Self-centering variable friction energy dissipation device with ring spring

Abstract

The application relates to the field of building engineering anti-seismic technology, and particularly relates to a self-resetting variable-friction energy dissipation device with a ring-shaped spring, which comprises a core assembly, a connecting assembly, a ring-shaped spring, a constraint plate, a limiting plate and a fastening assembly. Two connecting assemblies are symmetrically arranged on the core assembly, the core assembly is fixedly arranged between the two connecting assemblies, the core assembly is symmetrically arranged, the core assembly is provided with a core plate, the limiting plate is symmetrically arranged on the two sides of the core plate and located between the two connecting assemblies, the constraint plate is symmetrically arranged at the two ends of the core plate, the ring-shaped spring is arranged outside the limiting plate, the fastening assembly comprises long bolts and short bolts, the long bolts fasten the limiting plate and the constraint plate, and the short bolts fasten the core assembly and the connecting assembly. In the application, the sawtooth-shaped surface between the core plate and the limiting plate can provide the device with energy dissipation capacity, the ring-shaped spring has super-elasticity, and the self-resetting capacity of the component is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of seismic resistance technology in building engineering, specifically to a self-resetting variable friction energy dissipation device with a ring spring. Background Technology

[0002] Traditional seismic design of structures mainly utilizes the plastic deformation of lateral force-resisting components under seismic loads to dissipate energy. This places high demands on the ductility of structural components. Therefore, to improve the seismic performance of the main structure, multiple seismic defense lines are usually set up in the seismic design of the main structure. Selecting energy-dissipating components that match the stiffness and ultimate bearing capacity of the main structure is a common method. However, the single energy dissipation process of such energy-dissipating components often has the disadvantage of insufficient energy dissipation and poor post-earthquake recovery ability. Moreover, if the matching energy-dissipating components are damaged during use, the entire component needs to be replaced, which is troublesome and affects the repair efficiency.

[0003] Additional energy dissipation devices are one of the important methods to improve the seismic toughness of building structures. They are usually used in conjunction with seismic isolation and damping technologies such as self-resetting, swaying, and replaceable devices. Traditional additional energy dissipation devices mainly rely on the plastic deformation caused by the yielding of steel plates to dissipate energy. After an earthquake, replacing the damaged energy dissipation steel plates can restore the energy dissipation capacity of the additional energy dissipation devices. These devices have strong energy dissipation capacity, but they do not have self-resetting capacity. This can lead to a large residual displacement of the main structure after an earthquake. Related studies have shown that when the residual displacement angle of the main structure exceeds 0.5%, the cost of repairing it will be higher than the cost of rebuilding it. Therefore, if the additional energy dissipation devices have both energy dissipation capacity and self-resetting capacity, the post-earthquake functional recoverability of building structures can be effectively improved. Summary of the Invention

[0004] The purpose of this invention is to provide a self-resetting variable friction energy dissipation device with a ring spring to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-resetting variable friction energy dissipation device with a ring spring, comprising a core component, a connecting component, a ring spring, a constraint plate, a limiting plate, and a fastening component. Two connecting components are symmetrically arranged vertically. The core component is fixedly arranged between the two connecting components. Two core components are symmetrically arranged, and a core plate is provided on each core component. Two constraint plates and two limiting plates are each provided. The limiting plates are symmetrically arranged on both sides of the core plate and located between the two connecting components. The two constraint plates are symmetrically arranged at both ends of the core plate and located between the two limiting plates. The ring spring is located outside the limiting plate. The fastening component includes a long bolt and a short bolt. The long bolt fastens the limiting plate to the constraint plate, and the short bolt fastens the core component to the connecting component.

[0006] Furthermore, the core component is also provided with an end plate, the core plate is vertically disposed in the middle of the end plate, the end plate is fixedly connected to the core plate, the two sides of the core plate are serrated, the two sides of the constraint plate are serrated, and the side of the limiting plate that is in contact with the core plate is serrated.

[0007] Furthermore, the core plate has first protrusions symmetrically arranged on both sides of the core plate. Multiple first protrusions are arranged on each side of the core plate. The cross-section of the first protrusion is triangular. A first groove is formed at the connection between two adjacent first protrusions. The cross-section of the first protrusion and the cross-section of the first groove are matched to form a sawtooth shape.

[0008] Furthermore, a gap is provided between the constraint plate and the core plate. Second protrusions are symmetrically arranged in the middle of the two side surfaces of the constraint plate. The cross-sectional shape of the second protrusions is triangular. Multiple second protrusions are provided on each side surface of the constraint plate. A second groove is formed between adjacent second protrusions near the middle of the constraint plate. A third groove is formed between adjacent second protrusions near both ends of the constraint plate. The third grooves at both ends of the constraint plate are respectively aligned with the first grooves on the same side surface of the two core plates. The cross-sections of the second protrusions, the second grooves, and the third grooves are fitted together to form a sawtooth shape.

[0009] Furthermore, the side surface of the limiting plate away from the core component is flat, and the side surface of the limiting plate close to the core component is provided with multiple fourth grooves. The cross-section of the fourth groove is triangular. A third protrusion is formed between adjacent fourth grooves near both ends of the limiting plate, and a fourth protrusion is formed between adjacent fourth grooves near the middle of the limiting plate. The cross-sections of the third protrusion, the fourth groove, and the fourth protrusion are matched to form a sawtooth shape.

[0010] Furthermore, the third protrusions at both ends of the limiting plate respectively engage with the first grooves on the two core plates, the fourth groove on the limiting plate respectively engages with the first protrusions on the two core plates, the second protrusion on the constraint plate is aligned with the first protrusions on the two core plates, the third protrusion engages with the third groove, the fourth groove engages with the second protrusion, and the fourth protrusion engages with the second groove.

[0011] Furthermore, the connecting assembly includes a fixing plate and ear plates. The fixing plate is fastened to the end plate by short bolts, and ear plates are spaced apart on the middle of the side surface of the fixing plate away from the core assembly.

[0012] Furthermore, a first pin hole is provided in the middle of the third groove, and a second pin hole is provided in the middle of the third protrusion. The first pin hole and the second pin hole are aligned, and the long bolt passes through the first pin hole and the second pin hole.

[0013] Furthermore, the annular spring is fixed to one side of the limiting plate with a flat surface by a long bolt. The annular spring includes an outer ring and an inner ring, with the inner ring inserted into the openings at both ends of the outer ring.

[0014] Furthermore, the inner surfaces at both ends of the outer ring are conical surfaces, and the outer surface of the inner ring is a conical surface. The taper of the inner conical surface of the outer ring is equal to the taper of the outer conical surface of the inner ring. A third pin hole is provided in the middle of the inner ring, and the long bolt passes through the third pin hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention provides a self-resetting variable friction energy dissipation device with a ring spring. The serrated surface between the core plate and the limiting plate can provide energy dissipation capacity for the entire device. The ring spring has superelastic properties, which effectively improves the self-resetting capacity of the components. The combination of energy dissipation and self-resetting capacity can effectively reduce the damage and residual displacement of structural components during earthquakes, which is beneficial to improving the seismic toughness of building structures.

[0017] 2. The present invention provides a self-resetting variable friction energy dissipation device with a ring spring. Each component in the device has a high degree of independence and is replaceable. When a component is damaged, only the corresponding damaged component needs to be replaced. The high degree of independence between the components greatly improves the repair efficiency of the entire device and can quickly restore the normal function of the entire device.

[0018] 3. The present invention provides a self-resetting variable friction energy dissipation device with a ring spring. The sawtooth surfaces set between the core plate and the limiting plate, and between the limiting plate and the constraint plate, can precisely control the energy dissipation capacity of the device by changing the inclination of the inclined surface and the dynamic friction coefficient of the mating surface during processing, and by adjusting the magnitude of the bolt preload during installation. The gap between the constraint plate and the core plate ensures that the core plate can not only generate axial deformation in the plane, but also generate lateral rotation in the plane, which reduces the probability of damage to the energy dissipation device to a certain extent.

[0019] 4. The present invention provides a self-resetting variable friction energy dissipation device with a ring spring. When the energy dissipation device is under tension or compression, displacement occurs between the core plate and the limiting plate. The serrated surface between the two causes the limiting plate to undergo overall displacement in the plane, which in turn increases the axial force on the bolt rod and the compressive force on the contact surface between the limiting plate and the core plate, thereby increasing the friction on the contact surface and increasing the energy dissipation capacity of the device. During reset, in addition to the external load, the superelastic inward compressive force of the ring spring will further improve the self-resetting capability of the device. Attached Figure Description

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

[0021] Figure 2 This is a schematic diagram of the disassembled structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the core board structure of the present invention;

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

[0024] Figure 5 This is a schematic diagram of the constraint plate structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the limiting plate structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the connection structure between the long bolt and the annular spring of the present invention;

[0027] Figure 8 This is a schematic diagram of the disassembly structure of the long bolt and the ring spring of the present invention.

[0028] In the diagram: 1. Core component; 11. Core plate; 111. First groove; 112. First protrusion; 12. End plate; 121. First connecting hole; 2. Connecting component; 21. Fixing plate; 211. Second connecting hole; 22. Ear plate; 221. Third connecting hole; 3. Ring spring; 31. Outer ring; 32. Inner ring; 33. Third pin hole; 4. Constraint plate; 41. First pin hole; 42. Second protrusion; 43. Second groove; 44. Third groove; 5. Limiting plate; 51. Second pin hole; 52. Third protrusion; 53. Fourth protrusion; 54. Fourth groove; 6. Fastening component; 61. Long bolt; 62. Short bolt. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the following description of the invention, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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. The term "connection" simply indicates a connection between devices and has no special meaning.

[0031] Furthermore, the technical fields and installation methods involved in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] For specific implementation examples, please refer to: Figures 1-6 A self-resetting variable friction energy dissipation device with a ring spring includes a core component 1, a connecting component 2, a ring spring 3, a constraint plate 4, a limiting plate 5, and a fastening component 6. Two connecting components 2 are symmetrically arranged vertically. The core component 1 is fixedly arranged between the two connecting components 2. Two core components 1 are symmetrically arranged, and a core plate 11 is provided on each core component 1. Two constraint plates 4 and two limiting plates 5 are each provided. The limiting plates 5 are symmetrically arranged on both sides of the core plate 11 and located between the two connecting components 2. The two constraint plates 4 are symmetrically arranged at both ends of the core plate 11 and located between the two limiting plates 5. The ring spring 3 is located outside the limiting plate 5. The fastening component 6 includes a long bolt 61 and a short bolt 62. The long bolt 61 fastens the limiting plate 5 to the constraint plate 4, and the short bolt 62 fastens the core component 1 to the connecting component 2. Each component in this device has a high degree of independence and is replaceable. When a component is damaged, only the corresponding damaged component needs to be replaced. The high degree of independence between the components greatly improves the repair efficiency of the entire device, allowing for rapid restoration of its normal function.

[0033] Furthermore, the core component 1 is also provided with an end plate 12, and the core plate 11 is vertically arranged in the middle of the end plate 12. The end plate 12 is fixedly connected to the core plate 11. The two sides of the core plate 11 are serrated, the two sides of the constraint plate 4 are serrated, and the side of the limiting plate 5 that is in contact with the core plate 11 is serrated.

[0034] Furthermore, first protrusions 112 are symmetrically arranged on both sides of the core plate 11. Multiple first protrusions 112 are arranged on each side of the core plate 11. The cross-section of the first protrusion 112 is triangular. A first groove 111 is formed at the connection between two adjacent first protrusions 112. The cross-section of the first protrusion 112 and the cross-section of the first groove 111 are matched to form a sawtooth shape.

[0035] Furthermore, an ear plate 22 is provided at intervals on the middle of the side surface of the fixing plate 21 away from the core component 1. A third connecting hole 221 is provided in the middle of the ear plate 22. The third connecting hole 221 can facilitate the connection of the energy-consuming device with other structural components through a pin.

[0036] Furthermore, the surface of the fixing plate 21 is provided with a plurality of second connecting holes 211, and the surface of the end plate 12 is provided with a plurality of first connecting holes 121. The second connecting holes 211 are aligned with the first connecting holes 121, and the short bolts 62 are inserted into the second connecting holes 211 and the first connecting holes 121 to fasten the end plate 12 to the fixing plate 21.

[0037] Furthermore, the annular spring 3 is fixed to the side of the limiting plate 5 with a flat surface by a long bolt 61. The annular spring 3 includes an outer ring 31 and an inner ring 32. The inner ring 32 is inserted into the openings at both ends of the outer ring 31. The inner surfaces at both ends of the outer ring 31 are conical, and the outer surfaces of the inner ring 32 are conical. The taper of the inner conical surface of the outer ring 31 is equal to the taper of the outer conical surface of the inner ring 32. The long bolt 61 passes through the annular spring 3, the limiting plate 5, the constraint plate 4, the limiting plate 5, and the annular spring 3 in sequence, so that the components are mutually constrained. The core plate 11 is set to the limiting plate 5. The serrated joints between plates 5 provide energy dissipation capacity for the entire device. The outer ring 31 can be made of SMA shape memory alloy or spring steel, while the inner ring 32 is made of spring steel. This gives the ring spring 3 superelastic properties and good load-bearing capacity, providing deformation, energy dissipation, and self-resetting driving force for the energy dissipation device under load. This effectively improves the self-resetting capacity of the components. The combination of energy dissipation and self-resetting capacity can effectively reduce the damage and residual displacement of structural components during earthquakes, which is beneficial to improving the seismic toughness of building structures.

[0038] Furthermore, a first pin hole 41 is provided in the middle of the third groove 44, and a second pin hole 51 is provided in the middle of the third protrusion 52. The first pin hole 41 and the second pin hole 51 are aligned. A third pin hole 33 is provided in the middle of the inner ring 32. A long bolt 61 is inserted into the third pin hole 33, the first pin hole 41 and the second pin hole 51 to fasten the ring spring 3, the limiting plate 5 and the constraint plate 4.

[0039] Furthermore, the surface of the limiting plate 5 away from the core component 1 is flat, and the surface of the limiting plate 5 near the core component 1 is provided with a plurality of fourth grooves 54. The cross-section of the fourth grooves 54 is triangular. A third protrusion 52 is formed between adjacent fourth grooves 54 near both ends of the limiting plate 5, and a fourth protrusion 53 is formed between adjacent fourth grooves 54 near the middle of the limiting plate 5. The cross-sections of the third protrusion 52, the fourth groove 54, and the fourth protrusion 53 are fitted together to form a sawtooth shape. The third protrusions 52 at both ends of the limiting plate 5 respectively engage with the first grooves 111 on the two core plates 11, and the fourth grooves 54 on the limiting plate 5 respectively engage with the first protrusions 112 on the two core plates 11.

[0040] Furthermore, a gap is reserved between the constraint plate 4 and the core plate 11. In this embodiment, the gap value is 3mm. Second protrusions 42 are symmetrically arranged in the middle of the two side surfaces of the constraint plate 4. The cross-sectional shape of the second protrusions 42 is triangular. Multiple second protrusions 42 are provided on each side surface of the constraint plate 4. A second groove 43 is formed between two adjacent second protrusions 42 near the middle of the constraint plate 4. A third groove 44 is formed between adjacent second protrusions 42 near both ends of the constraint plate 4. The third grooves 44 at both ends of the constraint plate 4 are respectively aligned with the first grooves 111 on the same side surface of the two core plates 11. The constraint plate 4 can prevent the core plate 11 from rotating laterally under load. The second protrusions 42 on the constraint plate 4 are respectively aligned with the first protrusions 112 on the two core plates 11. The third protrusion 52 cooperates with the third groove 44, the fourth groove 54 cooperates with the second protrusion 42, and the fourth protrusion 53 cooperates with the second groove 43.

[0041] The serrated surfaces between the core plate 11 and the limiting plate 5, and between the limiting plate 5 and the constraint plate 4, allow for precise control of the energy consumption capacity of the device by changing the inclination of the inclined surfaces and the dynamic friction coefficient of the mating surfaces during processing, and by adjusting the bolt preload during installation. The gap between the constraint plate 4 and the core plate 11 ensures that the core plate 11 can not only undergo axial deformation in the plane, but also lateral rotation in the plane, which reduces the probability of damage to the energy consumption device to a certain extent.

[0042] When a self-resetting variable friction energy dissipation device with a ring spring is in use, the third connecting hole 221 of the ear plate 22 is connected to the core force-bearing nodes such as the column base and beam-column joint through a pin. Under load, the structural components drive the core component 1 to move through the connecting assembly 2, causing displacement between the limiting plate 5 and the core plate 11, and between the limiting plate 5 and the constraint plate 4. At this time, the friction generated between the third protrusion 52 and the first groove 111, between the fourth groove 54 and the first protrusion 112, and between the connecting groove formed between the two first protrusions 112 after the two core plates 11 are aligned and the fourth protrusion 53 can limit the displacement of the core plate 11. At the same time, the friction between the third protrusion 52 and the third groove 44, and between the fourth groove 54 and the second protrusion 42, can also limit the displacement of the core plate 11. The friction between the fourth protrusion 53 and the second groove 43 can further limit the displacement of the core plate 11. At the same time, the constraint plate 4 can also prevent the core plate 11 from rotating laterally. On the other hand, during the displacement of the core component 1 driven by the connecting component 2, the sawtooth structure will cause the limiting plate 5 to translate in the plane, which will cause the inner ring 32 to generate a squeezing effect, resulting in the outer ring 31 expanding outward. When the super-elastic outer ring 31 expands outward, it will increase the preload of the long bolt 61, thereby increasing the friction between the limiting plate 5 and the core plate 11 and improving the energy dissipation performance of the energy dissipation device. This variable friction principle can effectively suppress the excessive displacement of the core plate 11 under load, and at the same time, it can generate good energy dissipation capacity during the bearing process. During use, when the energy-consuming device is under tension or compression, displacement occurs between the core plate 11 and the limiting plate 5. The serrated surfaces that fit between the two cause the limiting plate 5 to move as a whole in the plane, which in turn increases the axial force on the bolts and the compressive force on the mating surfaces of the limiting plate 5 and the core plate 11. This increases the friction on the mating surfaces and increases the energy consumption capacity of the device. In addition to the external load, the inward compressive force of the superelastic outer ring 31 during reset further enhances the self-reset capability of the device.

Claims

1. A self-resetting variable friction energy dissipation device with a ring spring, characterized in that: The assembly includes a core component (1), a connecting component (2), a ring spring (3), a constraint plate (4), a limiting plate (5), and a fastening component (6). There are two connecting components (2) arranged symmetrically on the top and bottom. The core component (1) is fixedly arranged between the two connecting components (2). There are two core components (1) arranged symmetrically. A core plate (11) is provided on the core component (1). There are two constraint plates (4) and two limiting plates (5). The limiting plates (5) are symmetrically arranged on both sides of the core plate (11) and located between the two connecting components (2). The two constraint plates (4) are symmetrically arranged at both ends of the core plate (11) and located between the two limiting plates (5). The ring spring (3) is located on the outside of the limiting plate (5). The fastening component (6) includes a long bolt (61) and a short bolt (62). The long bolt (61) fastens the limiting plate (5) to the constraint plate (4). The short bolt (62) fastens the core component (1) to the connecting component (2). The core component (1) is also provided with an end plate (12), the core plate (11) is vertically arranged in the middle of the end plate (12), the end plate (12) is fixedly connected to the core plate (11), the two sides of the core plate (11) are serrated, the two sides of the constraint plate (4) are serrated, and the side of the limiting plate (5) that is in contact with the core plate (11) is serrated. The core plate (11) has symmetrically arranged first protrusions (112) on both sides. Multiple first protrusions (112) are arranged on each side surface of the core plate (11). The cross-section of the first protrusion (112) is triangular, and a first groove (111) is formed at the connection between two adjacent first protrusions (112). The cross-section of the first protrusion (112) and the cross-section of the first groove (111) are matched to form a sawtooth shape; A gap is provided between the constraint plate (4) and the core plate (11). Second protrusions (42) are symmetrically arranged in the middle of the two side surfaces of the constraint plate (4). The cross-sectional shape of the second protrusions (42) is triangular. Multiple second protrusions (42) are provided on each side surface of the constraint plate (4). A second groove (43) is formed between adjacent second protrusions (42) near the middle of the constraint plate (4). A third groove (44) is formed between adjacent second protrusions (42) near both ends of the constraint plate (4). The third grooves (44) at both ends of the constraint plate (4) are aligned with the first grooves (111) on the same side surface of the two core plates (11). The cross-sections of the second protrusions (42), the second grooves (43), and the third grooves (44) are fitted together to form a sawtooth shape. The side surface of the limiting plate (5) away from the core component (1) is flat, and the side surface of the limiting plate (5) near the core component (1) is provided with a plurality of fourth grooves (54). The cross section of the fourth groove (54) is triangular. A third protrusion (52) is formed between adjacent fourth grooves (54) near the two ends of the limiting plate (5), and a fourth protrusion (53) is formed between adjacent fourth grooves (54) near the middle of the limiting plate (5). The cross sections of the third protrusion (52), the fourth groove (54), and the fourth protrusion (53) are fitted together to form a sawtooth shape. The third protrusions (52) at both ends of the limiting plate (5) respectively cooperate with the first grooves (111) on the two core plates (11), the fourth groove (54) on the limiting plate (5) respectively cooperate with the first protrusions (112) on the two core plates (11), the second protrusion (42) on the constraint plate (4) is aligned with the first protrusions (112) on the two core plates (11), the third protrusion (52) cooperates with the third groove (44), the fourth groove (54) cooperates with the second protrusion (42), and the fourth protrusion (53) cooperates with the second groove (43). The annular spring (3) is fixed to one side of the limiting plate (5) with a flat surface by a long bolt (61). The annular spring (3) includes an outer ring (31) and an inner ring (32). The inner ring (32) is inserted into the openings at both ends of the outer ring (31). The inner surfaces of both ends of the outer ring (31) are conical, and the outer surface of the inner ring (32) is conical. The taper of the inner conical surface of the outer ring (31) is equal to the taper of the outer conical surface of the inner ring (32). A third pin hole (33) is provided in the middle of the inner ring (32), and the long bolt (61) passes through the third pin hole (33).

2. The self-resetting variable friction energy dissipation device with an annular spring according to claim 1, characterized in that: The connecting assembly (2) includes a fixing plate (21) and an ear plate (22). The fixing plate (21) is fastened to the end plate (12) by short bolts (62). The ear plate (22) is provided at intervals on the middle part of the side surface of the fixing plate (21) away from the core assembly (1).

3. The self-resetting variable friction energy dissipation device with an annular spring according to claim 1, characterized in that: The third groove (44) has a first pin hole (41) in the middle, and the third protrusion (52) has a second pin hole (51) in the middle. The first pin hole (41) and the second pin hole (51) are aligned, and the long bolt (61) passes through the first pin hole (41) and the second pin hole (51).

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