Bending high-rigidity energy dissipation and seismic mitigation support

Abstract

The invention belongs to the technical field of anti-seismic structures, and particularly discloses a post-bending high-rigidity energy-dissipation damping support which comprises a supporting part, an energy-dissipation part and a reset part. The supporting part comprises two plate bodies and a buffering deformation piece, the two plate bodies form a buffering gap, and the buffering deformation piece is arranged in the buffering gap. The energy consumption part comprises a bottom plate, a U-shaped plate and a first push plate, and the bottom plate is connected with one plate body; 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 memory alloy, the second flat plate, 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 second push plate is arranged on the other plate body. The reset part is provided with a fixed end and a deformation end, the fixed end is connected with the bottom plate of the corresponding energy consumption part, and the deformation end is connected with the first push plate of the energy consumption part. The problem that a traditional shock absorption and isolation device is short in energy consumption efficiency, deformation control and reset capacity is accurately solved, and efficient unification of the three is achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of anti-seismic structure, and particularly relates to a post-yield large-stiffness energy dissipation bearing. BACKGROUND

[0002] In recent decades, many destructive earthquakes have occurred, such as the 1995 Kobe earthquake (7.2 magnitude) in Japan, the 1999 Jiji earthquake (7.6 magnitude) in Taiwan, China, the 2008 Wenchuan earthquake (8.0 magnitude) in China, the 2021 Mado earthquake (7.4 magnitude) in Qinghai, China, and the 2023 Turkey-Syria earthquake (7.8 magnitude). These strong earthquakes not only caused a large number of casualties, but also caused serious damage to buildings and bridges near the fault. After the 2008 Wenchuan earthquake, China entered a new round of seismic activity, and several strong earthquakes caused serious damage to bridges near the fault. In the current and future long period, China faces the problem of strong earthquake safety of bridges near the fault. Under the action of near-fault pulse earthquakes, the efficiency of traditional seismic mitigation devices decreases, and it is difficult to cope with pulse large displacement, which leads to beam body falling and collision and other seismic hazards. Therefore, the development of multifunctional seismic mitigation devices with high energy dissipation, large deformation and strong post-earthquake reset is a powerful means to improve the seismic toughness of bridges near the fault.

[0003] Traditional seismic mitigation devices generally have short boards in terms of coordination of energy dissipation efficiency, deformation control and reset ability. For example, traditional movable bearings such as sliding plate rubber bearings often have low energy dissipation level, and are prone to excessive displacement of the upper structure under strong earthquake action, even falling and damaging, and are difficult to reset after an earthquake, which seriously affects the recovery of structural function; lead rubber bearings and high-damping rubber bearings have good energy dissipation characteristics, but are difficult to resist strong earthquake impact displacement due to insufficient post-yield stiffness, and lack a self-reset mechanism; triangular plate or X-shaped steel damper has excellent energy dissipation performance, but has weak reset ability and strict requirements for vertical installation space; viscous damper is limited by weak limiting ability and difficulty in post-earthquake reset, and is difficult to meet the demand of multi-directional seismic mitigation. In recent years, shape memory alloy devices have attracted much attention due to their energy dissipation and reset characteristics, but their mechanical properties are sensitive to temperature changes, and the actual energy dissipation efficiency is limited, which seriously restricts the engineering application and popularization. SUMMARY

[0004] In view of the above problems, the purpose of the present application is to provide a post-yield large-stiffness energy dissipation bearing.

[0005] The technical solution of the present application is: a post-yield large-stiffness energy dissipation bearing, comprising a support part, an energy dissipation part and a reset part.

[0006] The support part comprises two plate bodies and a buffer deformation piece, the two plate bodies are oppositely distributed and form a buffer gap, and the two plate bodies are connected with the upper part and the lower part of the structure seismic isolation layer one by one; the buffer deformation piece is arranged in the buffer gap.

[0007] 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; one end of the arc plate is fixed to the end of the first flat plate away from the plate body, the arc plate is made of memory alloy; the second flat plate is parallel to the first flat plate and is arranged 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 arranged on the second flat plate, and one end of the first push plate is slidingly arranged on the other plate body in a direction perpendicular to the length of the second flat plate.

[0008] The reset part is an elastic deformation structure and 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.

[0009] When a strong earthquake occurs, the two plate bodies connected with the structure isolation layer are relatively displaced under the influence of seismic energy, the bottom plate and the first push plate are relatively displaced, the arc plate is continuously deformed to dissipate energy, and the deformation end of the reset part is deformed to dissipate energy; when the seismic energy of the strong earthquake is consumed, the deformation end of the reset part resets and drives the first push plate to reset.

[0010] Further, the energy dissipation part and the reset part form an energy dissipation part, and the energy dissipation part has a plurality of groups, and the plurality of groups of energy dissipation parts are distributed circumferentially around the support part.

[0011] Still further, the plate body is a rectangular plate body, the energy dissipation part has four groups, and the four groups of energy dissipation parts are respectively and one by one arranged on the four edges of the plate body.

[0012] Still further, the energy dissipation part further comprises a limiting plate, the limiting plate has two limiting plates, the two limiting plates are oppositely distributed and are both vertically arranged on the bottom plate; one end of the opposite side of the two limiting plates away from the bottom plate is provided with a limiting groove, and the first push plate is slidingly arranged in the limiting groove.

[0013] Still further, the side of the limiting plate close to the plate body is further provided with a connecting plate, and the connecting plate is fixed to the plate body connected with the bottom plate.

[0014] Still further, the energy dissipation part further comprises a guide rail, the guide rail is fixed to the other plate body, and the guide rail has a T-shaped sliding groove; one end of the first push plate close to the plate body is provided with a T-shaped sliding block, and the T-shaped sliding block is slidingly arranged in the T-shaped sliding groove.

[0015] Still further, each group of the energy dissipation part corresponds to two groups of reset parts, and the two groups of reset parts are distributed on the two sides of the corresponding energy dissipation part.

[0016] Still further, the energy dissipation part further comprises a pushing frame, the pushing frame has two pushing frames, and the two pushing frames are oppositely distributed and are both fixed to the first push 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; Figure 2 This is a partial exploded view of the structure of the present invention; Figure 3 This is a partial exploded view of the energy-consuming part of the present invention; Figure 4 This is a schematic diagram of the structure of the reset part of the present invention; Figure 5 This is a partial structural schematic diagram of the reset part of the present invention; Figure 6 This is a diagram showing the structural changes of the two plates of this invention when they undergo unidirectional displacement. Figure 7 This is a diagram showing the structural changes when the two plates of this invention undergo bidirectional displacement.

[0021] 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

[0022] The following is combined Figures 1 to 7 The 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.

[0023] 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.

[0024] Example 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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 part 2.

[0036] Preferably, the energy-consuming part 2 also includes a pusher frame 26. There are two pusher frames 26, which are distributed opposite to each other and are both fixed on the first push plate 23.

[0037] 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.

[0038] 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.

[0039] The working principle of the above embodiments is as follows: 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.

[0040] 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.

[0041] 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 high-stiffness energy-dissipating and vibration-damping bearing after buckling, 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 consumed, the deformation end of the reset part (3) resets and drives the first push plate (23) to reset.

2. The high-stiffness energy-dissipating and vibration-damping bearing with high post-buckling stiffness as described in claim 1, characterized in that, 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).

3. The high-stiffness energy-dissipating and vibration-damping bearing after buckling as described in claim 2, characterized in that, 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).

4. The high-stiffness energy-dissipating and vibration-damping bearing after buckling as described in claim 3, characterized in that, 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 away from the base plate (21), and the first push plate (23) is slidably locked in the limiting groove (240).

5. A high-stiffness energy-dissipating and vibration-damping bearing with high post-buckling stiffness as described in claim 4, characterized in that, 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).

6. A high-stiffness energy-dissipating and vibration-damping bearing with high post-buckling stiffness as described in claim 5, characterized in that, 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).

7. A high-stiffness energy-dissipating and vibration-damping bearing with high post-buckling stiffness as described in claim 2, characterized in that, 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).

8. A high-stiffness energy-dissipating and vibration-damping bearing with high post-buckling stiffness as described in claim 7, characterized in that, The energy-consuming part (2) also includes a pusher (26), there are two pushers (26), the two pushers (26) are distributed opposite to each other and are fixed on the first push plate (23); The reset part (3) includes: There are two fixed end plates (31), which are distributed opposite to each other and are fixed on the base plate (21); The guide post (32) is fixed between two fixed end plates (31); Disc spring (33) is sleeved on guide post (32); There are two second push plates (34), which are sleeved on the guide post (32) and located at both ends of the disc spring (33). The two second push plates (34) are located between the two push frames (26) and the second push plates (34) and push frames (26) are in contact with each other.

9. A high-stiffness energy-dissipating and vibration-damping bearing with high post-buckling stiffness as described in claim 1, characterized in that, The first plate (221), the arc plate (222), and the second plate (223) are an integral structure, all of which are made of iron-based shape memory alloy or nickel-titanium shape memory alloy.

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