Buckling self-resetting damper
By designing a buckling self-resetting damper, the problem of residual deformation of buildings after an earthquake is solved by utilizing elastic buckling elements and friction slip mechanisms, achieving self-resetting of the structure and energy dissipation, reducing post-earthquake repair costs, and improving seismic toughness.
Patent Information
- Application Number
- CN202422899374.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-26
AI Technical Summary
Existing building structures often retain significant residual deformation after earthquakes, leading to loss of building function and high post-earthquake repair costs, which existing earthquake-resistant technologies struggle to address effectively.
By employing a buckling self-resetting damper, the structure achieves self-resetting and energy dissipation through the nonlinear elastic behavior of the elastic buckling element and the energy dissipation mechanism of frictional slip.
It effectively reduces residual deformation of buildings after an earthquake, improves the post-earthquake resilience of buildings, reduces repair costs, and enhances seismic toughness.
Smart Images
Figure CN223523290U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of earthquake engineering, especially to a buckling self-resetting damper. BACKGROUND
[0002] Under the action of earthquake, the building structure component will enter the nonlinear stage, and a part of the earthquake input energy is dissipated through the elastic-plastic hysteretic energy consumption, so as to control the maximum seismic response of the structure and prevent the structure from collapsing under the action of strong earthquake. However, the structure may still have a large residual deformation after the earthquake, that is, the structure cannot be restored to its initial position, which will result in the loss of building use function and increase the economic cost of post-earthquake repair, and has a great influence on the post-disaster reconstruction work and the recovery of social order.
[0003] However, the existing seismic technology still has significant limitations. Even after the earthquake, the building structure often has a large residual deformation. That is, the structure cannot be restored to its initial position, which has a series of serious impacts: from the perspective of building use function, residual deformation will change the building space and affect the normal use of various facilities inside the building, and even some areas may not be used normally, resulting in the loss of building use function. From the economic cost aspect, a large residual deformation means that more manpower, material resources and financial resources need to be invested in post-earthquake repair work, including reinforcement of the structure, repair of the deformed part, and treatment of damaged decorations and equipment, which greatly increases the economic cost of post-earthquake repair. Therefore, there is an urgent need for a connecting structure or device that can effectively solve the problem of structural residual deformation to improve the recoverability of building structure after the earthquake. SUMMARY
[0004] The utility model aims at providing a buckling self-resetting damper for improving the recoverability of building after the earthquake, reducing the post-earthquake repair cost, and improving the seismic toughness of the building.
[0005] The utility model provides a buckling self-resetting damper, which comprises an internal shear plate, a connecting plate, a stop block, a connecting support, an elastic buckling piece and two external shear plates, the two external shear plates are symmetrically arranged on the two sides of the external shear plate and the connecting plate, a friction plate is arranged between the internal shear plate and the external shear plate, the external shear plate is provided with two first stop holes, the internal shear plate is provided with second stop holes corresponding to the two first stop holes respectively, the stop block passes through the first stop hole and the second stop hole and is fixedly connected with the connecting support, and the two ends of the elastic buckling piece are hingedly connected with the two connecting supports respectively; the connecting plate is fixedly connected with the two external shear plates.
[0006] Further, the first stop hole and the second stop hole have the same length and width, and the edges of the first stop hole and the second stop hole are projected to coincide.
[0007] Further, the distance between the two end faces of the stop block is not less than the distance between the outer surfaces of the two outer shear plates.
[0008] Further, the cross-sectional width of the stop block is less than the cross-sectional width of the first stop hole and the second stop hole.
[0009] Further, each of the stop blocks is connected to the connecting supports at both ends thereof by bolts.
[0010] Further, the elastic bending member comprises a bending plate, both ends of the bending plate are provided with a hinge part, and the connecting support is provided with a hinge groove matched with the hinge part.
[0011] Further, the outer side of the outer shear plate is provided with a raised block between the two first stop holes, and the height of the raised block is equal to the minimum distance from the bending plate to the outer shear plate.
[0012] Further, two friction plates are arranged between each of the outer shear plates and the inner shear plate, and the two friction plates are symmetrically arranged above and below the elastic bending member.
[0013] Further, the friction plate, the inner shear plate and the outer shear plate are connected by bolts, the friction plate is provided with a first through hole, the outer shear plate is provided with a second through hole, and the inner shear plate is provided with a sliding groove hole, and the bolt for fastening the friction plate is arranged in the first through hole, the second through hole and the sliding groove hole.
[0014] Further, a plurality of third through holes are arranged on the outer shear plate, a plurality of fourth through holes corresponding to the third through holes are arranged on the connecting plate, and the connecting plate and the outer shear plate are connected by bolts at the corresponding third through holes and fourth through holes.
[0015] The beneficial effects of the technical solution are: when the inner shear plate and the connecting plate are relatively sheared, the relative position change between the first stop hole and the second stop hole will push the two stop blocks to produce compression deformation, so as to make the elastic bending unit compression bending, provide a reset force, and at the same time, the friction plate and the inner shear plate are frictionally slipped to dissipate the seismic energy. The nonlinear elastic behavior of the elastic bending member under compression bending is used as the self-resetting mechanism of the damper, and the frictional sliding energy dissipation mechanism is used to provide part of the energy dissipation capacity, so as to realize the expected self-resetting-energy dissipation mechanism. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0017] Figure 1 It is an external view of the buckling self-resetting damper in the present application.
[0018] Figure 2 It is an exploded view of the buckling self-resetting damper in the present application.
[0019] Figure 3 It is a schematic view of the external shear plate.
[0020] Figure 4 It is a schematic view of the internal shear plate.
[0021] Figure 5 It is a schematic view of the connecting support.
[0022] Figure 6 It is a schematic view of the elastic buckling member.
[0023] Figure 7 It is a schematic view of the working mechanism of the buckling self-resetting damper.
[0024] The reference signs are as follows: 1-external shear plate, 11-second through hole, 12-third through hole, 13-first stop hole, 14-protruding block, 2-internal shear plate, 21-sliding slot hole, 22-second stop hole, 3-connecting plate, 31-fourth through hole, 4-connecting support, 41-fifth through hole, 42-hinge groove, 5-elastic buckling member, 51-buckling plate, 52-hinge part, 6-stop block, 61-sixth through hole, 7-friction plate, 71-first through hole, 8-high-strength bolt. DETAILED DESCRIPTION
[0025] The technical solutions of the present application will be described below in conjunction with the embodiments, and obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.
[0026] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0027] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited. In addition, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0028] Embodiment 1
[0029] As Figures 1-7 shown, the utility model provides a kind of flexure self-resetting damper, including internal shear plate 2, connecting plate 3, stop block 6, connecting support 4, elastic flexure 5 and two external shear plates 1, two external shear plates 1 are symmetrically arranged at the two sides of external shear plate 1 and connecting plate 3;Two pieces of friction plate 7 are arranged between internal shear plate 2 and two external shear plates 1, two pieces of friction plate 7 are respectively symmetrically arranged on the upper and lower sides of elastic flexure 5.Friction plate 7, internal shear plate 2 and external shear plate 1 are connected by high-strength bolt 8, first through hole 71 is formed in friction plate 7, second through hole 11 is formed in external shear plate 1, sliding slot hole 21 is formed in internal shear plate 2, high-strength bolt 8 for fastening friction plate 7 is arranged in first through hole 71, second through hole 11 and sliding slot hole 21, and pre-tightening force is applied to external shear plate 1, internal shear plate 2 and friction plate 7 by high-strength bolt 8.
[0030] The outer shear plate 1 is provided with two first stop holes 13, and the inner shear plate 2 is provided with second stop holes 22 corresponding to the two first stop holes 13 respectively. The length and width of the first stop holes 13 and the second stop holes 22 are completely same, and the edge projection of the first stop holes 13 and the second stop holes 22 is coincident. The stop block 6 passes through the first stop holes 13 and the second stop holes 22 and is fixedly connected with the connecting supports 4 at both ends through high-strength bolts 8. The connecting supports 4 are provided with a plurality of fifth through holes 41, and the stop block 6 is provided with a plurality of sixth through holes 61 corresponding to the fifth through holes 41. During installation, the high-strength bolts 8 are arranged in the fifth through holes 41 and the sixth through holes 61 to fix the stop block 6 and the connecting supports 4. The distance between the two side end faces of the stop block 6 is not less than the distance between the outer surfaces of the two outer shear plates 1. The cross-sectional width of the stop block 6 is less than the cross-sectional width of the first stop holes 13 and the second stop holes 22, so that a certain space is reserved to allow the two stop blocks 6 to move towards each other. In the initial state, the outer side of the stop block 6 inside the first stop holes 13 and the second stop holes 22 is in contact, so that the tendency of the two stop blocks 6 to move away from each other is restrained.
[0031] The two ends of the elastic bending piece 5 are hingedly connected with the two connecting supports 4 respectively. The elastic bending piece 5 comprises a bending plate 51, and the two ends of the bending plate 51 are provided with hinge parts 52. The bending plate 51 is made of a steel plate, and the hinge parts 52 are integrally formed with the bending plate 51 or are welded at the ends of the bending plate 51. The connecting supports 4 are provided with hinge grooves 42 matched with the hinge parts 52. In the embodiment, the cross sections of the hinge parts 52 and the hinge grooves 42 are circular.
[0032] The outer side of the outer shear plate 1 is provided with a protruding block 14 between the two first stop holes 13. The height of the protruding block 14 is equal to the minimum distance from the bending plate 51 to the outer shear plate 1, so as to prevent the bending plate 51 from bending inwardly when being stressed.
[0033] The outer shear plate 1 is provided with a plurality of third through holes 12, and the connecting plate 3 is provided with a plurality of fourth through holes 31 corresponding to the third through holes 12. The connecting plate 3 and the outer shear plate 1 are connected through high-strength bolts 8 at the corresponding third through holes 12 and fourth through holes 31.
[0034] Working principle
[0035] When the damper is sheared, i.e. the relative shearing deformation between the inner shearing plate 2 and the connecting plate 3 occurs, the elastic buckling piece 5 will be compressed to generate a restoring force regardless of the deformation direction. When the compression load exceeds the critical value, the buckling plate 51 will lose stability and be bent, and the buckling plate 51 will only be bent outwardly due to the constraint of the protruding block 14 on the outer shearing plate 1, and the load-bearing capacity-compression deformation relationship will enter the nonlinear stage, but since the buckling plate 51 does not yield, it can return to the initial position after unloading, thereby realizing the self-resetting mechanism. On the other hand, when the damper is sheared, the friction plate and the inner shearing plate 2 will slip to consume part of the seismic energy and improve the energy dissipation capacity of the damper, thereby realizing the overall working mechanism of self-resetting and energy dissipation.
[0036] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A buckling-restrained damper characterized by, The shear plate comprises an inner shear plate, a connecting plate, a stop block, a connecting support, an elastic bending piece and two outer shear plates, the two outer shear plates are symmetrically arranged on both sides of the outer shear plate and the connecting plate, a friction plate is arranged between the inner shear plate and the outer shear plate, the outer shear plate is provided with two first stop holes, the inner shear plate is provided with second stop holes corresponding to the two first stop holes respectively, the stop block passes through the first stop hole and the second stop hole and is fixedly connected with the connecting support, and the elastic bending piece is hingedly connected with the two connecting supports at two ends thereof.
2. The buckle self-resetting damper of claim 1, wherein, The length and width of the first stop hole and the second stop hole are completely same, and the edge projection of the first stop hole and the second stop hole is coincident.
3. The buckle self-resetting damper of claim 2, wherein, The distance between the two side end faces of the stop block is not less than the distance between the outer surfaces of the two outer shear plates.
4. The buckle self-resetting damper of claim 3, wherein, The cross-sectional width of the stop block is less than the cross-sectional width of the first stop hole and the second stop hole.
5. The buckle self-resetting damper of claim 1, wherein, Each stop block is connected with the connecting support at two ends thereof through a bolt.
6. The buckle self-resetting damper of claim 1, wherein, The elastic bending piece comprises a bending plate, the two ends of the bending plate are provided with hinging portions, and the connecting support is provided with a hinging groove matched with the hinging portion.
7. The buckle self-resetting damper of claim 6, wherein, The outer side of the outer shear plate is provided with a protruding block between the two first stop holes, and the height of the protruding block is equal to the minimum distance from the bending plate to the outer shear plate.
8. The buckle self-resetting damper of claim 1, wherein, Two friction plates are arranged between each outer shear plate and the inner shear plate, and the two friction plates are symmetrically arranged above and below the elastic bending piece.
9. The buckle self-resetting damper of claim 8, wherein, The friction plate, the inner shear plate and the outer shear plate are connected through a bolt, the friction plate is provided with a first through hole, the outer shear plate is provided with a second through hole, and the inner shear plate is provided with a sliding groove hole, the bolt for fastening the friction plate is arranged in the first through hole, the second through hole and the sliding groove hole.
10. The buckle self-resetting damper of claim 1, wherein, The outer shear plate is provided with a plurality of third through holes, the connecting plate is provided with a plurality of fourth through holes corresponding to the third through holes, and the connecting plate and the outer shear plate are connected through bolts at the corresponding third through holes and fourth through holes.