A replaceable external plate type semi-rigid energy-absorbing beam-column node

Abstract

The present invention relates to a replaceable external plate type semi-rigid energy-absorbing beam-column node, comprising: a steel column (1); a cantilever beam section (5) arranged on the side of the steel column (1); a steel beam (10) arranged on the side of the cantilever beam section (5) away from the steel column (1); a butt-joint end plate assembly arranged between the cantilever beam section (5) and the steel beam (10), comprising a first butt-joint end plate (6‑1) and a second butt-joint end plate (6‑2) fixedly connected, wherein the first butt-joint end plate (6‑1) is fixedly connected to the cantilever beam section (5), and the second butt-joint end plate (6‑2) is fixedly connected to the steel beam (10). Compared with the prior art, the present invention can effectively ensure that the cross-sections of the steel beam and the steel column are always in an elastic state, and the beam-column node has a certain bearing capacity, rigidity and energy-absorbing capacity, and further has the characteristics of being replaceable and repeatedly applicable.

Description

Technical Field

[0001] The invention relates to the technical field of earthquake-resistant building structures, and in particular to a replaceable externally connected plate-type semi-rigid energy-absorbing beam-column node. Background Art

[0002] With the rapid development of smelting technology and welding technology, the price advantage of the average unit strength of high-strength steel with strength grade Q460 and above has become increasingly obvious. Due to its comprehensive economic benefits, environmental benefits and architectural artistic effects, it is widely used in various building structures.

[0003] When high-strength steel columns are used in building structures, the design of beam-column connection nodes faces new problems. If the beam-column connection nodes are hinged nodes, the overall lateral stiffness of the structure will be significantly reduced, and the beam-column connection of the structure cannot dissipate earthquake energy well. If the beam-column connection nodes are rigidly connected, under the action of an earthquake, the column section at the beam-column connection will be subjected to a large bending moment, causing the column section to enter the yield stage, and the column section will produce a large plastic deformation, making the structure unsuitable for continued load-bearing. At the same time, such plastic deformation also brings great challenges to maintenance and reinforcement.

[0004] High-strength steel is widely used in various building structures due to its comprehensive architectural effect, economic benefits, and environmental benefits. However, high-strength steel has the disadvantage of poor ductility. Therefore, in engineering applications, we do not want the traditional beam-column rigid connection to cause the high-strength steel column to yield, nor do we want to use hinged connection to reduce the lateral stiffness of the structure. At present, there is no beam-column connection node that can better solve this problem. Summary of the invention

[0005] The purpose of the present invention is to provide a replaceable external plate type semi-rigid energy-absorbing beam-column node in order to overcome at least one of the defects of the above-mentioned prior art. The beam-column connection is between the hinge connection and the steel connection, and has a certain bearing capacity, rigidity and energy-absorbing capacity. After a moderate or severe earthquake, the external energy-absorbing plate and the bending-resistant bolts can be replaced to achieve rapid repair of the beam-column connection, thereby achieving the purpose of replaceability.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A replaceable external plate type semi-rigid energy-absorbing beam-column node, comprising:

[0008] Steel columns;

[0009] Cantilever beam section located on the side of the steel column;

[0010] A steel beam located on the side of the cantilever beam section away from the steel column;

[0011] The butt end plate assembly is arranged between the cantilever beam section and the steel beam, and comprises a first butt end plate and a second butt end plate which are fixedly connected. The first butt end plate is fixedly connected to the cantilever beam section, and the second butt end plate is fixedly connected to the steel beam.

[0012] Furthermore, high-strength bolts for fixing and connecting the first butt end plate and the second butt end plate are provided between the first butt end plate and the second butt end plate.

[0013] Furthermore, the cantilever beam section is fixedly connected to the middle part of the first butt end plate, and first external energy absorbing plates are provided at both ends of the first butt end plate; the steel beam is fixedly connected to the middle part of the second butt end plate, and second external energy absorbing plates are provided at both ends of the second butt end plate.

[0014] Furthermore, the first external energy absorbing plate and the second external energy absorbing plate are respectively fixedly connected to the first butt end plate and the second butt end plate by anti-bending bolts;

[0015] When the steel beam rotates to a certain angle relative to the cantilever beam section, the anti-bending bolts will deform and consume energy.

[0016] Furthermore, the steel column is a high-strength steel pipe column with a strength grade of Q460 or above, which can give full play to the bearing capacity of high-strength steel and reduce the influence of the bending moment of the cantilever beam section on the steel column.

[0017] Furthermore, the steel column adopts a closed section, and fine stone concrete is poured inside the steel column to improve the bearing capacity of the column.

[0018] Furthermore, a stiffening plate is provided in the steel column, and the stiffening plate is used to balance the concentrated force transmitted by the cantilever beam section.

[0019] Furthermore, a flat end plate is provided at one end of the cantilever beam section connected to the steel column, and the flat end plate is fixedly connected to the steel column by a one-way bolt.

[0020] Furthermore, the upper end of the cantilever beam section is an upper flange steel plate, and the lower end is a lower flange steel plate, and both ends of the upper flange steel plate and the lower flange steel plate are respectively welded to the flat end plate and the first butt end plate.

[0021] Furthermore, the steel beam is welded to the second butt end plate.

[0022] The principle of the present invention is as follows:

[0023] A replaceable external plate type semi-rigid energy-absorbing beam-column node adopts one-way bolts to connect the cantilever beam section with the steel column through a flat end plate, and an external energy-absorbing plate is arranged on the side of the butt end plate where the cantilever beam section is connected to the steel beam. The butt end plates are connected by high-strength bolts, and the external energy-absorbing plate is connected by anti-bending bolts.

[0024] The steel beam transfers the load to the butt end plate, and then to the column through the cantilever beam section and the flat end plate. The shear force is mainly transmitted by high-strength bolts, and part of the bending moment is transmitted to the bending bolts through the external energy-absorbing plate, and then transmitted to the steel column through the cantilever beam section.

[0025] Under a minor earthquake, all components and connections of the present invention are in an elastic state. Under a moderate or major earthquake, only the external energy-absorbing plate and the anti-bending bolts of the beam-column joint of the present invention enter plasticity to dissipate energy, and the rest of the parts are in an elastic state. After a moderate or major earthquake, the external energy-absorbing plate and the anti-bending bolts can be replaced to achieve rapid repair of the beam-column connection, achieving the purpose of replaceability and repeated applicability.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] (1) The present invention provides a replaceable external plate type semi-rigid energy-absorbing beam-column node, which can effectively ensure that the cross-section of the steel beam and steel column is always in an elastic state. The beam-column node has a certain bearing capacity, rigidity and energy-absorbing capacity, and is also replaceable and reusable. It can solve the application problems of high-strength steel components currently faced by designers, and the structural system has good seismic toughness, which is worthy of vigorous promotion and application.

[0028] (2) The present invention provides a replaceable external plate type semi-rigid energy-absorbing beam-column node, which has a certain bearing capacity, rigidity and energy-absorbing capacity, and is a semi-rigid beam-column connection. Under a small earthquake, all components and connections of the present invention are in an elastic state. Under a medium or large earthquake, only the external energy-absorbing plate and the anti-bending bolts of the beam-column node of the present invention enter the plastic state to absorb energy, and the rest of the parts are in an elastic state. After a medium or large earthquake, the external energy-absorbing plate and the anti-bending bolts can be replaced to achieve rapid repair of the beam-column connection, thereby achieving the purpose of replaceability and repeated applicability.

[0029] (3) The present invention provides a replaceable external plate-type semi-rigid energy-absorbing beam-column node, the steel column of which is a high-strength steel pipe column with a strength grade of Q460 or above. In order to give full play to the bearing capacity of high-strength steel and reduce the influence of the bending moment of the cantilever beam section on the steel column, the semi-rigid energy-absorbing beam-column node is provided.

[0030] (4) The present invention provides a replaceable external plate type semi-rigid energy-absorbing beam-column node, in which the cantilever beam section of the beam-column node is connected to the steel column through a flat end plate using a one-way bolt, and is suitable for a column with a closed section. The steel column can be internally poured with fine stone concrete to improve the bearing capacity of the column.

[0031] (5) The present invention provides a replaceable external plate type semi-rigid energy-absorbing beam-column node, in which the cantilever beam section of the beam-column node is connected to the steel column through a flat end plate using a one-way bolt, and is suitable for a column with a closed section. The external energy-absorbing plate arranged on the side of the butt end plate where the cantilever beam section is connected to the steel beam will deform and consume energy when the beam-column node is rotated to a certain angle. Moreover, the bending-resistant bolts connected to the external energy-absorbing plate will also deform and consume energy when the beam-column node is rotated to a certain angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of a replaceable external plate-type semi-rigid energy-absorbing beam-column node in the embodiment;

[0033] Figure 2 It is a schematic plan view of a replaceable external plate-type semi-rigid energy-absorbing beam-column node in the embodiment;

[0034] Figure 3 for Figure 1 AA view;

[0035] Figure 4 This is a schematic diagram of the connection of the flat end plates in the embodiment;

[0036] Figure 5 This is a schematic diagram of the connection of the butt end plates in the embodiment;

[0037] Figure 6 is a three-dimensional schematic diagram of a stiffening plate in an embodiment;

[0038] Figure 7 is a three-dimensional schematic diagram of a flat end plate in an embodiment;

[0039] Figure 8 is a three-dimensional schematic diagram of the butt-jointed end plates in the embodiment;

[0040] Fig. 9 It is a three-dimensional schematic diagram of an external energy consumption board in the embodiment;

[0041] As shown in the figure, the numbers are as follows: 1. Steel column; 2. Stiffening plate; 3. Flat end plate; 4. One-way bolt; 5. Cantilever beam section; 6. Butt-jointed end plate assembly; 6-1. First butt-jointed end plate; 6-2. Second butt-jointed end plate; 7-1. First external energy dissipation plate; 7-2. Second external energy dissipation plate; 8. High-strength bolt; 9. Anti-bending bolt; 10. Steel beam. DETAILED DESCRIPTION

[0042] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0043] A replaceable external plate type semi-rigid energy-absorbing beam-column node, comprising:

[0044] Steel column 1;

[0045] A cantilever beam section 5 provided on the side of the steel column 1;

[0046] A steel beam 10 disposed on a side of the cantilever beam section 5 away from the steel column 1;

[0047] The butt end plate assembly arranged between the cantilever beam section 5 and the steel beam 10 includes a first butt end plate 6-1 and a second butt end plate 6-2 which are fixedly connected. The first butt end plate 6-1 is fixedly connected to the cantilever beam section 5, and the second butt end plate 6-2 is fixedly connected to the steel beam 10.

[0048] In some embodiments of the present invention, a high-strength bolt 8 for fixing and connecting the first butt end plate 6-1 and the second butt end plate 6-2 is provided between the first butt end plate 6-1 and the second butt end plate 6-2.

[0049] In some embodiments of the present invention, the cantilever beam section 5 is fixedly connected to the middle part of the first butt end plate 6-1, and first external energy absorbing plates 7-1 are provided at both ends of the first butt end plate 6-1; the steel beam 10 is fixedly connected to the middle part of the second butt end plate 6-2, and second external energy absorbing plates 7-2 are provided at both ends of the second butt end plate 6-2.

[0050] In some embodiments of the present invention, the first external energy absorbing plate 7-1 and the second external energy absorbing plate 7-2 are respectively fixedly connected to the first butt end plate 6-1 and the second butt end plate 6-2 by anti-bending bolts 9;

[0051] When the steel beam 10 rotates to a certain angle relative to the cantilever beam section 5, the anti-bending bolts 9 will deform and consume energy.

[0052] In some embodiments of the present invention, the steel column 1 is a high-strength steel pipe column with a strength grade of Q460 or above, which can exert the bearing capacity of high-strength steel and reduce the influence of the bending moment of the cantilever beam section on the steel column.

[0053] In some embodiments of the present invention, the steel column 1 adopts a closed cross-section, and fine stone concrete is poured inside the steel column 1 to improve the bearing capacity of the column.

[0054] In some embodiments of the present invention, a stiffening plate 2 is provided inside the steel column 1 , and the stiffening plate 2 is used to balance the concentrated force transmitted by the cantilever beam section 5 .

[0055] In some embodiments of the present invention, a flat end plate 3 is provided at one end of the cantilever beam section 5 connected to the steel column 1 , and the flat end plate 3 is fixedly connected to the steel column 1 via a one-way bolt 4 .

[0056] In some embodiments of the present invention, the upper end of the cantilever beam section 5 is an upper flange steel plate, and the lower end is a lower flange steel plate. Both ends of the upper flange steel plate and the lower flange steel plate are respectively welded to the flat end plate 3 and the first butt end plate 6-1.

[0057] In some embodiments of the present invention, the steel beam 10 is welded to the second butt end plate 6 - 2 .

[0058] Example

[0059] like Figure 1-9 As shown, a replaceable external plate type semi-rigid energy-absorbing beam-column node includes: a steel column 1, a cantilever beam section 5 and a steel beam 10.

[0060] like Figure 4 As shown, the cantilever beam section 5 is connected to the steel column 1 through the flat end plate 3 using a one-way bolt 4.

[0061] like Figure 5 As shown, the steel beam 10 is connected to the cantilever beam section 5 through a butt end plate, an external energy dissipation plate 7, high-strength bolts 8 and anti-bending bolts 9.

[0062] like Figure 2 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown in the figure, the installation order of the various components of the beam-column joint is as follows:

[0063] S1, a steel column 1 made of high-strength steel is manufactured in a factory, and a stiffening plate 2 is welded to the steel column in the factory;

[0064] S2, the cantilever beam section 5, the butt end plate and the flat end plate 3 are manufactured in the factory, and the steel plates of the upper and lower flanges of the cantilever beam section 5 are welded to the flat end plate 3 and the first butt end plate 6-1 respectively;

[0065] S3, the steel beam 10 and the external energy dissipation plate 7 are manufactured in the factory, and the steel plates of the upper and lower flanges on the left side of the steel beam 10 are welded to the second butt end plate 6-2;

[0066] S4. After the components and beam-column node components are transported to the site, after the steel column is installed in place, the cantilever beam section 5 is connected to the steel column 1 through the flat end plate 3 using a one-way bolt 4, and the cantilever beam section 5 is connected to the steel beam 10 through the butt end plate and the external energy dissipation plate 7. The butt end plate and the external energy dissipation plate 7 are connected by setting high-strength bolts 8 and anti-bending bolts 9 respectively.

[0067] The beam-column node provided in this embodiment has certain bearing capacity, rigidity and energy dissipation capacity, and is a semi-rigid beam-column connection; under a small earthquake, all components and connections of this embodiment are in an elastic state, and under a medium or large earthquake, only the external energy dissipation plate 7 and the bending bolts 9 of the beam-column node of this embodiment enter plasticity to dissipate energy, and the rest of the parts are in an elastic state, which has good seismic toughness. After a medium or large earthquake, the external energy dissipation plate 7 and the bending bolts 9 can be replaced to achieve rapid repair of the beam-column connection, thereby achieving the purpose of replaceability.

[0068] The design method of the present invention is simple and applicable, easy to install on site, all of which are dry operation methods, and have good economic and environmental benefits.

[0069] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A replaceable external plate type semi-rigid energy-absorbing beam-column node, characterized in that: include: Steel column (1); A cantilever beam section (5) provided on the side of the steel column (1); A steel beam (10) disposed on a side of the cantilever beam section (5) away from the steel column (1); A butt end plate assembly provided between a cantilever beam section (5) and a steel beam (10), comprising a first butt end plate (6-1) and a second butt end plate (6-2) which are fixedly connected, wherein the first butt end plate (6-1) is fixedly connected to the cantilever beam section (5), and the second butt end plate (6-2) is fixedly connected to the steel beam (10); The cantilever beam section (5) is fixedly connected to the middle of the first butt end plate (6-1), and first external energy absorbing plates (7-1) are provided at both ends of the first butt end plate (6-1); the steel beam (10) is fixedly connected to the middle of the second butt end plate (6-2), and second external energy absorbing plates (7-2) are provided at both ends of the second butt end plate (6-2); The first external energy dissipation plate (7-1) and the second external energy dissipation plate (7-2) are respectively fixedly connected to the first butt end plate (6-1) and the second butt end plate (6-2) via anti-bending bolts (9); A flat end plate (3) is provided at one end of the cantilever beam section (5) connected to the steel column (1); the flat end plate (3) is fixedly connected to the steel column (1) via a one-way bolt (4).

2. The replaceable external plate type semi-rigid energy dissipation beam-column node according to claim 1 is characterized in that: A high-strength bolt (8) for fixedly connecting the first butt end plate (6-1) and the second butt end plate (6-2) is provided between the two.

3. The replaceable external plate type semi-rigid energy dissipation beam-column node according to claim 1 is characterized in that: The steel column (1) is a high-strength steel pipe column with a strength grade of Q460 or above.

4. The replaceable external plate type semi-rigid energy dissipation beam-column node according to claim 1 is characterized in that: The steel column (1) adopts a closed cross-section, and fine stone concrete is poured inside the steel column (1) to improve the bearing capacity of the column.

5. The replaceable external plate type semi-rigid energy dissipation beam-column node according to claim 1 is characterized in that: A stiffening plate (2) is provided inside the steel column (1), and the stiffening plate (2) is used to balance the concentrated force transmitted by the cantilever beam section (5).

6. The replaceable external plate type semi-rigid energy-absorbing beam-column node according to claim 1 is characterized in that: The upper end of the cantilever beam section (5) is an upper flange steel plate, and the lower end is a lower flange steel plate. Both ends of the upper flange steel plate and the lower flange steel plate are respectively welded to the flat end plate (3) and the first butt end plate (6-1).

7. The replaceable external plate type semi-rigid energy dissipation beam-column node according to claim 1 is characterized in that: The steel beam (10) is welded to the second butt-jointed end plate (6-2).

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