Self-resetting friction damper

Abstract

The utility model discloses a self-resetting friction damper which comprises a first auxiliary plate and a second auxiliary plate which are arranged in parallel and kept fixed, a first end plate and a second end plate are arranged in gaps of the auxiliary plates respectively, and a friction plate is arranged between the second end plate and the gaps of the two auxiliary plates. The second end plate slides in the direction where the first end plate is located under the action of external force through the friction plate and dissipates energy, steel strands are arranged on the outer side of the auxiliary plate on the outer side of the second end plate through L-shaped connecting pieces, and the L-shaped connecting pieces at the two ends of the steel strands on the outer side of the first auxiliary plate and the outer side of the second auxiliary plate are connected together through sliding screws and sliding gaskets. And the second end plate sliding due to the action of external force is restored to the original position through the restoring force of the steel strand. According to the damper, the friction plate can be driven to move through the second end plate under the action of external force, energy dissipation can be generated through relative friction of the two auxiliary plates and the friction plate, and therefore the damping effect is achieved, and meanwhile restoring force can be provided through the steel strand to enable the damper to restore to the original position.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of civil engineering structure energy dissipation and shock absorption, in particular to a self-resetting friction damper. BACKGROUND

[0002] Traditional building structure seismic strategy mainly resists earthquake action through improving the strength, stiffness and ductility of the structure, however, this method usually requires the structure to bear large plastic deformation, which leads to significant residual deformation after the earthquake, increasing the difficulty and cost of repair. In contrast, modern energy dissipation and shock absorption technology installs energy dissipation devices in the structure to dissipate seismic energy, reducing the damage to the main structure.

[0003] As a common energy dissipation and shock absorption device, the friction damper is widely used in engineering projects because of its low cost, simple structure and stable performance, which can effectively improve the seismic capacity of the structure. However, the existing friction damper usually does not have self-resetting function, which makes the structure prone to large residual deformation after the earthquake, affecting the integrity of the structure and subsequent use. SUMMARY

[0004] Therefore, in order to solve the above problems, the utility model provides a self-resetting friction damper, which is combined with a self-resetting system to form a self-resetting friction damper. The prestress of the steel strand can provide good self-resetting ability, effectively reducing the residual deformation after the earthquake. At the same time, the friction damper provides sufficient energy dissipation capacity for the device, improving the overall seismic performance.

[0005] The utility model is realized by constructing a self-resetting friction damper, which includes a first secondary plate and a second secondary plate arranged in parallel and fixed, a first end plate and a second end plate are arranged in the gap between the first secondary plate and the second secondary plate, a friction plate is arranged between the second end plate and the gap between the first secondary plate and the second secondary plate, the second end plate slides along the direction of the first end plate under the action of external force and dissipates energy through the friction plate, a steel strand is arranged on the outside of the first secondary plate and the second secondary plate of the second end plate through an L-shaped connecting piece, the L-shaped connecting pieces at both ends of the steel strand on the outside of the first secondary plate and the second secondary plate are connected together through a sliding screw and a sliding gasket, and the second end plate that slides due to external force is restored to its original position by the restoring force of the steel strand.

[0006] The friction plate is installed between the secondary plate and the second end plate, which can dissipate energy through friction during relative sliding, thereby achieving shock absorption.

[0007] The steel strand can provide restoring force for the entire damper, ensuring that the damper can return to its original position and reducing residual deformation.

[0008] Specifically, the first and second sub-plates are fastened and connected by high-strength bolts and fixing washers, a connecting circular hole is formed at one end of the first and second sub-plates, and a plurality of long holes are formed at the other end of the first and second sub-plates, the length direction of the long holes points to the direction of the connecting circular hole, the first end plate is arranged at the connecting circular hole position of the first and second sub-plates, and the second end plate is arranged at the long hole position of the first and second sub-plates.

[0009] The first and second sub-plates are fastened and connected by high-strength bolts and fixing washers, which can form a stable parallel structure.

[0010] Specifically, a connecting circular hole for the high-strength bolt to pass through is formed on the first end plate, the first end plate and the two sub-plates are fixed by the high-strength bolt passing through the first end plate, the two sub-plates and the fixing washer and combined with the nut, a plurality of slot limiting holes corresponding to the long holes are formed on the second end plate, the first sub-plate, the second end plate and the second sub-plate are connected by the sliding screw passing through the long hole and the slot limiting hole and the nut, and a sliding washer in contact with the sub-plate is further arranged on the sliding screw.

[0011] The connecting mode of the first end plate and the sub-plate can ensure that the first end plate remains stationary, thereby transmitting the axial force and the shear force and ensuring the stability of the device, and the slot limiting hole on the second end plate and the long hole on the sub-plate can be connected by the L-shaped connecting piece, the sliding screw and the sliding washer, which can slide relatively under the action of external force.

[0012] Specifically, a circular hole for the sliding screw to pass through is reserved on the surface of the friction plate.

[0013] Specifically, one end of the L-shaped connecting piece is attached to the outer side of the first or second sub-plate, and a circular hole for the sliding screw to pass through is formed on the end, and a fixing hole for the steel strand to pass through and be fixed is formed on the other end of the L-shaped connecting piece, the steel strand is connected in the fixing holes of the two L-shaped connecting pieces and is fixed on the two L-shaped connecting pieces by the nut.

[0014] The steel strand passes through the reserved hole of the L-shaped connecting piece and is fixed by the nut to provide a restoring force, which ensures that the damper can return to the initial state.

[0015] Specifically, a limiting sliding sheet is installed between the first sub-plate, the second sub-plate and the second end plate, a strip-shaped hole for the sliding screw to pass through and corresponding to the long hole on the first sub-plate is formed on the limiting sliding sheet, and the sliding screw can be driven to slide in the strip-shaped hole.

[0016] The limiting sliding sheet can be used to drive the movement of the sliding screw to achieve dynamic balance of the damper.

[0017] Compared with the prior art, the damping device has the following advantages:

[0018] 1、The damping device sets the friction plate between the secondary plate and the second end plate, and sets the steel strand outside the secondary plate, so that the reset function and the energy dissipation function are combined, the structure of the damping device is simplified, installation and maintenance are facilitated, the damping device adopts a detachable and replaceable design, only the friction plate needs to be replaced after the earthquake, material cost is greatly saved, maintenance speed is improved, and the damping device has the characteristics of reusability.

[0019] 2、The damping device can realize the reset function by the restoring force of the steel strand, and dissipate energy through the relative sliding between the friction plate and the related components, so that the damping performance and the reset ability of the structure are improved at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the damping device, and constitute a part of the specification, and are used to explain the damping device together with the specific embodiments of the damping device, but do not constitute any limitation on the damping device. In the drawings:

[0021] Figure 1 It is a structural schematic view of the damping device;

[0022] Figure 2 It is a split schematic view of the damping device;

[0023] Figure 3 It is a top view schematic view of the damping device;

[0024] Figure 4 It is a structural schematic view of the first secondary plate (the first secondary plate and the second secondary plate have the same structure) in the damping device;

[0025] Figure 5 It is a structural schematic view of the first end plate in the damping device;

[0026] Figure 6 It is a structural schematic view of the second end plate in the damping device;

[0027] Figure 7 It is a structural schematic view of the L-shaped connecting piece in the damping device;

[0028] Figure 8 It is a structural schematic view of the limiting sliding piece in the damping device;

[0029] Figure 9 It is a structural schematic view of the friction plate in the damping device;

[0030] In the figure: 1, the first sub-plate; 2, the second sub-plate; 3, the first end plate; 4, the second end plate; 5, high-strength bolt; 6, fixed gasket; 7, L-shaped connecting piece; 8, sliding screw; 9, sliding gasket; 10, limit sliding piece; 11, friction plate; 12, steel strand; 13, nut. DETAILED DESCRIPTION

[0031] The technical scheme of the utility model will be further specifically explained below by specific embodiments and in conjunction with the drawings; it should be understood that the specific embodiments described herein are only used for illustrating and explaining the utility model and are not as any limitation on the utility model; the drawings in the utility model are only used for describing the embodiments and facilitating understanding and use and are not as any relevant limitation on the utility model.

[0032] It should be noted that the structure, proportion, size, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification to enable those skilled in the art to understand and read, and are not used to limit the limiting conditions that can be implemented by the utility model. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0033] As described in the background, the existing friction damper generally does not have a self-resetting function, which makes the structure prone to have a large residual deformation after the earthquake, affecting the integrity of the structure and subsequent use.

[0034] Based on the above reasons, please refer to the drawings Figure 1 The drawings Figure 3 The utility model provides a kind of self-resetting friction damper, including parallelly arranged and fixed first sub-plate 1 and second sub-plate 2, first end plate 3 and second end plate 4 are respectively arranged in the gap between the first sub-plate 1 and second sub-plate 2, friction plate 11 is arranged between second end plate 4 and the gap between the first sub-plate 1 and second sub-plate 2, second end plate 4 is made to slip along the direction of first end plate 3 and dissipate energy under the action of external force by the friction plate 11, steel strand 12 is arranged on the outside of the first sub-plate 1 and the outside of the second sub-plate 2 outside second end plate 4 by L-shaped connecting piece 7, the L-shaped connecting piece 7 of the both ends of steel strand 12 outside the first sub-plate 1 and the second sub-plate 2 is connected together by sliding screw 8 and sliding gasket 9, and the second end plate 4 that slips due to external force is restored to original position by the restoring force of steel strand 12.

[0035] Please refer to the drawings Figure 1 and the drawings Figure 4, specifically, the first sub-plate 1 and the second sub-plate 2 are fastened and connected by high-strength bolts 5 and fixing washers 6, a connecting circular hole is opened at one end of the first sub-plate 1 and the second sub-plate 2, and a plurality of long holes are opened at the other end, the length direction of the long holes points to the direction of the connecting circular hole, the first end plate 3 is arranged at the connecting circular hole position of the first sub-plate 1 and the second sub-plate 2, and the second end plate 4 is arranged at the long hole position of the first sub-plate 1 and the second sub-plate 2.

[0036] Please refer to the attached Figure 1 , the attached Figure 2 and the attached Figure 5 , specifically, the first end plate 3 is provided with a connecting circular hole for the high-strength bolt 5 to pass through, and the high-strength bolt 5 passes through the first end plate 3 and the two sub-plates and the fixing washer 6 and is fixed by the nut 13, please refer to the attached Figure 2 and the attached Figure 6 , a plurality of slot limiting holes corresponding to the long holes are opened on the second end plate 4, the first sub-plate 1, the second end plate 4 and the second sub-plate 2 are connected by the sliding screw 8 passing through the long holes and the slot limiting holes and the nut 13, and the sliding washer 9 in contact with the sub-plate is further arranged on the sliding screw 8.

[0037] Please refer to the attached Figure 2 , the attached Figure 3 and the attached Figure 9 , specifically, the surface of the friction plate 11 is reserved with a circular hole for the sliding screw 8 to pass through.

[0038] Please refer to the attached Figure 1 , the attached Figure 2 and the attached Figure 7 , specifically, one end of the L-shaped connecting piece 7 is attached to the outer side of the first sub-plate 1 or the second sub-plate 2 and is provided with a circular hole for the sliding screw 8 to pass through at the end, a fixing hole for the steel strand 12 to pass through and be fixed is opened at the other end of the L-shaped connecting piece 7, the steel strand 12 is connected in the fixing holes of the two L-shaped connecting pieces 7 and is fixed on the two L-shaped connecting pieces 7 by the nut 13.

[0039] Please refer to the attached Figure 2 , the attached Figure 3 and the attached Figure 8 , specifically, the first sub-plate 1, the second sub-plate 2 and the second end plate 4 are installed with a limiting sliding piece 10, the limiting sliding piece 10 is provided with a strip-shaped hole for the sliding screw 8 to pass through and corresponding to the long hole on the first sub-plate 1, and the sliding screw 8 can be driven to slide in the strip-shaped hole.

[0040] The high-strength bolts recorded in the damper are all pre-tightened according to the requirements of Technical Specification for High-strength Bolted Connections of Steel Structures (JGJ82-2011), and the steel strands are determined to have a tension control stress according to the Design Standard of Concrete Structures, so as to determine the prestress.

[0041] In use, when the damper is under a small force, the high-strength bolts 5 and the fixing washers 6 are fastened, a large static friction force is generated between the friction plates 11 and the first and second sub-plates 1 and 2, the friction plates 11 and the second end plate 4 in the damper do not immediately slide, and the entire damper remains relatively static.

[0042] When the external force is greater than the static friction force between the friction plates 11 and the first and second sub-plates 1 and 2, the damper starts to move relatively, the second end plate 4 drives the sliding screw 8 and the friction plates 11 to slide relatively under the action of the external force, and in the sliding process, the sliding friction force generated between the friction plates 11 and the first and second sub-plates 1 and 2 resists the external force, so as to achieve the energy dissipation and shock absorption effect.

[0043] When the external force continues to increase, the second end plate 4 drives the sliding screw 8 to move to the limit position of the long hole under the action of the external force, at this time, the steel strands 12 are stretched, and in this stage, the external force, the sliding friction force and the reaction force of the prestressed steel strands are in a dynamic balance state, so that the sliding process tends to be stable.

[0044] When the external force decreases or disappears, the restoring force of the steel strands 12 will play a role to pull the second end plate 4 and the friction plates 11 back to the initial position, realize self-resetting, the sliding friction force of the friction plates 11 decreases at this time, the second end plate 4 gradually stops sliding, and the device returns to the original equilibrium state.

[0045] The above description is a detailed description of the preferred and feasible embodiments of the utility model, but the embodiments are not used to limit the patent application range of the utility model, and any equivalent changes or modified changes completed under the technical spirit of the utility model should belong to the patent range covered by the utility model.

Claims

1. A self-centering friction damper, characterized by: The utility model discloses a kind of energy dissipation structures, including parallelly arranged and fixed first sub-plate and second sub-plate, first end plate and second end plate are respectively arranged in the gap of first sub-plate and second sub-plate, friction plate is arranged between second end plate and the gap of first sub-plate and second sub-plate, second end plate is made to slip along the direction of first end plate under the action of external force by the friction plate and dissipates energy, steel strand is arranged on the outside of first sub-plate and second sub-plate outside second end plate by L-shaped connector, the L-shaped connector of both ends of steel strand outside first sub-plate and second sub-plate is connected together by sliding screw and sliding gasket, and the second end plate that slips due to external force is restored to original position by the restoring force of steel strand.

2. The self-centering frictional damper according to claim 1, wherein: The first sub-plate and the second sub-plate are fastened and connected by high-strength bolts and fixed gaskets, a connecting circular hole is formed at one end of the first sub-plate and the second sub-plate, and a plurality of long holes are formed at the other end, the length direction of the long holes points to the direction of the connecting circular hole, the first end plate is arranged at the connecting circular hole position of the first sub-plate and the second sub-plate, and the second end plate is arranged at the long hole position of the first sub-plate and the second sub-plate.

3. The self-centering frictional damper according to claim 2, wherein: A connecting circular hole for the high-strength bolt to pass through is formed on the first end plate, the first end plate and the two sub-plates are fixed by the high-strength bolt passing through the first end plate, the two sub-plates and the fixed gasket and combined with the nut, a plurality of slot limiting holes corresponding to the long holes are formed on the second end plate, the first sub-plate, the second end plate and the second sub-plate are connected by the sliding screw passing through the long holes and the slot limiting holes and the nut, and a sliding gasket in contact with the sub-plate is further arranged on the sliding screw.

4. The self-centering frictional damper according to claim 1, wherein: A circular hole for the sliding screw to pass through is reserved on the surface of the friction plate.

5. The self-centering frictional damper according to claim 1, wherein: One end of the L-shaped connector is attached to the outside of the first sub-plate or the second sub-plate, a circular hole for the sliding screw to pass through is formed on the end, a fixing hole for the steel strand to pass through and be fixed is formed on the other end of the L-shaped connector, the steel strand is connected in the fixing holes of the two L-shaped connectors and fixed on the two L-shaped connectors by the nut.

6. The self-centering frictional damper according to claim 1, wherein: A limiting sliding sheet is installed between the first sub-plate, the second sub-plate and the second end plate, a strip-shaped hole for the sliding screw to pass through and corresponding to the long hole on the first sub-plate is formed on the limiting sliding sheet, and the sliding screw can be driven to slide in the strip-shaped hole.

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