Multi-stage variable-friction mild steel damper
By introducing a multi-stage variable friction mechanism into the soft steel damper, combining the friction damper and the metal damper, the problems of energy consumption during small and medium vibrations in the existing technology are solved, and the energy consumption effect is poor during medium and large vibrations are achieved, and multi-stage Energy consumption improves the adaptability and performance of the damper.
Patent Information
- Application Number
- CN202420925799.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The existing mild steel dampers only provide stiffness without energy consumption during small vibrations, and have a single energy consumption mechanism, resulting in easy structure damage; the energy consumption effect is poor under medium and large vibration intensity.
A multi-stage variable friction mild steel damper is designed, combining the friction damping part and the metal damping part, and using friction plates and steel plate groups of different bending degrees to achieve multi-stage energy consumption and adapt to the energy consumption needs under different vibration intensity. The friction damping part consumes energy through friction during small vibration, and increases friction as the vibration intensity increases; the metal damping part consumes energy through yield and shear deformation during medium and large vibration, and achieves the best energy consumption effect step by step.
It realizes multi-stage energy consumption during small vibration, extends the service life of the structure, and adapts to different vibration conditions through a multi-stage energy consumption mechanism during medium and large vibrations, improving the compatibility and performance of the damper, ensuring the safety of the structure. .
Smart Images
Figure CN222252608U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dampers, in particular to a multi-stage variable friction soft steel damper. Background Art
[0002] Mild steel dampers are usually made of low yield stress steel and are a type of energy dissipation and shock absorption device in passive structural control. During earthquakes or wind vibrations, the energy input into the structure is dissipated through plastic yield hysteresis deformation of the mild steel, thereby achieving the purpose of shock absorption.
[0003] In the prior art, soft steel dampers can usually only consume energy in a single item, and the energy consumption mechanism is single; on the one hand, before reaching the yield point of the soft steel, that is, under small vibration intensity, the soft steel damper only provides stiffness without consuming energy, and only the main structure bears the seismic energy, which can easily cause damage to the structure and affect its service life; on the other hand, under medium and large vibration intensities, the damper reaches the yield point of the soft steel, and the soft steel yields and shears to consume energy. The energy consumption mechanism is single and the energy consumption effect is poor. Utility Model Content
[0004] In view of this, the utility model provides a multi-stage variable friction soft steel damper to solve the problem that the existing soft steel damper only provides stiffness without energy consumption under small earthquakes and has a single energy consumption mechanism.
[0005] The utility model provides a multi-stage variable friction mild steel damper, comprising: a friction damping part, comprising an upper plate, a lower plate, and a friction plate clamped between the upper plate and the lower plate; friction coatings are provided on the plate surfaces on both sides of the friction plate; a metal damping part, comprising at least two connecting plates, and a first plate group, a second plate group and a third plate group arranged between the at least two connecting plates; the first plate group comprises at least two first arc plates, the second plate group comprises at least two second arc plates, the curvature of the first arc plate is greater than the curvature of the second arc plate, and the third plate group comprises at least two straight plates; the metal damping part is sandwiched and fixed between at least two of the friction damping parts, and the plate body of the friction damping part on one side away from the metal damping part is suitable for connection with a main structure; wherein the friction damping part is suitable for friction energy consumption under small vibration intensity, and the friction force increases with the increase of vibration intensity; the metal damping part is suitable for energy consumption under medium vibration intensity and large vibration intensity, and the first plate group, the second plate group and the third plate group consume energy in sequence according to the yield order.
[0006] Beneficial effect: By setting up a matching friction damping part and a metal damping part, the purpose of the damper using friction energy dissipation under small earthquakes and having multiple energy dissipation stages is achieved, thereby solving the defects of the prior art in that the energy dissipation mechanism is single and the substrate is not damaged by energy dissipation during small vibrations. When the friction damping part is in use, as the vibration intensity gradually increases, the displacement between the upper plate and the friction plate or the friction plate and the lower plate increases accordingly. When the displacement reaches a certain level and enters the high-friction material part, the friction coefficient increases, the friction force rises, and the friction energy dissipation effect also continues to increase, thereby obtaining a variable friction damper that gradually increases the energy dissipation effect as the vibration progresses, which is highly practical. At the same time, the friction damping part obtains a two-way displacement friction energy dissipation capacity, which is suitable for a variety of different earthquake vibration conditions and has strong compatibility.
[0007] Beneficial effects: By setting a steel plate group with different bending degrees and different materials, energy-absorbing steel plates with a variety of different yield strengths are obtained, so that the damper has a variety of different buckling points or shear points, as well as multiple energy-absorbing stages; when absorbing energy by buckling, the damper consumes energy step by step according to the magnitude of the vibration intensity, and the energy-absorbing mechanism is more adapted to the actual vibration situation. The gradual multi-stage energy-absorbing process is reasonable and efficient, and it can also automatically enter the corresponding energy-absorbing stage, and has strong performance; by setting the yield degree of the steel plate group and the friction coefficient of the friction damping part, the maximum friction force of the friction damping part is connected with the shear and buckling energy-absorbing starting points of the steel plate damper, so as to ensure the continuity of the overall energy-absorbing process, and at the same time, the energy is absorbed by the damper to the maximum extent, thereby ensuring the safety of the structural theme; by setting a bidirectional steel plate group, the metal damping part can dissipate energy in both directions, and by setting a bidirectional friction hole at the friction damping part, the friction damping part can realize bidirectional energy dissipation, which has strong adaptability and is easy to promote and use.
[0008] In an optional embodiment, at least two arc-shaped recesses of the first arc plates are disposed back to back in both directions; at least two arc-shaped recesses of the second arc plates are disposed back to back in both directions, which is suitable for making the metal damping part dissipate energy in both directions.
[0009] In an optional embodiment, the upper plate is provided with a plurality of upper friction holes, which extend along a first direction; the lower plate is provided with a plurality of lower friction holes, which extend along a second direction; the friction plate is provided with connecting holes, which correspond to the upper friction holes and the lower friction holes; wherein the fasteners are passed through the upper friction holes, the connecting holes and the lower friction holes in sequence and then fixed, so that the friction plate is clamped between the upper plate and the lower plate.
[0010] In an optional embodiment, the friction coating is coated on the friction plate at a position close to the connecting hole and enters the high friction material portion, so that the friction coefficient increases and the friction force increases.
[0011] In an optional embodiment, at least two of the first arc plates are respectively arranged on both sides of the midline; at least two of the second arc plates are respectively arranged on both sides of the midline; at least two of the straight plates are respectively arranged on both sides of the midline; wherein the notches of the first arc plate and the second arc plate located on the same side of the midline face the same direction.
[0012] In an optional embodiment, the first arc plate, the second arc plate, and the straight plate are all steel plates, and the steel plates on the same side of the midline are made of the same material, while the steel plates on both sides of the midline are made of different materials.
[0013] In an optional implementation, the maximum friction force of the friction damping portion corresponds to the minimum yield force of the metal damping portion.
[0014] In an optional embodiment, both the upper plate and the lower plate are provided with reserved holes, suitable for being fixed to the main structure or the connecting plate by means of the reserved holes.
[0015] In an optional embodiment, a side plate is provided between at least two of the connecting plates, and at least two side plates are respectively provided on both sides of the center line. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 It is a schematic diagram of the multi-stage variable friction mild steel damper of the utility model;
[0018] Figure 2 It is a schematic diagram of the upper plate of the utility model;
[0019] Figure 3 It is a schematic diagram of the friction plate of the utility model;
[0020] Figure 4 It is a schematic diagram of the lower plate of the utility model;
[0021] Figure 5 It is a schematic diagram of the first hole group of the utility model;
[0022] Figure 6 is a schematic diagram of the second hole group of the utility model;
[0023] Figure 7 It is a schematic diagram of the third hole group of the utility model.
[0024] Description of reference numerals:
[0025] 1. Friction damping part; 11. Upper plate; 111. Upper friction hole; 12. Lower plate; 121. Lower friction hole; 13. Friction plate; 131. Friction coating; 132. Connecting hole; 2. Metal damping part; 21. Connecting plate; 22. First arc plate; 23. Second arc plate; 24. Straight plate; 3. Fastener; 4. Center line; 5. Reserved hole; 6. Side plate. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0030] Combine the following Figures 1 to 7 , describing an embodiment of the utility model.
[0031] According to an embodiment of the utility model, a multi-stage variable friction mild steel damper is provided, comprising: a friction damping part 1, comprising an upper plate 11, a lower plate 12, and a friction plate 13 clamped between the upper plate 11 and the lower plate 12; a friction coating 131 is provided at the plate surface where the friction plate 13 is connected to the upper plate 11 or the lower plate 12, and the friction coating 131 is a high friction coating 131, which can increase the friction force between the friction plate 13 and the upper plate 11 or the lower plate 12; a metal damping part 2, comprising at least two connecting The connecting plates 21, and the first plate group, the second plate group and the third plate group arranged between at least two of the connecting plates 21; the first plate group includes at least two first curved plates 22, the second plate group includes at least two second curved plates 23, the curvature of the first curved plates 22 is greater than the curvature of the second curved plates 23, so that the yield strength of the first curved plates 22 is less than the yield strength of the second curved plates 23; the third plate group includes at least two straight plates 24, so that the yield strength of the second curved plates 23 is less than the yield strength of the straight plates 24; the metal The metal damping part 2 is sandwiched and fixed between at least two of the friction damping parts 1, and the plate of the friction damping part 1 on the side away from the metal damping part 2 is suitable for connecting with the main structure; in detail, the friction damping part 1 installed above the metal damping part 2 is defined as a friction damper A, the lower plate 12 of the friction damper A is fixed to the connecting plate 21 of the metal damping part 2, and the upper plate 11 is fixed to the main structure; the friction damping part 1 installed below the metal damping part 2 is defined as a friction damper B, and the friction damper B The upper plate 11 is fixed to the connecting plate 21 of the metal damping part 2, and the lower plate 12 is fixed to the main structure; wherein the friction damping part 1 is suitable for friction energy consumption under small vibration intensity, and the friction force increases with the increase of vibration intensity; the metal damping part 2 is suitable for energy consumption under medium vibration intensity and large vibration intensity, and the first plate group, the second plate group, and the third plate group yield and consume energy in sequence according to the order of yield strength; the maximum friction force of the friction damping part 1 is connected and corresponds to the minimum yield force of the metal damping part 2.
[0032] Furthermore, at least two arc-shaped recesses of the first arc plates 22 are arranged back to back in both directions; at least two arc-shaped recesses of the second arc plates 23 are arranged back to back in both directions, which are suitable for making the metal damping part 2 dissipate energy in both directions; the upper plate 11 is provided with a plurality of upper friction holes 111, and the upper friction holes 111 are extended along the first direction; the lower plate 12 is provided with a plurality of lower friction holes 121, and the lower friction holes 121 are extended along the second direction; the friction plate 13 is provided with a connecting hole 132, and the connecting hole 132 corresponds to the upper friction hole 111 and the lower friction hole 121; wherein the fastener 3 is passed through the upper friction hole 111, the connecting hole 132 and the lower friction hole 121 in sequence and then fixed, so that the friction plate 13 is clamped between the upper plate 11 and the lower plate 12; the friction coating 131 is coated on the friction plate 13 at a position close to the connecting hole 132.
[0033] Furthermore, the first arc plate 22, the second arc plate 23, and the straight plate 24 are all steel plates, and the steel plates located on the same side of the center line 4 are of the same material, and the steel plates located on both sides of the center line 4 are of different materials; specifically, the steel plates located on one side of the center line 4 are defined as Class A steel plates, and the steel plates located on the other side of the center line 4 are defined as Class B steel plates, wherein the material of the Class A steel plates may be Q235 steel, and the material of the Class B steel plates may be LY215 steel; wherein the yield strengths of Q235 steel and LY215 steel are different, thereby obtaining a damper with multiple yield strengths.
[0034] The specific use process of the multi-stage variable friction mild steel damper is as follows: under a small vibration intensity, a small displacement friction is generated at the friction damper A and the friction damper B, and the vibration energy is consumed by friction; wherein, a relative displacement occurs between the upper plate 11 and the friction plate 13 or the friction plate 13 and the lower plate 12. As the vibration intensity increases, the relative displacement between the upper plate 11 and the friction plate 13 or the friction plate 13 and the lower plate 12 increases. Since the friction plate 13 is fastened and the plate surface of the friction plate 13 is coated with a high friction coating 131, once the displacement increases and enters the high friction coating 131 part, the friction coefficient increases, and then The friction force between the upper plate 11 and the friction plate 13 or the friction plate 13 and the lower plate 12 is gradually increased, and the friction energy dissipation effect is gradually increased. In summary, the friction damping part 1 can consume vibration energy through friction under low vibration intensity, and at the same time can gradually increase the energy dissipation effect with the increase of vibration intensity, thereby providing a variable friction damper with strong adaptability; further, the upper friction hole 111 at the upper plate 11 is extended along the first direction, and the lower friction hole 121 at the lower plate 12 is extended along the second direction, so that the friction damping part 1 obtains bidirectional displacement friction energy dissipation capacity, which is suitable for a variety of different earthquake vibration conditions and has strong practicality.
[0035] The specific use process of the multi-stage variable friction soft steel damper also includes that under medium vibration intensity and high vibration intensity, the steel plate at the metal damping part 2 begins to bend and shear deform, and consumes vibration energy with the help of metal deformation. It should be noted that by setting the friction damping and yield strength, the maximum friction force of the friction damping part 1 is connected and corresponds to the minimum yield force of the metal damping part 2; wherein, according to the yield strength gradient, the first arc plate 22 with a smaller yield strength first yields and deforms to consume energy, and the second arc plate 23 and the straight plate 24 do not participate in energy consumption, and the damper is in the first stage of energy consumption; as the vibration intensity gradually increases, after reaching the yield limit of the second arc plate 23, the second arc plate 23 and the first arc plate 22 yield and consume energy together, and the damper enters the second stage of energy consumption, which can dissipate more vibration energy compared to the first stage; as the vibration intensity further increases, the straight plate 24 yields and participates in energy consumption, and the damper enters the third stage. In the energy dissipation process of the first section, the first plate group, the second plate group and the third plate group all participate in the energy dissipation, and the damper achieves the best energy dissipation effect; when the metal damping part 2 dissipates energy in buckling, it dissipates energy step by step according to the magnitude of the vibration intensity, and the energy dissipation mechanism is more adapted to the actual vibration situation. The gradual multi-stage energy dissipation process is reasonable and efficient, and it can also automatically enter the corresponding energy dissipation stage according to the vibration situation, which is conducive to achieving the ideal energy dissipation effect; further, at least two first arc plates 22 are arranged back to back in both directions, and at least two second arc plates 23 are arranged back to back in both directions, and at least two straight plates 24 are respectively arranged on both sides of the center line 4, so that the first plate group, the second plate group and the third plate group can perform bidirectional deformation energy dissipation, which is suitable for a variety of different earthquake vibration conditions and has strong practicality; further, the materials of the Class A steel plate and the Class B steel plate in the metal damping part 2 are different, which leads to different yield strengths, so that the damper obtains multiple buckling points or shear points, thereby improving the overall performance.
[0036] In this embodiment, by providing a matching friction damping part 1 and a metal damping part 2, the purpose of the damper absorbing energy by friction under small earthquakes and having multiple energy absorbing stages is achieved, thereby solving the defects of the prior art that the energy absorbing mechanism is single and the substrate is not damaged by energy absorbing during small vibrations. When the friction damping part 1 is in use, as the vibration intensity gradually increases, the displacement between the upper plate 11 and the friction plate 13 or the friction plate 13 and the lower plate 12 increases accordingly, so that the friction energy absorbing effect also increases continuously, thereby obtaining a variable friction damper whose energy absorbing effect gradually increases as the vibration progresses, and the device is highly practical. At the same time, the friction damping part 1 obtains a two-way displacement friction energy absorbing capacity, which is suitable for a variety of different earthquake vibration conditions and has strong compatibility.
[0037] In this embodiment, by setting a steel plate group with different bending degrees and different materials, energy-absorbing steel plates with a variety of different yield strengths are obtained, so that the damper has a variety of different buckling points or shear points, as well as multiple energy-absorbing stages; when absorbing energy by buckling, the damper consumes energy step by step according to the magnitude of the vibration intensity, and the energy-absorbing mechanism is more adapted to the actual vibration situation. The gradual multi-stage energy-absorbing process is reasonable and efficient, and it can also automatically enter the corresponding energy-absorbing stage, and has strong performance; by setting the yield degree of the steel plate group and the friction coefficient of the friction damping part 1, the friction energy consumption of the friction damper can be adjusted to increase, so that the maximum friction force of the friction damping part 1 is connected with the shear and buckling energy consumption starting points of the steel plate damper, thereby ensuring the continuity of the overall energy-absorbing process, and at the same time maximizing the energy consumption of the damper to ensure the safety of the structural theme; by setting a bidirectional steel plate group, the metal damping part 2 can consume energy in both directions, and by setting a bidirectional friction hole at the friction damping part 1, the friction damping part 1 can realize bidirectional energy consumption, which has strong adaptability and is easy to promote and use.
[0038] In some embodiments, in combination Figure 1 As shown, at least two of the first arc plates 22 are respectively arranged on both sides of the center line 4; the center line 4 is arranged in the middle of the metal damping part 2, and at least two of the second arc plates 23 are respectively arranged on both sides of the center line 4; at least two of the straight plates 24 are respectively arranged on both sides of the center line 4; wherein, the notches of the first arc plate 22 and the second arc plate 23 located on the same side of the center line 4 are oriented in the same direction, and the fixed positions of the ends are arranged close to each other.
[0039] In some embodiments, in combination Figure 2 and Figure 4 As shown, the upper plate 11 and the lower plate 12 are both provided with reserved holes 5, which are suitable for being fixed to the main structure or the connecting plate 21 with the help of the reserved holes 5; wherein, the upper plate 11 of the friction damper A is fixed to the main structure with the help of the reserved holes 5, and the lower plate 12 is fixed to the connecting plate 21 with the help of the reserved holes 5, and can also be fixed by welding; the lower plate 12 of the friction damper B is fixed to the main structure with the help of the reserved holes 5, and the upper plate 11 is fixed to the connecting plate 21 with the help of the reserved holes 5, and can also be fixed by welding.
[0040] In some embodiments, in combination Figure 1 As shown, a side plate 6 is provided between at least two of the connecting plates 21, and at least two side plates 6 are respectively provided on both sides of the center line 4; the side plates 6 may be steel plates, specifically LY215 steel.
[0041] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present utility model are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope defined by the present utility model.
Claims
1. A multi-stage variable friction mild steel damper, characterized in that: include: The friction damping part (1) comprises an upper plate (11), a lower plate (12), and a friction plate (13) clamped between the upper plate (11) and the lower plate (12); a friction coating (131) is provided on the plate surface of the friction plate (13); The metal damping part (2) comprises at least two connecting plates (21), and a first plate group, a second plate group and a third plate group arranged between the at least two connecting plates (21); The first plate group includes at least two first curved plates (22), the second plate group includes at least two second curved plates (23), the curvature of the first curved plates (22) is greater than the curvature of the second curved plates (23), and the third plate group includes at least two straight plates (24); The metal damping part (2) is sandwiched and fixed between at least two of the friction damping parts (1), and the plate body of the friction damping part (1) on a side facing away from the metal damping part (2) is suitable for connecting to the main structure; Wherein, the friction damping part (1) is suitable for friction energy consumption under low vibration intensity, and the friction force increases with the increase of vibration intensity; The metal damping part (2) is suitable for consuming energy under medium vibration intensity and high vibration intensity, and the first plate group, the second plate group and the third plate group yield in sequence.
2. The multi-stage variable friction mild steel damper according to claim 1, characterized in that: The arc-shaped recesses of at least two of the first arc plates (22) are arranged back-to-back in both directions; The arc-shaped recesses of at least two of the second arc plates (23) are arranged in a bidirectionally back-to-back manner, which is suitable for enabling the metal damping part (2) to dissipate energy in a bidirectional manner.
3. The multi-stage variable friction mild steel damper according to claim 1, characterized in that: The upper plate (11) is provided with a plurality of upper friction holes (111), and the upper friction holes (111) are extended along a first direction; The lower plate (12) is provided with a plurality of lower friction holes (121), and the lower friction holes (121) are extended along the second direction; The friction plate (13) is provided with a connecting hole (132), and the connecting hole (132) corresponds to the upper friction hole (111) and the lower friction hole (121); The fastener (3) is passed through the upper friction hole (111), the connecting hole (132) and the lower friction hole (121) in sequence and then fixed, so that the friction plate (13) is clamped between the upper plate (11) and the lower plate (12).
4. The multi-stage variable friction mild steel damper according to claim 3, characterized in that: The friction coating (131) is coated on the friction plate (13) at a position close to the connecting hole (132).
5. The multi-stage variable friction mild steel damper according to claim 4, characterized in that: At least two of the first arc plates (22) are respectively arranged on both sides of the center line (4); At least two of the second arc plates (23) are respectively arranged on both sides of the center line (4); At least two straight plates (24) are respectively arranged on both sides of the center line (4); The notches of the first arc plate (22) and the second arc plate (23) located on the same side of the center line (4) are oriented in the same direction.
6. The multi-stage variable friction mild steel damper according to claim 5, characterized in that: The first arc plate (22), the second arc plate (23), and the straight plate (24) are all steel plates, and the steel plates on the same side of the center line (4) are made of the same material, while the steel plates on both sides of the center line (4) are made of different materials.
7. The multi-stage variable friction mild steel damper according to claim 1, characterized in that: The maximum friction force of the friction damping part (1) corresponds to the minimum yield force of the metal damping part (2).
8. The multi-stage variable friction mild steel damper according to claim 1, characterized in that: The upper plate (11) and the lower plate (12) are both provided with reserved holes (5), which are suitable for being fixed to the main structure or the connecting plate (21) by means of the reserved holes (5).
9. The multi-stage variable friction mild steel damper according to claim 5, characterized in that: A side plate (6) is provided between at least two of the connecting plates (21), and at least two side plates (6) are respectively provided on both sides of the center line (4).