Lateral supporting structure of large-span high-section steel beam

Abstract

The utility model belongs to the technical field of steel structure buildings, and particularly relates to a lateral supporting structure of a large-span high-section steel beam, which comprises a steel beam with an I-shaped section; the end part of the tie bar is connected to the upper flange of the steel beam; a notch is formed in the tie bar; the stiffening plate is tightly attached to the steel beam web; a lifting lug is arranged at the joint of the stiffening plate and the tie bar; one end of the knee brace is connected to the lower flange of the steel beam, and the other end is connected with the tie bar through a gusset plate; the end, away from the angle brace, of the gusset plate penetrates through the notch in the corresponding position and is welded to the tie bar. The problem that a large-span high-section steel beam is prone to instability damage outside a plane can be solved, and the large-span high-section steel beam has good market application prospects.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel structure buildings, and in particular relates to a lateral support structure of a large-span and high-section steel beam. Background Art

[0002] With the continuous development of construction technology, the application of steel structures is becoming more and more extensive, the span of buildings is getting larger and larger, and the cross-sectional height of roof steel beams is often relatively high. Steel beams usually adopt an I-shaped cross-section, with strong in-plane stiffness, but weak out-of-plane lateral stiffness, which is very easy to cause lateral bending and torsion out of the plane, resulting in overall instability and failure, and then losing the ability to continue to bear. Therefore, the design sets the corner brace and purlin to form a corner brace-purlin support system, and the lateral force borne by the compressed flange of the steel beam is shared by the supports on both sides. The two work together to improve the overall stability of the steel beam out of the plane.

[0003] For the lateral support of large-span and high-section steel beams, the lateral force will be very large, and the strength of the corner brace is usually easy to meet the requirements. However, the purlins connected to the corner brace are made of cold-bent thin-walled steel, so the strength and rigidity are relatively weak, and special calculations are required to increase the purlin section. In order to solve the problem that large-span and high-section steel beams are prone to instability and failure outside the plane, this application proposes a lateral support structure for large-span and high-section steel beams.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0005] The utility model aims to provide a lateral support structure of a large-span and high-section steel beam, so as to solve the problem that the large-span and high-section steel beam is prone to instability and damage outside the plane.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A lateral support structure of a large-span high-section steel beam, comprising: a corner brace, a node plate, a tie rod and a stiffening plate; wherein:

[0008] One end of the corner brace is set at the lower flange of the high-section steel beam, and the other end is connected to the tie rod through the node plate; the corner brace can be regarded as an elastic support for the high-section steel beam, and is the main component to ensure the stability of the lower flange of the steel beam under pressure outside the plane;

[0009] The gusset plate is a connecting plate that extends out from the end of the corner brace to connect the tie rod. It is an important connecting member. Through the connection of the gusset plate, the load on the corner brace is directly transferred to the tie rod.

[0010] Stiffeners are used to strengthen the connection between corner braces, tie rods and high-section steel beams, providing additional support and stability to prevent the web of the steel beam from buckling when subjected to loads.

[0011] The two ends of the tie rod are respectively connected to the upper flanges of the two longitudinal steel beams to provide lateral support points for the upper flanges of the steel beams.

[0012] Preferably, the corner brace is made of Q235B equilateral angle steel, and the included angle between the corner brace and the web of the steel beam is 30° to 60°, preferably 45°.

[0013] Preferably, the node plate is a steel plate with a slot at the tie rod. The node plate is welded to the tie rod after passing through the slot, and bolt holes are reserved on the corner brace side for connecting the corner brace.

[0014] Preferably, the tie rods are made of Q235B round steel tubes, and the ends are sealed with connecting plates that are connected to the steel beam stiffening plates via bolts.

[0015] Preferably, the stiffening plate is a steel plate with the same thickness as the web of the steel beam, and has ears at the connection with the tie rod to avoid collision between the connection node and the stiffening plate at the connection between the steel beam and the steel column.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) The lateral support structure of the large-span and high-section steel beam of the utility model can simultaneously constrain the upper and lower flanges of the steel beam, thereby ensuring the overall out-of-plane stability of the steel beam.

[0018] (2) The lateral support structure of the large-span and high-section steel beam of the utility model will not change the stress state of the purlins at the corner braces, and there is no need to verify and strengthen the purlins. The stress and cross-section of all purlins are uniform.

[0019] (3) The lateral support structure of the large-span and high-section steel beam of the utility model does not require fireproofing because the purlins do not participate in the stress of the main structure, which reduces the spraying of fire-retardant paint. It is beautiful, practical and economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the position relationship between the middle steel beam and the lateral support structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the position relationship between the side beam steel beam and the lateral support structure of the utility model;

[0022] Figure 3 It is a schematic diagram of a node plate of the utility model;

[0023] Figure 4 It is a schematic diagram of the stiffening plate of the utility model;

[0024] Description of main reference numerals:

[0025] 1. Steel beam; 2. Corner brace; 3. Tie rod; 4. Node plate; 5. Stiffening plate. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solution of the utility model patent. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] See attached Figure 1-4 , a lateral support structure of a large-span high-section steel beam, comprising:

[0030] A steel beam 1, whose cross section is an I-shaped beam;

[0031] The tie rod 3 has its end connected to the upper flange of the steel beam 1; a notch is provided on the tie rod 3;

[0032] The stiffening plate 5 is arranged close to the web of the steel beam 1; a lug is provided at the connection between the stiffening plate 5 and the tie rod 3;

[0033] The corner brace 2 has one end connected to the lower flange of the steel beam 1 and the other end connected to the tie rod 3 through the node plate 4; the end of the node plate 4 away from the corner brace 2 passes through the notch at the corresponding position and is welded to the tie rod 3.

[0034] In this embodiment, the corner brace 2 is made of Q235B equilateral angle steel, and the angle between it and the web of the steel beam 1 is 45°. The model of the equilateral angle steel can also be determined based on the lateral force calculation of the compression flange of the high-section steel beam 1.

[0035] A screw hole is provided on the side of the gusset plate 4 close to the corner brace 2, and the gusset plate 4 and the stiffening plate 5 are connected by bolts. The corner brace 2 is connected with the gusset plate 4 and the stiffening plate 5 by high-strength bolts, and the bolt diameter is determined according to the bolt shear calculation formula. Bolt holes need to be reserved on the gusset plate 4 and the stiffening plate 5.

[0036] The tie rod 3 is made of Q235B round steel pipe, and its end is sealed and then fixed to the ear of the stiffening plate 5 through a connecting plate and bolts. The type of the tie rod 3 can also be determined according to the slenderness ratio limit value of the secondary compression rod.

[0037] The stiffening plate 5 is a steel plate, and its thickness is the same as that of the web of the steel beam 1. The stiffening plate 5 is arranged inside the weak axis web of the steel beam 1, and is fixed to the corner brace 2 and the tie rod 3 by bolt connection.

[0038] The lateral support structure of the large-span and high-section steel beam of the utility model is connected to the rigid tie rod 3 through the corner brace 2, which ensures the stability of the large-span and high-section steel beam 1 outside the plane while reducing the amount of steel used. There is no connection between the corner brace 2 and the purlin, which will not change the force of the purlin at the connection corner brace 2. There is no need to verify and strengthen the purlin, and the safety and reliability of the structure are effectively guaranteed. The problem that such large-span and high-section steel beam 1 is prone to instability and damage outside the plane can be solved. The utility model is very practical and has good market application prospects.

[0039] It should be noted that in actual engineering applications, the cross-sectional forms of the corner braces and tie rods used in the utility model cases are not limited to this, and steel components with other cross-sectional forms may be used depending on the steel beam span, steel beam size, load size, material selection, ease of use, etc.

[0040] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A lateral support structure of a large-span and high-section steel beam, characterized in that: include: Steel beams, the cross section of which is an I-shaped beam; A tie rod, the end of which is connected to the upper flange of the steel beam; a notch is provided on the tie rod; A stiffening plate is arranged close to the web of the steel beam; a lug is provided at the connection between the stiffening plate and the tie rod; A corner brace has one end connected to the lower flange of the steel beam and the other end connected to the tie rod through a node plate; an end of the node plate away from the corner brace passes through the notch at the corresponding position and is welded to the tie rod.

2. The lateral support structure of a large-span and high-section steel beam according to claim 1, characterized in that: The corner brace is made of Q235B equilateral angle steel, and the angle between it and the web of the steel beam is 30° to 60°.

3. The lateral support structure of a large-span and high-section steel beam according to claim 2, characterized in that: The included angle between the corner brace and the web of the steel beam is 45°.

4. The lateral support structure of a large-span and high-section steel beam according to claim 1, characterized in that: A screw hole is provided on one side of the node plate close to the corner brace, and the node plate is connected to the corner brace via bolts.

5. The lateral support structure of a large-span and high-section steel beam according to claim 1, characterized in that: The tie rod is made of Q235B round steel pipe, and its end is sealed and then connected and fixed to the ear of the stiffening plate through a connecting plate and bolts.

6. The lateral support structure of a large-span and high-section steel beam according to claim 1, characterized in that: The stiffening plate is a steel plate, and its thickness is the same as that of the web of the steel beam.

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