broadening for fastening with the core elements of the lattice [Orlik VM host connection of spatial beam structures. - Copyright certificate №648703, 25.02.1979, bull. No. 7]. Design collect on the bolts without welding.

The disadvantage of this nodal connections is the need for double cutting tubular elements, which increases the complexity of manufacturing. In addition, the bolted joints of corner gussets require compliance with high precision as in the manufacture and installation of structures.

Known to the node connecting rods spatial structure in which the core elements are connected to each other by bolts with angular tips and overlays, with angular lugs attached to the ends of the diagonal elements of the lattice, and pads to the ends of the horizontal belt elements [Gwatkin US the Node connecting rods spatial structure. - Patent No. 2087634, 20.08.1997, bull. No. 23].

what dostatkom node connection is that the rod elements connected in it, not structurally similar. Some of them have flanges, the other corner pads, which increases mnogodelnosti and complexity nodal connections.

The closest technical solution to offer (prototype) is a hub connecting the cross-beam structures, which is rigidly attached to the waist rods connecting parts connected between the shelves by means of bolts and placed in the angles formed by the side edges (vertical walls) core elements of the belts of a rectangular (or square) of tubular profiles. In this case coupling parts attached to their feathers to the vertical walls (lateral faces) so that coupled by bolts shelves are oriented to the center of the nodal connections [Avanesov SR, Marutyan A.S., Sargsyan O.V. Hub connection cross-beam structures. Copyright certificate №1428824, 07.10.1988, bull. No. 37].

The disadvantage of the described solution is a planar arrangement of the core elements of the zone that does not allow it to be applied at the nodal connection of the spatial framework. For their spatial location of the oblique cut in the pen areas and connecting areas, which complicates the hub connection. In addition, the carrying capacity of such slovosochetaniya in the spatial frame with heavy loads, includes crane and seismic effects, limited concistently gotowanych rectangular (or square) profile rod belt elements, which can cause pushing (pulling out) of the wall section of the lap element in contact with the connecting area.

The technical result of the proposed solution is to expand the applications node of the connection rod elements of a rectangular (or square) of tubular profiles, and increased load capacity, it can be used in spatial frameworks, including dynamic loads significant intensity.

The technical result is achieved due to the fact that the node connection rods spatial frame including rigidly attached to the vertical walls of the rods connecting the corners of the end caps and stacked on the bolts shelves, such as connecting the corners with stacked bolted shelves fixed to the horizontal walls (shelves) rods. The vertical and horizontal walls connected rod elements in the alignment of their attachment to the feathers of the connecting corners are reinforced from the inside diaphragms arranged parallel to the end caps.

The proposed nodal connection is on the fairly universal technical solution. It can be used, for example, in the absence of dynamic loads of considerable intensity, including crane and seismic effects, when the carrying capacity is quite achievable without diaphragms, which positively affects both the complexity of supporting structures and consumption of construction material. When the rods of one of the directions at the nodal connections it is advisable to produce one piece (uncut), thereby reducing the duration of the installation of the spatial framework.

The proposed solution is illustrated graphic materials, in which figure 1 shows a hub connecting rods spatial frame of tubular profiles with square (rectangular) cross-section exploded views, axonometric view; figure 2 - hub connection with one piece (uncut) the core element of one of the directions disassembled, axonometric view; figure 3 is a fragment of the spatial framework in General.

Hub connection terminals 1 a spatial frame of tubular profiles with square (rectangular) cross-section contains rigidly attached to the vertical and horizontal walls by means of welds connecting the corners of the 2 shelves which are connected by bolts 3, placed in the axial hole 4. (In the image on the visible portion of the hub to connect the texts bolts 3 conventionally not shown.) Wall connected to the terminals 1 and the connecting parts 2 from their feathers, more close to the center of nodal connections, reinforced end caps 5. From feathers, more remote from the center hub connection, the connecting parts 2, as well as the walls of the rods 1, reinforced diaphragms 6, arranged in the cavity of each of the tubular elements parallel to the stub 5.

Amplifying element of the proposed nodal connections made in the form of paired, parallel, sheet parts (plugs 5 and the diaphragm 6). This constructive design it differs from similar reinforcement element in the form of a single orifice of known solutions bespozvonochnoe node tubular farm [Levitansky IV attachment of the braces to the tubular belt bespozvonochnoj farm. - Copyright certificate №540019, 25.12.1976, bull. No. 47). It is obvious that the installation and welding end plugs 5 must be preceded by the same technological operations with the apertures 6.

If the intensity of the loads on the spatial frame is such that the load-carrying capacity of joints of his rods may be provided without apertures 6, the rod elements 7 one of the areas it is advisable to produce one piece (uncut) connecting the nodes.

The connecting parts and the amplifying elements of the proposed nodal connections of the rods about transtorno frame in assembled form are the basis of formation of nodes with futami, representing nodal reinforcing members geometrically invariant (triangular) shape, able to perceive and transmit significant efforts, including bending and torsional moments.

Hub connection rods spatial frame including rigidly attached to the vertical walls of the rods connecting the corners of the end caps and stacked on the bolts shelves, characterized in that the connecting parts with stacked bolted shelves fixed to the horizontal walls (shelves) rods, and vertical and horizontal walls connected rod elements in the alignment of their attachment to the feathers of the connecting corners are reinforced from the inside diaphragms arranged parallel to the end caps.


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