Node structure of unequal-height frame beams

Abstract

The utility model discloses a node structure of unequal-height frame beams, belongs to the technical field of steel structure buildings, and aims to solve the problem that stability of lower flanges of the frame beams is difficult to guarantee by angle braces when the heights of sections of the two frame beams are inconsistent in the prior art, and the node structure of the unequal-height frame beams further comprises the angle braces (4), the angle brace (4) comprises a first supporting rod (41) and a second supporting rod (42) which are connected in a crossed mode, and the first supporting rod (41) and the second supporting rod (42) are connected with the first steel frame beam (1) and the second steel frame beam (3). According to the node structure of the unequal-height frame beams, on one hand, the stability of the lower flange can be guaranteed, distortion and instability of the flanges can be well prevented, on the other hand, the stability of the upper flange can be well guaranteed, and when the bending moment is reversed under the action of an earthquake, the stability of the pressed upper flange can be guaranteed, and the anti-seismic property of the whole structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure buildings, in particular to a node structure of unequal height frame beams. Background Art

[0002] Judging from the global construction development, steel structure buildings are developing rapidly. As the main load-bearing member, steel frame beams bear negative bending moments 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. In the negative bending moment area, the lower flange is compressed, the upper flange is tensile, and the upper flange has lateral support and torsional constraints provided by the floor slab, so the negative bending moment area is prone to distortion and instability.

[0003] In seismic design, lateral supports are set on the compression flange of the frame beam as needed, and lateral supports should be set on both the upper and lower flanges of the section where plastic hinges appear. Therefore, when the upper flange of the beam is reliably connected to the floor slab, the lower flange of the fixed-end beam is set with a corner brace near 0.15 times the beam span at the beam end. This is easy to achieve for equal-height frame beams, but it is difficult to achieve connection when adding corner braces when the cross-section heights of the frame beams in two directions are inconsistent. Utility Model Content

[0004] In order to solve the problem in the above-mentioned prior art that it is difficult for the corner brace to ensure the stability of the lower flange of the frame beam when the cross-sectional heights of the two frame beams are inconsistent, the utility model provides a node structure of frame beams of unequal heights, the node structure of frame beams of unequal heights includes a corner brace, the corner brace contains a first support rod and a second support rod cross-connected, on the one hand, this corner brace structure can ensure the stability of the lower flange and prevent the flange from being deformed and unstable, on the other hand, it can also ensure the stability of the upper flange, and when the bending moment is reversed under the action of an earthquake, it can also ensure the stability of the compressed upper flange, thereby increasing the seismic performance of the overall structure.

[0005] The technical solution adopted by the embodiment of the utility model to solve the technical problem is:

[0006] A node structure of unequal height frame beams, comprising a first steel frame beam, a column and a second steel frame beam connected in sequence, the cross-sectional height of the first steel frame beam being greater than the cross-sectional height of the second steel frame beam, the first steel frame beam comprising a first upper flange plate, a first neutral plate and a first lower flange plate connected in sequence from top to bottom, the second steel frame beam comprising a second upper flange plate, a second neutral plate and a second lower flange plate connected in sequence from top to bottom, the node structure of the unequal height frame beams also comprises a corner brace, the corner brace comprising a first support rod and a second support rod cross-connected, the first support rod and the second support rod are both inclined relative to a horizontal plane, the upper end of the first support rod is connected and fixed to the first upper flange plate of the first steel frame beam through a first upper connecting plate, the lower end of the first support rod is connected and fixed to the second lower flange plate of the second steel frame beam through a first lower connecting plate, the upper end of the second support rod is connected and fixed to the second upper flange plate of the second steel frame beam through a second upper connecting plate, and the lower end of the second support rod is connected and fixed to the first lower flange plate of the first steel frame beam through a second lower connecting plate.

[0007] The first support rod and the second support rod are both angle steels. The first support rod contains a first horizontal plate and a first vertical plate connected in sequence. The second support rod contains a second horizontal plate and a second vertical plate connected in sequence. The first vertical plate and the second vertical plate are both in an upright state and are stacked and connected.

[0008] The first vertical plate and the second vertical plate are stacked and connected via an intermediate connecting plate. The overlapping portion between the first vertical plate and the second vertical plate is a parallelogram, and the area of ​​the intermediate connecting plate is larger than the area of ​​the parallelogram.

[0009] The first horizontal plate is connected to the first vertical plate up and down, the second horizontal plate is also connected to the second vertical plate up and down, the second support rod is located between the first support rod and the column, and the first vertical plate and the second vertical plate are both welded to the middle connecting plate.

[0010] The first vertical plate of the first support rod is connected to the first upper connecting plate in a stacked manner, the second vertical plate of the second support rod is connected to the second lower connecting plate in a stacked manner, and the first upper connecting plate and the second lower connecting plate are located in the same vertical plane.

[0011] The first vertical plate of the first support rod is bolted to the first upper connecting plate, the second vertical plate of the second support rod is bolted to the second lower connecting plate, the first upper connecting plate and the second lower connecting plate are both connected to the first neutral plate, and the first upper connecting plate and the second lower connecting plate are connected as a whole.

[0012] A first reinforcing rib plate is externally connected to the first neutral plate of the first steel frame beam. The first reinforcing rib plate is in an upright state and is perpendicular to the first neutral plate. The first upper connecting plate and the second lower connecting plate are both connected to the first reinforcing rib plate.

[0013] The first vertical plate of the first support rod is connected to the first lower connecting plate in a stacked manner, the second vertical plate of the second support rod is connected to the second upper connecting plate in a stacked manner, and the first lower connecting plate and the second upper connecting plate are located in the same vertical plane.

[0014] The first vertical plate of the first support rod is bolted to the first lower connecting plate, the second vertical plate of the second support rod is bolted to the second upper connecting plate, the second upper connecting plate and the first lower connecting plate are both connected to the second neutral plate, and the first lower connecting plate and the second upper connecting plate are connected as a whole.

[0015] A second reinforcing rib plate is externally connected to the second neutral plate of the second steel frame beam. The second reinforcing rib plate is in an upright state. The second reinforcing rib plate is perpendicular to the second neutral plate. The first lower connecting plate and the second upper connecting plate are both connected to the second reinforcing rib plate.

[0016] The beneficial effects of the embodiments of the utility model are:

[0017] 1. The corner brace contains a cross-connected first support rod and a second support rod, which can ensure the stability of the lower flange on the one hand and prevent the flange from being deformed and unstable. On the other hand, it can also ensure the stability of the upper flange. When the bending moment is reversed under the action of an earthquake, it can also ensure the stability of the compressed upper flange and increase the seismic performance of the overall structure.

[0018] 2. The node structure of the unequal height frame beams has a large application space in the steel frame structure with concrete floor slabs, and can also be well implemented during construction by using two cross angle steels. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] Figure 1 It is a three-dimensional schematic diagram of the node structure of the unequal height frame beams of the utility model.

[0021] Figure 2 It is a top view schematic diagram of the node structure of the unequal height frame beams of the utility model.

[0022] Figure 3 When the first upper connecting plate and the second lower connecting plate are separately arranged and the first lower connecting plate and the second upper connecting plate are also separately arranged, Figure 2 Schematic cross-sectional view along the AA direction.

[0023] Figure 4 When the first upper connecting plate and the second lower connecting plate are integrally arranged and the first lower connecting plate and the second upper connecting plate are also integrally arranged, Figure 2 Schematic cross-sectional view along the AA direction.

[0024] Figure 5 The first support rod Figure 2 Schematic cross-sectional view along the BB direction.

[0025] Figure 6 The second support rod Figure 2 Schematic cross-sectional view along the BB direction.

[0026] The following are the descriptions of the reference numerals:

[0027] 1. First steel frame beam; 2. Column; 3. Second steel frame beam; 4. Corner brace; 5. First upper connecting plate; 6. First lower connecting plate; 7. Second upper connecting plate; 8. Second lower connecting plate;

[0028] 11. first upper flange plate; 12. first neutral plate; 13. first lower flange plate; 14. first stiffener plate;

[0029] 31. second upper flange plate; 32. second neutral plate; 33. second lower flange plate; 34. second stiffener plate;

[0030] 41. first support rod; 42. second support rod; 43. middle connecting plate;

[0031] 411, first horizontal board; 412, first vertical board;

[0032] 421. The second horizontal board; 422. The second vertical board. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] like Figures 1 to 3As shown, a node structure of a frame beam of unequal height described in an embodiment of the utility model comprises a first steel frame beam 1, a column 2 and a second steel frame beam 3 connected in sequence, the cross-sectional height of the first steel frame beam 1 is greater than the cross-sectional height of the second steel frame beam 3, the first steel frame beam 1 comprises a first upper flange plate 11, a first neutral plate 12 and a first lower flange plate 13 connected in sequence from top to bottom, the second steel frame beam 3 comprises a second upper flange plate 31, a second neutral plate 32 and a second lower flange plate 33 connected in sequence from top to bottom, the node structure of the frame beam of unequal height further comprises a corner brace 4, the corner brace 4 comprises a first support cross-connected The rod 41 and the second support rod 42, the first support rod 41 and the second support rod 42 are both arranged obliquely relative to the horizontal plane, the upper end of the first support rod 41 is connected and fixed to the first upper flange plate 11 of the first steel frame beam 1 through the first upper connecting plate 5, the lower end of the first support rod 41 is connected and fixed to the second lower flange plate 33 of the second steel frame beam 3 through the first lower connecting plate 6, the upper end of the second support rod 42 is connected and fixed to the second upper flange plate 31 of the second steel frame beam 3 through the second upper connecting plate 7, and the lower end of the second support rod 42 is connected and fixed to the first lower flange plate 13 of the first steel frame beam 1 through the second lower connecting plate 8.

[0035] The extension direction of the first steel frame beam 1 is perpendicular to the extension direction of the second steel frame beam 3, the column 2 is in an upright state, the corner brace 4 contains a cross-connected first support rod 41 and a second support rod 42, the extension direction of the first support rod 41 and the extension direction of the second support rod 42 are both inclined relative to the horizontal plane, the first support rod 41 and the second support rod 42 are connected to the first steel frame beam 1 and the second steel frame beam 3, in particular, the upper end of the first support rod 41 is connected and fixed to the first upper flange plate 11 of the first steel frame beam 1 through the first upper connecting plate 5, the lower end of the first support rod 41 is connected and fixed to the second lower flange plate 33 of the second steel frame beam 3 through the first lower connecting plate 6, the upper end of the second support rod 42 is connected and fixed to the second upper flange plate 31 of the second steel frame beam 3 through the second upper connecting plate 7, and the lower end of the second support rod 42 is connected and fixed to the first lower flange plate 13 of the first steel frame beam 1 through the second lower connecting plate 8. In this way, when in use, concrete floor slabs are arranged on the first steel frame beam 1 and the second steel frame beam 3. On the one hand, this corner bracing structure can ensure the stability of the lower flanges of the first steel frame beam 1 and the second steel frame beam 3, and effectively prevent the lower flanges from being deformed and unstable. On the other hand, it can also well ensure the stability of the upper flanges of the first steel frame beam 1 and the second steel frame beam 3. When the bending moment is reversed under the action of an earthquake, the stability of the compressed upper flange can be ensured, thereby increasing the seismic performance of the overall structure.

[0036] like Figures 5 and 6As shown, the first support rod 41 and the second support rod 42 are both angle steels. The first support rod 41 contains a first horizontal plate 411 and a first vertical plate 412 connected in sequence, and the second support rod 42 contains a second horizontal plate 421 and a second vertical plate 422 connected in sequence. The first vertical plate 412 and the second vertical plate 422 are both in an upright state, and the first vertical plate 412 and the second vertical plate 422 are stacked and connected.

[0037] Preferably, the first vertical plate 412 and the second vertical plate 422 are stacked and connected by the intermediate connecting plate 43, that is, the first vertical plate 412, the intermediate connecting plate 43 and the second vertical plate 422 are stacked and connected in sequence, and the intermediate connecting plate 43 is a steel plate. The overlapping portion between the first vertical plate 412 and the second vertical plate 422 is a parallelogram, and the area of ​​the intermediate connecting plate 43 is greater than the area of ​​the parallelogram, and the intermediate connecting plate 43 is also a parallelogram.

[0038] Preferably, the first horizontal plate 411 and the first vertical plate 412 are connected vertically, the second horizontal plate 421 and the second vertical plate 422 are also connected vertically, the second horizontal plate 421 of the second support rod 42 faces the column 2, the second support rod 42 is located between the first support rod 41 and the column 2, and the first vertical plate 412 and the second vertical plate 422 are both welded to the middle connecting plate 43 by fillet welds. The length and cross-sectional area of ​​the first support rod 41 and the second support rod 42 are substantially the same.

[0039] The first upper connecting plate 5 is welded to the first upper flange plate 11 of the first steel frame beam 1, the first lower connecting plate 6 is welded to the second lower flange plate 33 of the second steel frame beam 3, the second upper connecting plate 7 is welded to the second upper flange plate 31 of the second steel frame beam 3, and the second lower connecting plate 8 is welded to the first lower flange plate 13 of the first steel frame beam 1. The first upper connecting plate 5, the first lower connecting plate 6, the second upper connecting plate 7 and the second lower connecting plate 8 are all steel plates.

[0040] The first vertical plate 412 of the first support rod 41 is connected to the first upper connecting plate 5 in a stacked manner, the second vertical plate 422 of the second support rod 42 is connected to the second lower connecting plate 8 in a stacked manner, and the first upper connecting plate 5 and the second lower connecting plate 8 are located in the same vertical plane. The first upper connecting plate 5, the second lower connecting plate 8 and the middle connecting plate 43 are all in an upright state, and the thickness of the first upper connecting plate 5, the thickness of the second lower connecting plate 8 and the thickness of the middle connecting plate 43 are the same.

[0041] The first vertical plate 412 of the first support rod 41 is connected and fixed to the first upper connecting plate 5 by high-strength bolts, and the second vertical plate 422 of the second support rod 42 is connected and fixed to the second lower connecting plate 8 by high-strength bolts. The first upper connecting plate 5 and the second lower connecting plate 8 are both connected to the first neutral plate 12 (such as by welding), and the first upper connecting plate 5 and the second lower connecting plate 8 are connected as a whole, that is, the first upper connecting plate 5 and the second lower connecting plate 8 can be a piece of steel plate, such as Figure 4 shown.

[0042] The first neutral plate 12 of the first steel frame beam 1 is externally connected with a first reinforcing rib plate 14, the first reinforcing rib plate 14 is in an upright state, the first reinforcing rib plate 14 is perpendicular to the first neutral plate 12, the first reinforcing rib plate 14 is welded to the first upper flange plate 11, the first neutral plate 12 and the first lower flange plate 13, and the first upper connecting plate 5 and the second lower connecting plate 8 are both connected to the first reinforcing rib plate 14 (such as welded).

[0043] The first vertical plate 412 of the first support rod 41 is connected to the first lower connecting plate 6 in a stacked manner, the second vertical plate 422 of the second support rod 42 is connected to the second upper connecting plate 7 in a stacked manner, and the first lower connecting plate 6 and the second upper connecting plate 7 are located in the same vertical plane. The first lower connecting plate 6, the second upper connecting plate 7 and the middle connecting plate 43 are all in an upright state, and the thickness of the first lower connecting plate 6, the thickness of the second upper connecting plate 7 and the thickness of the middle connecting plate 43 are the same.

[0044] The first vertical plate 412 of the first support rod 41 is fixedly connected to the first lower connecting plate 6 by high-strength bolts, the second vertical plate 422 of the second support rod 42 is fixedly connected to the second upper connecting plate 7 by high-strength bolts, the second upper connecting plate 7 and the first lower connecting plate 6 are both connected to the second neutral plate 32 (such as by welding), and the first lower connecting plate 6 and the second upper connecting plate 7 are connected as a whole, that is, the first lower connecting plate 6 and the second upper connecting plate 7 can be a piece of steel plate, such as Figure 4 shown.

[0045] The second neutral plate 32 of the second steel frame beam 3 is externally connected with a second reinforcing rib plate 34, the second reinforcing rib plate 34 is in an upright state, the second reinforcing rib plate 34 is perpendicular to the second neutral plate 32, the second reinforcing rib plate 34 is welded to the second upper flange plate 31, the second neutral plate 32 and the second lower flange plate 33, and the first lower connecting plate 6 and the second upper connecting plate 7 are both connected to the second reinforcing rib plate 34 (such as welded).

[0046] like Figure 1 and Figure 2 The middle connecting plate 43 is in an upright state, the angle between the plane where the middle connecting plate 43 is located and the plane where the first neutral plate 12 of the first steel frame beam 1 is α (the angle between the plane where the first upper connecting plate 5 is located and the plane where the first neutral plate 12 of the first steel frame beam 1 is also α), the angle between the plane where the middle connecting plate 43 is located and the plane where the second neutral plate 32 of the second steel frame beam 3 is β (the angle between the plane where the second upper connecting plate 7 is located and the plane where the second neutral plate 32 of the second steel frame beam 3 is β), α+β=90°, for example, α can be 45°.

[0047] Alternatively, α can also be determined based on the height difference between the first steel frame beam 1 and the second steel frame beam 3, and the determination method can be obtained by using existing technology or limited number of experiments. When determining the cross section of the corner brace 4, it should be determined comprehensively based on its length, the cross-sectional area of ​​the first upper flange plate 11 of the first steel frame beam 1, and the cross-sectional area of ​​the second upper flange plate 31 of the second steel frame beam 3, and the determination method can be obtained by using existing technology or limited number of experiments.

[0048] The material of the corner brace 4 should preferably be low-strength Q235 grade steel. Reserved bolt holes are set on the first upper connecting plate 5, the first lower connecting plate 6, the second upper connecting plate 7 and the second lower connecting plate 8, which can be connected to the corner brace 4 by high-strength bolts, or can also be connected by welding. During construction layout, the lengths of the first upper connecting plate 5, the first lower connecting plate 6, the second upper connecting plate 7 and the second lower connecting plate 8 can be appropriately adjusted according to the angles of the first upper connecting plate 5, the first lower connecting plate 6, the second upper connecting plate 7 and the second lower connecting plate 8 to facilitate construction and installation. Since the corner brace 4 is a single angle steel and is prone to instability, an intermediate connecting plate 43 is set between the two single angle steels to connect the first support rod 41 and the second support rod 42. The size of the weld is determined according to calculation needs and meets the structural requirements.

[0049] The requirements for related components in the node structure of the unequal height frame beams (or the node structure where the columns connect the unequal height frame beams) should meet the requirements of the relevant specifications for steel structure design, where the thickness of the first upper connecting plate 5, the first lower connecting plate 6, the second upper connecting plate 7 and the second lower connecting plate 8 shall not be less than 6mm, the angle steel height of the first support rod 41 and the second support rod 42 shall not be less than 63mm, the height of the related welds shall not be less than 6mm, and the high-strength bolt structure shall not be less than M16. The size of the first steel frame beam 1, the column 2, the second steel frame beam 3 and the corner brace 4 shall be determined by design; the design calculation uses structural mechanics analysis to calculate the force size, and determines its cross-sectional size based on material mechanics and steel structure design principles.

[0050] The node structure of the unequal height frame beams achieves lower flange stability by adding cross angle steels, which is quite different from the original form of adding stiffening ribs and increasing the cross-section of steel beams. It has the advantages of simple construction and economic rationality. The application scenario is that the height difference of the main frame beams in two vertically intersecting directions (that is, the difference between the cross-sectional height of the first steel frame beam 1 and the cross-sectional height of the second steel frame beam 3) is greater than 150mm, but less than or equal to 500mm, and the building is located in a steel frame structure in a high-intensity seismic fortification area.

[0051] The above is only a specific embodiment of the utility model, and it cannot be used to limit the scope of the utility model. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the utility model should still fall within the scope of the utility model. In addition, the technical features of the utility model can be freely combined with each other, with technical features and technical solutions, with technical solutions and embodiments.

Claims

1. A node structure of frame beams of unequal heights, comprising a first steel frame beam (1), a column (2) and a second steel frame beam (3) connected in sequence, wherein the cross-sectional height of the first steel frame beam (1) is greater than the cross-sectional height of the second steel frame beam (3), the first steel frame beam (1) comprises a first upper flange plate (11), a first middle plate (12) and a first lower flange plate (13) connected in sequence from top to bottom, and the second steel frame beam (3) comprises a second upper flange plate (31), a second middle plate (32) and a second lower flange plate (33) connected in sequence from top to bottom, characterized in that: The node structure of the unequal height frame beams also includes a corner brace (4), the corner brace (4) including a first support rod (41) and a second support rod (42) which are cross-connected, the first support rod (41) and the second support rod (42) being arranged obliquely relative to a horizontal plane, the upper end of the first support rod (41) being connected and fixed to the first upper flange plate (11) of the first steel frame beam (1) via a first upper connecting plate (5), the lower end of the first support rod (41) being connected and fixed to the second lower flange plate (33) of the second steel frame beam (3) via a first lower connecting plate (6), the upper end of the second support rod (42) being connected and fixed to the second upper flange plate (31) of the second steel frame beam (3) via a second upper connecting plate (7), and the lower end of the second support rod (42) being connected and fixed to the first lower flange plate (13) of the first steel frame beam (1) via a second lower connecting plate (8).

2. The node structure of the unequal height frame beam according to claim 1 is characterized in that: The first support rod (41) and the second support rod (42) are both angle steels. The first support rod (41) includes a first transverse plate (411) and a first vertical plate (412) connected in sequence. The second support rod (42) includes a second transverse plate (421) and a second vertical plate (422) connected in sequence. The first vertical plate (412) and the second vertical plate (422) are both in an upright state. The first vertical plate (412) and the second vertical plate (422) are stacked and connected.

3. The node structure of the unequal height frame beam according to claim 2 is characterized in that: The first vertical plate (412) and the second vertical plate (422) are stacked and connected via an intermediate connecting plate (43); the overlapping portion between the first vertical plate (412) and the second vertical plate (422) is a parallelogram; and the area of ​​the intermediate connecting plate (43) is greater than the area of ​​the parallelogram.

4. The node structure of the unequal height frame beam according to claim 3 is characterized in that: The first transverse plate (411) and the first vertical plate (412) are connected up and down, the second transverse plate (421) and the second vertical plate (422) are also connected up and down, the second support rod (42) is located between the first support rod (41) and the column (2), and the first vertical plate (412) and the second vertical plate (422) are both welded to the middle connecting plate (43).

5. The node structure of unequal height frame beams according to claim 2 is characterized in that: The first vertical plate (412) of the first support rod (41) is connected to the first upper connecting plate (5) in a stacked manner, the second vertical plate (422) of the second support rod (42) is connected to the second lower connecting plate (8) in a stacked manner, and the first upper connecting plate (5) and the second lower connecting plate (8) are located in the same vertical plane.

6. The node structure of the unequal height frame beams according to claim 5 is characterized in that: The first vertical plate (412) of the first support rod (41) is bolted to the first upper connecting plate (5), the second vertical plate (422) of the second support rod (42) is bolted to the second lower connecting plate (8), the first upper connecting plate (5) and the second lower connecting plate (8) are both connected to the first middle vertical plate (12), and the first upper connecting plate (5) and the second lower connecting plate (8) are connected as a whole.

7. The node structure of unequal height frame beams according to claim 6, characterized in that: The first neutral plate (12) of the first steel frame beam (1) is externally connected to a first reinforcing rib plate (14), the first reinforcing rib plate (14) is in an upright state, the first reinforcing rib plate (14) is perpendicular to the first neutral plate (12), and the first upper connecting plate (5) and the second lower connecting plate (8) are both connected to the first reinforcing rib plate (14).

8. The node structure of unequal height frame beams according to claim 2, characterized in that: The first vertical plate (412) of the first support rod (41) is connected to the first lower connecting plate (6) in a stacked manner, the second vertical plate (422) of the second support rod (42) is connected to the second upper connecting plate (7) in a stacked manner, and the first lower connecting plate (6) and the second upper connecting plate (7) are located in the same vertical plane.

9. The node structure of unequal height frame beams according to claim 8, characterized in that: The first vertical plate (412) of the first support rod (41) is bolted to the first lower connecting plate (6), the second vertical plate (422) of the second support rod (42) is bolted to the second upper connecting plate (7), the second upper connecting plate (7) and the first lower connecting plate (6) are both connected to the second neutral plate (32), and the first lower connecting plate (6) and the second upper connecting plate (7) are connected as a whole.

10. The node structure of unequal height frame beams according to claim 9, characterized in that: The second neutral plate (32) of the second steel frame beam (3) is externally connected to a second reinforcing rib plate (34), the second reinforcing rib plate (34) is in an upright state, the second reinforcing rib plate (34) is perpendicular to the second neutral plate (32), and the first lower connecting plate (6) and the second upper connecting plate (7) are both connected to the second reinforcing rib plate (34).

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