Buckling self-resetting damper

Abstract

The invention provides a buckling self-resetting damper which comprises an inner shear plate, a connecting plate, a stop block, a connecting support, an elastic buckling piece and two outer shear plates, and the two outer shear plates are symmetrically arranged on the two sides of the outer shear plates and the connecting plate; a friction plate is arranged between the internal shear plate and the external shear plate, two first stop holes are formed in the external shear plate, second stop holes corresponding to the two first stop holes respectively are formed in the internal shear plate, and stop blocks penetrate through the first stop holes and the second stop holes and are fixedly connected with the connecting support. The two ends of the elastic buckling piece are hinged to the two connecting supports respectively. And the connecting plate is fixedly connected with the two external shear plates. According to the scheme, the nonlinear elastic behavior shown by the elastic buckling piece which is pressed and buckled is used as a self-resetting mechanism of the damper, a part of energy dissipation capacity is provided with the assistance of a friction sliding energy dissipation mechanism, and therefore the expected self-resetting-energy dissipation mechanism is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of earthquake engineering, and in particular to a buckling self-resetting damper. Background Art

[0002] Under the action of an earthquake, building structural components will enter a nonlinear stage, dissipating part of the earthquake input energy through elastic-plastic hysteresis energy dissipation, thereby controlling the maximum seismic response of the structure and preventing the structure from collapsing under a strong earthquake. Nevertheless, after the earthquake, the structure may still have a large residual deformation, that is, the structure cannot be restored to its original position, which will lead to the loss of the building's use function and increase the economic cost of post-earthquake repair, which will have a great impact on post-disaster reconstruction and the restoration of social order.

[0003] However, existing earthquake-resistant technologies still have significant limitations. Even after an earthquake, building structures often retain large residual deformations. In other words, the structure cannot be restored to its original position. This problem brings a series of serious impacts: from the perspective of building use function, residual deformation will cause changes in the building space, affect the normal use of various facilities inside the building, and may even make some areas unable to be used normally, resulting in the loss of building use function. From the perspective of economic cost, large residual deformation means that post-earthquake repair work requires more manpower, material and financial resources, including reinforcement of the structure, repair of deformed parts, 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 connection structure or device that can effectively solve the problem of structural residual deformation to improve the recoverability of building structures after earthquakes. Summary of the invention

[0004] The object of the present invention is to provide a buckling self-resetting damper for improving the recoverability of a building after an earthquake, reducing its post-earthquake repair cost, and improving the seismic toughness of the building.

[0005] The present invention provides a flexure self-resetting damper, comprising an internal shear plate, a connecting plate, a stop block, a connecting support, an elastic flexure piece and two external shear plates, wherein the two external shear plates are symmetrically arranged on both 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 respectively corresponding to the two first stop holes, the stop block passes through the first stop hole and the second stop hole and is fixedly connected to the connecting support, and the two ends of the elastic flexure piece are respectively hinged to the two connecting supports; the connecting plate is fixedly connected to the two external shear plates.

[0006] Further, the length and width of the first stopping hole are exactly the same as those of the second stopping hole, and edge projections of the first stopping hole and the second stopping hole overlap.

[0007] Furthermore, the distance between the end surfaces on both sides of the stop block is not less than the distance between the outer surfaces of the two outer shear plates.

[0008] Further, a cross-sectional width of the stopping block is smaller than a cross-sectional width of the first stopping hole and the second stopping hole.

[0009] Furthermore, each of the stop blocks is connected to the connecting supports at both ends thereof by bolts.

[0010] Furthermore, the elastic flexure member comprises a flexure plate, both ends of the flexure plate are provided with hinged parts, and the connecting support is provided with a hinged groove matched with the hinged part.

[0011] Furthermore, a protruding block is provided on the outer side of the external shear plate between the two first stop holes, and the height of the protruding block is equal to the minimum distance from the buckling plate to the external shear plate.

[0012] Furthermore, two friction plates are provided between each of the outer shear plates and the inner shear plates, and the two friction plates are symmetrically arranged on the upper and lower sides of the elastic buckling member.

[0013] Furthermore, the friction plate, the internal shear plate and the external shear plate are fastened together by bolts, a first through hole is provided on the friction plate, a second through hole is provided on the external shear plate, and a slide slot hole is provided on the internal shear plate, and bolts for fastening the friction plate are inserted into the first through hole, the second through hole and the slide slot hole.

[0014] Furthermore, the external 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 external shear plate are connected by bolts at the corresponding third through holes and fourth through holes.

[0015] The beneficial effect of this technical solution is that when the internal shear plate and the connecting plate undergo relative shear deformation, the relative position change between the first stop hole and the second stop hole will drive the two stop blocks to produce compressive deformation, thereby causing the elastic buckling unit to buckle under pressure and provide a reset force, while the friction plate and the internal shear plate undergo friction and slippage to dissipate seismic energy. It uses the nonlinear elastic behavior exhibited by the elastic buckling member under compression buckling as the self-reset mechanism of the damper, and supplemented by the friction and slip energy dissipation mechanism to provide a part of the energy dissipation capacity, thereby realizing the expected self-reset-energy dissipation mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the appearance of the buckling self-resetting damper in the present invention.

[0018] Figure 2 It is a schematic diagram of the explosion of the buckling self-resetting damper in the present invention.

[0019] Figure 3 Schematic diagram of the external shear plate.

[0020] Figure 4 Schematic diagram of the internal shear plate.

[0021] Figure 5 Schematic diagram of the connecting support.

[0022] Figure 6 Schematic diagram of an elastic buckling member.

[0023] Figure 7 Schematic diagram of the working mechanism of the buckling self-resetting damper.

[0024] Explanation of the accompanying drawings: 1-external shear plate, 11-second through hole, 12-third through hole, 13-first stop hole, 14-protruding block, 2-internal shear plate, 21-slide 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 solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, 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 connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1

[0029] like Figure 1-Figure 7 As shown, the present invention provides a buckling self-resetting damper, comprising an internal shear plate 2, a connecting plate 3, a stop block 6, a connecting support 4, an elastic buckling member 5 and two external shear plates 1, the two external shear plates 1 are symmetrically arranged on both sides of the external shear plate 1 and the connecting plate 3; two friction plates 7 are arranged between the internal shear plate 2 and the two external shear plates 1, and the two friction plates 7 are symmetrically arranged on the upper and lower sides of the elastic buckling member 5. The friction plate 7, the internal shear plate 2 and the external shear plate 1 are fastened and connected by high-strength bolts 8, a first through hole 71 is provided on the friction plate 7, a second through hole 11 is provided on the external shear plate 1, and a slide slot hole 21 is provided on the internal shear plate 2, and the high-strength bolts 8 for fastening the friction plate 7 are inserted into the first through hole 71, the second through hole 11 and the slide slot hole 21, and the high-strength bolts 8 are used to apply pre-tightening force to the external shear plate 1, the internal shear plate 2 and the friction plate 7.

[0030] The external shear plate 1 is provided with two first stop holes 13, and the internal 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 hole 13 and the second stop hole 22 are exactly the same, and the edge projections of the first stop hole 13 and the second stop hole 22 coincide with each other; the stop block 6 passes through the first stop hole 13 and the second stop hole 22 and is fixedly connected to the connecting support 4 at both ends thereof by high-strength bolts 8, the connecting support 4 is 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 stop block 6 is fixed to the connecting support 4 by high-strength bolts 8 penetrating the fifth through holes 41 and the sixth through holes 61, wherein: the distance between the end faces on both sides of the stop block 6 is not less than the spacing between the outer surfaces of the two external shear plates 1; the cross-sectional width of the stop block 6 is less than the cross-sectional width of the first stop hole 13 and the second stop hole 22, thereby reserving a certain space to allow the two stop blocks 6 to move toward each other. In the initial state, the outer side surfaces of the first stopping hole 13 and the second stopping hole 22 of the stopping block 6 are in contact with each other, so that the backward movement tendency between the two stopping blocks 6 is restricted.

[0031] The two ends of the elastic bending member 5 are respectively hinged to the two connecting supports 4. The elastic bending member 5 includes a bending plate 51. Both ends of the bending plate 51 are provided with a hinge part 52. The bending plate 51 is made of steel plate. The hinge part 52 is integrally formed with the bending plate 51 or the hinge part 52 is welded to the end of the bending plate 51. The connecting support 4 is provided with a hinge groove 42 that cooperates with the hinge part 52. In this embodiment, the cross-sections of the hinge part 52 and the hinge groove 42 are both circular.

[0032] A protrusion 14 is provided between the two first stop holes 13 on the outer side of the external shear plate 1. The height of the protrusion 14 is equal to the minimum distance between the buckling plate 51 and the external shear plate 1 to prevent the buckling plate 51 from bending inward when subjected to force.

[0033] The external shear plate 1 is provided with a plurality of third through holes 12 , the connecting plate 3 is provided with a plurality of fourth through holes 31 corresponding to the third through holes 12 , and the connecting plate 3 and the external shear plate 1 are connected via high-strength bolts 8 at the corresponding third through holes 12 and fourth through holes 31 .

[0034] How it works

[0035] When the damper is shear-deformed, that is, when relative shear deformation occurs between the internal shear plate 2 and the connecting plate 3, the elastic buckling member 5 will be compressed regardless of the deformation direction, generating a reset force. When the compression load exceeds the critical value, the buckling plate 51 will become unstable and bend. Constrained by the protruding block 14 on the external shear plate 1, the buckling plate 51 will only bend outward, and its bearing capacity-compression deformation relationship will enter a nonlinear stage. However, since the buckling plate 51 does not yield, it can return to its initial position after unloading, thereby realizing a self-reset mechanism. On the other hand, when the damper is shear-deformed, friction slip occurs between the friction plate and the internal shear plate 2, thereby consuming part of the seismic energy and improving the energy dissipation capacity of the damper, thereby realizing the overall working mechanism of self-reset-energy dissipation.

[0036] 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. However, 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. A buckling self-resetting damper, characterized in that: It includes 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 both sides of the external shear plate and the connecting plate; a friction plate is provided 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 to the connecting support, the two ends of the elastic buckling piece are respectively hinged to the two connecting supports; the connecting plate is fixedly connected to the two external shear plates.

2. The buckling self-resetting damper according to claim 1, characterized in that: The length and width of the first stopping hole are exactly the same as those of the second stopping hole, and the edge projections of the first stopping hole and the second stopping hole overlap.

3. The buckling self-resetting damper according to claim 2, characterized in that: The distance between the end surfaces on both sides of the stop block is not less than the distance between the outer surfaces of the two outer shear plates.

4. The buckling self-resetting damper according to claim 3, characterized in that: The cross-sectional width of the stopping block is smaller than the cross-sectional widths of the first stopping hole and the second stopping hole.

5. The buckling self-resetting damper according to claim 1, characterized in that: Each of the stop blocks is connected to the connection supports at both ends thereof by bolts.

6. The buckling self-resetting damper according to claim 1, characterized in that: The elastic flexure member comprises a flexure plate, both ends of the flexure plate are provided with hinged parts, and the connecting support is provided with hinged grooves matched with the hinged parts.

7. The buckling self-resetting damper according to claim 6, characterized in that: A protruding block is provided on the outer side of the external shear plate between the two first stop holes, and the height of the protruding block is equal to the minimum distance from the buckling plate to the external shear plate.

8. The buckling self-resetting damper according to claim 1, characterized in that: Two friction plates are provided between each of the outer shear plates and the inner shear plates, and the two friction plates are symmetrically arranged on the upper and lower sides of the elastic buckling member.

9. The buckling self-resetting damper according to claim 8, characterized in that: The friction plate, the internal shear plate and the external shear plate are fastened together by bolts, a first through hole is provided on the friction plate, a second through hole is provided on the external shear plate, and a slide slot hole is provided on the internal shear plate, and bolts for fastening the friction plate are inserted into the first through hole, the second through hole and the slide slot hole.

10. The buckling self-resetting damper according to claim 1, characterized in that: The external 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 external shear plate are connected by bolts at the corresponding third through holes and fourth through holes.

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