CN116005796A - Semi-rigid steel frame beam column node based on buckling-restrained angle steel - Google Patents
Semi-rigid steel frame beam column node based on buckling-restrained angle steel Download PDFInfo
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- CN116005796A CN116005796A CN202310048606.1A CN202310048606A CN116005796A CN 116005796 A CN116005796 A CN 116005796A CN 202310048606 A CN202310048606 A CN 202310048606A CN 116005796 A CN116005796 A CN 116005796A
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Abstract
The invention discloses a semi-rigid steel frame beam column node based on buckling-restrained angle steel, which has the advantages of simple structure, clear stress, convenient design and the like compared with a common angle steel and T-plate connecting node. The four-dog-bone angle steel is arranged around the beam web in a pasting mode, the impact on the floor is small, the shearing plate is connected with the beam web through round holes and slotted holes, the shearing plate bears shearing force at the moment, the dog-bone angle steel bears bending moment, plastic deformation of the node is concentrated in a weakening section of the dog-bone angle steel when an earthquake occurs, the beam and the column are in an elastic state, and only damaged angle steel needs to be replaced after the earthquake is finished.
Description
Technical Field
The invention relates to a semi-rigid steel frame beam column node based on buckling-restrained angle steel, and belongs to the technical field of structural energy dissipation and shock absorption of civil engineering.
Background
Building seismic performance research is a constantly focused problem in civil engineering, where the arrangement of beam-column joints directly affects structural seismic performance. For many years, beam column joints can be roughly divided into a hinged joint, a semi-rigid joint and a rigid joint, wherein the semi-rigid joint has bending moment bearing capacity and rotation capacity between the hinged joint and the rigid joint, has certain energy consumption capacity and deformation capacity, meets the design concept of elasticity of a beam column main body, and only needs to replace damaged connecting members after an earthquake, thereby being fit with the development trend of the current assembled steel structure. Typical semi-rigid node connection modes comprise top and bottom angle steel connection, end plate connection and the like, however, the mechanics principle of the semi-rigid nodes is complex, and a designer is difficult to accurately estimate the bearing capacity and the energy consumption capacity of the semi-rigid nodes, so that inconvenience is brought to earthquake-resistant design.
The invention provides a semi-rigid steel frame beam column node based on buckling-restrained angle steel, which is characterized in that the buckling-restrained angle steel and a beam flange provide lateral constraint for a weakened section of a dog-bone-shaped angle steel, the buckling of the dog-bone-shaped angle steel is effectively prevented, and two shear plates are connected with a beam web through bolts to provide transverse and vertical shear rigidity. The node dog-bone angle steel bears bending moment, the shear plate bears shearing force, the stress is clear, the cross section area and the length of the corresponding dog-bone angle steel weakened section can be designed according to different design concepts, meanwhile, the axial force shearing bending moment acting on the beam column can be calculated, and the rigidity and the strength mechanical property of the node are simple and clear. The dog bone angle steel, the buckling-restrained angle steel and the cushion block are all arranged on the inner side of the beam flange, so that the influence on the building space and the floor slab is reduced. The node is assembled by the full bolts, is convenient to install and detach, and is in an elastic state, and only damaged dog-bone angle steel needs to be replaced after an earthquake is ended.
Disclosure of Invention
(1) Technical problem to be solved
In order to solve the problem that the traditional semi-rigid node mechanics principle is complex, the invention provides a semi-rigid steel frame beam column node based on buckling-restrained angle steel, which can ensure the ductility and efficiency capability of the structure and reduce the damage of an earthquake to a main structure. The key stress component of the node is the dog-bone angle steel with a weakening section, and the buckling-restrained angle steel and the beam flange provide lateral constraint, so that buckling of the dog-bone angle steel is effectively prevented when the dog-bone angle steel is pressed. When an earthquake occurs, the dog-bone angle steel bears bending moment, the shear plates bear shearing force, plastic deformation is concentrated on the weakening section of the dog-bone angle steel, the beams and the columns are in an elastic state, and only the damaged dog-bone angle steel needs to be replaced after the earthquake is finished. The node has simple structure, clear stress and convenient design, and the strength, the rigidity and the deformability of the node can be determined by the cross section area and the length of the weakened section of the dog-bone-shaped angle steel.
(2) Technical proposal
In order to solve the above problems, the present invention provides a semi-rigid steel frame beam column node based on buckling-restrained angle steel, comprising: the joint comprises a column, a beam, dog bone angle steel, a shear plate, buckling-restrained angle steel, a cushion block, a connecting plate, stiffening ribs and bolts, wherein no welding exists between the joint beam 2 and the column 1. The shear plate 4 is welded at the flange of the column 1, the connecting plate 7 is welded with the two dog-bone angle steels 3, the centers of the two dog-bone angle steels are at the same point, and the stress is ensured to be even. The connecting plate 7 is connected with the bolt hole 10 of the column 1 through a bolt hole 22, and the bolt hole 16 processed at the end part of the dog bone-shaped angle steel 3 is connected with the first bolt hole 14 at the flange of the beam 2 through bolts. The buckling preventing angle steel 5 is connected with the flange second bolt hole 13 of the beam 2 through the second bolt hole 24 and the first bolt hole 18 of the cushion block 6, the buckling preventing angle steel 5 is connected with the web bolt hole 25 of the beam 2 through the first bolt hole 17 and the second bolt hole 26 of the cushion block 6, and the gasket 23 is arranged between the buckling preventing angle steel 5 and the cushion block 6. The shear plate 4 is connected with the third bolt hole 12 of the web plate of the beam 2 through bolts, and round holes 19 and slotted holes 20 and 21 are machined in the shear plate 4. The slot 20 bears the vertical shearing force, the slot 21 shares the transverse shearing force, and the node is allowed to rotate by taking the round hole 19 of the shearing plate 4 as the rotation center while resisting shearing. In order to ensure the mechanical property of the node area, stiffening ribs 8 are welded at the joint of the column 1 and the connecting plate 7. The end of the beam 2 is processed into a trapezoid 11 to prevent collision when the node of the beam 2 and the column 1 rotates. The dog bone angle 3 is provided with a weakened section 15.
The invention provides a semi-rigid steel frame beam column node based on buckling-restrained angle steel, which is characterized in that compared with a common angle steel and T-plate connecting node, the node has the advantages of simple structure, clear stress, convenience in design and the like. The four-dog-bone angle steel is arranged around the beam web in a pasting mode, the impact on the floor is small, the shearing plate is connected with the beam web through round holes and slotted holes, the shearing plate bears shearing force at the moment, the dog-bone angle steel bears bending moment, plastic deformation of the node is concentrated in a weakening section of the dog-bone angle steel when an earthquake occurs, the beam and the column are in an elastic state, and only damaged angle steel needs to be replaced after the earthquake is finished.
The invention has the beneficial effects that: 1. the invention has simple and clear mechanics principle, is convenient to design, and the rigidity and the strength of the node are determined by the length and the sectional area of the weakened section of the dog-bone-shaped angle steel. 2. The buckling-preventing angle steel and the beam flange are restrained together, so that the dog-bone angle steel can be prevented from buckling when being pressed, and has stable pressed performance and full hysteresis. 3. The dog bone angle steel and the buckling-restrained angle steel are both arranged on the inner side of the beam flange, so that the influence on the building space and the floor slab is reduced. 4. And a cushion block and a gasket are arranged between the dog-bone-shaped angle steel and the buckling-restrained angle steel, so that the function of screwing the bolt is achieved, and the size of a gap between the weakening section of the dog-bone-shaped angle steel and the buckling-restrained angle steel can be controlled by adjusting the height of the gasket. 5. The round holes and the slotted holes are formed in the shear plates, so that the shear plate bolts are enabled to allow the nodes to rotate while shearing resistance is achieved, and plastic damage at the joint of the shear plates and the beam web is avoided. 6. The beam end is processed into a trapezoid shape, so that collision of the beam and the column during node rotation is avoided. 7. When an earthquake occurs, plastic deformation is concentrated on the weakened sections of the dog-bone angle steel, the beams and the columns are in an elastic state, and only the damaged dog-bone angle steel needs to be replaced after the earthquake is finished. 8. The full bolt is assembled, and is convenient to install and disassemble.
Drawings
In order to more clearly describe the technical means of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and the detailed description.
Fig. 1 is a node assembly schematic.
Fig. 2 is a schematic column diagram.
Fig. 3 is a schematic view of a beam.
Fig. 4 is a schematic view of a dog bone angle.
Fig. 5 is a schematic view of a buckling restrained angle, spacer and gasket.
FIG. 6 is a schematic view of a shear plate.
Fig. 7 is a schematic view of a connection plate.
In the figure: 1. a column; 2. a beam; 3. dog bone angle steel; 4. a shear plate; 5. buckling-preventing angle steel; 6. a cushion block; 7. a connecting plate; 8. stiffening ribs; 9. a bolt; 10. column flange bolt holes; 11. liang Tixing port; 12. a web third bolt hole; 13. a beam flange second bolt hole; 14. a beam flange first bolt hole; 15. a dog bone angle steel weakening section; 16. dog bone type angle steel end bolt hole; 17. buckling-preventing angle steel first bolt holes; 18. a cushion block first bolt hole; 19. round holes of the shear plates; 20. vertical slotted holes of the shear plates; 21. a shear plate transverse slot; 22. connecting plate bolt holes; 23. a gasket; 24. buckling-preventing angle steel second bolt holes; 25. beam web bolt holes; 26. and a second bolt hole of the cushion block.
Detailed Description
The present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1-7, the technical scheme adopted by the invention is a semi-rigid steel frame beam column node based on buckling-restrained angle steel, comprising: the steel column comprises a column 1, a beam 2, dog bone angle steel 3, a shear plate 4, buckling-restrained angle steel 5, a cushion block 6, a connecting plate 7, stiffening ribs and 8 bolts 9, wherein no welding exists between the node beam 2 and the column 1. The shear plate 4 is welded at the flange of the column 1, the connecting plate 7 is welded with the two dog-bone angle steels 3, the centers of the two dog-bone angle steels are at the same point, and the stress is ensured to be even.
The connecting plate 7 is connected with the bolt hole 10 of the column 1 through the bolt hole 22, and the bolt hole 16 processed at the end part of the dog bone angle steel 3 is connected with the first bolt hole 14 at the flange of the beam 2 through bolts. The buckling preventing angle steel 5 is connected with the flange second bolt hole 13 of the beam 2 through the second bolt hole 24 and the first bolt hole 18 of the cushion block 6, the buckling preventing angle steel 5 is connected with the web bolt hole 25 of the beam 2 through the first bolt hole 17 and the second bolt hole 26 of the cushion block 6, and the gasket 23 is arranged between the buckling preventing angle steel 5 and the cushion block 6.
The shear plate 4 is connected with the third bolt hole 12 of the web plate of the beam 2 through bolts, and round holes 19 and slotted holes 20 and 21 are machined in the shear plate 4. The slot 20 bears the vertical shearing force, the slot 21 shares the transverse shearing force, and the node is allowed to rotate by taking the round hole 19 of the shearing plate 4 as the rotation center while resisting shearing. In order to ensure the mechanical property of the node area, stiffening ribs 8 are welded at the joint of the column 1 and the connecting plate 7. The end of the beam 2 is processed into a trapezoid 11 to prevent collision when the node of the beam 2 and the column 1 rotates. The dog bone angle 3 is provided with a weakened section 15.
Compared with the common angle steel and T plate connecting node, the node has the advantages of simple structure, clear stress, convenience in design and the like. The four-dog-bone angle steel is arranged around the beam web in a pasting mode, the impact on the floor is small, the shearing plate is connected with the beam web through round holes and slotted holes, the shearing plate bears shearing force at the moment, the dog-bone angle steel bears bending moment, plastic deformation of the node is concentrated in a weakening section of the dog-bone angle steel when an earthquake occurs, the beam and the column are in an elastic state, and only damaged angle steel needs to be replaced after the earthquake is finished.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes including changes in materials and connection modes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention, but any modifications, equivalent substitutions, improvements, etc. should be included in the scope of the present invention.
Claims (2)
1. Semi-rigid steel frame beam column node based on buckling-restrained angle steel, characterized by comprising: the steel column comprises a column (1), a beam (2), dog-bone angle steel (3), a shear plate (4), buckling-restrained angle steel (5), a cushion block (6), a connecting plate (7), stiffening ribs and (8) bolts (9), wherein no welding exists between the node beam (2) and the column (1); the shear plates (4) are welded at the flanges of the columns (1), and the connecting plates (7) are welded with the two dog-bone angle steels (3) with the same centroid, so that uniform stress is ensured;
the connecting plate (7) is connected with the bolt hole (10) of the column (1) through a bolt hole (22), and a bolt hole (16) is processed at the end part of the dog-bone angle steel (3) and is connected with a first bolt hole (14) at the flange of the beam (2) through a bolt; the buckling-restrained angle steel (5) is connected with the flange second bolt hole (13) of the beam (2) through the second bolt hole (24) and the first bolt hole (18) of the cushion block (6), the buckling-restrained angle steel (5) is connected with the web bolt hole (25) of the beam (2) through the first bolt hole (17) and the second bolt hole (26) of the cushion block (6), and the gasket (23) is positioned between the buckling-restrained angle steel (5) and the cushion block (6);
the shear plate (4) is connected with a third bolt hole (12) of the web plate of the beam (2) through a bolt, and a round hole (19) and slotted holes (20) and (21) are formed in the shear plate (4); the slotted holes (20) bear vertical shearing force, the slotted holes (21) share the transverse shearing force, and the nodes are allowed to rotate by taking round holes (19) of the shearing plates (4) as rotation centers while resisting shearing; in order to ensure the mechanical property of the node domain, a stiffening rib (8) is welded at the joint of the column (1) and the connecting plate (7); the end part of the beam (2) is processed into a trapezoid (11) to prevent the beam (2) from colliding with the column (1) when the node rotates; the dog bone angle steel (3) is provided with a weakening section (15).
2. The beam column node of the semi-rigid steel frame based on the buckling-restrained angle steel, which is disclosed in claim 1, wherein four dog-bone-shaped angle steels (3) are arranged around a beam web, and the influence on a floor slab is small; the shearing force plate adopts the round holes and the slotted holes to be connected with the beam web plate, so that the plane is allowed to rotate, and the shearing force plate bears the shearing force; the dog-bone angle steel bears bending moment, when an earthquake occurs, the plastic deformation of the node is concentrated on the weakening section of the dog-bone angle steel, and the beam and the column are in an elastic state; after the earthquake is finished, only damaged angle steel is replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310048606.1A CN116005796A (en) | 2023-01-31 | 2023-01-31 | Semi-rigid steel frame beam column node based on buckling-restrained angle steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310048606.1A CN116005796A (en) | 2023-01-31 | 2023-01-31 | Semi-rigid steel frame beam column node based on buckling-restrained angle steel |
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| CN116005796A true CN116005796A (en) | 2023-04-25 |
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| CN202310048606.1A Pending CN116005796A (en) | 2023-01-31 | 2023-01-31 | Semi-rigid steel frame beam column node based on buckling-restrained angle steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116927334A (en) * | 2023-09-15 | 2023-10-24 | 集术装备科技有限公司 | Hemming section steel assembled building structure and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116927334A (en) * | 2023-09-15 | 2023-10-24 | 集术装备科技有限公司 | Hemming section steel assembled building structure and construction method |
| CN116927334B (en) * | 2023-09-15 | 2023-12-01 | 集术装备科技有限公司 | Hemming section steel assembled building structure and construction method |
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