SU1654483A1 - Rest unit for solid wooden girder - Google Patents

Abstract

The invention relates to construction and is intended for load-bearing timber structures of buildings and structures. The purpose of the invention is to increase the carrying capacity under alternating loads and simplify installation. The assembly of the continuous wood beam 1 on the intermediate support 2 includes a support plate 3 and operative rods 4 glued into the wood beams. Vertical U-shaped brackets 5 are fixed to the support plate 3. The transverse rib 6 is freely mounted on the support plate 3 under the brackets 5. Beam 1 has a top 7 and a bottom 8 lining of varying thickness, reinforcing sa beams and fastened to the beam with V-shaped rod anchors 9 glued into wood. The thicknesses of the plates 7 and 8 are made decreasing from the anchor support closest to the axis to the edges of the beam, and the support rods 4 are set at an angle of 15 °. a 45 ° amp; each other symmetrically to the axis of the support and attached to the transverse edge 6. 3 Il.

Description

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The invention relates to construction and is intended for load-bearing timber structures of buildings and structures.

The purpose of the invention is to increase the carrying capacity under alternating loads and simplify installation.

Figure 1 shows the assembly of a continuous wooden beam on an intermediate support; figure 2 - section aa in figure 1: fig.Z - section bb in fig. one.

The assembly of the continuous wood beam 1 on the intermediate support 2 includes a support plate 3 and support rods 4 glued into the wood beams 4. Vertical U-shaped brackets 5 are fixed to the support plate 3. Transverse edge

6 is loosely mounted on the support plate 3 under the brackets 5. The beam 1 has an upper

7 and the bottom 8 lining of variable thickness, reinforcing sa beams and mounted on the beam with V-shaped rod anchors 9, glued into the wood. The thickness of the plates 7 and 8 is made decreasing from the anchor support nearest to the axis to the edges of the beam, and the support rods 4 are set at an angle of 15 ° and 45 ° to each other symmetrically with the axis of the support and attached to the transverse edge 6.

The peculiarities of the node operation under load are that the forces from beam 1 are transmitted through V-shaped anchors 9 to the plates 7, 8, which perform the main role: they take on themselves a part of the effort from the bending moment, which in continuous beams above the supports may be higher than in the span. Local amplification allows one to calculate at the time of flight, i.e. reduce wood consumption by 30%. If the joint of wooden elements is arranged above the support, then the reinforcing plates perceive all the calculated force. In this case, the number of nkers is determined by calculation and, in view of the stepwise propagation of forces (increasing towards the middle), the cross section of the plates 7, 8 is variable. The V-pattern on the structure “, | I of the anchors 9 ensures the perception of the efforts of a different sign. In order to ensure the stability of the reinforcing pads, when they are operated in compression along the length, they are fastened to the transverse connecting elements 10.

It is advisable that the lining intersects every second V-anchor from the support, since in this case the lining also works together with the anchors at the section reduction section. To increase

shear stiffness of continuous wood beams on poles (where the greatest shear forces are concentrated) and perceptions of normal stresses across

fibers obliquely glued anchors of 9 opposite edges of the beam are installed with overlap in the thickness of the beams.

The support rods 4 are glued to a depth of 0.7 of the height of the beam so that their releases

welded to the transverse edge 6 (across the axis of the beam), and the other ends are branched at an angle of 15 °. At an angle of 15 °, wood between the rods is excluded from work due to the application of forces in adjacent rods. When a is 45 ° in the cores, great efforts arise in the decomposition of the support reactions, which leads to a decrease in the bearing capacity of the node due to the beam separation. Rods insertion depth 4

greater 0.7 heights is due to the fact that, with a smaller depth at the end of the rods, a concentration of tangential stresses occurs in the wood, which leads to spall fracture. Move

support rods vertically limited to U-shaped brackets 5.

The positive effect of the proposed technical solution is expressed in increasing the carrying capacity of continuous

Sticks due to the rational distribution of forces between the wood and metal components of the node.

Claims (1)

Invention Formula The assembly of the continuous wood beam on an intermediate support, including a support plate and support rods glued into the wood, is characterized in that, in order to increase load capacity with alternating load and ease of installation, it is equipped with vertical U-shaped brackets attached to the base plate, transverse edge, freely mounted on the plate under the U-shaped brackets, upper and lower plates of variable thickness, reinforcing sa on the beam, and V- shaped rod anchors glued into the timber beams, with the thickness Nak / Tadka is made decreasing from the V-shaped anchor near the axis of the support, to the edges of the beam, and the supporting rods are installed under the UGP 15 ° and 45 ° to each other symmetrically to the axis of the support and attached to cross edge. Aa 7 frJS eight five FIG. 2 BOB eight Fi.Z 2