SU1477891A1 - Lattice support - Google Patents

Abstract

The invention relates to the construction of lattice supports. The aim of the invention is to improve the manufacturability and installation. The support grid is placed in parallel planes beyond the dimensions of the branches and diaphragms. At the intersection points of the diaphragms and the grating, profile elements are installed connecting them to the branches. 1 hp f-ly, 5 ill.

Description

one

The invention relates to the construction and can be used in the manufacture and strengthening of two-leg lattice metal supports structures.

The purpose of the invention is to improve the manufacturability and installation.

Figure 1 shows the lattice support, a general view; figure 2 - section aa in figure 1; on fig.Z - support option with continuous profile elements; figure 4 - node I in figure 1; figure 5 - section bb in figure 4.

The lattice support consists of two branches 1, a cross brace 2 and rigid diaphragms 3. The diaphragms b support the dimensions of branches 1 and are installed in all panels of the cross lattice. The braces 2 are installed outside the dimensions of the branches 1 and the diaphragms 3. The braces 2 are made of profile elements installed parallel to each other in the same level in two planes 4 and connected by an additional lattice 5 5.

At the intersection points of the diaphragms 3 and braces 2, sheet elements b are installed, connected to the fascia 7 located along the longitudinal axis of the branches 1. The fasteners 7 can be made of shaped parts: channels or angles. With significant changes in the efforts of the branches x 1 or in the middle sections of the free length of the branches 1 of the fascia 8, it is advisable to carry out continuous (Fig. 3). Diaphragms 3 and branches 1 are connected by parts 9. Attachment

diagonals 2 and diaphragms 3 to the sheet element 6 is made from different sides. The support is operated as follows.

With vertical loads N due to the static indeterminacy of the system, the lattice is turned on: braces 2 are compressed, diaphragms 3 are stretched. The magnitude of the efforts in the lattice can be determined in a precise way on a computer or analytically.

WITH

four

00

with

The additional rigidity of the system is created by a pipette counting $ that can; i is represented as equivalent in rigidity DcmeTKe of the additions of installed elements; in the DSTKOCOB 2 plane,

Their conv. Mr. the cross-sectional area (from the equality of work to longitudinal ribs) is as follows:

AJ. with о.О обm

d. (| j

 7 sin3

AR where L and A., gootpetsvrino square

cross-sections of one popular one-g ect-1 of diagonal 2 and dk- (3; rJ chgol between 2 diagonal

and branches mi 1,

The knot - reiwn (figs, 4 and 5) and the presence of a grille 5, you will create 3 SPCHIGOBAPO t her bone of braces and oi apagm 3 P support5 planes ensure the compatibility of deformations during the bend from the pogogog1, r grid,

On; g with gpttgchchom - guns the branch of the calculation.p1 5 chlotekternnki equal:

A A, + 2-.

(2)

t gt-7 A - 2b iny / nj -

(3)

(BUT)

j 1 nx

t - - 1 A „J

where A is rjiGi rarfb PROPRO (TTNOGO section

  VChO

xn „- I Oiaeir irtapii f ARTs of support vlog h. i gpp and isothermal hj - distance between centers

ticking longitudinal elements about a; rcocos 2

Increase system stiffness from

the plane of the p-search with a symmetric loading of the chi branches with pszzozolnymi forces as a scam-like effect of dp so "- / g A. ik"

Poi transverse forces or equal to the same: / i of the thoracic and branches, the resulting will only spread to the DORK of the load of the corresponding symmettzch g / zhugouzkie.

The Surveys have shown that, due to the shear strength of the pyo-phagus and braces, the supportive influence of the less loaded branch on the more loaded branch is realized.

Q

five

f)

five

Q

five

 fi

with

0

As the distance between the diagonal planes 2 increases and the angle decreases, the rigidity of the system increases from the plane of the pawn, and the metal consumption per branch is reduced accordingly.

The additional rigidity of the branches and the carrying capacity of the system increase with the CONSTITUTION of continuous profile 8 ((lg.W) in the panels where the forces in the branches x1 increase, or in the middle sections of the free branches from the plane. Thus, in the most heavily loaded from the longitudinal or transverse the bending of the legs of the branches decreases the stresses and their rigidity falls away from the pe neTKv plane. In such systems, vc-loBi are created, which create closer to the equal-stable position of the HCPX elements along the length of the support.

The solution can also be used to reinforce existing supports when there is insufficient bearing stiffness of the legs and the grid or there is a significant amount of defects or damage, In some cases, it is sufficient to set up a grid of previously prepared single-type elements without strengthening the branches (FIG. 1) from

The support improves the manufacturability and production of the lattice support due to the same dimensions of the same type diagonal elements, diaphragm. Vezzey support.

Claims (2)

1. Lattice onoos including the branches5 panels of a two-plane diagonal cross lattice5 transverse ,, t diasbram. extending beyond the dimensions of the branches, characterized in that, in order to increase the manufacturability and installation, the support is provided with additional end transverse pyabtoagms, and the lattice is placed in parallel planes beyond the dimensions of the diaphragms to the branches, 514778916 this support is equipped with profile elements 2. Support pop. 1, I distinguish the cops installed along the longitudinal wrench so that the profile elec- tures of the branches and connecting the lastnomlents are made with a length equal to the length of the elements of the diaphragms and the lattice panel of the lattice. No. / Aa c and FIG. 2 fig.z one l ™ k-j FIG A 6-6 7 f FIG. five