Self-resetting damper device with multi-stage energy consumption mechanism

Abstract

The invention relates to a self-resetting damper device with a multistage energy consumption mechanism, which comprises a base and a top seat, a dowel bar is fixed on the base, a disc spring is sleeved on the dowel bar between an upper side disc spring baffle plate and a lower side disc spring baffle plate, a U-shaped energy consumption piece is arranged between the top seat and the upper side disc spring baffle plate, and the U-shaped energy consumption piece is connected with the top seat. A plurality of upper side ribs arranged at intervals in the circumferential direction are arranged at the lower end of the top seat, rib long holes extending in the vertical direction are formed in the upper side ribs, the two circumferential sides of each upper side rib are opposite upper side friction faces, and disc spring protection plates located between every two adjacent upper side ribs are fixed to the base. Friction plates parallel to the corresponding upper side friction faces are arranged at the two circumferential ends of the disc spring protection plates, friction plate long holes extending in the vertical direction are formed in the friction plates, and protection plate bolts for connecting the adjacent friction plates of every two adjacent disc spring protection plates in the circumferential direction are installed in the rib long holes of the upper side ribs in a penetrating mode. The damper device provided by the invention can realize multi-stage energy consumption and has good self-resetting capability.

Description

Technical Field

[0001] The invention relates to the technical field of energy dissipation and shock absorption in building construction, and in particular to a self-resetting damper device with a multi-level energy consumption mechanism. Background Art

[0002] Traditional ductile earthquake-resistant structures rely on their own damage and plastic deformation to dissipate earthquake energy. This approach often makes it difficult to repair the structure after an earthquake, increasing maintenance costs. To solve this problem, the design concept of energy dissipation and shock absorption can be adopted. By installing dampers in the structure to dissipate earthquake energy, the structural damage of the components can be effectively reduced.

[0003] Residual displacement is an important technical indicator that affects the safety performance of structures. In engineering structures, the residual displacement of structures is often reduced by installing steel strands and shape memory alloy elements. However, although conventional dampers can improve the energy dissipation and shock absorption capacity of structures, they usually do not have self-recovery capabilities and have little effect on the residual displacement of controlled structures. Therefore, if the damper can not only reduce the response of the structure under earthquake action through its energy dissipation mechanism, but also reduce the residual displacement of the structure after the earthquake through its self-recovery ability, this is very important for improving the seismic toughness of the structure and reducing the maintenance cost after the earthquake. Summary of the invention

[0004] The object of the present invention is to provide a damper device which can realize multi-stage energy consumption and has good self-resetting capability.

[0005] In order to solve the above technical problems, the technical solution of a self-resetting damper device with a multi-stage energy dissipation mechanism in the present invention is as follows: A self-resetting damper device with a multi-stage energy consumption mechanism comprises a base and a top seat, a force transmission rod is fixed on the base, an upper disc spring baffle and a lower disc spring baffle are arranged on the force transmission rod, a disc spring is sleeved between the upper disc spring baffle and the lower disc spring baffle on the force transmission rod, a plurality of U-shaped energy absorbing parts made of shape memory alloy arranged at intervals along the circumferential direction are arranged between the top seat and the upper disc spring baffle force plate, at least two upper ribs arranged at intervals along the circumferential direction and located on the outer periphery of the disc spring are arranged at the lower end of the top seat, Each upper rib is provided with a long rib hole extending in the up-down direction, the circumferential sides of the upper rib are upper friction surfaces facing away from each other, a disc spring guard plate located between two adjacent upper ribs is fixed on the base, the circumferential ends of the disc spring guard plate have friction plates contacting and cooperating with the corresponding upper friction surfaces, the friction plate is provided with a long friction plate hole extending in the up-down direction, and guard plate bolts connecting adjacent friction plates of two circumferentially adjacent disc spring guard plates are passed through the long rib holes of the upper ribs.

[0006] Furthermore, the base is a cross-shaped structure composed of base rods arranged horizontally and vertically, the force transmission rod is fixed at the center position of the base, and the bottoms of the two friction plates of the disc spring guard are fixed to the adjacent sides of the adjacent base rods by fixing bolts.

[0007] Furthermore, the top seat is a cross-shaped structure composed of top seat rods arranged crosswise in the horizontal and vertical directions, and each upper rib is integrally arranged on the lower side of the corresponding top seat rod.

[0008] Furthermore, there are at least two disc springs, and the disc springs are arranged sequentially in the up and down directions.

[0009] Furthermore, a lower nut located at the lower side of the lower disc spring baffle and an upper nut located at the upper side of the upper disc spring baffle are threadedly connected on the force transmission rod.

[0010] Furthermore, an upper receiving hole for accommodating an upper nut is formed between the upper ends of the upper ribs, and the lower end hole opening of the upper receiving hole is pressed against the upper end of the upper disc spring baffle; a lower receiving hole for accommodating a lower nut is formed between the lower ends of the upper ribs, and the upper end hole opening of the lower receiving hole is pressed against the lower end of the lower disc spring baffle.

[0011] Furthermore, the U-shaped energy absorbing part is located in the upper accommodating hole on the upper side of the upper nut, and each U-shaped energy absorbing part is circumferentially arranged on the periphery of the force transmission rod. The upper side wall of the U-shaped energy absorbing part is fixed to the bottom of the top seat by the upper side bolts of the energy absorbing part, and the lower side arm of the U-shaped energy absorbing part is fixed to the upper end of the upper nut by the lower side bolts of the energy absorbing part.

[0012] The beneficial effects of the present invention are as follows: when an earthquake occurs, the relative displacement of components in the building structure is an important indicator for the shock absorption system. At the place of vibration, the disc spring and the U-shaped energy absorbing member are pre-tightened by their own elastic force, and the upper ribs and the disc spring guard plates on both sides thereof are fixed by corresponding guard plate bolts, that is, the two adjacent upper ribs and the disc spring guard plates therebetween are in a relatively fixed relationship, and the static friction between them is used to achieve primary shock absorption; as the vibration continues, the top seat is displaced relative to the base, and while the U-shaped energy absorbing member is elastically deformed, relative sliding friction is generated between the upper friction surface and the disc spring guard plate, and the elastic deformation of the U-shaped energy absorbing member and the sliding friction between the upper friction surface and the disc spring guard plate achieve secondary shock absorption; as the vibration continues to increase, the disc spring also participates in the shock absorption action through axial deformation, thereby achieving tertiary shock absorption; after the vibration ends, the entire self-resetting damper device is reset to the initial state by relying on the reset force of the disc spring and the U-shaped energy absorbing member, thereby achieving multi-level energy absorption and self-reset at the same time, effectively reducing the structural damage of the component. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 is a schematic structural diagram of embodiment 1 of the present invention; Figure 2 yes Figure 1 Stereoscopic image of Figure 3 yes Figure 1 Schematic diagram of the structure of the disc spring under tension when the middle disc spring guard plate and U-shaped energy dissipation part are not shown; Figure 4 yes Figure 3 Stereoscopic image of Figure 5 yes Figure 1 Schematic diagram of the structure of the disc spring under pressure when the middle disc spring guard plate and the U-shaped energy dissipation part are not shown; Figure 6 yes Figure 5 The schematic diagram showing the status of the U-shaped energy absorbing part; Figure 7 yes Figure 6 Stereoscopic image of Figure 8 yes Figure 7 A perspective view of the disc spring guard is shown in FIG. Fig. 9 yes Figure 7 A top view of Fig.10 yes Figure 1 Structural schematic diagram of the U-shaped energy dissipation part; Fig.11 yes Figure 1 Schematic diagram of the structure of the middle disc spring guard; Fig.12 is a top view of a self-resetting damper device in Embodiment 2 of the present invention; Fig.13 is a top view of a self-resetting damper device in Embodiment 3 of the present invention; 1. Disc spring; 2. Force transmission rod; 3. Upper nut; 4. Upper disc spring baffle; 5. U-shaped energy absorbing part; 5-1. Upper arm of U-shaped energy absorbing part; 5-2. Lower arm of U-shaped energy absorbing part; 6. Lower bolt of energy absorbing part; 7. Top seat; 8. Base; 9. Rib long hole; 10. Disc spring guard plate; 11. Guard plate bolt; 12. Fixing bolt; 13. Top seat bolt; 14. Upper rib; 15. Friction plate; 16. Top seat rod; 17. Base rod; 18. Friction plate long hole; 19. Upper accommodating hole; 20. Lower accommodating hole; 21. Lower disc spring baffle; 22. Lower nut; 23. Upper bolt of energy absorbing part. DETAILED DESCRIPTION

[0014] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0015] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0016] Embodiment 1 of a self-resetting damper device with a multi-stage energy dissipation mechanism in the present invention is as follows Figures 1 to 11 As shown: it includes a base 8 and a top seat 7. When in use, the top seat 7 is connected to the top seat bolts 13, and the base 8 is connected to the base bolts to fix the top seat and the base between corresponding building components.

[0017] The base and the top seat are both cross-shaped structures. Specifically, the base is a cross-shaped structure composed of base rods 17 arranged in a horizontal and vertical cross-arrangement, and the top seat is a cross-shaped structure composed of top seat rods 16 arranged in a horizontal and vertical cross-arrangement.

[0018] A vertically arranged force transmission rod 2 is fixed at the center of the base, and an upper disc spring baffle 4 and a lower disc spring baffle 21 are sleeved on the force transmission rod 2. A disc spring 1 is sleeved between the upper disc spring baffle and the lower disc spring baffle on the force transmission rod. There are multiple disc springs, and the multiple disc springs are arranged in sequence along the up and down directions to form a disc spring group. An upper nut 3 is threadedly connected to the upper side of the upper disc spring baffle on the force transmission rod, and a lower nut 22 is threadedly connected to the lower side of the lower disc spring baffle on the force transmission rod.

[0019] A plurality of U-shaped energy absorbing parts 5 made of shape memory alloy and arranged at intervals along the circumference are arranged between the top seat and the upper disc spring baffle force plate. In this embodiment, there are four U-shaped energy absorbing parts 5, and each U-shaped energy absorbing part is evenly spaced along the circumference of the force transmission rod. The U-shaped energy absorbing part includes an upper arm and a lower arm. The upper arm 5-1 of the U-shaped energy absorbing part and the lower arm 5-2 of the U-shaped energy absorbing part are arranged in parallel up and down. The upper side wall of the U-shaped energy absorbing part is fixed to the bottom of the top seat by the upper side bolt 23 of the energy absorbing part, and the lower side arm of the U-shaped energy absorbing part is fixed to the upper end of the upper nut 3 by the lower side bolt of the energy absorbing part.

[0020] The lower end of the top seat is provided with four upper ribs 14 which are arranged at intervals along the circumferential direction and are located on the periphery of the disc spring. Each upper rib 14 is integrally provided on the lower side of the corresponding top seat rod 16 . Each upper rib is provided with a rib long hole 9 extending in the up-down direction, and the rib long hole 9 penetrates the upper rib along the circumference of the upper rib, and the circumferential sides of the upper rib are upper friction surfaces facing back to back, that is, the two upper friction surfaces of each upper rib are arranged side by side, and a disc spring guard plate 10 located between two adjacent upper ribs is fixed on the base, and the disc spring guard plate includes an arc plate located on the outer side of the corresponding disc spring, the arc plate and the disc spring are coaxially arranged, and the circumferential ends of the arc plate have friction plates 15 that contact and cooperate with the corresponding upper friction surfaces, and the friction plate 15 is provided with friction plate long holes 18 extending in the up-down direction, and the rib long holes of the upper rib 14 are penetrated by guard plate bolts 11 that connect adjacent friction plates of two circumferentially adjacent disc spring guards, that is, the middle part of the guard plate bolt is penetrated in the rib long hole of the upper rib, and the two ends of the guard plate bolt are penetrated in the friction plate long holes of the two adjacent friction plates. The arc-shaped plate structure can prevent external particles from entering the disc spring during an earthquake and affecting the normal use of the disc spring.

[0021] The bottoms of the two friction plates of the disc spring guard are fixed to the adjacent sides of the adjacent base rods by fixing bolts 12. The two circumferentially adjacent disc spring guards share a set of fixing bolts. The middle parts of the fixing bolts are installed on the corresponding base rods, and the two ends of the fixing bolts 12 are installed on the adjacent friction plates of the two circumferentially adjacent disc spring guards.

[0022] An upper receiving hole 19 for accommodating an upper nut is formed between the upper ends of the upper ribs, and the lower end opening of the upper receiving hole is pressed against the upper end of the upper disc spring baffle 4; a lower receiving hole 20 for accommodating a lower nut is formed between the lower ends of the upper ribs 14, and the upper end opening of the lower receiving hole 20 is pressed against the lower end of the lower disc spring baffle 21.

[0023] The present invention provides a self-resetting damper device with a multi-stage energy dissipation mechanism. Under the action of small and medium earthquakes, the friction plate slides relatively and enters an energy dissipation state; as the earthquake action continues to increase, the U-shaped energy dissipation part yields and dissipates energy, and works together with the friction energy dissipation component to dissipate the seismic energy. It should be noted that the disc spring group continues to provide restoring force throughout the entire earthquake process, which can effectively reduce the residual displacement of the energy dissipation component and realize the resetting ability of the damper. The above-mentioned self-resetting damper device can be applied to column bases and wall corners in engineering structures, and can also be used as an energy dissipation element for structural seismic reinforcement, realizing graded energy dissipation and resetting functions under different earthquake actions, which can effectively control structural damage and improve the seismic performance of the structure.

[0024] When an earthquake occurs, the relative displacement of components in the building structure is an important indicator for the shock absorption system. The combination of disc springs and U-shaped energy-absorbing parts provides an effective multi-stage shock absorption mechanism. When the vertical displacement is transmitted downward through the force transfer rod, the force transfer rod drives the disc spring guard plate on the base to generate sliding friction, thereby achieving a second buffer shock absorption. This mechanism reduces the transmission of seismic force by increasing the flexibility of the structure, thereby reducing the response of the structure. Then, when the vertical displacement acts on the disc spring assembly, the disc spring achieves the first buffer shock absorption through elastic deformation. The nonlinear load-deformation curve of the disc spring enables it to be adjusted according to the ratio of the cone height to the thickness ( h 0 / t ) to design a specific load curve, which can be an increasing, decreasing or buffering curve. Finally, when the vertical displacement reaches a certain value, the U-shaped energy dissipation part begins to exert its superelastic characteristics to achieve the third buffer shock absorption. Shape memory alloy (SMA) has a unique superelasticity, which can produce a strain much larger than its elastic limit strain under the action of external stress, and the strain can be partially or completely automatically restored when unloading. The superelastic phenomenon of this material is a manifestation of stress-induced martensitic phase transformation. During the superelastic deformation process, the material exhibits damping adjustability and high energy dissipation capacity.

[0025] Disc spring is a very effective shock absorbing element with the advantages of small size, large load-bearing capacity, strong buffering and shock absorbing capabilities. Different load and deformation characteristics can be obtained by using different combinations. Due to the surface friction damping effect, the impact absorption and energy dissipation capabilities are more obvious. It is very suitable for occasions with compact axial space, wide lateral space and large load.

[0026] Shape memory alloy (SMA) is indeed a smart material that can realize the self-reset capability of dampers and even structural systems at the material level. It can have a "flag-shaped" hysteresis curve at room temperature and spontaneously restore nonlinear deformation while consuming energy. The superelastic properties of SMA make it perform well in dissipating earthquake energy. It can provide additional damping and additional stiffness to the structure, which is crucial for earthquake-resistant structures.

[0027] Embodiment 2 of a self-resetting damping device with a multi-stage energy dissipation mechanism is as follows Fig.12 As shown: the difference between Example 2 and Example 1 is that there are two upper ribs and four upper friction surfaces in the present invention.

[0028] Embodiment 3 of a self-resetting damping device with a multi-stage energy dissipation mechanism is as follows Fig.13 As shown: Example 3 is different from Example 1 in that there are three upper ribs and six upper friction surfaces in the present invention.

[0029] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0030] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0031] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-resetting damper device with a multi-stage energy consumption mechanism, characterized in that: The invention comprises a base and a top seat, a force transmission rod is fixed on the base, an upper disc spring baffle and a lower disc spring baffle are arranged on the force transmission rod, a disc spring is sleeved on the force transmission rod between the upper disc spring baffle and the lower disc spring baffle, a plurality of U-shaped energy absorbing parts made of shape memory alloy and arranged at intervals along the circumferential direction are arranged between the top seat and the upper disc spring baffle force plate, at the lower end of the top seat is provided with at least two upper ribs arranged at intervals along the circumferential direction and located at the periphery of the disc spring, each upper rib is provided with a rib long hole extending in the up-down direction, the circumferential sides of the upper rib are upper friction surfaces facing the back, a disc spring guard plate located between two adjacent upper ribs is fixed on the base, the circumferential ends of the disc spring guard plate have friction plates contacting and cooperating with the corresponding upper friction surfaces, the friction plate is provided with a friction plate long hole extending in the up-down direction, and the rib long hole of the upper rib is penetrated with a guard plate bolt connecting adjacent friction plates of two adjacent disc spring guard plates in the circumferential direction.

2. The self-resetting damper device according to claim 1, characterized in that: The base is a cross-shaped structure composed of base rods arranged horizontally and vertically. The force transmission rod is fixed at the center of the base, and the bottoms of the two friction plates of the disc spring guard are fixed to the adjacent sides of the adjacent base rods by fixing bolts.

3. The self-resetting damper device according to claim 1, characterized in that: The top seat is a cross-shaped structure composed of top seat rods arranged crosswise in the horizontal and vertical directions, and each upper rib is integrally arranged on the lower side of the corresponding top seat rod.

4. The self-resetting damper device according to claim 1, characterized in that: There are at least two disc springs, and the disc springs are arranged sequentially along the up and down directions.

5. The self-resetting damper device according to any one of claims 1 to 4, characterized in that: The force transmission rod is threadedly connected with a lower nut located at the lower side of the lower disc spring baffle and an upper nut located at the upper side of the upper disc spring baffle.

6. The self-resetting damper device according to claim 4, characterized in that: An upper receiving hole for accommodating the upper nut is formed between the upper ends of the upper ribs, and the lower end hole opening of the upper receiving hole is pressed against the upper end of the upper disc spring baffle; a lower receiving hole for accommodating the lower nut is formed between the lower ends of the upper ribs, and the upper end hole opening of the lower receiving hole is pressed against the lower end of the lower disc spring baffle.

7. The self-resetting damper device according to claim 6, characterized in that: The U-shaped energy absorbing member is located in the upper accommodating hole on the upper side of the upper nut, and each U-shaped energy absorbing member is circumferentially arranged on the periphery of the force transmission rod. The upper side wall of the U-shaped energy absorbing member is fixed to the bottom of the top seat by the upper side bolts of the energy absorbing member, and the lower side arm of the U-shaped energy absorbing member is fixed to the upper end of the upper nut by the lower side bolts of the energy absorbing member.

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