RU166297U1 - THREE-HINGED COMBINED WOODEN FRAME - Google Patents

Abstract

Three-hinged prefabricated wooden frame, including two L-shaped half-frames, consisting of crossbars and racks in the form of rectilinear blocks with variable cross-sectional heights and jointed pivotally to each other in the ridge assembly, as well as articulated adjacent to the foundations, characterized in that the cornice assemblies Г- The shaped semi-frames are made in the form of metal inserts, the flanges of which are combined with the wood of the crossbars and racks with glued pins equipped with locking nuts.

Description

The utility model relates to building structures, namely, to the supporting structures of three-hinged frames of glued wood, and can be used in the frames of buildings and structures for industrial and civil purposes.

Known prefabricated three-hinged frame made of glued wood, including two L-shaped half-frames, consisting of rectilinear crossbars and racks, articulated in the ridge assembly and articulated on the foundations, while the crossbars and racks of the semi-frames are rigidly combined in the cornice nodes with wooden overlays in the compressed areas and paired tension metal shoes of an angular type, attached to crossbars and racks in the stretched zones of joints and connected by tightening bolts (Grin I.M. va and synthetic materials. Design and calculation. - Kiev: Publishing house "Vishcha school", 1975, p. 190, Fig. 67, b).

A disadvantage of the known technical solution is the increased material consumption, which is due to the location of the joints of the racks with the crossbars in the zone of maximum bending forces, as well as the increased complexity of installation, which is due to the installation of a large number of bolts necessary to absorb the forces arising in the cornice units under the action of these bending moments.

Also known is a three-hinged frame made of glued wood, including two L-shaped half frames, consisting of rectilinear blocks pivotally coupled in the ridge assembly and articulated on the foundations, while the crossbars and racks of the L-shaped half frames are combined in the cornice assemblies using glued wooden inserts and coupling bolts (Kormakov LI, Valentinavichyus A.Yu. Design of glued wooden structures. - Kiev: Budivelnik, 1983. p. 98, fig. 52, e).

A disadvantage of the known technical solution is the increased material consumption, which is due to the location of the joints of the racks with the crossbars in the zone of maximum bending forces, as well as the increased complexity of installation, which is associated with the need to perceive significant forces arising in the cornice nodes under the action of these bending moments.

The closest technical solution to the claimed utility model is a prefabricated wooden frame, including two L-shaped half-frames, consisting of crossbars and racks in the form of rectilinear blocks, articulated in the ridge assembly and articulated on the foundations, while the crossbars and racks of the semi-frames are combined into cornice nodes using metal clamps, consisting of bolts and corners, and wooden plates on bolts (SU 102293, E04B 1/10, 04/27/1953).

A disadvantage of the known technical solution is the increased material consumption, which is due to the location of the joints of the racks with the crossbars in the zone of maximum bending forces, as well as the increased complexity of installation, associated with the complexity of fastening metal clamps to wooden elements.

The objective of the utility model is to reduce the material consumption and the complexity of mounting a three-hinged prefabricated wooden frame.

The technical result is achieved by the fact that in a three-hinged prefabricated wooden frame, including two L-shaped half-frames, consisting of crossbars and racks in the form of rectilinear blocks with variable cross-section heights and articulated between each other in the ridge assembly, as well as articulated adjacent to the foundations the nodes of the L-shaped half-frames are made in the form of metal inserts, the flanges of which are combined with the wood of the crossbars and racks with glued pins equipped with locking nuts.

The invention is illustrated by drawings:

- FIG. 1 is a general view of a prefabricated wooden frame;

- FIG. 2 - node A in FIG. one;

- FIG. 3 is a section 1-1 in FIG. 2.

The three-hinged prefabricated wooden frame 1 includes two L-shaped half-frames 2, consisting of crossbars 3 and racks 4, made of rectilinear glued blocks with variable cross-sectional heights, united in the cornice unit 5 by a cornice insert 6, welded from metal sheets. In this case, the cornice insert 6 is equipped with end flanges 7, which are combined with the wood of the crossbars 3 and racks 4 with glued pins 8, for example, threaded rods or steel rods with one-way thread, which are fixed to the end flanges 7 with locking nuts 9. Between the wood and the end the flanges 7 are equipped with waterproofing gaskets 10. The joints of the cornice inserts 6 with wooden crossbars 3 and racks 4 are removed from the zone of maximum bending moments arising in the cornice nodes under the action of loads on the three-rails Prefabricated wooden frame 1.

The holes in the end flanges 7 are made according to exact templates and, when installed, coincide with the axes of the glued pins 8 protruding from the ends of the crossbars 3 and racks 4.

The glued pins 8 are intended for the perception of tensile forces arising in the stretched zones of eccentrically compressed cross sections of wooden crossbars 3 and racks 4, and together with the wood of the compressed zone of these sections perceive bending moments and longitudinal forces arising in the joints under the action of loads.

The lengths of the glued pins 8 are accepted sufficient for anchoring them into the wood of the crossbars 3 and racks 4. The transverse forces arising in the joints under the action of loads are perceived by the glued pins 8 working on the shear.

When loading a three-hinged prefabricated wooden frame from straight blocks with full rated loads, the maximum absolute bending moments occur in the cornice nodes and determine the dimensions of the cross sections of the frame first in the cornice nodes, and then, following a linear relationship, in other cross sections of the frame. In this case, the dimensions of the cross-sections of the crossbars 3 and racks 4 linearly decrease from the eaves to the ridge, as well as to the supporting sections. In the case of the location of the joints of the cornice inserts 6 in the zones of “zero” points on the diagram of bending moments, the cross-sectional dimensions of the crossbars 3 and racks 4 will be determined by the values of the bending moments, which are smaller in comparison with the eaves bending moments, which will lead to a decrease in material consumption. At the junctions of the cornice inserts 6 with the wood of the crossbars 3 and racks 4, when they are removed from the zone of maximum bending moments, the forces acting on the glued pins 8 are significantly reduced, which, in some cases, allows their parameters to be accepted as minimally acceptable and their sizes to be determined for structural reasons , which leads to a decrease in the material consumption of the structure, as well as to reduce the complexity of installation.

Using the proposed utility model will reduce the material consumption and the complexity of installing a three-hinged prefabricated wooden frame.

Claims (1)

Three-hinged prefabricated wooden frame, including two L-shaped half-frames, consisting of crossbars and racks in the form of rectilinear blocks with variable cross-sectional heights and jointed pivotally to each other in the ridge assembly, as well as articulated adjacent to the foundations, characterized in that the cornice assemblies Г- The shaped semi-frames are made in the form of metal inserts, the flanges of which are combined with the wood of the crossbars and racks with glued pins equipped with locking nuts.

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