Steel beam connection structure

Abstract

This invention discloses a steel beam connection structure, comprising: a first steel beam; a second steel beam, the extension direction of the second steel beam forming an acute angle with the extension direction of the first steel beam; and a cut-off angle steel, the cut-off angle steel comprising a first side and a second side perpendicularly connected, both the first side and the second side being connected to the web of the first steel beam, the extension direction of the second side being perpendicular to the web of the second steel beam, and the web of the second steel beam being connected to the second side. The steel beam connection structure of this invention improves the stress performance at the connection between the first and second steel beams, reduces stress concentration, and enhances the overall stability and load-bearing capacity of the steel beam connection structure. Furthermore, this connection method is applicable to situations where the included angle between the first and second steel beams is small, effectively solving the problems of difficult installation of connectors and insufficient bolt operation space caused by excessively small angles, thus improving the construction operability and convenience of the connection node.

Description

Technical Field

[0001] This invention relates to the field of steel structure technology, and in particular to a steel beam connection structure. Background Technology

[0002] In large-span steel structure buildings such as large industrial plants, commercial complexes, and stadiums, secondary beams are often arranged non-orthogonally to the main beams (i.e., the included angle is not equal to 90 degrees) due to functional or aesthetic requirements. This increases the difficulty of arrangement, especially when the included angle between the main beam and the secondary beam is small (e.g., less than 45 degrees). Due to the extremely narrow space in the joint area, connectors (such as angle steel) cannot be installed properly or there is no operating space for bolt wrenches. Secondly, the stress state is complex. The shear force at the end of the secondary beam will generate a component force perpendicular to the web of the main beam, which can easily lead to local buckling or instability of the web of the main beam. Furthermore, the stress concentration phenomenon is significant, which is detrimental to the fatigue performance of the joint. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a steel beam connection structure that improves the stress performance at the connection between the first steel beam and the second steel beam, reduces stress concentration, and thus helps to improve the connection strength between the first steel beam and the second steel beam.

[0004] According to an embodiment of the present invention, a steel beam connection structure includes: a first steel beam; a second steel beam, the extension direction of the second steel beam forming an acute angle with the extension direction of the first steel beam; and a cut-off angle steel, the cut-off angle steel including a first side and a second side perpendicularly connected, the first side and the second side being connected to the web of the first steel beam, the extension direction of the second side being perpendicular to the web of the second steel beam, and the web of the second steel beam being connected to the second side.

[0005] According to the steel beam connection structure of the present invention, by setting the second side of the cut-leg angle steel to be perpendicularly connected to the web of the second steel beam, the load of the second steel beam is smoothly transferred to the first steel beam through the shortest path. This improves the stress performance at the connection between the first and second steel beams, reduces stress concentration, makes the load transfer more uniform, and avoids the problem of excessive local stress that may occur with a single connection. This enhances the overall stability and load-bearing capacity of the steel beam connection structure. Moreover, this connection method is applicable to situations where the included angle between the first and second steel beams is small, effectively solving the problems of difficult installation of connectors and insufficient bolt operation space caused by the small included angle, and improving the construction operability and convenience of the connection node.

[0006] According to some embodiments of the present invention, in the steel beam connection structure, the length of the first side is greater than or equal to the length of the second side.

[0007] According to some embodiments of the present invention, the steel beam connection structure further includes: a connecting plate, one end of which is connected to the web of the second steel beam, and the other end of which is perpendicularly connected to the second side.

[0008] According to some embodiments of the steel beam connection structure of the present invention, the extending direction of the connecting plate is parallel to the extending direction of the web of the second steel beam.

[0009] According to some embodiments of the present invention, in a steel beam connection structure, at least a portion of the connecting plate is stacked with the web of the second steel beam.

[0010] According to some embodiments of the present invention, in a steel beam connection structure, the connecting plate is detachably connected to the second steel beam.

[0011] According to some embodiments of the present invention, the steel beam connection structure further includes: a connector, which is perpendicularly disposed through the connecting plate and the web of the second steel beam.

[0012] According to some embodiments of the steel beam connection structure of the present invention, a plurality of connectors are provided, and the plurality of connectors are spaced apart along the length direction of the connection plate.

[0013] According to some embodiments of the present invention, the steel beam connection structure further includes: a stiffening plate, the stiffening plate being disposed on the side of the web of the first steel beam away from the second steel beam.

[0014] According to some embodiments of the steel beam connection structure of the present invention, the angle between the extension direction of the second steel beam and the extension direction of the first steel beam is less than 45°.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a steel beam connection structure according to some embodiments of the present invention; Figure 2 for Figure 1 Sectional view at point AA.

[0017] Figure label: 100mm steel beam connection structure; First steel beam 10; Web of the first steel beam 11; Second steel beam 20; web of the second steel beam 21, Cut-off angle steel 30; first side 31, second side 32 Connecting plate 40; Connector 50; stiffening plate 60. Detailed Implementation

[0018] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0019] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0020] In large-span steel structure buildings such as large industrial plants, commercial complexes, and stadiums, secondary beams are often arranged in a non-orthogonal manner (i.e., the included angle is not equal to 90 degrees) to the main beams due to functional or aesthetic requirements. This increases the difficulty of arrangement. In particular, when the included angle between the main beam and the secondary beam is small, the shear force at the end of the secondary beam will generate a component force perpendicular to the web of the main beam, which can easily lead to local buckling or instability of the web of the main beam. Furthermore, the stress concentration phenomenon is significant, which is detrimental to the fatigue performance of the connection between the main beam and the secondary beam.

[0021] To address this, the present invention proposes a steel beam connection structure 100, which is described below in conjunction with the appendix. Figure 1-2 The steel beam connection structure 100 of some embodiments of the present invention is described.

[0022] like Figure 1 As shown, the steel beam connection structure 100 according to an embodiment of the present invention includes: a first steel beam 10, a second steel beam 20, and a cut-off angle steel 30.

[0023] like Figure 2As shown, the extension direction of the second steel beam 20 is at an acute angle to the extension direction of the first steel beam 10. The cut-leg angle steel 30 includes a first side 31 and a second side 32 that are vertically connected. Both the first side 31 and the second side 32 are connected to the web 11 of the first steel beam. The extension direction of the second side 32 is perpendicular to the web 21 of the second steel beam, and the web 21 of the second steel beam is connected to the second side 32.

[0024] It is understood that in this embodiment, the first steel beam 10 can serve as the main beam, and the second steel beam 20 can serve as the secondary beam. The two form an acute angle in space, for example, the angle can be set to less than 45° to meet the needs of a specific building layout. The cut-off angle steel 30 serves as a key transition component connecting the first steel beam 10 and the second steel beam 20. Its first side 31 and second side 32 are perpendicular to each other, forming an L-shaped structure. Specifically, both the first side 31 and the second side 32 are fixed to the web 11 of the first steel beam by welding or bolting. The connection areas of the two on the web 11 of the first steel beam can partially overlap or be closely adjacent to each other to ensure the stability of the connection between the cut-off angle steel 30 and the first steel beam 10.

[0025] Furthermore, the second side 32 extends outward from the first steel beam 10, and its extension direction is perpendicular to the web 21 of the second steel beam. The web 21 of the second steel beam is connected to the second side 32, so that the web 21 of the second steel beam can be connected to the second side 32 in a surface contact manner. This connection method can directly transfer the load borne by the second steel beam 20 to the first side 31 through the second side 32 of the cut-leg angle steel 30, and then distribute it to the web 11 of the first steel beam from the first side 31. This effectively shortens the force transmission path and avoids the force flow detour caused by angular deviation in the traditional connection method, thereby significantly improving the uniformity of force at the connection and reducing the risk of stress concentration.

[0026] According to an embodiment of the present invention, the steel beam connection structure 100 is configured to vertically connect the second side 32 of the cut-leg angle steel 30 to the web 21 of the second steel beam, so that the load of the second steel beam 20 is smoothly transferred to the first steel beam 10 along the shortest path. This improves the stress performance at the connection between the first steel beam 10 and the second steel beam 20, reduces stress concentration, makes the load transfer more uniform, and avoids the problem of excessive local stress that may occur with a single connection. This enhances the overall stability and load-bearing capacity of the steel beam connection structure 100. Moreover, this connection method can be applied to cases where the included angle between the first steel beam 10 and the second steel beam 20 is small, effectively solving the problems of difficult installation of connectors and insufficient bolt operation space caused by the small included angle, and improving the construction operability and convenience of the connection node.

[0027] In some embodiments, the length of the first side 31 is greater than or equal to the length of the second side 32.

[0028] Understandably, this design ensures a sufficiently large connection area between the cut-off angle steel 30 and the web 11 of the first steel beam, thereby enhancing the fixing strength and stability of the cut-off angle steel 30 on the first steel beam 10. This allows the load transmitted from the second steel beam 20 to be more reliably distributed to the web 11 of the first steel beam through the first side 31, avoiding excessive local stress due to insufficient connection area. For example, when the length of the first side 31 is 200mm, the length of the second side 32 can be set to 150mm or 200mm. The specific length can be adjusted according to parameters such as the load size of the second steel beam 20 and the thickness of the web 11 of the first steel beam in the actual project.

[0029] In some embodiments, such as Figure 2 As shown, the steel beam connection structure 100 also includes a connecting plate 40, one end of which is connected to the web 21 of the second steel beam, and the other end of which is perpendicularly connected to the second side 32.

[0030] Understandably, the connection plate 40 further optimizes the connection transition between the second steel beam 20 and the cut-off angle steel 30. Specifically, one end of the connection plate 40 is fixed to the web 21 of the second steel beam by welding or bolting, while the other end is perpendicularly connected to the second side 32 of the cut-off angle steel 30, also by welding or bolting. This design eliminates the need for the web 21 of the second steel beam to be directly connected to the second side 32 of the cut-off angle steel 30. Instead, the connection plate 40 acts as an intermediate medium, better accommodating the positional relationship between the second steel beam 20 and the cut-off angle steel 30. Especially when the thickness of the web 21 and the width of the second side 32 do not match, the connection plate 40 can adjust the connection dimensions and increase connection flexibility. Simultaneously, the connection plate 40 increases the contact area between the second steel beam 20 and the cut-off angle steel 30, further improving the smoothness of force transmission.

[0031] In some embodiments, such as Figure 2 As shown, the extending direction of the connecting plate 40 is parallel to the extending direction of the web 21 of the second steel beam.

[0032] This arrangement allows the connecting plate 40 to extend along the length of the web of the second steel beam 20, forming a unified load-bearing plane with the web 21 of the second steel beam. When the second steel beam 20 is subjected to a load, the load can be evenly transferred to the second side 32 of the cut-leg angle steel 30 along the extension direction of the connecting plate 40, avoiding additional torque caused by the directional deflection of the connecting plate 40 and ensuring the linearity and smoothness of force transmission. For example, if the web 21 of the second steel beam extends horizontally, the connecting plate 40 is also set horizontally, with its length direction consistent with the length direction of the web of the second steel beam 20, so that the two can deform together under stress, improving the overall stiffness of the connection node.

[0033] In some embodiments, such as Figure 2 As shown, at least a portion of the connecting plate 40 is stacked with the web 21 of the second steel beam.

[0034] This stacked design can be achieved by covering a portion of the connecting plate 40 onto the surface of the web 21 of the second steel beam. For example, one end of the connecting plate 40 can be stacked with the end of the web 21 of the second steel beam, and the stacking length can be set according to the connection strength requirements, with a stacking length of not less than 50 mm. The stacked portion is fixed by welding or bolting, which can significantly increase the connection strength and integrity between the two, allowing the load of the second steel beam 20 to be directly and efficiently transferred to the connecting plate 40 through the stacked area, reducing the relative deformation of the connection part, and also improving the shear resistance and stability of the connection node. Especially when subjected to large lateral loads, the stacked structure can effectively prevent the connecting plate 40 from peeling or slipping between the web 21 of the second steel beam.

[0035] In some embodiments, the connecting plate 40 is detachably connected to the second steel beam 20.

[0036] Specifically, detachable connections can be achieved through bolting or other methods. For example, bolt holes can be drilled in the overlapping area of ​​the connecting plate 40 and the web 21 of the second steel beam, and high-strength bolts can be inserted and tightened for fixation. This detachable connection method facilitates the installation, disassembly, and maintenance of the steel beam connection structure 100. When the second steel beam 20 or the connecting plate 40 is damaged, it can be replaced individually without the need for destructive dismantling of the entire connection structure, reducing maintenance costs and construction difficulty. Furthermore, during the factory prefabrication stage, the connecting plate 40 and the second steel beam 20 can be pre-assembled and transported to the site before being connected to the first steel beam 10 and the cut-off angle steel 30. This improves on-site construction efficiency and facilitates fine-tuning of the position according to actual installation requirements, ensuring connection accuracy.

[0037] In some embodiments, such as Figure 1 and Figure 2 As shown, the steel beam connection structure 100 also includes a connector 50, which is perpendicularly inserted through the connecting plate 40 and the web 21 of the second steel beam.

[0038] Specifically, high-strength bolts can be selected as connectors 50. The diameter and number of bolts need to be calculated and determined based on the load transmitted by the second steel beam 20 to ensure that the connection strength meets the design requirements. For example, when the second steel beam 20 bears a large shear force, high-strength bolts of M20 or higher can be selected and evenly distributed along the overlapping area of ​​the connecting plate 40 and the web of the second steel beam 20, so that the bolts can evenly distribute the shear force and avoid excessive stress on a single bolt, which could lead to shear failure. The vertical insertion of connectors 50 ensures that they generate a vertical clamping force on the connecting plate 40 and the web 21 of the second steel beam, making them fit tightly together, thereby effectively transmitting shear and tensile forces and ensuring the reliability of the connection.

[0039] In some embodiments, such as Figure 2 As shown, there are multiple connectors 50, which are spaced apart along the length of the connecting plate 40.

[0040] For example, when the length of the connecting plate 40 is 300mm, 4-6 connectors 50 can be evenly arranged along its length, with the spacing between adjacent connectors 50 controlled within the range of 50mm-75mm. This spacing arrangement allows the connectors 50 to be evenly distributed along the length of the connecting plate 40, thereby distributing the load transferred from the second steel beam 20 to the connecting plate 40 across multiple connectors 50, avoiding excessive local stress caused by the concentrated arrangement of connectors 50. Simultaneously, the synergistic effect of multiple connectors 50 can also improve the overall rigidity of the connection between the connecting plate 40 and the web of the second steel beam 20, preventing loosening or deformation during stress, and further ensuring the stability and reliability of force transmission.

[0041] In some embodiments, such as Figure 2 As shown, the steel beam connection structure 100 also includes a stiffening plate 60, which is disposed on the side of the web 11 of the first steel beam away from the second steel beam 20.

[0042] Understandably, the stiffening plate 60 can be made of the same steel plate as the web of the first steel beam 10. Its shape can be designed as rectangular or trapezoidal according to the size of the web 11 of the first steel beam and the stress conditions. The thickness of the stiffening plate 60 is usually not less than the thickness of the web of the first steel beam 10 to ensure that it has sufficient rigidity. The stiffening plate 60 is fixedly connected to the web 11 of the first steel beam by welding. Its height can be the same as the height of the web 11 of the first steel beam, and its length is determined according to the connection position and stress range of the cut-off angle steel 30 on the web of the first steel beam 10. Generally, it covers the connection area of ​​the first side 31 and the second side 32 of the cut-off angle steel 30 on the web of the first steel beam 10 and extends to both sides for a certain length, for example, the extension length is not less than 100mm. The stiffening plate 60 can effectively enhance the local stiffness and load-bearing capacity of the web of the first steel beam 10 in the connection area. When the second steel beam 20 transfers the load to the web of the first steel beam 10 through the cut-leg angle steel 30, the stiffening plate 60 can resist the buckling deformation of the web of the first steel beam 10 due to the large local pressure, and prevent the web of the first steel beam 10 from becoming unstable and failing, thereby further improving the safety and reliability of the entire steel beam connection structure 100.

[0043] In some embodiments, the angle between the extension direction of the second steel beam 20 and the extension direction of the first steel beam 10 is less than 45°.

[0044] Understandably, this angle limitation primarily targets small-angle non-orthogonal connection scenarios common in large-span steel structure buildings, such as angles of 15°, 30°, or 40°. When the angle is less than 45°, the load transmitted from the second steel beam 20 to the first steel beam 10 has a relatively large component perpendicular to the web of the first steel beam 10. Traditional connection methods are prone to causing instability in the web of the first steel beam 10. However, this invention, through the synergistic action of components such as the angle steel 30, connecting plate 40, and stiffening plate 60, can effectively address the stress challenges posed by such small-angle connections, ensuring structural safety of the connection node while meeting architectural layout requirements. The specific angle can be determined comprehensively based on the building's functional layout, spatial aesthetic requirements, and structural stress calculation results, but all must be controlled within a range of less than 45° to fully leverage the technical advantages of the steel beam connection structure 100 of this invention.

[0045] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A steel beam connection structure (100) characterized by, include: First steel beam (10); The second steel beam (20) extends at an acute angle to the extension direction of the first steel beam (10). The cut-limb angle steel (30) includes a first side (31) and a second side (32) that are vertically connected. Both the first side (31) and the second side (32) are connected to the web (11) of the first steel beam. The extension direction of the second side (32) is perpendicular to the web (21) of the second steel beam, and the web (21) of the second steel beam is connected to the second side (32).

2. The steel beam connection structure (100) according to claim 1, characterized in that The length of the first side (31) is greater than or equal to the length of the second side (32).

3. The steel beam connection structure (100) according to claim 2, characterized in that Also includes: A connecting plate (40) is provided, one end of which is connected to the web (21) of the second steel beam, and the other end of which is perpendicularly connected to the second side (32).

4. The steel beam connection structure (100) according to claim 3, characterized in that The extension direction of the connecting plate (40) is parallel to the extension direction of the web (21) of the second steel beam.

5. The steel beam connection structure (100) according to claim 4, characterized in that At least a portion of the connecting plate (40) is superimposed on the web (21) of the second steel beam.

6. The steel beam connection structure (100) according to claim 4, characterized in that The connecting plate (40) is detachably connected to the second steel beam (20).

7. The steel beam connection structure (100) according to claim 5, characterized in that Also includes: A connector (50) is perpendicularly inserted through the connecting plate (40) and the web plate (21) of the second steel beam.

8. The steel beam connection structure (100) according to claim 7, characterized in that, The connector (50) is provided in multiple ways, and the multiple connectors (50) are spaced apart along the length direction of the connecting plate (40).

9. The steel beam connection structure (100) according to claim 7, characterized in that, Also includes: A stiffening plate (60) is provided on the side of the web (11) of the first steel beam away from the second steel beam (20).

10. The steel beam connection structure (100) according to claim 1, characterized in that, The angle between the extension direction of the second steel beam (20) and the extension direction of the first steel beam (10) is less than 45°.

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