Structure for reducing horizontal counter-force of large-span steel roof truss gable wall support of industrial factory building

Abstract

The utility model provides a structure for reducing horizontal counter-force of a gable support of a large-span steel roof truss of an industrial factory building. The structure comprises a bent frame column, a bracket is installed on one side of the bent frame column, a cross beam is installed on the bracket in a sliding mode, a steel roof truss support is installed on the bent frame column, and a steel roof truss is installed on the steel roof truss support in a bearing mode. According to the utility model, the bracket is additionally arranged, and the sliding structure of the connecting node of the cross beam and the bent frame column is realized through the bracket, so that the horizontal displacement and rotation constraint of the cross beam on the bent frame column can be canceled, the constraint of the bent frame column on the steel roof truss is canceled, the cross beam can generate free displacement along the axial direction of the cross beam relative to the bent frame column, and extra horizontal counter force is canceled; and the horizontal counter-force of the support is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of steel structure technology in civil engineering, and in particular to a structure for reducing the horizontal reaction force of the gable support of a large-span steel roof truss in an industrial plant. Background Technology

[0002] In industrial plant structures, the combination of a large-span steel roof truss and a lower concrete frame structure is widely used. This structural form has significant advantages: the frame structure can create a large space between the frame columns, facilitating the movement of overhead cranes and the lifting and maintenance of equipment; the large-span steel roof truss can create a large clear height, meeting the space utilization requirements of the plant's interior.

[0003] The large-span steel roof truss is connected to the frame columns via hinged supports. These supports bear the horizontal and vertical loads transmitted from the roof truss and transfer these loads to the frame columns. At the ends of the factory building, due to the presence of wind-resistant columns, these columns and the frame columns at the ends of the building are combined into a frame via beams. These beams constrain the frame columns at the ends of the building, making it difficult for them to experience relative lateral displacement. Because the frame columns are connected to the steel roof truss, this constraint is further transferred, resulting in the frame columns also constraining the steel roof truss, making it difficult for the roof truss supports to experience relative horizontal displacement.

[0004] The constraints of the beams on the frame columns and the frame columns on the steel roof trusses, while limiting the displacement of the steel roof truss supports, generate additional horizontal reaction forces, ultimately resulting in a larger horizontal reaction force at the roof truss supports.

[0005] To address the issue of significant horizontal reaction forces at the steel roof truss supports on the gable side of the factory building, existing technologies primarily offer two solutions: First, eliminate the beams connecting the beams to the frame columns on the gable side. This removes the constraints on the frame columns and steel roof trusses, eliminating the additional horizontal reaction forces and thus reducing the support's horizontal reaction force. Second, modify the connection between the beams and frame columns on the gable side of the factory building into a hinged structure. This method reduces some of the constraints, thereby reducing some of the additional horizontal reaction forces.

[0006] Of the solutions mentioned above, Solution 1 does directly reduce the horizontal reaction force at the steel roof truss supports, but the removal of the crossbeams makes it difficult to close the gable walls at the ends of the factory building, as the profiled steel sheet walls or masonry walls of the gable walls cannot be anchored on the horizontal crossbeams. Solution 2, while reducing some of the horizontal reaction force at the steel roof truss supports, has minimal effect. This is because the crossbeams primarily constrain the horizontal relative displacement of the frame columns and steel roof trusses. Changing the connection between the crossbeams and the frame columns to a hinged structure only eliminates the angular constraint of the crossbeams on the frame columns; the horizontal relative displacement constraint still exists, so the horizontal reaction force at the steel roof truss supports remains relatively large. Utility Model Content

[0007] To address the aforementioned issues, this utility model aims to propose a structure that reduces the horizontal reaction force at the gable support of a large-span steel roof truss in industrial plants. By adding corbels, a sliding structure is achieved at the connection node between the beam and the frame column. This eliminates the horizontal displacement and rotation constraints of the beam on the frame column, thereby eliminating the constraint of the frame column on the steel roof truss. This allows the beam to freely displace along the axial direction relative to the frame column, eliminating additional horizontal reaction force and effectively reducing the horizontal reaction force at the support.

[0008] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0009] A structure for reducing the horizontal reaction force of the gable support of a large-span steel roof truss in an industrial plant includes a frame column, a corbel installed on one side of the frame column, a crossbeam slidably installed on the corbel, a steel roof truss support installed on the frame column, and a steel roof truss mounted on the steel roof truss support.

[0010] Furthermore, a first protective plate is pre-embedded at the top of the corbel, and a second protective plate is pre-embedded at the bottom of the crossbeam, with graphite powder laid between the first and second protective plates.

[0011] Furthermore, the thickness of the graphite powder is 0.8-0.12 mm.

[0012] Furthermore, angle steel is installed on both sides of the first protective plate, and a slot is formed between the two angle steels to support and limit the crossbeam.

[0013] Furthermore, the first protective plate and the second protective plate are steel plates, PTFE plates, or plastic sheets.

[0014] Beneficial effects: By adding corbels, this utility model achieves a sliding structure at the connection node between the beam and the frame column, which eliminates the horizontal displacement and rotation constraints of the beam on the frame column, thereby eliminating the constraints of the frame column on the steel roof truss. This allows the beam to move freely along the axial direction relative to the frame column, eliminating additional horizontal reaction force and effectively reducing the horizontal reaction force at the support. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0016] Figure 1 This is a schematic diagram illustrating the construction of reducing the horizontal reaction force of the gable support of a large-span steel roof truss in an industrial plant, as described in an embodiment of this utility model.

[0017] Figure 2 for Figure 1 Enlarged schematic diagram of section A in the middle. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Design Concept: The supports of large-span steel roof trusses in industrial plants experience very large horizontal reactions on the gable walls. Meeting these horizontal load-bearing requirements would be prohibitively expensive, neither economical nor reasonable. Therefore, to reduce the horizontal reactions at the steel roof truss supports, it is necessary to reduce the constraint of the supports on the horizontal displacement of the steel roof truss and the constraint of the crossbeams on the horizontal displacement of the frame columns. Simultaneously, to facilitate the closure of the gable walls at the plant ends, the crossbeams must be retained.

[0021] Example 1

[0022] Based on the above design concept, see Figure 1-2 This embodiment describes a structure for reducing the horizontal reaction force of the gable support of a large-span steel roof truss in an industrial plant. It includes a frame column 1, a corbel 2 installed on one side of the frame column 1, a crossbeam 3 slidably installed on the corbel 2, a steel roof truss support installed on the frame column 1, and a steel roof truss mounted on the steel roof truss support.

[0023] This embodiment adds a corbel to achieve a sliding structure at the connection node between the beam and the frame column. This eliminates the horizontal displacement and rotation constraints of the beam on the frame column, thereby eliminating the constraints of the frame column on the steel roof truss. This allows the beam to move freely along the beam's axial direction relative to the frame column, eliminating additional horizontal reaction forces and effectively reducing the horizontal reaction force at the support.

[0024] In a specific example, a first protective plate 4 is pre-embedded at the top of the corbel 2, a second protective plate 5 is pre-embedded at the bottom of the crossbeam 3, and graphite powder is laid between the first protective plate 4 and the second protective plate 5.

[0025] In this embodiment, graphite powder is used to reduce the sliding friction between the crossbeam and the bracket. In addition, the first protective plate and the second protective plate are used to improve the wear resistance of the crossbeam and bracket structure.

[0026] In one specific example, the thickness of the graphite powder is 0.8-0.12 mm.

[0027] In a specific example, angle steel 6 is installed on both sides of the first protective plate 4, and a slot is formed between the two angle steel 6 to support and limit the crossbeam 3.

[0028] In the specific implementation, two sets of angle steel are welded to the first protective plate at the top of the bracket to prevent the crossbeam from deforming except along the axis of the crossbeam; in this embodiment, the angle steel is close to the crossbeam but not welded to it for lateral limiting of the crossbeam.

[0029] In a specific example, the first protective plate 4 and the second protective plate 5 are steel plates, PTFE plates, or plastic sheets.

[0030] In summary, existing solutions for excessive reaction forces at the steel roof truss supports on the gable side of a factory building, such as eliminating the crossbeams, can indeed directly reduce the horizontal reaction forces at the steel roof truss supports. However, this elimination makes it difficult to close the gable end of the factory building, as the profiled steel sheet wall or masonry wall of the gable cannot be anchored on the horizontal crossbeams. This embodiment retains the crossbeams while reducing the horizontal reaction forces at the steel roof truss supports, facilitating the anchoring of the profiled steel sheet wall or masonry wall of the gable on the horizontal crossbeams.

[0031] Changing the connection between the beam and the frame column to a hinged structure can reduce some of the horizontal reaction force at the steel roof truss support, but the effect is minimal. This is because the beam's constraint on the frame column and steel roof truss mainly restricts their relative horizontal displacement. Changing the connection between the beam and the frame column to a hinged structure only eliminates the beam's angular constraint on the frame column; the relative horizontal displacement constraint still exists, so the horizontal reaction force at the steel roof truss support remains relatively large. This embodiment eliminates the beam's relative horizontal displacement constraint on the frame column, thereby eliminating the frame column's constraint on the steel roof truss, eliminating the additional horizontal reaction force, and effectively reducing the horizontal reaction force at the support.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A structure for reducing the horizontal reaction force at the gable support of a large-span steel roof truss in an industrial plant, characterized in that, The system includes a frame column (1), a bracket (2) installed on one side of the frame column (1), a crossbeam (3) slidably installed on the bracket (2), a steel roof truss support installed on the frame column (1), a steel roof truss supported on the steel roof truss support, a first protective plate (4) pre-embedded at the top of the bracket (2), a second protective plate (5) pre-embedded at the bottom of the crossbeam (3), and graphite powder laid between the first protective plate (4) and the second protective plate (5).

2. The structure for reducing the horizontal reaction force of the gable support of a large-span steel roof truss in an industrial plant, as described in claim 1, is characterized in that... The thickness of the graphite powder is 0.8-0.12 mm.

3. The structure for reducing the horizontal reaction force of the gable support of a large-span steel roof truss in an industrial plant, as described in claim 1, is characterized in that... Angle steel (6) is installed on both sides of the first protective plate (4), and a slot is formed between the two angle steels (6) to support and limit the crossbeam (3).

4. The structure for reducing the horizontal reaction force of the gable support of a large-span steel roof truss in an industrial plant, as described in claim 1, is characterized in that... The first protective plate (4) and the second protective plate (5) are steel plates, polytetrafluoroethylene plates, or plastic sheets.

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