Steel structure beam connecting joint

Abstract

The utility model provides a steel structure beam connecting joint which comprises a first beam, a second beam, a first connecting piece and a second connecting piece. The second beam is provided with a second flange; the height of the second flange is greater than that of the first flange; the supporting table is arranged on the top surface of the first flange, and the top surface of the supporting table and the top surface of the second flange are located at the same height; and the angle brace connecting piece is connected between the top surface of the supporting table and the top surface of the second flange, so that a triangular angle brace structure is formed among the first beam, the second beam and the angle brace connecting piece. According to the utility model, the stability of the flanges of the unequal-height frame beams can be ensured, the anti-seismic property of the connecting node is improved, and the stability loss caused by the distortion of the hogging moment area is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure buildings, in particular to a steel structure beam connection node used between beams of unequal heights. Background Art

[0002] Steel has the advantages of light weight, high strength, good ductility, environmental protection, and recyclability, making steel structure one of the most widely used structural forms in various structures. Steel structure is widely used in industrial plants, public buildings, bridge projects, rail transit and other fields. Compared with traditional buildings, steel structure buildings have obvious advantages in energy conservation and emission reduction.

[0003] The steel frame beam in the steel structure building is the main load-bearing member and bears negative bending moment at the support position. When there is a concrete floor slab at the same time, measures should be taken to ensure the stability of the lower flange of the frame beam. The lower flange in the negative bending moment area is compressed, the upper flange is tensile, and the upper flange has the floor slab for lateral support and torsional constraint, which easily leads to distortion and instability in the negative bending moment area.

[0004] In seismic design, lateral supports are provided on the compression flanges of frame beams as required, and lateral supports should be provided on both the upper and lower flanges of the sections where plastic hinges appear. Therefore, when the upper flange of the frame beam is reliably connected to the floor slab, a corner brace (connection node) is provided on the lower flange of the frame beam near the beam end 0.15 times the beam span. This is easy to achieve between frame beams of equal height, but it is difficult to achieve connection when adding corner braces when the cross-sectional heights of the frame beams in two directions are inconsistent. Utility Model Content

[0005] The utility model aims to provide a steel structure beam connection node, which ensures the stability of the flanges of frame beams of unequal heights, improves the seismic performance of the connection node, and prevents the negative bending moment zone from being distorted and losing stability.

[0006] The utility model provides a steel structure beam connection node, which comprises: a first beam, wherein the first beam has a first flange; a second beam, wherein the second beam has a second flange; the height of the second flange is greater than the height of the first flange; a support platform arranged on the top surface of the first flange, wherein the top surface of the support platform and the top surface of the second flange are located at the same height; and a corner brace connector, which is connected between the top surface of the support platform and the top surface of the second flange to form a triangular corner brace structure between the first beam, the second beam and the corner brace connector.

[0007] Furthermore, the first beam and the second beam are connected to the top of the same column, the first beam and the second beam both extend in the horizontal direction, and the extension direction of the first beam and the extension direction of the second beam form a preset angle.

[0008] Furthermore, the first beam and the second beam are both I-beams; the first beam includes a first upper flange and a first lower flange located below the first upper flange and connected to the first upper flange; the second beam includes a second upper flange and a second lower flange located below the second upper flange and connected to the second upper flange; the first upper flange and the second upper flange are at the same height, the first lower flange is the first flange, and the second lower flange is the second flange.

[0009] Furthermore, the first beam is a main beam, and / or the second beam is a secondary beam.

[0010] The steel structure beam connection node described in the utility model is suitable for the connection of steel frame beams of unequal heights. By arranging a support platform on the main beam, the corner brace connector with one end connected to the second lower flange of the secondary beam is horizontally arranged, thereby avoiding inclination or bending of the corner brace connector, thereby ensuring the stability of the first lower flange of the main beam and the second lower flange of the secondary beam, improving the seismic performance of the entire steel structure, and preventing the negative bending moment zone of the lower flange from being distorted and losing stability.

[0011] In a preferred embodiment of the present invention, the support platform has a plurality of first vertical ribs and a horizontal rib, the plurality of first vertical ribs are arranged on the first lower flange of the main beam, the horizontal rib is connected to the top of the plurality of first vertical ribs, and one end of the corner brace connector is connected to the horizontal rib.

[0012] In this embodiment, a support platform is directly formed by multiple first vertical ribs and a horizontal rib that are perpendicular to each other. While strengthening the structural strength of the main beam, it can ensure that the corner brace connectors are located in the same horizontal plane. The use of ribs is easy to implement during construction and has relatively low cost.

[0013] In a preferred embodiment of the present invention, a second vertical rib is provided between the first upper flange of the main beam and the first lower flange of the main beam, and the second vertical rib passes through the horizontal rib and is arranged close to the end of the corner brace connector.

[0014] In this embodiment, a second vertical rib connecting the first upper flange and the first lower flange of the main beam is arranged at the connection position of the corner brace connector, and its length is greater than the first vertical rib; because the main beam will be subjected to the tension or pressure of the corner brace connector at the connection position of the corner brace connector, which is not along the extension direction of the main beam, so arranging a second vertical rib at this position can improve the structural strength of the main beam.

[0015] In a preferred embodiment of the present invention, a third vertical rib is provided between the second upper flange of the secondary beam and the second lower flange of the secondary beam, and the third vertical rib is provided close to the end of the corner brace connector.

[0016] In this embodiment, a third vertical rib connecting the second upper flange and the second lower flange of the secondary beam is arranged at the connection position of the corner brace connector; since the secondary beam will be subjected to the tension or pressure of the corner brace connector at the connection position of the corner brace connector, which is not along the extension direction of the secondary beam, a third vertical rib is arranged at this position to improve the structural strength of the secondary beam.

[0017] In a preferred embodiment of the present invention, a plurality of the first vertical ribs are arranged parallel to each other.

[0018] In this embodiment, a plurality of first vertical ribs arranged in parallel can ensure the consistency of stress on the main beam at the position of the support platform, thereby avoiding a reduction in the structural strength of the main beam at the position of the support platform due to stress in multiple directions.

[0019] In a preferred embodiment of the present invention, a corner brace connecting plate is respectively provided on the horizontal rib plate and the second lower flange of the secondary beam, and both ends of the corner brace connecting member are respectively connected to the two corner brace connecting plates.

[0020] In this embodiment, the separately arranged corner brace connecting plate can facilitate the connection of the corner brace connecting parts, and the corner brace connecting plate can be directly welded to the second lower flange of the horizontal rib plate and the secondary beam, thereby avoiding the need to integrally form the corresponding connection structure at the connection position, thereby simplifying the production and processing process of the horizontal rib plate and the secondary beam.

[0021] In a preferred embodiment of the present invention, the corner brace connector is an angle steel.

[0022] In this embodiment, angle steel is used as the corner brace connector, which can withstand a relatively large load compared to simple strip steel, thereby enhancing the structural strength at the connection node position.

[0023] In a preferred embodiment of the present invention, the end of the angle steel is connected to the corner brace connecting plate by bolts, and the nominal diameter of the bolts is greater than or equal to 16 mm.

[0024] In this embodiment, connection by bolts is relatively convenient, and the limitation of the nominal diameter of the bolts can ensure the stability of the connection structure and avoid the bolts from breaking.

[0025] In a preferred embodiment of the present invention, the gap formed between the end of the angle steel and the corner brace connecting plate is welded by a fillet weld.

[0026] In this embodiment, on the basis of the bolt connection, the gap between the corner brace connecting plate and the angle steel is welded as needed, thereby enhancing the connection strength between the two and preventing the bolts from loosening.

[0027] In a preferred embodiment of the present invention, the angle steel is made of Q235 steel.

[0028] In this embodiment, the corner brace connector preferably uses carbon structural steel with a grade of Q235. Q235 steel has the characteristics of high strength, high hardness, easy forming and high fatigue resistance. In addition, its cost is relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0030] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the steel structure beam connection node of the utility model;

[0032] Figure 2 It is another three-dimensional structural schematic diagram of the steel structure beam connection node of the utility model;

[0033] Figure 3 It is a schematic diagram of a top view of another embodiment of the steel structure beam connection node of the utility model;

[0034] Figure 4 for Figure 3 AA-directed view in the middle;

[0035] Figure 5 for Figure 3 BB's forward view.

[0036] Description of reference numerals:

[0037] 10. Pillar;

[0038] 20. Main beam; 21. First upper flange; 22. First middle plate; 23. First lower flange; 24. Second vertical rib;

[0039] 30. Second beam; 31. Second upper flange; 32. Second middle plate; 33. Second lower flange; 34. Third vertical rib;

[0040] 40. Support platform; 41. First vertical rib; 42. Horizontal rib;

[0041] 50. Corner brace connector; 51. Corner brace connecting plate; 52. Bolt. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0043] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0045] like Figures 1 to 5 As shown, the utility model provides a steel structure beam connection node, which includes: a first beam, the first beam having a first flange; a second beam, the second beam having a second flange; the height of the second flange is greater than the height of the first flange; a support platform 40 arranged on the top surface of the first flange, the top surface of the support platform 40 and the top surface of the second flange are located at the same height; a corner brace connector 50, connected between the top surface of the support platform 40 and the top surface of the second flange to form a triangular corner brace structure between the first beam, the second beam and the corner brace connector 50.

[0046] The steel structure beam connection node described in the utility model is suitable for connecting steel frame beams of unequal heights. By arranging a support platform 40 on the first flange of the first beam and horizontally arranging a corner brace connector 50 with one end connected to the second flange of the second beam, the inclination or bending of the corner brace connector 50 is avoided, thereby ensuring the stability of the first flange of the first beam and the second flange of the second beam, improving the seismic performance of the entire steel structure, and preventing the negative bending moment zone on the flange from being distorted and losing stability.

[0047] The detailed structure of each component of the steel structure beam connection node described in the utility model and the connection relationship between them will be described in detail below.

[0048] It should be noted that, in this embodiment, the main beam 20 is the first beam, the secondary beam 30 is the second beam, the first lower flange 23 of the main beam 20 is the first flange, and the second lower flange 33 of the secondary beam 30 is the second flange.

[0049] First, regarding the steel frame structure, that is, the columns 10, main beams 20 and secondary beams 30 in the utility model. In conventional steel structure buildings, the internal skeleton of the building is usually composed of a plurality of columns 10 arranged in the vertical direction and a plurality of horizontal steel beams connected between the plurality of columns 10 and extending in the horizontal direction. Among them, the column 10 can be a concrete column 10 cast by reinforced concrete, or it can be a steel column with one end buried underground; the plurality of horizontal steel beams connected between the columns 10 can be I-beams. When the column 10 is a reinforced concrete structure, in order to ensure the stability of the connection structure, the end of the horizontal steel beam can be cast in the column 10; when the column 10 is a steel column, the end of the horizontal steel beam is welded to the top of the steel column.

[0050] Since there are differences in the load-bearing capacity of horizontal steel beams in different directions, in order to ensure the strength of steel structure buildings and reduce costs, horizontal steel beams are usually divided into main beams 20 and secondary beams 30, and two horizontal steel beams with different cross-sectional sizes are arranged at different load-bearing positions; of course, more horizontal steel beams of different sizes can be arranged according to the actual load-bearing needs. This embodiment only takes the main beams 20 and secondary beams 30 with different cross-sectional sizes as examples for explanation, and both the main beams 20 and the secondary beams 30 are made of I-beams.

[0051] Specifically, Figure 1 and Figure 2 As shown, a main beam 20 and a secondary beam 30 perpendicular to each other are connected to the same column 10; in other embodiments of the utility model, the number of main beams 20 and secondary beams 30 connected to the same column 10 can be multiple, and the angle between the main beam 20 and the secondary beam 30 is not necessarily 90 degrees. The number of main beams 20 and secondary beams 30 connected to a column 10 and the angle between them need to be designed according to the strength requirements of the steel structure building.

[0052] In this embodiment, one end of a main beam 20 made of I-beam is connected to the top of the column 10, and its length direction extends in the horizontal direction. The main beam 20 includes a first upper flange 21 and a first lower flange 23 that are arranged opposite to each other up and down, and a first middle plate 22 connected between the first upper flange 21 and the first lower flange 23; one end of a secondary beam 30 made of I-beam is also connected to the top of the column 10, and its length direction extends in the horizontal direction. The secondary beam 30 includes a second upper flange 31 and a second lower flange 33 that are arranged opposite to each other up and down, and a second middle plate 32 connected between the second upper flange 31 and the second lower flange 33; the I-beams used in the main beam 20 and the secondary beam 30 are commonly used steel beams in steel structure buildings, and their structure and materials are not further described here.

[0053] Furthermore, in order to set up a concrete slab or other structure on the upper part of the horizontal steel beam (main beam 20 and secondary beam 30), the first upper flange 21 of the main beam 20 and the second upper flange 31 of the secondary beam 30 are usually required to be flush (located in the same horizontal plane or at the same height). Since the cross-sectional size of the main beam 20 is larger than that of the secondary beam 30, there will be a certain height difference between the first lower flange 23 of the main beam 20 and the second lower flange 33 of the secondary beam 30, that is, the height of the first lower flange 23 of the main beam 20 is lower than the height of the second lower flange 33 of the secondary beam 30. In actual engineering, the above height difference is usually between 150mm and 500mm.

[0054] In this embodiment, the columns 10, main beams 20 and secondary beams 30 are all key load-bearing components in the steel structure building. During the actual construction process, structural mechanics analysis is required to calculate the force magnitude, and their cross-sectional sizes are determined based on material mechanics and steel structure design principles. Their cross-sectional sizes are not limited here.

[0055] Secondly, regarding the corner brace connection structure between the main beam 20 and the secondary beam 30, that is, the support platform 40 and the corner brace connection member 50 described in the utility model. The first lower flange 23 of the main beam 20 and the second lower flange 33 of the secondary beam 30 need to withstand a certain negative bending moment near the column 10. In order to avoid deformation in the negative bending moment area, a corner brace connection structure needs to be set between the first lower flange 23 of the main beam 20 and the second lower flange 33 of the secondary beam 30; the commonly used corner brace method in the prior art is: connecting a strip steel between the first lower flange 23 of the main beam 20 and the second lower flange 33 of the secondary beam 30; however, the first lower flange 23 of the main beam 20 and the second lower flange 33 of the secondary beam 30 are not at the same height, which leads to the need to bend or tilt the strip steel, thereby reducing the strength of the corner brace structure.

[0056] The utility model arranges a corresponding support platform 40 on the first lower flange 23 of the main beam 20, so that the top surface of the support platform 40 and the upper surface of the second lower flange 33 of the secondary beam 30 are located on the same horizontal plane, and the corner brace connector 50 originally connected to the first lower flange 23 of the main beam 20 at one end is connected to the support platform 40, thereby avoiding bending or tilting of the corner brace connector 50, ensuring its structural strength, and enhancing the bending resistance and seismic resistance of the steel structure beam connection node.

[0057] Specifically, Figures 1 to 3 As shown, the support platform 40 is arranged on the upper side of the first lower flange 23 of the main beam 20, that is, the support platform 40 is arranged between the first upper flange 21 and the first lower flange 23 of the main beam 20, and the support platform 40 is arranged in the negative bending moment area of ​​the first lower flange 23 of the main beam 20; specifically, the distance between the position of the support platform 40 and the column 10 is about 0.15 times the length of the main beam 20, that is, the distance between the connection position of one end of the corner brace connector 50 on the main beam 20 and the column 10 is about 0.15 times the length of the main beam 20. The support platform 40 can be welded by a plurality of steel plates, which are directly welded to the first lower flange 23 of the main beam 20; the support platform 40 can also adopt other structural forms, as long as a connection surface flush with the second lower flange 33 of the secondary beam 30 can be formed on the first lower flange 23 of the main beam 20 for the corner brace connector 50 to connect.

[0058] like Figure 1 As shown, it is shown that a corresponding support platform 40 is provided on one side of the first lower flange 23 of the main beam 20 close to the secondary beam 30, that is, a corresponding support platform 40 is provided on one side of the first middle plate 22 of the main beam 20; in order to make the structure of the main beam 20 symmetrical and ensure its structural strength, a similar support platform 40 is also provided on the other side of the first middle plate 22 of the main beam 20 ( Figure 1 and Figure 2 (not shown), that is, two symmetrical support platforms 40 are provided on both sides of the first middle plate 22 of the main beam 20.

[0059] Furthermore, the corner brace connector 50 can be a strip steel member or other strip-shaped member; one end of the corner brace connector 50 is connected to the top surface of the support platform 40 on the side of the first middle plate 22 of the main beam 20 close to the secondary beam 30, and the other end of the corner brace connector 50 is connected to the second lower flange 33 of the secondary beam 30, and the connection position is located in the negative bending moment area on the second lower flange 33 of the secondary beam 30; specifically, the distance between the connection position of the corner brace connector 50 on the secondary beam 30 and the column 10 is about 0.15 times the length of the secondary beam 30. The connection method between the corner brace connector 50 and the support platform 40 and the second lower flange 33 of the secondary beam 30 can be bolted, welded or clamped, etc., as long as the firmness of the end connection structure of the corner brace connector 50 can be guaranteed.

[0060] The two ends of the corner brace connector 50 described in the utility model are respectively connected to the support platform 40 and the second lower flange 33 of the secondary beam 30 located in the same horizontal plane. The corner brace connector 50 does not need to be bent or tilted, and can better play the role of reinforcing the node, especially when the cross-sectional height difference between the main beam 20 and the secondary beam 30 is large.

[0061] The structure and connection relationship of the preferred implementation of the steel structure beam connection node of the utility model will be further described below.

[0062] According to one embodiment of the present utility model, Figures 3 to 5 As shown, the support platform 40 has a plurality of first vertical ribs 41 and a horizontal rib 42. The plurality of first vertical ribs 41 are arranged on the first lower flange 23 of the main beam 20. The horizontal rib 42 is connected to the top of the plurality of first vertical ribs 41. One end of the corner brace connector 50 is connected to the horizontal rib 42.

[0063] The support platform 40 is composed of a plurality of mutually perpendicular first vertical ribs 41 and a horizontal rib 42. While strengthening the structural strength of the main beam 20, it can ensure that the corner brace connector 50 is located in the same horizontal plane. The use of ribs is easy to implement during construction and has relatively low cost.

[0064] Specifically, Figure 4 and Figure 5 As shown, the first vertical rib 41 is a square steel plate, which is arranged in the vertical direction, with its bottom side welded to the upper side of the first lower flange 23 of the main beam 20, its inner side welded to the first middle plate 22 of the main beam 20, and its outer side flush with the side of the first lower flange 23 of the main beam 20 (located in the same plane); the height of the first vertical rib 41 needs to be set according to the height difference between the first lower flange 23 of the main beam 20 and the second lower flange 33 of the secondary beam 30.

[0065] Preferably, multiple first vertical ribs 41 are arranged parallel to each other; the multiple first vertical ribs 41 arranged in parallel can ensure the consistency of the stress on the main beam 20 at the position of the support platform 40, and avoid multi-directional stress causing the structural strength of the main beam 20 at the position of the support platform 40 to be reduced.

[0066] In this embodiment, two parallel first vertical ribs 41 are disposed on the first lower flange 23 of the main beam 20 , and the two first vertical ribs 41 are perpendicular to the first lower flange 23 of the main beam 20 and the first middle plate 22 .

[0067] The horizontal rib 42 is also a square steel plate, arranged in the horizontal direction, and its lower end surface is welded to the top side surface of the plurality of first vertical ribs 41, and the inner side surface of the horizontal rib 42 is welded to the first middle plate 22 of the main beam 20, and its outer side surface is flush with the side edge of the first lower flange 23 of the main beam 20, that is, flush with the outer side surfaces of the plurality of first vertical ribs 41; the plurality of first vertical ribs 41 can ensure the stability of the horizontal rib 42. According to the setting height of the first vertical rib 41, the horizontal rib 42 and the second lower flange 33 of the secondary beam 30 are located in the same horizontal plane.

[0068] In this embodiment, the horizontal rib 42 is parallel to the first lower flange 23 of the main beam 20 and perpendicular to the first middle plate 22 of the main beam 20 .

[0069] Preferably, the thickness of the first vertical rib 41 and the thickness of the horizontal rib 42 are not less than 6 mm.

[0070] According to one embodiment of the present utility model, Figures 3 to 5 As shown, the first upper flange 21 of the main beam 20

[0071] A second vertical rib 24 is provided between the first lower flange 23 of the main beam 20 . The second vertical rib 24 passes through the horizontal rib 42 and is provided close to the end of the corner brace connector 50 .

[0072] A second vertical rib 24 connecting the first upper flange 21 and the first lower flange 23 of the main beam 20 is arranged at the connection position of the corner brace connector 50, and its length is greater than the first vertical rib 41. Since the main beam 20 will be subjected to the tension or pressure of the corner brace connector 50 at the connection position of the corner brace connector 50, which is not along the extension direction of the main beam 20, a second vertical rib 24 is arranged at this position to improve the structural strength of the main beam 20.

[0073] Specifically, Figure 4 and Figure 5 As shown, the second vertical rib 24 is a square steel plate, arranged in the vertical direction, with its bottom side welded to the upper side of the first lower flange 23 of the main beam 20, its top side welded to the lower side of the first upper flange 21 of the main beam 20, its inner side welded to the first middle plate 22 of the main beam 20, and its outer side flush with the side edge of the first lower flange 23 of the main beam 20. The second vertical rib 24 is arranged on the main beam 20 close to the connection position of the corner brace connector 50 on the main beam 20. Since the corner brace connector 50 is connected to the horizontal rib 42, the second vertical rib 24 passes through the horizontal rib 42.

[0074] As described above, symmetrical support platforms 40 are provided on both sides of the first middle plate 22 of the main beam 20, so the first vertical ribs 41, horizontal ribs 42 and second vertical ribs 24 are provided on both sides of the first middle plate 22 of the main beam 20 ( Figure 1 and Figure 2 (not shown).

[0075] According to one embodiment of the present utility model, Figures 3 to 5 As shown, a third vertical rib 34 is provided between the second upper flange 31 of the secondary beam 30 and the second lower flange 33 of the secondary beam 30 , and the third vertical rib 34 is provided close to the end of the corner brace connector 50 .

[0076] A third vertical rib 34 connecting the second upper flange 31 and the second lower flange 33 of the secondary beam 30 is arranged at the connection position of the corner bracing connector 50. Since the secondary beam 30 is subjected to the tension or pressure of the corner bracing connector 50 at the connection position of the corner bracing connector 50, which is not along the extension direction of the secondary beam 30, a third vertical rib 34 is arranged at this position to improve the structural strength of the secondary beam 30.

[0077] Specifically, Figure 3 and Figure 4 As shown, the third vertical rib 34 is a square steel plate, arranged in the vertical direction, with its bottom side welded to the upper side of the second lower flange 33 of the secondary beam 30, its top side welded to the lower side of the second upper flange 31 of the secondary beam 30, its inner side welded to the second middle plate 32 of the secondary beam 30, and its outer side flush with the side edge of the second lower flange 33 of the secondary beam 30. The third vertical rib 34 is arranged on the secondary beam 30 close to the connection position of the corner brace connector 50 on the secondary beam 30.

[0078] According to one embodiment of the present utility model, Figures 1 to 3 As shown, a corner brace connecting plate 51 is respectively provided on the horizontal rib 42 and the second lower flange 33 of the secondary beam 30 , one end of the corner brace connecting member 50 is connected to the corner brace connecting plate 51 on the horizontal rib 42 , and the other end thereof is connected to the corner brace connecting plate on the second lower flange 33 .

[0079] The separately arranged corner brace connecting plate 51 can facilitate the connection of the corner brace connecting piece 50. The corner brace connecting plate 51 can be directly welded to the horizontal rib plate 42 and the second lower flange 33 of the secondary beam 30, thereby avoiding the need to integrally form the corresponding connecting structure at the connecting position, thereby simplifying the production and processing process of the horizontal rib plate 42 and the secondary beam 30.

[0080] According to an embodiment of the present invention, the corner brace connector 50 is an angle steel. Compared with simple strip steel, the angle steel can withstand a relatively large load, thereby enhancing the structural strength at the connection node position.

[0081] The cross-sectional dimensions of the angle steel should be determined based on its length and the cross-sectional dimensions of the horizontal steel beams (main beam 20 and secondary beam 30); preferably, the cross-sectional side length of the angle steel is not less than 63 mm.

[0082] Preferably, the angle steel is made of Q235 steel. The corner brace connector 50 preferably uses carbon structural steel with a grade of Q235, which has the characteristics of high strength, high hardness, easy to form and high fatigue resistance, and its cost is relatively low.

[0083] According to one embodiment of the present utility model, Figure 4 As shown, the end of the angle steel is connected to the corner brace connecting plate 51 by bolts 52, and the nominal diameter of the bolts 52 is greater than or equal to 16 mm. Connection by bolts 52 is relatively convenient and has low cost; the limitation of the nominal diameter of the bolts 52 can ensure the stability of the connection structure and prevent the bolts 52 from breaking.

[0084] According to an embodiment of the present invention, the gap formed between the end of the angle steel and the corner brace connecting plate 51 is welded by a fillet weld. On the basis of the connection of the bolts 52, the gap between the corner brace connecting plate 51 and the angle steel is welded as needed to enhance the connection strength between the two and prevent the bolts 52 from loosening. Preferably, the weld leg size of the fillet weld is not less than 6 mm.

[0085] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A steel structure beam connection node, characterized in that: include: a first beam having a first flange; a second beam, the second beam having a second flange; the height of the second flange being greater than the height of the first flange; A support platform is disposed on the top surface of the first flange, wherein the top surface of the support platform and the top surface of the second flange are located at the same height; A corner brace connector is connected between the top surface of the support platform and the top surface of the second flange to form a triangular corner brace structure between the first beam, the second beam and the corner brace connector.

2. The steel structure beam connection node according to claim 1, characterized in that: The first beam and the second beam are connected to the top of the same column, the first beam and the second beam both extend in the horizontal direction, and the extension direction of the first beam and the extension direction of the second beam form a preset angle.

3. The steel structure beam connection node according to claim 1 or 2, characterized in that: The first beam and the second beam are both I-beams; The first beam comprises a first upper flange and a first lower flange located below the first upper flange and connected to the first upper flange; The second beam comprises a second upper flange and a second lower flange located below the second upper flange and connected to the second upper flange; The first upper flange and the second upper flange are located at the same height, the first lower flange is the first flange, and the second lower flange is the second flange.

4. The steel structure beam connection node according to claim 3, characterized in that: The first beam is a main beam, and / or the second beam is a secondary beam.

5. The steel structure beam connection node according to claim 4, characterized in that: The support platform has a plurality of first vertical ribs and a horizontal rib, the plurality of first vertical ribs are arranged on the first lower flange of the main beam, the horizontal rib is connected to the top of the plurality of first vertical ribs, and one end of the corner brace connector is connected to the horizontal rib.

6. The steel structure beam connection node according to claim 5, characterized in that: A second vertical rib is provided between the first upper flange of the main beam and the first lower flange of the main beam, and the second vertical rib passes through the horizontal rib and is arranged close to the end of the corner brace connector.

7. The steel structure beam connection node according to claim 4, characterized in that: A third vertical rib is provided between the second upper flange of the secondary beam and the second lower flange of the secondary beam, and the third vertical rib is provided close to the end of the corner brace connector.

8. The steel structure beam connection node according to claim 5, characterized in that: The plurality of first vertical ribs are arranged parallel to each other.

9. The steel structure beam connection node according to claim 5, characterized in that: A corner brace connecting plate is respectively provided on the horizontal rib plate and the second lower flange of the secondary beam, and two ends of the corner brace connecting member are respectively connected to the two corner brace connecting plates.

10. The steel structure beam connection node according to claim 1, characterized in that: The corner brace connector is an angle steel.

11. The steel structure beam connection node according to claim 10, characterized in that: The end of the angle steel is connected to the corner brace connecting plate by bolts, and the nominal diameter of the bolts is greater than or equal to 16 mm.

12. The steel structure beam connection node according to claim 11, characterized in that: The gap formed between the end of the angle steel and the corner brace connecting plate is welded by a fillet weld.

13. The steel structure beam connection node according to claim 10, characterized in that: The angle steel is made of Q235 steel.

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