RU203077U1 - Frame structure of compound I-section with corrugated wall - Google Patents

Abstract

The utility model relates to the field of construction, namely to the supporting structures of the frame type, and can be used in buildings and structures for industrial and civil purposes. The problem solved by the proposed utility model is to create a frame structure of a composite I-section with a profiled sheet as a corrugated wall, the production of which is possible , both in the factory and in the construction site. The technical result of the proposed utility model is the mobility of the frame structure, i.e. the possibility, if necessary, of its dismantling and disassembly into its constituent elements, transportation in a disassembled state to a new installation site, subsequent assembly and reuse, without reducing the bearing capacity and performance.

Description

The utility model relates to the field of construction, namely to the supporting structures of the frame type, and can be used in buildings and structures for industrial and civil purposes. Known frame metal structure of the type "Alma-Ata", in which the racks are made of wide-flange I-beams, and the crossbar is a welded I-beam with a thin transversely corrugated wall (Metal structures. In 3 vol. Vol. 2. Steel structures of buildings and structures. (Designer handbook) ) / Under the general editorship of V.V.Kuznetsov - M .: ASV, 1998. - 512 pp. P.223.).

The disadvantage of the design is the need for special equipment for the corrugation and welding of the girder, i.e. increased labor intensity, "binding" to a specific manufacturer and a concomitant increase in transport costs for the delivery of finished shipping stamps to the construction site.

The closest in technical essence to the claimed utility model is a frame structure with variable-corrugated elements [RF patent for utility model No. 114981, IPC E04C 3/07], consisting of a cross-section transom and struts, in accordance with the nature of the distribution of internal forces. In this case, the variable corrugation of the girder wall and struts consists in the fact that corrugations of greater rigidity are rationally used in areas with a predominance of transverse forces, followed by a change in the parameters of the corrugations (pitch and / or height) in accordance with the change in the intensity of transverse forces, bending and torque moments.

Disadvantages of the design are:

complex parameters of variable corrugation requiring special production technology;

low mobility of the structure due to its assembly from large factory brands and the use of permanent welded joints.

The technical result of the proposed utility model is the mobility of the frame structure, i.e. the possibility, if necessary, of its dismantling and disassembly into its constituent elements, transportation in a disassembled state to a new installation site, subsequent assembly and reuse, without reducing the bearing capacity and performance.

The technical result is achieved due to the fact that the frame structure consists of a crossbar and struts of a composite I-section with upper and lower chords and a corrugated wall, a nodal ridge part, nodal cornice parts, flange connections, connecting strips, and belts, corrugated walls, nodal parts ( cornice and ridge), connecting strips are combined by means of detachable joints (galvanized self-tapping screws, bolts, screws) into a single frame structure.

Angles, channels, closed profile can be used as belts.

The corrugated walls are made of profiled sheet.

The essence of the proposed utility model is illustrated by drawings:

Figure 1 is a cross-sectional view of the frame structure;

Figure 2 is a section a-a in figure 1;

Figure 3 is a section b-B in figure 2;

Figure 4 is a cross-sectional view of an element of the frame structure (crossbar and rack) when used as belts of corners;

Figure 5 is a cross-section of an element of the frame structure (crossbar and rack) when used as chords of channels;

Fig. 6 is a cross-sectional view of an element of the frame structure (crossbars and posts) when used as belts of a closed profile;

Fig. 7 is a diagram of the assembly of a frame structure element using corners as chords of a composite section;

Fig. 8 is a diagram of the assembly of a frame structure element using channels as chords of a composite section;

Figure 9 is a diagram of the assembly of a frame structure element when using a closed profile as chords of a composite section.

The frame structure of a composite section with a corrugated wall (see Fig. 1) has an optimal shape, from the point of view of material distribution, close to the outline of the bending moment diagram. The maximum values of the heights of the sections in the ridge and eaves nodes and the minimum - at the points of intersection of the diagram of the moments of the neutral axis in the girder and in the nodes of the support of the racks on the foundations.

The component parts of the frame structure are the girder 1, the posts 2, the nodal ridge part 3, the nodal cornice parts 4, which are combined into a single structure during installation using bolted flange connections 5. The eaves knot means the connection of the girder 1 with the post 2, and the ridge knot means the connection of the symmetrical halves of the girder 1 in the center of the frame. Details of these units are factory-made.

The assembly of the structure of the claimed utility model is carried out as follows. After preliminary cutting of the chords 6, 7 and the profiled sheet of the wall 8 (part of the composite section of the girder 1 and the posts 2) at the factory or in the conditions of the construction site, two symmetrical halves of each element are assembled on the striker.

The corrugated wall is attached to the belts (see Fig. 2, Fig. 3) using fasteners 9. The two halves are combined in a single structure. The corrugated walls of the halves are fastened together with fasteners 9 with a calculated step.

To ensure the joint operation of the rolling elements of the chords 6, 7 and to increase their rigidity and stability from the plane of the frame, connecting strips 10 are attached to them with the help of fasteners 9 with a certain calculated pitch.

At the final stage, flanges 5 made of sheet steel are mounted to the main structure to organize the mounting joints.

Thus, the transom and frame posts, consisting of many individual elements, can be assembled using detachable joints (galvanized screws, bolts, screws) at the factory, and delivered to the construction site in the form of shipping marks for subsequent installation. Or it can be delivered fully disassembled to carry out all technological operations directly at the construction site.

The scope of the utility model provides for the use as belts of a composite section of rolled products of various profiles (see Fig. 4, Fig. 5, Fig. 6). The work of a frame structure with a corrugated wall under load (vertical, horizontal, and their combinations) is characterized by the fact that the frame elements experience lateral bending. In this case, the corrugated wall 3 is practically not included in the bending work and normal stresses in the girder and uprights are perceived by the belts 6, 7. Longitudinal forces (vertical forces in the uprights 2, the thrust in the crossbar 1) are completely taken up by the belts 6, 7, due to the small stiffness of the wall 3 along the corrugations. The corrugated wall 3 works in shear and perceives shear forces and torques. Horizontal reactions from posts 2 are perceived by the foundation structure or by tightening.

Due to double corrugation of the frame wall, the rigidity of the entire structure increases and the stability of the compressed upper girder belt from the plane of the frame increases.

In addition, the design is tolerant of manufacturing errors in the conditions of the construction site, due to the redistribution of efforts, does not require highly qualified personnel and expensive installation equipment.

Advantages of a frame structure with a corrugated sheet as a corrugated wall:

availability of materials;

multiple use (collapsible) of the frame;

cutting and assembly can be carried out in the conditions of a construction site;

no need for highly qualified personnel at the construction site, due to the simplicity of cutting steel elements and assembling them into a single structure;

the design is tolerant of manufacturing errors at the construction site;

the ability to deliver structural elements to the assembly site in packages, which will reduce transportation costs, especially for hard-to-reach and remote areas;

increased corrosion resistance and durability due to high-quality and technologically advanced zinc coating;

implementation of the principle of fractional stress and viscosity of work of joints, which increases the survivability of the structure

the ability to select a section for a specific load or a range of loads, the bearing capacity of the frame can be changed by varying the thickness of the corrugated wall, by adding additional sheets in the most loaded areas;

high maintainability.

Thus, the specified technical result is achieved, which is a solution to the urgent problem:

saving material resources - low cost and availability of raw materials (profiled sheet, self-tapping screws / bolts / screws), as well as the possibility of reuse;

shortening the construction period - the speed of connecting the elements, cutting the profiled sheet according to ready-made drawings does not require complex mechanisms (angle grinder is used) and large labor costs;

reduction of transport costs - transportation of small-sized elements is possible in a standard truck body.

Claims (7)

1. A frame structure, including the components of posts and girders having an I-section with upper, lower chords and a corrugated wall, nodal ridge and cornice parts, combined into a single structure using bolted flange connections, characterized in that the I-section is formed from individual elements consisting of double profiled wall sheets, upper and lower chords located on the outside of each of the profiled sheets and connected by connecting strips, while the profiled sheets are interconnected, and the upper and lower chords are attached to the profiled sheets and connecting strips when using detachable connections. 2. The frame structure according to claim 1, characterized in that corners are used as belts. 3. The frame structure according to claim 1, characterized in that channels are used as belts. 4. The frame structure according to claim 1, characterized in that a closed profile is used as the belts. 5. The frame structure according to claim 1, characterized in that screws are used as connections. 6. The frame structure according to claim 1, characterized in that self-tapping screws are used as connections. 7. The frame structure according to claim 1, characterized in that bolts are used as connections.

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