RU2183708C1 - Metal building frame - Google Patents

Abstract

FIELD: civil engineering, in particular, metal frames of multispan buildings. SUBSTANCE: the metal frame of a multispan building has I-shaped columns, having bearing members at the level of the floors, they are positioned on the outer side of the flanges of the I-shaped columns. The beams are built up of two metal members of channel bar or I-shaped section, which by the upper flanges are hanged and rest against the column bearing members. The beams are made continuous and may have an inner reinforced- concrete member located in the cavity between the metal members. EFFECT: reduced acting loads and thus reduced specific consumption of materials. 4 cl, 4 dwg

Description

 The invention relates to the field of construction, namely to metal frames of multi-span buildings of small floors.

 Metal frames of buildings are known, including columns, beams and floor slabs (see, for example, V.K. Faybishenko's book "Metal Structures", 1984, p. 159, Fig. 132).

 The technical solution (prototype) closest to the invention is the metal frame of the building, including I-beam columns, beams and ceilings connected to it (see, ibid., P. 73, 74, Fig. 50).

 A significant drawback of the known solutions is the high metal consumption of the metal frame structures due to significant efforts in the beams, which leads to a rise in the cost of the building as a whole.

 The problem, the solution of which the invention provides, is to reduce the material consumption of the frame and, thus, the cost of the building by reducing the effort in the beams.

 The essence of the invention lies in the fact that in the metal frame of the building, including columns having an I-section, beams and ceilings connected to them, the columns are made with supporting projections for beams located on the outside of the I-beam shelves, the latter being made up of two elements [- shaped or I-shaped section, supported by the inner surface of the upper shelves on the supporting protrusions, and the overlap is located on the upper shelves of the elements of the beams.

 The cavity between the beam elements can be filled with monolithic reinforced concrete, forming the inner beam element, at the level of which a hole can be formed in the walls of the I-beams.

 Beams can be made continuous for the entire length or width of the building.

 Compared with the prototype (a book by V. K. Faibishenko, p. 73, 74, Fig. 50), the invention contains new features, namely that the column shelves are parallel to the beams, and the columns are made with supporting projections located on the outside of the I-beam shelves (for example, made of a plate rigidly connected to the column) for beams, while the latter are made up of two elements of [-shaped or I-shaped section, supported by the inner surface of the upper shelves on the support ledges, and the overlap is located on the upper lakh elements of beams. When using the I-shaped section in the beam and monolithic overlap, it is possible to support the overlap on the lower shelf.

 The cavity between the elements of the beam can be filled with monolithic reinforced concrete, forming the inner element of the beam.

 At the level of the internal element of the beam, holes can be formed in the walls of the I-beams of the columns to make the beams continuous with the entire length or width of the building.

The invention is illustrated by drawings, which depict:
- figure 1 - metal frame of the building, plan;
- figure 2 is the same, a section along aa in figure 1;
- figure 3 - connection of the column with the beam, node B in figure 2;
- figure 4 is a beam, section aa in figure 1.

 The metal frame of a multi-span building includes metal columns 1 of an I-section located at the nodes of the intersection of the grid of mutually perpendicular axes.

 Columns 1 are pivotally connected to beams 2 (Fig. 1), which are made of two metal supporting elements 3 and 4 having a [-shaped or I-shaped cross section, that is, made in the form of a channel or an I-beam, while the shelves I-columns of columns 1 parallel to the beams 2.

 The metal elements 3 and 4, forming the beam 2, are hung and supported on the support projections 5 located on the outside of the flanges of the I-beams of columns 1 so that the walls of the I-beams of the latter are perpendicular to the walls of the channels or I-beams of elements 3 and 4 beams (figure 3). The supporting protrusions 5 can be made in various, known manner, for example, in the form of a plate rigidly connected to the column 1.

 In FIG. 3 shows a possible installation of elements 3 and 4 with the help of additional angles 6, connected by welding with supporting projections 5.

 The choice of the section of elements 3 and 4 is carried out on the basis of calculations based on the loads acting on the beam 2, in particular, an I-section is taken for more significant loads.

 The cavity between the elements 3 and 4 can be filled with monolithic reinforced concrete (Fig. 4), forming an internal supporting element 7 of the beam 2, for which holes 8 are made continuous in the walls of the I-beams of columns 1 (Fig. 3).

 The overlap 9 is made of separate plates located on the upper shelves of channels or I-beams of elements 3 and 4 (figure 4). It is also possible its implementation from monolithic reinforced concrete and the location on the lower shelves of elements 3 and 4, if the latter are made in the form of I-beams. Vertical links 10 are established along the axes of columns 1. In addition, with significant spans, the beams can be connected to the extreme columns not articulated, but rigidly, in any known manner (not shown in the drawing).

The metal frame of the building works as follows:
Horizontal and vertical loads are perceived by the multi-span frame of the building. Horizontal loads are transmitted through the floor disks 9 and are perceived by vertical links 10. The vertical loads are perceived by beams 2 and columns 1.

 When the internal reinforced concrete element 7 is installed, the latter perceives operational loads, and the metal elements 3 and 4 perceive mounting loads.

 As preliminary calculations showed, the invention allows to reduce the moments acting on the beam by 1.5 - 2 times, and to reduce the deflection of the beam by 4 - 5 times, which allows, accordingly, to reduce the metal consumption of the frame, and also, if necessary, reduce the height of the beams.

 This is due to the fact that the metal elements of the beams perceive only mounting loads, and in the case of continuous beams, the reduction in effective moments occurs due to plastic deformations in the latter.

Claims (4)

 1. The metal frame of the building, including columns having an I-section, beams connected to them, and ceilings, characterized in that the columns are made with supporting projections for beams located on the outside of the I-beam shelves, the latter being made up of two elements [-shaped or I-shaped section, supported by the inner surface of the upper shelves on the support ledges, and the overlap is located on the shelves of the elements of the beams.  2. The metal frame according to claim 1, characterized in that the cavity between the elements of the beam is filled with monolithic reinforced concrete forming the inner element of the beam.  3. The metal frame according to claim 1 or 2, characterized in that a hole is formed in the wall of the I-beam of columns at the level of the internal element of the beam.  4. The metal frame according to any one of paragraphs. 1, 2 or 3, characterized in that the beams are made continuous for the entire length or width of the building.

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