A hierarchical viscoelastic energy dissipation buckling-restrained brace

Abstract

The application discloses a kind of hierarchical viscoelastic energy dissipation buckling-restrained braces, including energy dissipation core plate, energy dissipation core plate is successively covered with at least one layer of energy dissipation sleeve with both ends being open, the outer sleeve of outermost energy dissipation sleeve is covered with sliding sleeve shell, the inner side of each energy dissipation sleeve is provided with rubber layer between energy dissipation core plate or the outer side of corresponding energy dissipation sleeve, the damping inner layer of rubber layer gradually increases to outer layer, rubber layer is arranged between the outer side of energy dissipation sleeve in outermost layer and the inner wall of sliding sleeve shell;The length of energy dissipation core plate and the length of sliding sleeve shell are all greater than the length of each energy dissipation sleeve, and the first connecting head is arranged at one end of energy dissipation core plate and extends out of energy dissipation sleeve, the end of sliding sleeve shell towards the first connecting head is open, and the second connecting head is arranged at the end of sliding sleeve shell away from the first connecting head.The application can be different under different seismic action Energy dissipation capacity is different, adaptive adjustment energy dissipation under different earthquakes, and in the process of gradually increasing energy dissipation, the energy dissipation capacity of each stage can be fully played.

Description

Technical Field

[0001] This invention relates to the field of earthquake resistance and disaster prevention technology for building structures, and in particular to a stepped viscoelastic energy-dissipating buckling-resistant brace. Background Technology

[0002] With the continuous development of disaster prevention and mitigation, energy dissipation and vibration reduction technologies have increasingly attracted the attention of civil engineering structural designers and researchers. Traditional structural design concepts and methods rely entirely on the strength and plastic deformation capacity of structural components to resist external loads such as earthquakes, wind loads, and impact loads. Domestic and international civil engineering structural designers and researchers have proposed a series of energy dissipation and vibration reduction components, such as viscous dampers, viscoelastic dampers, tuned mass dampers, tuned liquid dampers, friction dampers, and metallic dampers.

[0003] Among these energy-dissipating and vibration-damping components, viscoelastic dampers utilize the reciprocating motion of a viscoelastic material along with the constrained steel plate. The shape change of the viscoelastic damping material dissipates most of the energy. Traditional viscoelastic dampers typically consist of a viscoelastic layer placed between the middle and side steel plates. Under the reciprocating relative shear force of the steel plates, the viscoelastic material undergoes shear deformation to dissipate energy. However, these dampers cannot achieve adaptive energy dissipation and vibration reduction in response to seismic or wind loads of varying intensities, and their connection to the structure is limited.

[0004] To address this, some viscoelastic dampers capable of staged energy dissipation have been designed. However, when dealing with different earthquakes, existing staged energy dissipation viscoelastic dampers may fail to meet the first-order energy dissipation requirement, so they gradually activate the second or third-order energy dissipation. However, multi-order energy dissipation cannot simultaneously dissipate energy and reduce vibration. When the later energy dissipation is activated, the earlier energy dissipation becomes ineffective. It is necessary to gradually increase the energy dissipation capacity of each stage, and during energy dissipation, the energy dissipation capacity of the other stages cannot be fully utilized. Summary of the Invention

[0005] The purpose of this invention is to provide a stepped viscoelastic energy-dissipating buckling-resisting brace that can dissipate energy differently under different seismic loads, achieving adaptive response of the damper's energy dissipation capacity to the structural response under different seismic loads, and more fully utilizing the energy dissipation capacity at each stage in the progressively increasing energy dissipation process.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0007] A stepped viscoelastic energy-dissipating buckling-resisting brace includes an energy-dissipating core plate, with at least one layer of energy-dissipating sleeves open at both ends wrapped around the energy-dissipating core plate in successive layers. The outermost energy-dissipating sleeve is wrapped with a sliding shell. A rubber layer is provided between the inner side of each energy-dissipating sleeve and the outer side of the energy-dissipating core plate or the corresponding energy-dissipating sleeve. A rubber layer is provided between the outer side of the outermost energy-dissipating sleeve and the inner wall of the sliding shell. The damping provided by the rubber layer gradually increases from the inner layer to the outer layer.

[0008] Each energy-consuming sleeve has an installation port at both ends of its opposite sides. A transmission gear parallel to the energy-consuming core plate is rotatably connected in each installation port. Both sides of the energy-consuming core plate are provided with core plate racks that mesh with the innermost transmission gear. Except for the innermost energy-consuming sleeve, the two inner walls of the sliding sleeve and the two inner sides of each energy-consuming sleeve are provided with inner racks that mesh with the adjacent transmission gears on their inner sides. Except for the outermost energy-consuming sleeve, the outer side of each energy-consuming sleeve is provided with an outer rack that meshes with the adjacent transmission gear on its outer side. The starting point of each core plate rack is left with a smooth step between the two ends of the energy-consuming core plate. The starting point of each inner rack is flush with the two ends of the corresponding energy-consuming sleeve and is always meshed with the corresponding transmission gear. The starting point of each outer rack is left with a smooth step between the two ends of the energy-consuming sleeve or the sliding sleeve.

[0009] The length of the energy-consuming core board and the length of the sliding sleeve are both greater than the length of each energy-consuming sleeve. One end of the energy-consuming core board extends out of the energy-consuming sleeve and is provided with a first connector. The end of the sliding sleeve facing the first connector is open, and the end of the sliding sleeve away from the first connector is provided with a second connector.

[0010] By adopting the above technical solution, during a small earthquake, the building structure causes the damper to be under tension or compression, which pulls the energy-dissipating core plate to move back and forth. The resulting displacement of the energy-dissipating core plate is small. At this time, the rubber layer between the energy-dissipating core plate and the innermost energy-dissipating plate generates damping, which consumes the energy generated by the earthquake. At this time, the displacement of the energy-dissipating core plate is less than the length of the smooth segment, which is insufficient to make the core plate rack mesh with the transmission gear, and only the first-order energy dissipation is performed.

[0011] When the seismic force increases and the deformation of the building structure increases, the displacement of the energy-dissipating core plate is greater than the length of the smooth segment. The core plate rack meshes with the transmission gear, and because the transmission gear meshes with the inner rack of the outer energy-dissipating sleeve, when the energy-dissipating core plate drives the transmission gear to rotate, the inner energy-dissipating sleeve can be displaced relative to the outer energy-dissipating sleeve because the outer energy-dissipating sleeve is fixed. At this time, both the energy-dissipating core plate and the inner energy-dissipating sleeve displace in the same direction, and the two rubber layers simultaneously generate damping to dissipate the energy generated during the earthquake, thus performing second-order energy dissipation.

[0012] If the seismic action continues to increase, the deformation of the building structure continues to increase, and the number of inner energy-dissipating sleeves that are displaced gradually increases until the outermost energy-dissipating sleeve is displaced. At this time, the energy-dissipating core plate and each layer of energy-dissipating sleeves are displaced in the same direction, and the multiple layers of rubber layers simultaneously generate damping to dissipate the energy generated during the earthquake.

[0013] Furthermore, since the front and rear ends of the damper are set up identically, the starting point of the outer rack is left with a smooth segment, and the transmission gears are connected in the same way, the damper can achieve stepped energy dissipation when it is under tension or compression.

[0014] A further feature of the present invention is that: a protective shell is provided over the sliding shell, one end of the protective shell is connected to the second connector, a filling layer is provided between the protective shell and the sliding shell, the filling layer is provided with an active space for each energy-consuming shell to expand and contract, and a perforation is provided at the end of the protective shell away from the second connector for the energy-consuming core plate to pass through and be slidably connected thereto.

[0015] A further provision of the present invention is that the filling layer is concrete.

[0016] A further feature of the present invention is that each rubber layer is connected to the energy-consuming core plate, energy-consuming sleeve or sliding sleeve on both sides through a vulcanization process.

[0017] A further feature of the present invention is that the energy-consuming sleeve has two layers.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] Firstly, during an earthquake, when the damper is under tension or compression, the present invention can gradually increase the amount of energy consumed by the rubber layer according to the earthquake amplitude, thereby gradually increasing the energy consumption capacity of the damper. This allows it to adaptively achieve different energy consumption and vibration reduction effects in small and large earthquakes, resulting in good vibration reduction performance.

[0020] Secondly, through the ingenious connection of the gear structure, the present invention can drive the energy consumption of the next stage only when the displacement is greater than the length of the smooth segment. As the number of moving energy-consuming sleeves is gradually increased, the energy-consuming core plates and energy-consuming sleeves that have been displaced before can continue to displace in the same direction, so that multiple rubber layers consume energy at the same time. While gradually increasing the energy consumption capacity, more structures participate in the seismic energy consumption, rather than just the energy-consuming structure of a certain stage, so as to make fuller use of the energy consumption capacity of each stage.

[0021] Thirdly, the present invention adds a protective shell and a filling layer. When the component is relatively long, the protective shell and filling layer can prevent the component from becoming unstable under pressure. At the same time, the protective shell and filling layer can protect the rubber layer and internal components, increasing their durability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a cross-sectional view of the present invention;

[0024] Figure 3 This is a cross-sectional view of the present invention with the protective shell and filler layer removed;

[0025] Figure 4 This is a longitudinal cross-sectional view of the present invention;

[0026] Figure 5 This is a partial cross-sectional view used to illustrate the internal structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the overall structure of the innermost energy-consuming sleeve;

[0028] Figure 7 This is a schematic diagram of the overall structure of the outermost energy-consuming sleeve.

[0029] In the diagram: 1. Energy-consuming core board; 11. First connector; 2. Energy-consuming sleeve; 21. Mounting port; 3. Sliding sleeve; 31. Second connector; 4. Rubber layer; 5. Transmission gear; 61. Core board rack; 62. Inner rack; 63. Outer rack; 64. Smooth segment; 7. Protective sleeve; 8. Filling layer; 81. Activity space. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Example, refer to Figure 1-7 A stepped viscoelastic energy-dissipating buckling-resistance brace includes an energy-dissipating core plate 1. To ensure the strength of the energy-dissipating core plate 1, it should be as thick as possible. At least one layer of energy-dissipating sleeve 2, open at both ends, is successively fitted over the energy-dissipating core plate 1. The cross-section of the energy-dissipating sleeve 2 is approximately C-shaped, and its openings all face towards the energy-dissipating core plate 1. In this embodiment, there are two layers of energy-dissipating sleeve 2, but it is not limited to two layers; it can also be one, three, or more layers. A sliding sleeve 3 is fitted over the outermost energy-dissipating sleeve 2.

[0032] A rubber layer 4 is provided between one inner side of each energy-consuming sleeve 2 and the energy-consuming core plate 1 or the corresponding outer side of the energy-consuming sleeve 2. Alternatively, rubber layers 4 can be provided on both inner sides of the energy-consuming sleeve 2. A rubber layer 4 is provided between one outer side of the outermost energy-consuming sleeve 2 and the inner wall of the sliding sleeve 3. Alternatively, rubber layers 4 can be provided on both outer sides of the outermost energy-consuming sleeve 2. The distribution of the rubber layers 4 is determined according to design requirements. Each rubber layer 4 is connected to the energy-consuming core plate 1, energy-consuming sleeve 2 or sliding sleeve 3 on both sides through a vulcanization process. In order to ensure the stability of the structure, the damping provided by the rubber layer 4 gradually increases from the inner layer to the outer layer, ensuring that when the damper is under tension or compression, the outer layer remains stationary while the inner layer displaces.

[0033] Each energy-consuming sleeve 2 has an installation port 21 at both ends, and a transmission gear 5 parallel to the energy-consuming chip is rotatably connected in each installation port 21. The energy-consuming core plate 1 has two core plate racks 61 on both sides that mesh with the innermost transmission gear 5. The sliding sleeve 3 has two inner racks 62 on both inner walls and the outer energy-consuming sleeve 2 that mesh with the adjacent inner transmission gear 5. The inner energy-consuming sleeve 2 has two outer racks 63 on both outer sides that mesh with the adjacent outer transmission gear 5. Each core plate rack 61 has a smooth segment 64 between its starting point and both ends of the energy-consuming core plate 1. Each inner rack 62 has its starting point flush with both ends of the corresponding energy-consuming sleeve 2 or sliding sleeve 3 and is always engaged with the corresponding transmission gear 5. Each outer rack 63 has a smooth segment 64 between its starting point and both ends of the energy-consuming sleeve 2. This allows the energy-consuming core plate 1 to displace and consume energy before the second stage of the energy-consuming sleeve 2 can be activated. After the energy-consuming sleeve 2 displaces and consumes energy, the third stage of the energy-consuming sleeve 2 can be activated, forming a step-by-step energy consumption mode.

[0034] The length of the energy-consuming core board 1 and the length of the sliding sleeve 3 are both greater than the length of each energy-consuming sleeve 2. One end of the energy-consuming core board 1 extends out of the energy-consuming sleeve 2 and is provided with a first connector 11. The sliding sleeve 3 has an opening at one end facing the first connector 11, and a second connector 31 is provided at the end of the sliding sleeve 3 away from the first connector 11.

[0035] The sliding sleeve 3 is covered by a protective sleeve 7. One end of the protective sleeve 7 is connected to the second connector 31. A filling layer 8 is provided between the protective sleeve 7 and the sliding sleeve 3. The filling layer 8 is made of concrete. The interior of the filling layer 8, away from the second connector 31, has a section of movable space 81 for each energy-consuming sleeve 2 to expand and contract. The end of the protective sleeve 7 away from the second connector 31 has a through hole for the energy-consuming core plate 1 to pass through and slide in connection with it (figure omitted).

[0036] Working principle: During a small earthquake, the building structure causes the damper to be under tension or compression, which pulls the energy dissipation core plate 1 to move back and forth. When the energy dissipation core plate 1 moves, the rubber layer 4 between the energy dissipation core plate 1 and the innermost energy dissipation sleeve 2 generates damping to dissipate the energy generated during the earthquake. At this time, the displacement of the energy dissipation core plate 1 is less than the length of the smooth segment 64, which is insufficient to make the core plate rack 61 mesh with the transmission gear 5, and only the first-order energy dissipation is performed.

[0037] When the earthquake amplitude increases, the displacement of the energy-dissipating core plate 1 is greater than the length of the smooth segment 64. The core plate rack 61 meshes with the transmission gear 5. Since the transmission gear 5 meshes with the inner rack 62 of the outer energy-dissipating sleeve 2, when the displacement of the energy-dissipating core plate 1 drives the transmission gear 5 to rotate, the inner energy-dissipating sleeve 2 can be displaced relative to the outer energy-dissipating sleeve 2 because the outer energy-dissipating sleeve 2 is fixed. At this time, the energy-dissipating core plate 1 and the inner energy-dissipating sleeve 2 both displace in the same direction. The two rubber layers 4 simultaneously generate damping to consume the energy generated during the earthquake, thus performing second-order energy dissipation.

[0038] If the earthquake amplitude continues to increase, the displacement amplitude of the inner energy-dissipating sleeve 2 is greater than the length of the smooth segment 64. The outer rack 63 on the inner energy-dissipating sleeve 2 meshes with the transmission gear 5. Since the transmission gear 5 meshes with the inner rack 62 on the inner side of the sliding sleeve 3, the outer energy-dissipating sleeve 2 can be displaced relative to the sliding sleeve 3. At this time, the energy-dissipating core plate 1, the inner energy-dissipating sleeve 2 and the outer energy-dissipating sleeve 2 all displace in the same direction. The three rubber layers 4 simultaneously generate damping to dissipate the energy generated during the earthquake, thus performing third-order energy dissipation.

[0039] Furthermore, since the front and rear ends of the damper are set the same, the starting point of the outer rack 63 is left with a smooth segment 64, and the transmission gear 5 is connected in the same way, the damper can achieve stepped energy dissipation when it is under tension or compression.

[0040] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A stepped viscoelastic energy-dissipating buckling-resisting support, comprising an energy-dissipating core plate (1), characterized in that: The energy-consuming core plate (1) is covered with at least one layer of energy-consuming sleeve (2) with openings at both ends. The outermost energy-consuming sleeve (2) is covered with a sliding shell (3). A rubber layer (4) is provided between the inner side of each energy-consuming sleeve (2) and the outer side of the energy-consuming core plate (1) or the corresponding energy-consuming sleeve (2). A rubber layer (4) is provided between the outer side of the outermost energy-consuming sleeve (2) and the inner wall of the sliding shell (3). The damping provided by the rubber layer (4) gradually increases from the inner layer to the outer layer. Each energy-consuming sleeve (2) has an installation port (21) at both ends of opposite sides. Each installation port (21) is rotatably connected to a transmission gear (5) parallel to the energy-consuming core plate (1). Both sides of the energy-consuming core plate (1) are provided with core plate racks (61) that mesh with the innermost transmission gear (5). Except for the innermost energy-consuming sleeve (2), the two inner walls of the sliding sleeve (3) and the two inner sides of each energy-consuming sleeve (2) are provided with inner racks (62) that mesh with the adjacent transmission gears (5) on their inner sides. Except for the outermost energy-consuming sleeve (2) In addition, each energy-consuming sleeve (2) is provided with an outer rack (63) that meshes with the adjacent transmission gear (5) on its outer side. The starting point of each core plate rack (61) is left with a smooth segment (64) between the two ends of the energy-consuming core plate (1). The starting point of each inner rack (62) is flush with the two ends of the corresponding energy-consuming sleeve (2) and is always meshed with the corresponding transmission gear (5). The starting point of each outer rack (63) is left with a smooth segment (64) between the two ends of the energy-consuming sleeve (2) or the sliding sleeve (3). The length of the energy-consuming core plate (1) and the length of the sliding sleeve (3) are both greater than the length of each energy-consuming sleeve (2). One end of the energy-consuming core plate (1) extends out of the energy-consuming sleeve (2) and is provided with a first connector (11). The sliding sleeve (3) has an opening at one end facing the first connector (11), and a second connector (31) is provided at the end of the sliding sleeve (3) away from the first connector (11). Each rubber layer (4) is connected to the energy-consuming core plate (1), energy-consuming sleeve (2) or sliding sleeve shell (3) on both sides through a vulcanization process. The energy-consuming sleeve (2) has two layers.

2. The stepped viscoelastic energy-dissipating buckling-resisting support according to claim 1, characterized in that: The sliding sleeve (3) is covered by a protective sleeve (7). One end of the protective sleeve (7) is connected to the second connector (31). A filling layer (8) is provided between the protective sleeve (7) and the sliding sleeve (3). The filling layer (8) is provided with an active space (81) for each energy-consuming sleeve (2) to expand and contract in the interior away from the second connector (31). The protective sleeve (7) is provided with a perforation at the end away from the second connector (31) for the energy-consuming core plate (1) to pass through and slide with it.

3. The stepped viscoelastic energy-dissipating buckling-resistant support according to claim 2, characterized in that: The filling layer (8) is concrete.

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