Viscoelastic double-step all-steel buckling restrained brace

Abstract

The invention belongs to the technical field of restrained braces, and particularly relates to a viscoelastic double-step all-steel buckling restrained brace which comprises an outer sleeve, two viscoelastic devices, a core plate and a limiting structure, the outer sleeve, the two viscoelastic devices and the core plate are arranged, and the two viscoelastic devices are embedded in the inner side and the outer side of the two ends of the outer sleeve respectively; the viscoelastic material can absorb and dissipate energy generated by earthquakes or wind loads through shear deformation, the vibration response of a structure body is effectively reduced, the anti-seismic performance of a building is improved, the core plate movably penetrates through the viscoelastic device and is arranged in the outer sleeve, the core plate is preliminarily restrained through the outer sleeve, and the anti-seismic performance of the building is improved. According to the limiting structure, the side plates and the multiple limiting plates are matched to limit the core plate, lateral displacement of the core plate can be limited, bending instability of the core plate in the stress process is prevented, it is ensured that the core plate is mainly subjected to axial deformation all the time, and the anti-seismic property of the viscoelastic device is fully exerted.

Description

Technical Field

[0001] This invention belongs to the field of constrained bracing technology, and particularly relates to a viscoelastic double-stage all-steel buckling constrained bracing. Background Technology

[0002] Buckling-restrained braces (BRBs) are specialized structural bracing devices widely used in seismic design of buildings. Their primary function is to absorb and disperse seismic energy during an earthquake, reducing structural deformation and damage, thereby protecting the overall safety and stability of the building. The basic components of a buckling-restrained brace include a core unit, restraint units, and connecting components. The core unit is typically made of high-strength steel with excellent plastic deformation capacity, capable of absorbing significant amounts of energy during an earthquake. The restraint units limit the lateral deformation of the core unit, preventing buckling and ensuring the stability and reliability of the brace. The connecting components link the core unit and restraint units together to form a unified structure.

[0003] In current technologies, structural vibration reduction calculations and analyses, especially for buildings in two zones and eight categories, require calculations of vibration reduction conditions such as minor, moderate, and major earthquakes. Ordinary buckling-restrained braces can only control a certain condition, and under minor earthquakes, buckling-restrained braces are not suitable for yielding. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a viscoelastic double-stage all-steel buckling-restrained brace.

[0005] A viscoelastic double-stage all-steel buckling restraint brace includes: an outer sleeve, two viscoelastic devices, a core plate, and a restraint structure; The two viscoelastic devices are located at both ends of the outer sleeve. The core plate extends transversely through the outer sleeve and is connected to the outer sleeve through the viscoelastic devices. The limiting structure includes two side plates and several limiting plates. The two side plates and several limiting plates are fixedly connected to the inner wall of the inner cavity of the outer sleeve. The limiting plates cooperate with the side plates to limit the core plate and prevent it from bending.

[0006] Furthermore, the viscoelastic device includes an outer steel plate layer, an outer rubber layer, an inner steel plate layer, and an inner rubber layer. The outer steel plate layer, the outer rubber layer, the outer sleeve, the inner steel plate layer, and the inner rubber layer are stacked sequentially and fixedly connected to the circular outer sleeve through a vulcanization process. A sealing plate is connected to one side of the outer steel plate layer, the outer rubber layer, the inner steel plate layer, and the inner rubber layer.

[0007] Furthermore, a friction structure is provided on one side of each of the two limiting plates. The friction structure is a friction plate disposed between the side plate and the core plate, and the friction plate is disposed between the corresponding two limiting plates.

[0008] Furthermore, the core board includes an integrally formed connecting section and an energy-dissipating section, the friction structure is disposed in the energy-dissipating section of the core board, and the connecting section of the core board is used for connection with the building structure.

[0009] Furthermore, the limiting plate is configured to correspond to the energy-consuming section of the core plate, and through cooperation with the side plate, it restricts the lateral displacement of the core plate, thereby preventing the core plate from bending.

[0010] Furthermore, both the outer and inner rubber layers are made of high-damping rubber, and the outer and inner steel plate layers are integrated with the high-damping rubber layers through a vulcanization process.

[0011] Furthermore, the lengths of the outer steel plate layer and the inner steel plate layer are longer than the lengths of the outer rubber layer and the inner rubber layer, and there is a gap between the sealing plate and the outer sleeve.

[0012] Furthermore, the width of the front cross-section of the connecting section is greater than the width of the front cross-section of the energy-consuming section.

[0013] Furthermore, the connecting section and the energy-consuming section are integrally formed through a beveled edge transition.

[0014] Furthermore, both the outer sleeve and the core plate are integrally formed from steel, and there is a gap between the outer side of the connecting section and the inner wall of the outer sleeve.

[0015] Compared with existing technologies, the viscoelastic double-stage all-steel buckling restraint brace of the present invention has the following advantages: The system comprises an outer sleeve, two viscoelastic devices, a core plate, and a limiting structure. Two viscoelastic devices are symmetrically distributed at both ends of the outer sleeve. When the building is subjected to harmful mechanical energy such as earthquakes or wind loads, the relative displacement between the core plate and the outer sleeve will cause the viscoelastic devices to undergo shear or compression deformation, thereby efficiently consuming, absorbing, and dissipating harmful mechanical energy and reducing the impact of mechanical energy on the main structure of the building. The limiting structure, composed of side plates and limiting plates, is fixedly connected to the inner cavity of the outer sleeve. Through the cooperation of the two, the core plate is laterally constrained, effectively limiting the bending deformation of the core plate during the stress process. This prevents the core plate from losing its energy dissipation and force transmission functions due to bending failure, ensuring the overall stress stability of the support device and ensuring that it continues to play its role in energy dissipation and vibration reduction under various working conditions. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the sealing plate of the present invention; Figure 3 This is a schematic diagram of the outer steel plate layer and the inner steel plate layer of the present invention; Figure 4 This is a schematic diagram of the side plate and core plate of the present invention; The markings in the diagram are as follows: 1. Outer sleeve; 2. Core plate; 3. Side plate; 4. Limiting plate; 5. Outer steel plate layer; 6. Outer rubber layer; 7. Inner steel plate layer; 8. Inner rubber layer; 9. Friction structure; 10. Connecting section; 11. Energy dissipation section; 12. Sealing plate; 13. Beveled edge. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0018] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0019] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0021] Reference Figures 1-4A viscoelastic double-stage all-steel buckling restraint brace includes: an outer sleeve 1, two viscoelastic devices, a core plate 2, and a limiting structure; The two viscoelastic devices are located at both ends of the outer sleeve 1. The core plate 2 extends transversely through the outer sleeve 1 and is connected to the outer sleeve 1 through the viscoelastic devices. The limiting structure includes two side plates 3 and several limiting plates 4. The two side plates 3 and several limiting plates 4 are fixedly connected to the inner wall of the inner cavity of the outer sleeve 1. The limiting plates 4 cooperate with the side plates 3 to limit the core plate 2 to prevent it from bending.

[0022] In use, this device consists of an outer sleeve 1, two viscoelastic devices, a core plate 2, and a limiting structure. The two viscoelastic devices are symmetrically distributed at both ends of the outer sleeve 1. When the building is subjected to harmful mechanical energy such as earthquakes or wind loads, the relative displacement between the core plate 2 and the outer sleeve 1 will cause the viscoelastic devices to undergo shear or compression deformation, thereby efficiently consuming, absorbing, and dissipating harmful mechanical energy and reducing the impact of mechanical energy on the main structure of the building. The limiting structure, composed of side plates 3 and limiting plates 4, is fixedly connected to the inner cavity of the outer sleeve 1. Through the cooperation of the two, the core plate 2 is laterally constrained, effectively limiting the bending deformation of the core plate 2 during the stress process, preventing the core plate 2 from losing its energy dissipation and force transmission functions due to bending failure, ensuring the overall stress stability of the support device, and ensuring that it continues to play an energy dissipation and shock absorption role under various working conditions.

[0023] In the example of this application, the viscoelastic device includes an outer steel plate layer 5, an outer rubber layer 6, an inner steel plate layer 7, and an inner rubber layer 8. The outer steel plate layer 5, the outer rubber layer 6, the outer sleeve 1, the inner steel plate layer 7, and the inner rubber layer 8 are stacked sequentially and are fixedly connected to the circular outer sleeve 1 through a vulcanization process. A sealing plate 12 is connected to one side of the outer steel plate layer 5, the outer rubber layer 6, the inner steel plate layer 7, and the inner rubber layer 8.

[0024] As a preferred example of this utility model, the sequential stacking design of the outer steel plate layer 5, the outer rubber layer 6, the inner steel plate layer 7, and the inner rubber layer 8 forms a composite energy-dissipating system of steel-rubber-steel-rubber. This system can expand the energy absorption range through the synergistic deformation between each layer, and can more fully dissipate harmful mechanical energy compared to energy-dissipating components of a single material or structure. The vulcanization process is used to form a fixed connection between each layer and the outer sleeve 1, ensuring the strong connection between the viscoelastic device and the outer sleeve 1, avoiding interlayer separation or relative sliding under stress, and ensuring the stability of the energy dissipation process. The sealing plate 12 can form a sealed protection on the side of the viscoelastic device, preventing external dust, moisture, etc. from corroding the internal rubber layer and steel plate layer, delaying material aging, extending the service life of the device, maintaining long-term energy dissipation effect, and when the core plate 2 is installed, the core plate 2 moves through the sealing plate 12 and enters the outer sleeve 1.

[0025] In the example of this application, a friction structure 9 is provided on one side of each of the two limiting plates 4. The friction structure 9 is a friction plate disposed between the side plate 3 and the core plate 2, and the friction plate is disposed between the corresponding two limiting plates 4.

[0026] As a preferred example of this utility model, when the core plate 2 is displaced under force, the viscoelastic device achieves the first level of energy dissipation through deformation. At the same time, friction is generated between the core plate 2 and the friction plate due to relative sliding, achieving the second level of energy dissipation through friction. The superposition of the dual energy dissipation effects can more efficiently consume harmful mechanical energy and further reduce damage to the building. The friction plate is set between the side plate 3 and the core plate 2 and between the two corresponding limiting plates 4. This installation position can ensure that the friction plate and the core plate 2 are tightly fitted, ensuring the stable performance of the friction effect. At the same time, the limiting plates 4 form a lateral positioning for the friction plate, preventing the friction plate from shifting when under force, and ensuring the continuity and stability of friction energy dissipation.

[0027] In the example of this application, the core board 2 includes an integrally formed connecting section 10 and an energy-dissipating section 11, the friction structure 9 is disposed on the energy-dissipating section 11 of the core board 2, and the connecting section 10 of the core board 2 is used to connect with the building structure.

[0028] As a preferred example of this utility model, the energy-consuming section 11 serves as a dedicated energy dissipation area, with a concentrated arrangement of friction structures 9 and a viscoelastic device. This allows harmful mechanical energy to be concentrated, absorbed, and dissipated in this area, improving the targeting and efficiency of energy consumption. The connecting section 10 is specifically designed for connection with the building structure. Its structural design prioritizes connection strength and reliability, ensuring smooth force transmission between the device and the building structure, and preventing the energy-consuming device from malfunctioning due to connection failure.

[0029] In the example of this application, the limiting plate 4 is configured to correspond to the energy-consuming section 11 of the core plate 2, and the lateral displacement of the core plate 2 is limited by the cooperation with the side plate 3, thereby preventing the core plate 2 from bending.

[0030] As a preferred example of this utility model, the energy-consuming section 11 is the core area of ​​the device that consumes harmful mechanical energy. During the stress process, it is prone to bending deformation due to lateral force. The cooperation between the limiting plate 4 and the side plate 3 can specifically limit the lateral displacement of the energy-consuming section 11, fundamentally preventing the energy-consuming section 11 from bending and failing. This limiting design will not affect the normal displacement of the energy-consuming section 11 along the force direction (ensuring that the viscoelastic device and friction structure 9 can fully deform or slide to achieve energy consumption), and can also prevent lateral bending from damaging the energy consumption mechanism, so that the device can always maintain high-efficiency energy consumption performance under various loads.

[0031] In the example of this application, the outer rubber layer 6 and the inner rubber layer 8 are both made of high-damping rubber, and the outer steel plate layer 5 and the inner steel plate layer 7 are integrated with the high-damping rubber layer through a vulcanization process.

[0032] As a preferred example of this utility model, high-damping rubber itself has excellent energy absorption and dissipation properties. Compared with ordinary rubber, it can more efficiently convert harmful mechanical energy into heat energy and other forms of dissipation, which greatly improves the core energy consumption efficiency of the device. The vulcanization process forms a solid integrated structure between the steel plate layer and the rubber layer, ensuring that the two work together during the deformation process under stress, avoiding interlayer peeling or relative sliding, and ensuring the stability of the energy consumption process. The integrated structure also improves the fatigue resistance of the device, reduces the performance degradation caused by interlayer wear during long-term use, and extends the service life of the device.

[0033] In the example of this application, the lengths of the outer steel plate layer 5 and the inner steel plate layer 7 are longer than the lengths of the outer rubber layer 6 and the inner rubber layer 8, and there is a gap between the sealing plate 12 and the outer sleeve 1.

[0034] As a preferred example of this utility model, the design of a longer steel plate layer allows the portion of the steel plate layer extending beyond the rubber layer to form a more stable connection with the sealing plate 12, preventing the rubber layer from directly bearing the connection stress and causing premature damage; the distance between the sealing plate 12 and the outer sleeve 1 provides sufficient space for the shear or compression deformation of the rubber layer under stress.

[0035] In the example of this application, the width of the front cross section of the connecting segment 10 is greater than the width of the front cross section of the energy dissipation segment 11.

[0036] As a preferred example of this utility model, the front cross-sectional width of the core plate 2 connecting section 10 is greater than that of the energy dissipation section 11. As a key part connected to the main building structure, the connecting section 10 needs to bear and transmit a large load. A wider cross-sectional width can significantly improve its structural strength and load-bearing capacity, ensure the reliability and stability of the connection, and avoid the overall failure of the device due to insufficient strength of the connecting section 10.

[0037] In the example of this application, the connecting segment 10 and the energy-consuming segment 11 are integrally formed through the beveled edge 13.

[0038] As a preferred example of this utility model, the connecting section 10 and the energy dissipation section 11 are integrally formed by transition through the beveled edge 13, which effectively improves the structural integrity and fatigue resistance of the core plate 2. The beveled edge transition design avoids stress concentration caused by abrupt change in cross-sectional width between the connecting section 10 and the energy dissipation section 11, and reduces the risk of cracks or fractures in the core plate 2 at the transition part under load.

[0039] In the example of this application, the outer sleeve 1 and the core plate 2 are both integrally formed of steel, and there is a gap between the outer side of the connecting section 10 and the inner wall of the outer sleeve 1.

[0040] As a preferred example of this utility model, the outer sleeve 1 and the core plate 2 are integrally formed from all steel materials, and a gap is reserved between the outer side of the connecting section 10 and the inner wall of the outer sleeve 1, which takes into account both the structural strength and energy consumption efficiency of the device. The all-steel material has excellent structural strength, rigidity and durability, and both the outer sleeve 1 and the core plate 2 are made entirely of steel, without the traditional internal filling with concrete.

[0041] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A viscoelastic, two-stage, all-steel buckling-restrained brace, characterized in that, include: Outer sleeve (1), two viscoelastic devices, core plate (2) and limiting structure; The two viscoelastic devices are located at both ends of the outer sleeve (1). The core plate (2) passes through the outer sleeve (1) laterally and is connected to the outer sleeve through the viscoelastic devices. The limiting structure includes two side plates (3) and several limiting plates (4). The two side plates (3) and several limiting plates (4) are fixedly connected to the inner wall of the inner cavity of the outer sleeve (1). The limiting plates (4) cooperate with the side plates (3) to limit the core plate (2) to prevent it from bending.

2. The viscoelastic double-stage all-steel buckling-restrained brace according to claim 1, characterized in that, The viscoelastic device includes an outer steel plate layer (5), an outer rubber layer (6), an inner steel plate layer (7), and an inner rubber layer (8). The outer steel plate layer (5), the outer rubber layer (6), the outer sleeve (1), the inner steel plate layer (7), and the inner rubber layer (8) are stacked in sequence and are fixedly connected to the circular outer sleeve (1) through a vulcanization process. A sealing plate (12) is connected to one side of the outer steel plate layer (5), the outer rubber layer (6), the inner steel plate layer (7), and the inner rubber layer (8).

3. The viscoelastic double-stage all-steel buckling-restrained brace according to claim 1, characterized in that, One side of each of the two limiting plates (4) is provided with a friction structure (9), which is a friction plate disposed between the side plate (3) and the core plate (2), and the friction plate is disposed between the two corresponding limiting plates (4).

4. The viscoelastic double-stage all-steel buckling-restrained brace according to claim 3, characterized in that, The core plate (2) includes an integrally formed connecting section (10) and an energy-consuming section (11). The friction structure (9) is disposed in the energy-consuming section (11) of the core plate (2). The connecting section (10) of the core plate (2) is used to connect with the building structure.

5. The viscoelastic double-stage all-steel buckling-restrained brace according to claim 1, characterized in that, The limiting plate (4) is set in correspondence with the energy-consuming section (11) of the core plate (2). By cooperating with the side plate (3), the lateral displacement of the core plate (2) is restricted, so as to prevent the core plate (2) from bending.

6. The viscoelastic double-stage all-steel buckling-restrained brace according to claim 1, characterized in that, The outer rubber layer (6) and the inner rubber layer (8) are both made of high-damping rubber. The outer steel plate layer (5) and the inner steel plate layer (7) are integrated with the high-damping rubber layer through a vulcanization process.

7. The viscoelastic double-stage all-steel buckling-restrained brace according to claim 1, characterized in that, The lengths of the outer steel plate layer (5) and the inner steel plate layer (7) are longer than the lengths of the outer rubber layer (6) and the inner rubber layer (8), and there is a gap between the sealing plate (12) and the outer sleeve (1).

8. A viscoelastic double-stage all-steel buckling-restrained brace according to claim 1, characterized in that, The width of the front section of the connecting segment (10) is greater than the width of the front section of the energy-consuming segment (11).

9. A viscoelastic double-stage all-steel buckling-restrained brace according to claim 1, characterized in that, The connecting section (10) and the energy-consuming section (11) are integrally formed by transition through the inclined side (13).

10. A viscoelastic double-stage all-steel buckling-restrained brace according to claim 1, characterized in that, The outer sleeve (1) and the core plate (2) are both integrally formed of steel, and there is a gap between the outer side of the connecting section (10) and the inner wall of the outer sleeve (1).

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