RU2528640C1 - Building cover - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: building cover includes bearing elements, for instance, in the form of light trusses installed with equal pitch 1. Panels of profiled deck are laid onto bearing elements. Panels of the profiled deck via one step of bearing elements are laud in accordance with the double-cantilever pattern, and non-standard precast sheets of profiled deck are laid onto the ends of cantilevers. At the same time the length of cantilevers equals to: $$a=\left(\frac{\lambda -\sqrt{{\lambda }^2-\lambda }}{4}\right)\cdot l$$

, here l - pitch of bearing elements; λ=(W₂/W₁+1), where W₁ - rated resisting moment of profiled deck with pressed narrow shelves; W₂ - the same with pressed wide shelves.

EFFECT: reduced consumption of steel onto cover elements.

4 dwg

Description

The invention relates to the field of construction, namely, coatings for light buildings.

A coating is known, including load-bearing structures in the form of trusses, girders on which profiled steel flooring is laid [AC No. 947340. IPC E04B 7/00. Bulletin No. 28 of 07.30.82].

A disadvantage of the known coating is the increased consumption of steel on profiled steel flooring, laid according to a single-span scheme.

Another coating of the building is known, including load-bearing elements installed in the form of trusses with equal pitch, according to which the panels of a profiled flooring asymmetrical in cross-sectional height with a shift of adjacent panels by the step of the load-bearing structures are laid in continuous form [AS No. 1036870. Bulletin No. 31 of 08.23.83].

A disadvantage of the known coating of the building is the increased consumption of steel on the panel of the profiled flooring laid according to a multi-span continuous structure and on load-bearing elements calculated for a load exceeding 10% of the nominal value.

Closest to the invention is a building covering, including load-bearing structures, for example, in the form of trusses and profiled flooring, laid after one step of load-bearing structures according to a two-console scheme, and additional flooring sheets according to a single-span scheme are laid between the ends of the consoles of adjacent flooring sheets [RF Patent No. 2476647 . IPC E04B 1/24. Bulletin No. 32 of November 20, 2012].

The disadvantage of building coverage is that, with an asymmetric section of the profiled flooring sheets, the value of the bending moments depends on the length of their cantilever sections, which, if they are not optimal and the bearing structures are unequally pitch, leads to overuse of metal.

The invention is aimed at reducing the consumption of metal on a profiled flooring and the possibility of using the same bearing support elements of the coating.

The purpose of the invention is achieved by the fact that in the known building covering, including load-bearing structures, for example, in the form of trusses and sheets of profiled flooring, laid after one step of the load-bearing structures in a two-conductor pattern, between the ends of the consoles of adjacent sheets of profiled flooring additional sheets are laid according to a single-span scheme, according to The invention, the supporting structures are installed with equal pitch, and the length of the cantilever sections of the sheets of the profiled flooring asymmetric in cross-sectional height is:

, $$a=\left(\frac{\lambda -\sqrt{{\lambda }^2-\lambda }}{\mathrm{four}}\right)\cdot l$$

,

here l is the step of the supporting elements; λ = (W ₂ / W ₁ +1), where W ₁ is the calculated moment of resistance of the profiled flooring with compressed narrow shelves; W ₂ - the same with compressed wide shelves.

Figure 1 shows a fragment of the floor plan of the building, and figure 2 is a transverse section through the coating (section 1-1 in figure 1); figure 3 shows a longitudinal section through the coating (section 2-2 in figure 1); figure 4 shows a cross section of a sheet of profiled flooring asymmetric in height of the cross section, where h = h ₁ + h ₂ is the height of the cross section of the profiled flooring.

The coating of the building includes load-bearing structures 1, for example, in the form of trusses (figure 2), installed with equal pitch l (figure 1 and figure 3). On the supporting elements 1 laid sheets profiled flooring asymmetric section 2 (figure 4). Sheets of profiled flooring 2 are laid after one step of the supporting structures 1 according to a two-console scheme. At the ends of the consoles of adjacent sheets 2 laid additional sheets of profiled flooring 3 (figure 1 and figure 3). The length of the cantilever sections of the flooring (a) is taken equal to:

, $$a=\left(\frac{\lambda -\sqrt{{\lambda }^2-\lambda }}{\mathrm{four}}\right)\cdot l$$

,

here l is the step of the supporting elements; λ = (W ₂ / W ₁ +1), where W ₁ is the calculated moment of resistance of the profiled flooring with compressed narrow shelves; W ₂ - the same with compressed wide shelves.

The device covering the building is carried out in the following sequence. First, with equal pitch l (Fig. 1), load-bearing structures 1 are installed, then sheets of profiled flooring 2 are laid in a two-cantilever pattern after one step. After installation of two-console sheets 2 of profiled flooring, additional sheets of profiled flooring 3 are installed on the ends of consoles of sheets 2 adjacent along the length of the building. .

The proposed coating of the building due to the appointment of the optimal parameters of the consoles, ensuring the equality of support and span bending moments, allows to reduce the consumption of steel on the profiled flooring by 10-12% (see additional material), and the appointment of an equal step of the supporting structures allows the use of the same type of supporting coating structures .

Claims (1)

The building covering, including load-bearing structures, for example, in the form of trusses, and sheets of profiled flooring, laid after one step of load-bearing structures in a two-console scheme, and additional sheets of profiled flooring, laid according to a single-span scheme, characterized in that the load-bearing structures are installed with equal pitch, and the length of the cantilever sections of the sheets of the profiled flooring asymmetric in height of the cross section is:

,
here l is the step of the supporting elements; λ = (W ₂ / W ₁ +1), where W ₁ is the calculated moment of resistance of the profiled flooring with compressed narrow shelves; W ₂ - the same with compressed wide shelves.

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