Axial type metal damper connecting structure and connecting method

Abstract

The invention discloses an axial type metal damper connecting structure and a connecting method, the axial type metal damper connecting structure comprises an energy dissipater and a connecting piece, the energy dissipater is an axial type energy dissipater, one end of the energy dissipater is connected with a main body structure node, and the other end of the energy dissipater is connected with the connecting piece; the connecting piece comprises a steel pipe, edge sealing plates, connectors, prestressed steel bars and nuts, the edge sealing plates are arranged at the two ends of the steel pipe respectively, one side of the edge sealing plate located on the energy dissipater side is connected with the energy dissipater, and the other side of the edge sealing plate is connected with one end of the steel pipe; one side of the edge sealing plate on the connector side is connected with the connector, and the other side is connected with the other end of the steel pipe; the prestressed reinforcement is located in the steel pipe, threads are engraved at the two ends of the prestressed reinforcement, and the two ends of the prestressed reinforcement penetrate through the corresponding edge sealing plates to be connected with the nuts respectively. According to the connecting piece, the overall axial rigidity of the connecting piece is improved, more axial deformation is distributed to the energy dissipater, the steel consumption can be reduced under the same axial rigidity, and the cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building structure engineering, and in particular to an axial metal damper connection structure and a connection method. Background Art

[0002] Energy dissipation and shock absorption technology, as a new technology for building structures to cope with earthquake disasters, has been increasingly used, especially in civil buildings.

[0003] By installing energy dissipators in buildings, when the building is subjected to earthquakes, the internal energy dissipators can enter the energy dissipation state before the main structure, absorb earthquake energy, and thus protect the main structure. Common energy dissipator connection methods mainly include wall-type connection, upper support-type connection, and single-slant brace axial connection. Among them, the single-slant brace axial connection is that one end of the energy dissipator is connected to the main structure, the other end is axially connected to the connecting member (steel support or other type of support), and then one end of the connecting member is connected to the main structure. This type of axial connection is the most direct way to transmit force, and it is an effective connection method that gives full play to the deformation and energy dissipation performance of the energy dissipator.

[0004] However, this type of connection component currently mainly uses square steel pipes or other steel components, which will also produce a certain axial deformation when transmitting the axial load of the energy dissipator, so that the deformation of the energy dissipator cannot be more effectively exerted. In addition, increasing the cross-section of the connection component can more effectively concentrate the axial deformation on the energy dissipator and give full play to the energy dissipation effect of the energy dissipator. However, increasing the cross-sectional area of ​​the connection component means increasing the amount of steel used, increasing the cost of shock absorption, and reducing the economic efficiency of the building. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an axial metal damper connection structure and connection method, which improves the overall axial stiffness of the connection component and distributes more axial deformation to the energy dissipator. Compared with connecting components made of pure steel, it can save steel and greatly reduce costs under the same axial stiffness. Prestressed steel bars are provided in the steel pipe filled with concrete, which can avoid the problem of insufficient axial tensile strength of concrete and improve the overall tensile strength of the connection component.

[0006] The present invention is implemented as follows: an axial metal damper connection structure includes an energy dissipator and a connecting piece, wherein the energy dissipator is an axial energy dissipator, one end of the energy dissipator is connected to a node of a main structure, and the other end is connected to the connecting piece;

[0007] The connecting parts include a steel pipe, an edge sealing plate, a connecting head, prestressed steel bars and nuts. The edge sealing plates are respectively arranged at both ends of the steel pipe. One side of the edge sealing plate on the energy dissipator side is connected to the energy dissipator, and the other side is connected to one end of the steel pipe; one side of the edge sealing plate on the connecting head side is connected to the connecting head, and one side is connected to the other end of the steel pipe; the steel pipe is filled with concrete, the prestressed steel bars are located in the steel pipe, and both ends of the prestressed steel bars are engraved with threads, and the two ends of the prestressed steel bars are respectively passed through the corresponding edge sealing plates and connected to the nuts.

[0008] In the above technical solution, preferably, a plurality of prestressed steel bars are provided in the steel pipe, and the prestressed steel bars are arranged along the length direction of the steel pipe and close to the inner periphery of the steel pipe.

[0009] In the above technical solution, preferably, the cross-sectional area of ​​the steel pipe satisfies the following formula:

[0010]

[0011] Among them, A1 is the cross-sectional area of ​​the steel pipe, in mm 2 ;

[0012] A P is the total cross-sectional area of ​​the prestressed steel bars, in mm 2 ;

[0013] F D is the design bearing capacity of the energy dissipator, in kN;

[0014] f y It is the strength design value of the material used for the steel pipe, in MPa;

[0015] f yp It is the strength design value of the material used for prestressed steel bars, in MPa;

[0016] σ p It is the initial tensile stress of prestressed steel bar, in MPa.

[0017] In the above technical solution, preferably, a hole is opened on one side of the middle position of the steel pipe.

[0018] In the above technical solution, preferably, the connection structure further includes an energy dissipator stiffening plate, and the energy dissipator stiffening plate is arranged at the connection position between the energy dissipator and the connecting piece.

[0019] In the above technical solution, it is further preferred that the energy dissipator stiffening plate is a triangular steel plate.

[0020] In the above technical solution, preferably, the connecting head is a cross-shaped steel.

[0021] In the above technical solution, preferably, the energy dissipation type of the energy dissipation device is a viscous energy dissipation type, a metal yield type, a friction type or other axial energy dissipation type of energy dissipation device.

[0022] A method for connecting an axial metal damper comprises the following steps:

[0023] The edge sealing plate on the energy dissipator side is connected and fixed to one end of the steel pipe through a fillet weld, the edge sealing plate on the connector side is welded and fixed to the other end of the steel pipe, and an expansion joint is reserved between the edge sealing plate on the connector side and the outer periphery of the steel pipe, and the expansion joint is sealed with a flexible filling material;

[0024] Multiple prestressed steel bars are arranged along the length of the steel pipe and near the inner periphery of the steel pipe. Both ends of the prestressed steel bars pass through the edge sealing plates, and the two ends of the prestressed steel bars are tensioned by tensioning equipment to put them in a pre-tightened state.

[0025] Pour concrete into the steel pipe through the holes to fill the inside of the steel pipe;

[0026] After the concrete solidifies to a certain strength, remove the spot welding and flexible filling materials between the edge plate and the steel pipe on the side of the joint, and remove the pre-tightening force at both ends of the prestressed steel bar to pre-tighten the concrete. After the concrete is deformed and stabilized after pre-tightening, fillet welds are used to weld the edge plate and the steel pipe on the side of the joint on all four sides.

[0027] Put the nut into the prestressed steel bar and tighten it so that the inner side of the nut is close to the outer side of the edge sealing board;

[0028] Connect the connector vertically to the outer surface of the edge banding board by welding;

[0029] One end of the energy dissipator is vertically connected to the edge sealing plate by welding, and the energy dissipator stiffening plate is welded to the connection position of the energy dissipator and the connecting piece by welding.

[0030] The advantages and positive effects of the present invention are:

[0031] 1. The present invention fills the steel pipe of the connector with concrete, which, on the one hand, improves the overall axial stiffness of the connector and distributes more axial deformation to the energy dissipator. Compared with connecting components made of pure steel, the amount of steel can be saved at the same axial stiffness, greatly reducing costs. On the other hand, filling the steel pipe with concrete can greatly improve the axial stability of the steel pipe. Under the same stability, compared with the pure steel form, the cross-sectional size of the steel component can be reduced, so that the connector can better meet the needs of coordinating the use space of the building or process.

[0032] 2. The present invention provides prestressed steel bars in a steel pipe filled with concrete, and applies the technical advantages of prestressed concrete to the energy dissipation and shock absorption connection structure, thereby overcoming the problem of insufficient axial tensile strength of the concrete filled in the steel pipe and improving the overall tensile strength of the connection.

[0033] 3. The connection method of the present invention is easy to construct, and the assembly efficiency is significantly improved, ensuring the feasibility and efficiency of on-site installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of an axial metal damper connection structure provided by an embodiment of the present invention;

[0035] Figure 2 for Figure 1 Middle AA section;

[0036] Figure 3 for Figure 1 Middle BB section;

[0037] Figure 4 A schematic structural diagram of a connecting piece provided in an embodiment of the present invention.

[0038] In the figure: 1. Energy dissipator; 2. Energy dissipator stiffening plate; 3. Connectors; 4. Steel pipes; 5. Prestressed steel bars; 6. Nuts; 7. Edge sealing plates; 8. Connectors; 9. Concrete; 10. Holes. DETAILED DESCRIPTION

[0039] 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 are within the scope of protection of the present invention.

[0040] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Example 1

[0043] See also Figure 1 An embodiment of the present invention provides an axial metal damper connection structure, including an energy dissipator 1 and a connecting piece 3. The energy dissipator 1 is an axial energy dissipator, one end of the energy dissipator 1 is connected to the node of the main structure, and the other end is connected to the connecting piece 3. The connecting piece 3 is connected to the energy dissipator 1 through an edge sealing plate located on the side of the energy dissipator 1, and can be connected by welding. The longitudinal axis of the energy dissipator 1 is coaxially aligned with the central axis of the connecting piece 3.

[0044] The connecting part 3 includes a steel pipe 4, an edge sealing plate 7, a connecting head 8, a prestressed steel bar 5 and a nut 6. The edge sealing plates 7 are respectively arranged at both ends of the steel pipe 4. One side of the edge sealing plate 7 located on the side of the energy dissipator 1 is connected to the energy dissipator 1, and the other side is connected to one end of the steel pipe 4; one side of the edge sealing plate 7 located on the side of the connecting head 8 is connected to the connecting head 8, and one side is connected to the other end of the steel pipe 4; the steel pipe 4 is filled with concrete 9, and the prestressed steel bar 5 is located in the steel pipe 4. The two end heads of the prestressed steel bar 5 are engraved with threads, and the two ends of the prestressed steel bar 5 are respectively connected to the nuts 6 through the corresponding edge sealing plates 7.

[0045] As a preferred embodiment, a plurality of prestressed steel bars 5 are provided in the steel pipe 4, and the prestressed steel bars 5 are arranged along the length direction of the steel pipe 4 and close to the inner periphery of the steel pipe 4, thereby overcoming the problem of insufficient axial tensile strength of the concrete 9 filled in the steel pipe 4 and improving the overall tensile strength of the connector 3.

[0046] As a preferred embodiment, the cross-sectional area of ​​the steel pipe 4 satisfies the following formula:

[0047]

[0048] Among them, A1 is the cross-sectional area of ​​the steel pipe 4, in mm 2 ;

[0049] A P is the total cross-sectional area of ​​prestressed steel bar 5, in mm 2 ;

[0050] F D is the design bearing capacity of the energy dissipator 1, in kN;

[0051] f y is the strength design value of the material used for the steel pipe 4, in MPa;

[0052] f yp is the strength design value of the material used for prestressed steel bar 5, in MPa;

[0053] σ p is the initial tensile stress of prestressed steel bar 5, in MPa.

[0054] As a preferred embodiment, a hole 10 is provided on one side of the middle position of the steel pipe 4 to facilitate pouring of concrete 9. The steel pipe 4 is a square steel pipe, or a round steel pipe, or a steel pipe of other shapes.

[0055] As a preferred embodiment, the connection structure further includes an energy dissipator stiffening plate 2, which is arranged at the connection position between the energy dissipator 1 and the connecting piece 3 to improve the stability of the connection between the energy dissipator 1 and the connecting piece 3.

[0056] As a preferred implementation, the energy dissipator stiffening plate 2 is a triangular steel plate, which facilitates the connection between the energy dissipator 1 and the connecting piece 3 .

[0057] As a preferred embodiment, the connecting head 8 is a cross-shaped steel, so that the force is uniform and stable, and it is easy to be welded with the node plate of the main structure.

[0058] As a preferred embodiment, the energy dissipation type of the energy dissipation device 1 is a viscous energy dissipation type, a metal yield type, a friction type or other axial energy dissipation type energy dissipation device. In this embodiment, a viscous energy dissipation type energy dissipation device is selected.

[0059] Example 2

[0060] A method for connecting an axial metal damper comprises the following steps:

[0061] The steel pipe 4 is a square steel pipe, and the edge sealing plate 7 has two pieces, which are respectively arranged at both ends of the steel pipe 4. The edge sealing plate 7 on the side of the energy dissipator 1 is connected and fixed to one end of the steel pipe 4 through a fillet weld, and the edge sealing plate 7 on the side of the connector 8 is welded and fixed to the other end of the steel pipe 4, and an expansion joint is reserved between the edge sealing plate 7 on the side of the connector 8 and the outer periphery of the steel pipe 4, and the expansion joint is sealed with a flexible filling material;

[0062] A plurality of prestressed steel bars 5 are arranged along the length direction of the steel pipe 4 and near the inner periphery of the steel pipe 4. In this embodiment, four prestressed steel bars 5 are arranged in the steel pipe 4. Figure 2 As shown, both ends of the prestressed steel bar 5 pass through two edge sealing plates 7 arranged at both ends of the steel pipe 4, and the two ends of the prestressed steel bar 5 are tensioned by tensioning equipment to put them in a pre-tightened state;

[0063] like Figure 4 As shown, a hole 10 is opened on one side of the middle position of the steel pipe 4, and concrete 9 is poured into the steel pipe 4 through the hole 10 to fill the inside of the steel pipe 4;

[0064] After the concrete 9 solidifies to a certain strength, the spot welding and the flexible filling material between the edge plate 7 and the steel pipe 4 on the side of the connector 8 are removed, and the pre-tightening force at both ends of the prestressed steel bar 5 is removed to pre-tighten the concrete 9. After the deformation of the concrete 9 is stabilized after pre-tightening, the edge plate 7 and the steel pipe 4 on the side of the connector 8 are welded around the four sides with fillet welds;

[0065] Insert the nut 6 into the prestressed steel bar 5 and tighten it so that the inner side of the nut 6 is close to the outer side of the edge sealing plate 7;

[0066] The connector 8 is a cross-shaped steel, and is vertically connected to the outer surface of the edge sealing plate 7 by welding;

[0067] One end of the energy dissipator 1 is vertically connected to the edge plate 7 by welding, and the energy dissipator stiffening plate 2 is welded to the connection position between the energy dissipator 1 and the connecting piece 3 by welding.

[0068] The present invention improves the overall axial stiffness of the connector, distributes more axial deformation to the energy dissipator, saves steel, and significantly reduces costs; greatly improves the axial stability of the steel pipe, reduces the cross-sectional size of the steel component, and makes the connector more compatible with the space requirements of the building or process; overcomes the problem of insufficient axial tensile strength of the concrete filled in the steel pipe, and improves the overall tensile strength of the connector. The connection method is easy to construct, and the assembly efficiency is significantly improved, ensuring the feasibility and efficiency of on-site installation.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An axial metal damper connection structure, characterized in that: It includes an energy dissipator and a connecting piece, wherein the energy dissipator is an axial type energy dissipator, one end of the energy dissipator is connected to the node of the main structure, and the other end is connected to the connecting piece; The connecting parts include a steel pipe, an edge sealing plate, a connecting head, prestressed steel bars and nuts. The edge sealing plates are respectively arranged at both ends of the steel pipe. One side of the edge sealing plate on the energy dissipator side is connected to the energy dissipator, and the other side is connected to one end of the steel pipe; one side of the edge sealing plate on the connecting head side is connected to the connecting head, and one side is connected to the other end of the steel pipe; the steel pipe is filled with concrete, the prestressed steel bars are located in the steel pipe, and both ends of the prestressed steel bars are engraved with threads, and the two ends of the prestressed steel bars are respectively passed through the corresponding edge sealing plates and connected to the nuts.

2. The axial metal damper connection structure according to claim 1, characterized in that: A plurality of prestressed steel bars are arranged in the steel pipe, and the prestressed steel bars are arranged along the length direction of the steel pipe and close to the inner periphery of the steel pipe.

3. The axial metal damper connection structure according to claim 2, characterized in that: The cross-sectional area of ​​the steel pipe satisfies the following formula: Among them, A1 is the cross-sectional area of ​​the steel pipe, in mm 2 ; A P is the total cross-sectional area of ​​the prestressed steel bars, in mm 2 ; F D is the design bearing capacity of the energy dissipator, in kN; f y It is the strength design value of the material used for the steel pipe, in MPa; f yp It is the strength design value of the material used for prestressed steel bars, in MPa; σ p It is the initial tensile stress of prestressed steel bar, in MPa.

4. The axial metal damper connection structure according to claim 1, characterized in that: A hole is provided on one side of the middle position of the steel pipe.

5. The axial metal damper connection structure according to claim 1, characterized in that: The connection structure also includes an energy dissipator stiffening plate, which is arranged at the connection position between the energy dissipator and the connecting piece.

6. The axial metal damper connection structure according to claim 5, characterized in that: The energy dissipator stiffening plate is a triangular steel plate.

7. The axial metal damper connection structure according to claim 1, characterized in that: The connecting head is a cross-shaped steel.

8. The axial metal damper connection structure according to claim 1, characterized in that: The energy dissipation type of the energy dissipator is a viscous energy dissipation type, a metal yield type, a friction type or other axial energy dissipation type energy dissipation type.

9. A method for connecting an axial metal damper, the method being implemented based on the connection structure according to any one of claims 1 to 8, characterized in that: The steps include: The edge sealing plate on the energy dissipator side is connected and fixed to one end of the steel pipe through a fillet weld, the edge sealing plate on the connector side is welded and fixed to the other end of the steel pipe, and an expansion joint is reserved between the edge sealing plate on the connector side and the outer periphery of the steel pipe, and the expansion joint is sealed with a flexible filling material; Multiple prestressed steel bars are arranged along the length of the steel pipe and near the inner periphery of the steel pipe. Both ends of the prestressed steel bars pass through the edge sealing plates, and the two ends of the prestressed steel bars are tensioned by tensioning equipment to put them in a pre-tightened state. Pour concrete into the steel pipe through the holes to fill the inside of the steel pipe; After the concrete solidifies to a certain strength, remove the spot welding and flexible filling materials between the edge plate and the steel pipe on the side of the joint, and remove the pre-tightening force at both ends of the prestressed steel bar to pre-tighten the concrete. After the concrete is deformed and stabilized after pre-tightening, fillet welds are used to weld the edge plate and the steel pipe on the side of the joint on all four sides. Put the nut into the prestressed steel bar and tighten it so that the inner side of the nut is close to the outer side of the edge sealing board; Connect the connector vertically to the outer surface of the edge banding board by welding; One end of the energy dissipator is vertically connected to the edge sealing plate by welding, and the energy dissipator stiffening plate is welded to the connection position of the energy dissipator and the connecting piece by welding.

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