A new type of damping shock insulation support

Abstract

The utility model discloses a novel damping shock insulation support belongs to bridge seismic technology field. The support includes upper support board, lower support board and the middle seat board among them, and through the rotating pair of integrated spherical plate and spherical slide plate, the sliding pair of plane slide plate and stainless steel plate and the comb tooth board of connecting upper and lower support board, realized the integration of shock insulation, energy consumption and spacing function. Among them, the long circular hole of upper support board can release temperature displacement, and the comb tooth board is used as metal damper and dissipates seismic energy through plastic deformation, and the breakable shear pin provided provides multistage displacement control and safety protection. The utility model discloses compact structure, effectively solved the problem of big space occupation, bridge pier size increase etc. caused by traditional support and damper split arrangement, and has multistage working performance and good maintainability simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of bridge seismic technology, specifically relating to a novel damping seismic isolation bearing. Background Technology

[0002] Whether it's a railway bridge, a highway bridge, or a pedestrian bridge, seismic resistance is one of the most important factors to consider in bridge design. Bridges should undergo seismic design and calculation, or seismic isolation and reduction design, after comprehensively considering factors such as geological conditions and seismic intensity. Improvements and reinforcements to the structural design made to prevent or mitigate earthquake damage and enhance the structure's seismic capacity are commonly referred to as seismic measures, and are essential for seismic fortification. Steel dampers are one such seismic measure.

[0003] In high-intensity seismic zones, existing arrangements typically involve using steel dampers in conjunction with seismic isolation bearings. When an earthquake strikes, the hysteretic characteristics of the steel dampers dissipate seismic energy. The bearings and dampers are installed separately, which increases the installation space for the devices and the cross-section and reinforcement of the piers.

[0004] The traditional arrangement of dampers and seismic isolation bearings often faces the following problems:

[0005] Under seismic loading, seismic isolation bearings are prone to excessive displacement, affecting structural safety. At the same time, in order to ensure the performance and limiting capacity of the bearings, they are arranged together with dampers, resulting in a generally large overall structure. In addition, such solutions usually only provide horizontal (longitudinal and transverse) limiting functions and lack effective constraints on vertical displacement. Utility Model Content

[0006] The purpose of this invention is to provide a novel damping seismic isolation bearing that can not only effectively limit the displacement amplitude of the bearing under large displacement conditions during earthquakes, but also has a vertical limiting function to achieve multi-directional safety control.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0008] A novel damping and seismic isolation bearing includes an upper bearing plate, a lower bearing plate, and a middle bearing plate disposed between the upper and lower bearing plates. An upper stainless steel plate is connected to the lower surface of the upper bearing plate, and a lower stainless steel plate is connected to the upper surface of the lower bearing plate. The bearing also includes a spherical plate, a spherical sliding plate, a flat sliding plate, a comb-tooth plate, and a shear pin unit. The shear pin unit includes a shear pin and a lower bearing plate shear pin. A first groove is provided on the upper surface of the spherical plate, and a flat sliding plate is fixed within the first groove and slides in contact with the upper stainless steel plate. A spherical groove is provided on the upper surface of the middle bearing plate, and the spherical sliding plate is fixed within the spherical groove. The inner part of the plate is fitted with the convex spherical surface of the spherical plate; the lower surface of the middle plate is provided with a second groove, and another flat sliding plate is fixed in the second groove and slides in contact with the lower stainless steel plate; the upper support plate is provided with an elongated hole, and the connecting bolt passes through the elongated hole to connect the sliding steel plate, the comb plate and the upper support plate, and the comb plate is connected to the lower support plate by the connecting bolt; the upper support plate is connected with an upper stop block, and the upper stop block is detachably connected to the upper support plate by the shear pin; the lower support plate is connected with a lower support plate retaining ring, and the lower support plate retaining ring is detachably connected to the lower support plate by the lower support plate shear pin.

[0009] Furthermore, the comb plate includes a base plate and a plurality of cantilever tooth structures extending from the base plate, wherein stress concentration grooves are provided at the root of the cantilever teeth.

[0010] Furthermore, the stress concentration groove is a rounded chamfer or a V-shaped groove.

[0011] Furthermore, the shear pin and the lower seat plate shear pin are made of brittle materials, and the shear strength of the lower seat plate shear pin is lower than the ultimate bearing capacity of the comb plate.

[0012] Furthermore, the upper stop block and the lower seat plate retaining ring are arranged around the middle seat plate to limit the displacement of the middle seat plate in the horizontal plane.

[0013] Furthermore, the spherical and flat sliding plates are made of polytetrafluoroethylene (PTFE) material.

[0014] Furthermore, the upper support plate is connected to the bottom anchor sleeve of the beam by anchor bolts, and the lower support plate is connected to the top anchor sleeve of the pier by anchor bolts.

[0015] Furthermore, the upper stainless steel plate is welded to the lower surface of the upper support plate, and the lower stainless steel plate is welded to the upper surface of the lower support plate.

[0016] Furthermore, the length direction of the oblong hole is consistent with the longitudinal direction of the bridge.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention achieves integrated seismic isolation, energy dissipation, and multi-level limiting functions through a highly integrated structural design. The spherical joint enabling rotation, the planar joint enabling sliding, and the comb plate as the core energy dissipation element are all integrated into a compact support body, fundamentally solving the problems of structural bulkiness, large space occupation, and increased substructure dimensions caused by the separate installation of the seismic isolation bearing and damper in traditional solutions. Through the elongated hole in the upper support plate, the plastic deformation capacity of the comb plate, and the fracture-resistant design of the shear pin unit, a clear multi-stage collaborative working mechanism is constructed, capable of systematically responding to different working conditions from temperature changes and common to rare earthquakes, achieving smooth displacement release, efficient energy dissipation, and system protection under extreme conditions. The surrounding arrangement of blocks and retaining rings provides effective longitudinal and lateral limiting, while the comb plate, as a connecting component, also provides vertical constraint, forming a multi-dimensional displacement control capability. Designing the comb plate and shear pin as replaceable components allows for convenient maintenance and performance restoration after an earthquake, significantly improving the structure's sustainability and life-cycle economics. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This utility model Figure 1 The main view.

[0022] Figure 3 This is a side view of the present invention.

[0023] Figure 4 This is a schematic diagram of the state of the bridge when it is displaced due to temperature changes.

[0024] Figure 5 This is a schematic diagram of the state of this utility model when the earthquake displacement exceeds the set temperature displacement.

[0025] Figure 6 This is a schematic diagram of the state in which the shearing force caused by displacement exceeds the design value of the shearing pin of the lower seat plate and is sheared.

[0026] Figure label:

[0027] 1. Beam bottom anchoring sleeve, 2. Anchoring bolt, 3. Upper support plate, 4. Upper stainless steel plate, 5. Flat sliding plate, 6. Spherical plate, 7. Spherical sliding plate, 8. Upper stop block, 9. Shear pin, 10. Middle support plate, 11. Lower support plate retaining ring, 12. Lower support plate shear pin, 13. Lower stainless steel plate, 14. Lower support plate, 15. Sliding steel plate, 16. Comb plate, 17. Connecting bolt, 18. Pier top anchoring sleeve. Detailed Implementation

[0028] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0029] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0030] Furthermore, 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 the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0032] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0034] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0035] Example 1:

[0036] This embodiment discloses a novel damping and seismic isolation bearing, including an upper support plate 3, a lower support plate 14, and a middle support plate 10 disposed between the upper support plate 3 and the lower support plate 14. An upper stainless steel plate 4 is connected to the lower surface of the upper support plate 3, and a lower stainless steel plate 13 is connected to the upper surface of the lower support plate 14. The invention also includes a spherical plate 6, a spherical sliding plate 7, a flat sliding plate 5, a comb plate 16, and a shear pin unit. The shear pin unit includes a shear pin 9 and a lower support plate shear pin 12. A first groove is provided on the upper surface of the spherical plate 6, and a flat sliding plate 5 is fixed in the first groove and slides in contact with the upper stainless steel plate 4. A spherical groove is provided on the upper surface of the middle support plate 10, and the spherical sliding plate 7 is fixed in the spherical groove. The inner part of the plate 10 is fitted with the convex spherical surface of the spherical plate 6; the lower surface of the middle plate 10 is provided with a second groove, and the other flat sliding plate 5 is fixed in the second groove and slides in contact with the lower stainless steel plate 13; the upper support plate 3 is provided with an elongated hole, and the connecting bolt 17 passes through the elongated hole to connect the sliding steel plate 15, the comb plate 16 and the upper support plate 3; the comb plate 16 is connected to the lower support plate 14 through the connecting bolt 17; the upper support plate 3 is connected with an upper stop block 8, and the upper stop block 8 is detachably connected to the upper support plate 3 through the shear pin 9; the lower support plate 14 is connected with a lower support plate retaining ring 11, and the lower support plate retaining ring 11 is detachably connected to the lower support plate 14 through the lower support plate shear pin 12.

[0037] Furthermore, the comb plate 16 includes a base plate and a plurality of cantilever tooth structures extending from the base plate, wherein stress concentration grooves are provided at the root of the cantilever teeth.

[0038] Furthermore, the stress concentration groove is a rounded chamfer or a V-shaped groove.

[0039] Furthermore, the shear pin 9 and the lower seat plate shear pin 12 are made of brittle materials, and the shear strength of the lower seat plate shear pin 12 is lower than the ultimate bearing capacity of the comb plate 16.

[0040] Furthermore, the upper stop block 8 and the lower seat plate retaining ring 11 are arranged around the middle seat plate 10 to limit the displacement of the middle seat plate 10 in the horizontal plane.

[0041] Furthermore, the spherical slide plate 7 and the flat slide plate 5 are made of polytetrafluoroethylene material.

[0042] Furthermore, the upper support plate 3 is connected to the bottom anchor sleeve 1 of the beam by anchor bolts 2, and the lower support plate 14 is connected to the top anchor sleeve 18 of the pier by anchor bolts 2.

[0043] Furthermore, the upper stainless steel plate 4 is welded to the lower surface of the upper support plate 3, and the lower stainless steel plate 13 is welded to the upper surface of the lower support plate 14.

[0044] Furthermore, the length direction of the oblong hole is consistent with the longitudinal direction of the bridge.

[0045] To facilitate a better understanding of this invention by those skilled in the art, the invention will be further described below in conjunction with specific embodiments.

[0046] This embodiment provides a novel damping and seismic isolation bearing for highway bridges, which integrates seismic isolation, energy dissipation, and multi-level limiting functions into a compact bearing body, thereby overcoming the problems of large installation space and increased pier size caused by separate arrangement of the bearing and damper.

[0047] See Figure 1 - Figure 6 The new type of damping seismic isolation bearing mainly includes an upper bearing plate 3, a lower bearing plate 14, and a middle bearing plate 10 disposed between the two.

[0048] Installation and securing:

[0049] The upper support plate 3 is fixedly connected to the beam bottom anchoring sleeve 1 embedded in the bridge beam body by anchoring bolts 2. The lower support plate 14 is fixedly connected to the pier top anchoring sleeve 18 embedded in the pier by anchoring bolts 2. The upper stainless steel plate 4 is fixed to the lower surface of the upper support plate 3 by welding, and the lower stainless steel plate 13 is fixed to the upper surface of the lower support plate 14 by welding.

[0050] Rotating and sliding components:

[0051] The upper surface of the spherical plate 6 has a first groove, and a flat sliding plate 5 is fixed in the first groove by interference fit or bonding. The flat sliding plate 5 and the upper stainless steel plate 4 form a sliding pair, allowing relative horizontal sliding between them. The upper surface of the middle seat plate 10 has a spherical groove, and the spherical sliding plate 7 is fixed in the spherical groove. The convex spherical surface of the spherical plate 6 and the concave spherical surface of the spherical sliding plate 7 cooperate to form a spherical revolute pair to accommodate the rotational deformation of the beam. The lower surface of the middle seat plate 10 has a second groove, and another flat sliding plate 5 is fixed in the second groove, forming another sliding pair with the lower stainless steel plate 13. Both the spherical sliding plate 7 and the flat sliding plate 5 are made of polytetrafluoroethylene (PTFE) to provide a sliding surface with a low coefficient of friction.

[0052] Core energy-consuming and force-transmitting components:

[0053] An elongated hole is provided on the upper support plate 3, with its length aligned with the longitudinal direction of the bridge. Connecting bolts 17 pass sequentially through the sliding steel plate 15, the comb plate 16, and the elongated hole, and are connected to the upper support plate 3 via nuts. Simultaneously, the comb plate 16 is fixedly connected to the lower support plate 14 via another set of connecting bolts 17. The comb plate 16 is made of low-yield-point steel LYP100 (yield strength 100MPa), and its structure includes a base plate and multiple cantilever teeth extending from the base plate to both sides. Each cantilever tooth has a rounded chamfer at its root, forming a stress concentration groove; the chamfer depth is 0.15 times the thickness of the cantilever tooth. The ratio of tooth height to tooth thickness is 8:1. This ensures that plastic deformation begins precisely at the tooth root under stress.

[0054] Limit and safety components:

[0055] An upper stop block 8 is welded to the upper support plate 3, and the upper stop block 8 is connected to the upper support plate 3 via a shear pin 9. A lower support plate retaining ring 11 is welded to the lower support plate 14, and the lower support plate retaining ring 11 is connected to the lower support plate 14 via a lower support plate shear pin 12. The upper stop block 8 and the lower support plate retaining ring 11 are arranged together around the middle support plate 10 to limit excessive displacement of the middle support plate 10 in the horizontal plane. Both the shear pin 9 and the lower support plate shear pin 12 are made of brittle materials such as cast iron. The shear strength of the lower support plate shear pin 12 is calculated and set to be lower than the load value corresponding to the overall ultimate bearing capacity of the comb plate 16.

[0056] The work process is as follows:

[0057] Temperature displacement condition: When the bridge slowly displaces in the longitudinal direction due to temperature changes, the connecting bolt 17 can slide freely in the hole through the design of the elongated hole on the upper support plate 3, thereby releasing the displacement caused by temperature. At this time, the comb plate 16 does not participate in the force.

[0058] Longitudinal seismic condition: When the longitudinal bridge seismic displacement exceeds the temperature displacement range, the connecting bolt 17 will contact the end of the elongated hole, pushing the cantilever teeth of the comb plate 16 to bend and deform. When seismic energy continues to be input, the deformation of the cantilever teeth enters the plastic stage, dissipating the seismic energy through its hysteresis characteristics. If the earthquake is extremely large, causing the deformation of the comb plate 16 to approach its limit, the lower seat plate shear pin 12 will be sheared off, the lower seat plate retaining ring 11 will lose its constraint, and the middle seat plate 10 can continue to displace, avoiding damage to the main structure, and forming a final hard limit at the end of the elongated hole through the anchor bolt 2.

[0059] Lateral seismic conditions: When a transverse earthquake occurs, the seismic force is first transmitted to the shear pin 9 through the upper stop block 8. When the force exceeds its design shear strength, the shear pin 9 is sheared off. Subsequently, the lateral force is transmitted to the comb plate 16 through components such as the middle seat plate 10 and the lower seat plate retaining ring 11, causing the cantilever teeth to bend laterally and enter the plastic energy dissipation stage.

[0060] Furthermore, in some preferred embodiments, the comb plate 16 is made of low-yield-point steel LYP235 (yield strength 235 MPa). The ratio of tooth height to tooth thickness of the cantilever teeth is adjusted to 5:1 to provide higher stiffness and load-bearing capacity. The stress concentration groove at the tooth root is designed as a V-shaped groove with a depth of 0.1 times the tooth thickness. The change in geometry allows for more precise control over the formation position of the plastic hinge and energy dissipation efficiency.

[0061] Accordingly, the diameter and material of the lower seat plate shear pin 12 are also adjusted in this embodiment to ensure that its shear strength is still lower than the ultimate bearing capacity of the optimized comb plate 16, thus maintaining its function as a "mechanical fuse". The spherical rotating pair formed by the spherical plate 6 and the spherical sliding plate 7 has a spherical radius set to 1000mm to accommodate the turning angle requirements of bridges with larger spans.

[0062] By adjusting the material strength and geometry of the comb plate 16, different stiffness and energy dissipation capacity options are provided. Different specifications of the comb plate 16 and matching shear pins can be selected based on the specific bridge weight, seismic intensity, and allowable displacement, thereby achieving customized bearing performance. The modular design allows this integrated bearing to be flexibly applied to various bridge construction scenarios ranging from general to high seismic intensity, while maintaining a high degree of structural compactness.

[0063] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel damping and seismic isolation bearing, comprising an upper bearing plate (3), a lower bearing plate (14), and a middle bearing plate (10) disposed between the upper bearing plate (3) and the lower bearing plate (14), wherein an upper stainless steel plate (4) is connected to the lower surface of the upper bearing plate (3), and a lower stainless steel plate (13) is connected to the upper surface of the lower bearing plate (14), characterized in that: It also includes a spherical plate (6), a spherical sliding plate (7), a flat sliding plate (5), a comb plate (16), and a shear pin unit. The shear pin unit includes a shear pin (9) and a lower seat plate shear pin (12). The upper surface of the spherical plate (6) is provided with a first groove, and a flat sliding plate (5) is fixed in the first groove and slides in contact with the upper stainless steel plate (4). The upper surface of the middle seat plate (10) is provided with a spherical groove, and the spherical sliding plate (7) is fixed in the spherical groove and cooperates with the convex spherical surface of the spherical plate (6); the lower surface of the middle seat plate (10) is provided with a second groove, and another flat sliding plate (5) is fixed in the second groove and slides in contact with the lower stainless steel plate (13); the upper support plate (3) is provided with an elongated hole, and the connecting bolt (17) passes through the elongated hole to connect the sliding steel plate (15) and the comb plate (16). The comb plate (16) is connected to the upper support plate (3) and connected to the lower support plate (14) by the connecting bolt (17); the upper support plate (3) is connected to the upper stop block (8), and the upper stop block (8) is detachably connected to the upper support plate (3) by the shear pin (9); the lower support plate (14) is connected to the lower support plate retaining ring (11), and the lower support plate retaining ring (11) is detachably connected to the lower support plate (14) by the lower support plate shear pin (12).

2. The novel damping seismic isolation bearing according to claim 1, characterized in that: The comb plate (16) includes a base plate and a plurality of cantilever tooth structures extending from the base plate, wherein stress concentration grooves are provided at the root of the cantilever teeth.

3. The novel damping seismic isolation bearing according to claim 2, characterized in that: The stress concentration groove is a rounded chamfer or a V-shaped groove.

4. The novel damping seismic isolation bearing according to claim 1, characterized in that: The shear pin (9) and the lower seat plate shear pin (12) are made of brittle materials, and the shear strength of the lower seat plate shear pin (12) is lower than the ultimate bearing capacity of the comb plate (16).

5. A novel damping seismic isolation bearing according to claim 1, characterized in that: The upper stop block (8) and the lower seat plate retaining ring (11) are arranged around the middle seat plate (10) to limit the displacement of the middle seat plate (10) in the horizontal plane.

6. A novel damping seismic isolation bearing according to claim 1, characterized in that: The spherical slide (7) and the flat slide (5) are made of polytetrafluoroethylene material.

7. A novel damping seismic isolation bearing according to claim 1, characterized in that: The upper support plate (3) is connected to the bottom anchor sleeve (1) of the beam by anchor bolts (2), and the lower support plate (14) is connected to the top anchor sleeve (18) of the pier by anchor bolts (2).

8. A novel damping seismic isolation bearing according to claim 1, characterized in that: The upper stainless steel plate (4) is welded to the lower surface of the upper support plate (3), and the lower stainless steel plate (13) is welded to the upper surface of the lower support plate (14).

9. A novel damping seismic isolation bearing according to claim 1, characterized in that: The length of the oblong hole is aligned with the longitudinal direction of the bridge.

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