A post-yield large stiffness energy dissipation bearing

Abstract

The application belongs to the technical field of anti-seismic structure, and specifically discloses a post-yield large-rigidity energy dissipation shock-reducing support which comprises a supporting part, an energy dissipation part and a resetting part. The supporting part comprises two plate bodies and a buffer deformation piece, and the two plate bodies form a buffer gap, and the buffer deformation piece is arranged in the buffer gap. The energy dissipation part comprises a bottom plate, a U-shaped plate and a first push plate, the bottom plate is connected with one of the plate bodies; the U-shaped plate comprises a first flat plate, an arc plate and a second flat plate, the first flat plate is arranged on the bottom plate, the arc plate is made of a memory alloy, the second flat plate and the arc plate and the first flat plate form a U-shaped structure, the first push plate is arranged on the second flat plate, and the first push plate is arranged on the other plate body. The resetting part has a fixed end and a deformation end, the fixed end is connected with the bottom plate of the corresponding energy dissipation part, and the deformation end is connected with the first push plate of the energy dissipation part. The application precisely solves the shortcomings of traditional shock-reducing devices in energy dissipation efficiency, deformation control and resetting capacity, and realizes efficient unification of the three.

Description

Technical Field

[0001] This invention belongs to the field of seismic structure technology, and specifically relates to a post-buckling high stiffness energy dissipation and vibration reduction bearing. Background Technology

[0002] Under near-fault pulse earthquakes, traditional seismic isolation devices become less efficient and struggle to cope with large pulse displacements, leading to damage such as beam detachment and collisions. Therefore, developing multifunctional seismic isolation devices that combine high energy consumption, large deformation, and strong post-earthquake recovery is a powerful means to improve the seismic toughness of near-fault bridges.

[0003] Traditional seismic isolation devices generally have shortcomings in coordinating energy dissipation efficiency, deformation control, and recovery capability. For example, traditional movable bearings such as sliding rubber bearings often have low energy dissipation levels, easily causing excessive displacement or even collapse of the superstructure under strong earthquakes, and post-earthquake recovery is difficult, seriously affecting the structural functional recovery. Lead-core rubber bearings and high-damping rubber bearings have good energy dissipation characteristics, but their insufficient stiffness after yielding makes them unable to withstand the impact displacement of strong earthquakes, and they also lack a self-resetting mechanism. Triangular plate or X-shaped steel dampers have excellent energy dissipation performance, but their recovery capability is weak and they have stringent requirements for vertical installation space. Viscous dampers are limited by weak limiting capability and difficulty in post-earthquake recovery, making it difficult to meet multi-directional seismic isolation requirements. Shape memory alloy devices, which have received much attention in recent years, have both energy dissipation and recovery characteristics, but their mechanical properties are sensitive to temperature changes, resulting in limited actual energy dissipation efficiency. In addition, their high cost severely restricts their engineering application and promotion. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this invention is to provide a high-stiffness energy-dissipating and vibration-damping bearing after buckling.

[0005] The technical solution of the present invention is: a high stiffness energy-dissipating and vibration-damping bearing after buckling, comprising a support part, an energy-dissipating part, and a reset part.

[0006] The support includes two plates and a buffer deformation member. The two plates are distributed opposite to each other and form a buffer gap. The two plates are connected to the upper and lower parts of the structural isolation layer in a one-to-one correspondence. The buffer deformation member is set in the buffer gap.

[0007] The energy-consuming part includes a base plate, a U-shaped plate, and a first push plate. The base plate is connected to one of the plates. The U-shaped plate includes a first flat plate, an arc plate, and a second flat plate. The first flat plate is set on the base plate. One end of the arc plate is fixed to the end of the first flat plate away from the plate. The arc plate is made of shape memory alloy. The second flat plate is parallel to the first flat plate and is set at the other end of the arc plate. The second flat plate, the arc plate, and the first flat plate form a U-shaped structure. The first push plate is set on the second flat plate. One end of the first push plate is slidably set on another plate along a direction perpendicular to the length of the second flat plate.

[0008] The reset part is an elastic deformation structure with a fixed end and a deformation end. The fixed end is connected to the base plate of the corresponding energy-consuming part, and the deformation end is connected to the first push plate of the energy-consuming part.

[0009] When a strong earthquake occurs, the two plates connected to the structural isolation layer are affected by the seismic energy and undergo relative displacement, which in turn causes the bottom plate and the first push plate to undergo relative displacement. The arc plate continuously deforms to dissipate energy, and the deformation end of the reset part also deforms to dissipate energy. When the seismic energy of the strong earthquake is dissipated, the deformation end of the reset part resets and drives the first push plate to reset.

[0010] Furthermore, the energy-consuming part and the reset part constitute an energy-dissipating part, and there are multiple sets of energy-dissipating parts, which are circumferentially distributed around the support part.

[0011] Furthermore, the plate is a rectangular plate with four sets of energy dissipation sections, which are respectively arranged on the four sides of the plate.

[0012] Furthermore, the energy-consuming part also includes a limiting plate. There are two limiting plates, which are distributed opposite to each other and are both vertically set on the base plate. Each of the two limiting plates has a limiting groove at the end of its opposite side away from the base plate, and the first push plate is slidably locked in the limiting groove.

[0013] Furthermore, a connecting plate is provided on the side of the limiting plate near the plate body, and the connecting plate is fixed to the plate body connected to the base plate.

[0014] Furthermore, the energy-consuming part also includes a guide rail, which is fixed on another plate and has a T-shaped groove; the first push plate has a T-shaped slider at one end near the plate, and the T-shaped slider is slidably disposed in the T-shaped groove.

[0015] Furthermore, each group of energy-consuming parts corresponds to two groups of reset parts, and the two groups of reset parts are distributed on both sides of the corresponding energy-consuming part.

[0016] Furthermore, the energy-consuming part also includes a pusher frame, of which there are two, which are distributed opposite to each other and are both fixed to the first pusher plate.

[0017] The reset part includes a fixed end plate, a guide post, a disc spring, and a second push plate. There are two fixed end plates, which are distributed opposite each other and fixed to the base plate. The guide post is fixed between the two fixed end plates. The disc spring is sleeved on the guide post. There are two second push plates, which are sleeved on the guide post and located at both ends of the disc spring. The two second push plates are located between the two push frames and the second push plates are in contact with the push frames one by one.

[0018] Furthermore, the first flat plate, the arc plate, and the second flat plate are an integral structure, all made of iron-based shape memory alloy or nickel-titanium shape memory alloy.

[0019] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention, through a coordinated design of three parts—support, energy dissipation, and reset—precisely solves the shortcomings of traditional seismic isolation and damping devices in terms of energy dissipation efficiency, deformation control, and reset capability, achieving a highly efficient unity of these three aspects. Specifically, the core energy dissipation part uses a shape memory alloy arc plate, which efficiently dissipates seismic energy during deformation, solving the problem of low energy dissipation in traditional supports; moreover, the U-shaped structure maintains high stiffness after buckling, limiting excessive displacement under strong earthquakes and avoiding the risk of "post-buckling instability" associated with lead-core supports. The reset part's elastic element actively drives reset, with the shape memory alloy arc plate assisting in reset, completely solving the problem of "difficult reset after earthquake" in traditional dampers. The support part's buffer component, in conjunction with a sliding push plate, can cope with multi-directional seismic impacts, overcoming the shortcomings of viscous dampers such as "weak limiting and difficulty in adapting to multi-directional damping." Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a partial exploded view of the structure of the present invention;

[0022] Figure 3 This is a partial exploded view of the energy-consuming part of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the reset part of the present invention;

[0024] Figure 5 This is a partial structural schematic diagram of the reset part of the present invention;

[0025] Figure 6 This is a diagram showing the structural changes of the two plates of this invention when they undergo unidirectional displacement.

[0026] Figure 7 This is a diagram showing the structural changes when the two plates of this invention undergo bidirectional displacement.

[0027] Among them, 1-support part, 11-plate body, 12-buffer deformation part, 2-energy dissipation part, 21-base plate, 22-U-shaped plate, 221-first flat plate, 222-arc plate, 223-second flat plate, 23-first push plate, 230-T-shaped slider, 24-limiting plate, 240-limiting groove, 241-connecting plate, 25-guide rail, 250-T-shaped slide groove, 26-push frame, 3-reset part, 31-fixed end plate, 32-guide column, 33-disc spring, 34-second push plate. Detailed Implementation

[0028] The following is combined Figures 1 to 7The specific embodiments of the present invention will be described in detail below. In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are 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 are not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] Example

[0031] like Figure 1 , Figure 2 The buckling high stiffness energy dissipation and damping bearing shown includes a support part 1, an energy dissipation part 2, and a reset part 3.

[0032] The support 1 includes two plates 11 and a buffer deformation member 12. The two plates 11 are distributed opposite to each other and form a buffer gap. The two plates 11 are connected to the upper and lower parts of the structural isolation layer in a one-to-one correspondence. The buffer deformation member 12 is disposed in the buffer gap.

[0033] like Figure 3 As shown, the energy-consuming part 2 includes a base plate 21, a U-shaped plate 22, and a first push plate 23. The base plate 21 is connected to one of the plates 11. The U-shaped plate 22 includes a first flat plate 221, an arc plate 222, and a second flat plate 223. The first flat plate 221 is disposed on the base plate 21. One end of the arc plate 222 is fixed to the end of the first flat plate 221 away from the plate 11. The arc plate 222 is made of shape memory alloy. The second flat plate 223 is parallel to the first flat plate 221 and is disposed at the other end of the arc plate 222. The second flat plate 223, the arc plate 222, and the first flat plate 221 form a U-shaped structure. The first push plate 23 is disposed on the second flat plate 223. One end of the first push plate 23 is slidably disposed on another plate 11 along a direction perpendicular to the length of the second flat plate 223. The base plate 21 is fixed to the plate 11 by bolts, the first flat plate 221 is fixed to the base plate 21 by bolts, and the second flat plate 223 is fixed to the first push plate 23 by bolts.

[0034] The reset part 3 is an elastic deformation structure with a fixed end and a deformation end. The fixed end is connected to the base plate 21 of the corresponding energy-consuming part 2, and the deformation end is connected to the first push plate 23 of the energy-consuming part 2.

[0035] When a strong earthquake occurs, the two plates 11 connected to the structural isolation layer are affected by the seismic energy and undergo relative displacement, which in turn causes the bottom plate 21 and the first push plate 23 to undergo relative displacement. The arc plate 222 continuously deforms to dissipate energy, and the deformation end of the reset part 3 deforms to dissipate energy. When the seismic energy of the strong earthquake is dissipated, the deformation end of the reset part 3 resets and drives the first push plate 23 to reset.

[0036] In this embodiment, the buffer deformation component 12 includes a rubber plate, a steel pad, and a PTFE plate connected in sequence. The rubber plate is fixed to a plate 11 connected to the base plate 21, and the PTFE plate is fixed to another plate 11. It should be noted that the support part 1 can also be replaced by commercially available plate rubber bearings, pot rubber bearings, ball steel bearings, high-damping rubber bearings, lead-core rubber bearings, and friction pendulum bearings, which can be selected in actual use.

[0037] Preferably, the energy-consuming part 2 and the reset part 3 constitute an energy-dissipating part, and there are multiple sets of energy-dissipating parts, which are circumferentially distributed around the support part 1.

[0038] Preferably, the plate 11 is a rectangular plate with four sets of energy dissipation parts, which are respectively arranged on the four sides of the plate 11.

[0039] Preferably, the energy-consuming part 2 further includes a limiting plate 24. There are two limiting plates 24, which are distributed opposite to each other and are both vertically arranged on the base plate 21. Each of the two limiting plates 24 has a limiting groove 240 at the end of its opposite side away from the base plate 21, and the first push plate 23 is slidably locked in the limiting groove 240.

[0040] Preferred, such as Figure 2 , Figure 3 As shown, a connecting plate 241 is also provided on the side of the limiting plate 24 near the plate body 11. The connecting plate 241 is fixed to the plate body 11 connected to the base plate 21. The connecting plate 241 is fixed to the limiting plate 24 by bolts and welded to the plate body 11.

[0041] Preferred, such as Figure 2 , Figure 3 As shown, the energy-consuming part 2 also includes a guide rail 25, which is fixed on another plate 11. The guide rail 25 has a T-shaped groove 250. The first push plate 23 is provided with a T-shaped slider 230 at one end near the plate 11. The T-shaped slider 230 is slidably disposed in the T-shaped groove 250.

[0042] Preferably, each group of energy-consuming parts 2 corresponds to two groups of reset parts 3, and the two groups of reset parts 3 are distributed on both sides of the corresponding energy-consuming parts 2.

[0043] Preferably, the energy-consuming part 2 also includes a pusher 26. There are two pushers 26, which are distributed opposite to each other and are both fixed on the first pusher plate 23.

[0044] like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, the reset part 3 includes a fixed end plate 31, a guide post 32, a disc spring 33, and a second push plate 34. There are two fixed end plates 31, which are oppositely distributed and fixed to the base plate 21. The guide post 32 is fixed between the two fixed end plates 31. The disc spring 33 is sleeved on the guide post 32. There are two second push plates 34, sleeved on the guide post 32, located at opposite ends of the disc spring 33. The two second push plates 34 are located between the two push frames 26, and each push plate 34 contacts a push frame 26 in a corresponding manner. The disc spring 33 can also be replaced by a tension spring or a compression spring. The fixed end plate 31 is welded to the base plate 21.

[0045] Preferably, the first plate 221, the arc plate 222, and the second plate 223 are an integral structure, all made of iron-based shape memory alloy or nickel-titanium shape memory alloy. This embodiment uses iron-based shape memory alloy.

[0046] The working principle of the above embodiments is as follows:

[0047] Under strong earthquake action, the two plates 11 only undergo unidirectional displacement. Taking the planar lateral displacement as an example: Figure 6 As shown, after the two plates 11 undergo relative lateral displacement, the guide rail 25 pushes the T-shaped slider 230 and causes the first push plate 23 to move together. The first flat plate 221 moves with the first push plate 23, and the arc plate 222 continuously bends and deforms to dissipate energy, while the vertical T-shaped slider 230 slides within the guide rail 25. During this process, only the two sets of energy dissipation parts 2 and the four sets of reset parts 3 corresponding to the lateral displacement are subjected to vibrational energy. The four sets of reset parts 3 corresponding to the lateral displacement are pushed by the push frame 26 to dissipate energy: the first push plate 23 moves, causing the push frame 26 to move, and the push frame 26 moves, causing the second push plate 34 on one side of the disc spring 33 to push the disc spring 33 to achieve compression deformation. The disc spring 33 dissipates energy through compression deformation. The second push plate 34 on the other side of the disc spring 33 is not squeezed by the push frame 26, so it does no work. After the energy dissipation is completed, it is subjected to the reverse movement of the disc spring 33 to achieve the reset of each component.

[0048] Under strong earthquake, the two plates 11 undergo bidirectional displacement: as follows Figure 7 As shown, the two plates 11 undergo bidirectional longitudinal and transverse displacement, and the four sets of energy dissipation parts 2 and the eight sets of reset parts 3 in both the longitudinal and transverse directions are subjected to vibrational energy. The operating principles of the energy dissipation parts 2 and the reset parts 3 are the same as above.

[0049] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A post-yield large stiffness energy dissipation bearing, characterized in that, include: The support (1) includes: two plates (11) distributed opposite to each other and forming a buffer gap, the two plates (11) being connected one-to-one with the upper and lower parts of the structural isolation layer; and a buffer deformation member (12) disposed in the buffer gap. The energy-consuming part (2) includes: a base plate (21) connected to one of the plates (11); a U-shaped plate (22) including: a first flat plate (221) disposed on the base plate (21); an arc plate (222) with one end fixed to the end of the first flat plate (221) away from the plate (11), the arc plate (222) being a shape memory alloy; a second flat plate (223) parallel to the first flat plate (221) and disposed at the other end of the arc plate (222), the second flat plate (223) forming a U-shaped structure with the arc plate (222) and the first flat plate (221); a first push plate (23) disposed on the second flat plate (223), one end of the first push plate (23) slidingly disposed on another plate (11) in a direction perpendicular to the length of the second flat plate (223); The reset part (3) is an elastic deformation structure with a fixed end and a deformation end. The fixed end is connected to the bottom plate (21) of the corresponding energy-consuming part (2), and the deformation end is connected to the first push plate (23) of the energy-consuming part (2). When a strong earthquake occurs, the two plates (11) connected to the structural isolation layer are affected by the seismic energy and undergo relative displacement, which in turn causes the bottom plate (21) and the first push plate (23) to undergo relative displacement. The arc plate (222) continuously deforms to dissipate energy, and the deformation end of the reset part (3) deforms to dissipate energy. When the seismic energy of the strong earthquake is dissipated, the deformation end of the reset part (3) resets and causes the first push plate (23) to reset. The energy-consuming part (2) and the reset part (3) constitute an energy-dissipating part. There are multiple sets of energy-dissipating parts, which are circumferentially distributed around the support part (1). The plate (11) is a rectangular plate with four sets of energy dissipation parts, which are respectively arranged on the four sides of the plate (11). The energy-consuming part (2) also includes a limiting plate (24). There are two limiting plates (24), which are distributed opposite to each other and are both vertically set on the base plate (21). The two limiting plates (24) are provided with a limiting groove (240) at the opposite side of the base plate (21), and the first push plate (23) is slidably locked in the limiting groove (240). The limiting plate (24) is also provided with a connecting plate (241) on the side near the plate body (11), and the connecting plate (241) is fixed on the plate body (11) connected to the bottom plate (21); The energy-consuming part (2) also includes a guide rail (25), which is fixed on another plate (11). The guide rail (25) has a T-shaped groove (250). The first push plate (23) is provided with a T-shaped slider (230) at one end near the plate (11). The T-shaped slider (230) is slidably disposed in the T-shaped groove (250).

2. The back flexural stiffness energy dissipation bearing according to claim 1, wherein, Each set of energy-consuming parts (2) corresponds to two sets of reset parts (3), and the two sets of reset parts (3) are distributed on both sides of the corresponding energy-consuming parts (2).

3. The high back flexural stiffness energy-dissipating seismic isolation bearing of claim 2, wherein, The energy consumption part (2) further comprises two push frames (26) oppositely distributed and fixed on the first push plate (23); The reset part (3) comprises: Two fixed end plates (31) oppositely distributed and fixed on the bottom plate (21); A guide column (32) fixed between the two fixed end plates (31); A disc spring (33) sleeved on the guide column (32); Two second push plates (34) sleeved on the guide column (32) and located at two ends of the disc spring (33) respectively, the two second push plates (34) being located between the two push frames (26) and corresponding to the push frames (26) in contact.

4. The reduced-yield energy dissipation bearing of claim 1, wherein, The first flat plate (221), the arc plate (222) and the second flat plate (223) are an integral structure and are made of iron-based shape memory alloy or nickel-titanium shape memory alloy.

Images