A graded yield post-hardening metal sleeve damper

Abstract

The application is a kind of graded yield post-hardening metal sleeve damper, which comprises an inner tube, an outer tube, inner and outer friction plates, energy dissipation metal plates and limiting plates. The inner tube extends into the outer tube, the opposite side of the outer tube is slotted, the inner friction plate, the outer friction plate, the energy dissipation metal plate and the limiting plate are sequentially placed in the slot, and are connected through high-strength bolts. The upper and lower sides of the side slot of the outer tube are provided with gap slots, and the energy dissipation metal strips on the energy dissipation metal plate extend into the gap slots. In the case of small earthquakes, energy dissipation is realized by the yield of part of the energy dissipation metal strips, and in the case of large earthquakes, energy dissipation is realized by the sliding friction of the friction plates and the yield of the remaining energy dissipation metal strips, achieving the effects of graded yield and post-yield hardening. The application has stable and good energy dissipation capacity, can grade yield under different earthquake magnitudes, can realize the post-yield hardening effect, prevent the sudden reduction of the structure's stiffness after yield to form an unfavorable failure mechanism, and realizes the separation of the energy dissipation module and the outer sleeve, which is convenient to install and replace.

Description

Technical Field

[0001] This invention relates to the field of structural energy dissipation and vibration reduction technology, specifically to a metal sleeve damper with graded yield hardening function. Background Technology

[0002] Metal yielding dampers have advantages such as clear force mechanism and stable performance, and are widely used in structural seismic design. Metal sleeve dampers are an important type. Currently, metal sleeve dampers have the following problems: they are usually designed only for large earthquakes, and are difficult to yield and dissipate energy under small earthquakes; the sleeve body and energy dissipation module are integrated, requiring replacement of the entire sleeve after energy dissipation, which is costly and inconvenient to install; the damper stiffness decreases sharply after yielding, which can cause a sudden change in structural stiffness and is detrimental to the overall seismic performance of the structure. This invention incorporates energy-dissipating metal strips and plates, with the energy-dissipating metal plate and outer tube designed separately for easy replacement after an earthquake. Furthermore, by incorporating friction plates and gaps of different sizes, the damper can achieve graded yielding and post-yield hardening, enabling it to function effectively under both small and large earthquakes, protecting the structure during earthquakes. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a graded yield hardened metal sleeve damper.

[0004] To achieve the above objectives, the technical solution adopted by this invention is as follows:

[0005] A graded yield hardening metal sleeve damper includes an outer tube and an inner tube. The inner tube extends into the outer tube. The outer tube has grooves on opposite sides. An inner friction plate, an outer friction plate, an energy-dissipating metal plate, and a limiting plate are placed sequentially in the left and right grooves and connected by two high-strength bolts. The upper and lower sides of the outer tube side grooves have a first gap groove and a second gap groove, and an energy-dissipating metal strip on the energy-dissipating metal plate extends into them.

[0006] The outer tube has a square connector with a circular through hole on one side, which is connected to the main structure by bolts through the circular hole; the outer tube has slots on the left and right sides, and the upper and lower sides of the square slot are provided with staggered first gap slots and second gap slots, the width of the first gap slot is smaller than the width of the second gap slot, and the openings of the two gap slots are rounded.

[0007] The inner tube has a square connector with a circular through hole on one side, which is connected to the main structure by bolts through the circular hole; the inner tube body has bolt hole one and bolt hole two on both sides, bolt hole one is used to fix the limiting plate to the inner tube body, and bolt hole two is located in the middle of the tube body and is used to fix the inner friction plate; the length of the inner tube body is determined according to the required length of the connection between connector one and connector two.

[0008] The energy-consuming metal plate includes a metal connecting plate and energy-consuming metal strips arranged at intervals along the length of the metal connecting plate. The energy-consuming metal strips can extend into the first gap groove and the second gap groove. The metal connecting plate also has a rectangular through-hole bolt hole.

[0009] The limiting plate has a limiting block on each side along its length; the limiting plate has two bolt holes four on each limiting block, which are aligned with bolt hole one and fixedly connected to the inner tube body by high-strength bolt one; the limiting plate has bolt holes five on each of its left and right sides for placing high-strength bolt two.

[0010] The inner friction plate has bolt holes three on both sides, which are aligned with bolt holes two; the inner friction plate is fixedly connected to the inner tube wall.

[0011] The outer friction plate has two rectangular through bolt holes on both sides; the outer friction plate is fixedly connected to the energy-consuming metal plate.

[0012] The inner tube body, inner friction plate, outer friction plate, energy-consuming metal plate, and limiting plate are connected by two high-strength bolts.

[0013] In this invention, the energy-dissipating metal plate is fixedly connected to the outer friction plate, and the inner tube body is fixedly connected to the inner friction plate. Under the action of bolts, pressure exists between the inner and outer friction plates. During minor vibrations, the inner and outer tubes undergo relative displacement along their longitudinal direction. Due to the different sizes of the first and second gap grooves, the energy-dissipating metal strip in the first gap groove will first contact the gap groove, and the metal strip will yield under pressure to dissipate energy. The resultant force of the gap groove on the energy-dissipating metal plate is less than the maximum static friction force that can be generated on the inner and outer friction plates, so the inner and outer friction plates remain relatively stationary. During major vibrations, the force on the energy-dissipating metal strip in the second gap groove continues to increase, and the resultant force on the energy-dissipating metal plate exceeds the maximum static friction force on the inner and outer friction plates. The inner and outer friction plates generate sliding friction to dissipate energy until the energy-dissipating metal plate reaches the limit block position, at which point the sliding stops, and the force on the energy-dissipating metal strip in the second gap groove continues to increase until it yields. This achieves the effect of staged yielding and hardening after yielding in the damper. Compared with the prior art, the advantages of the present invention are as follows: the damper has the ability to yield in stages, and can yield and dissipate energy under both large and small earthquakes; the energy dissipation module is separated from the outer sleeve, and when the damper is replaced after yielding, only the energy dissipation module needs to be replaced without disassembling the entire sleeve, which is convenient for installation and saves materials; the damper can achieve stiffness hardening after yielding, avoiding the adverse effects on the seismic resistance of the structure caused by the stiffness degradation after yielding of conventional dampers. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is an exploded view of the present invention;

[0016] Figure 3 This is a schematic diagram of the outer tube structure;

[0017] Figure 4 This is a schematic diagram of the inner tube structure;

[0018] Figure 5 This is a schematic diagram of the structure of the energy-consuming metal plate;

[0019] Figure 6 This is a schematic diagram of the limiting plate.

[0020] Figure 7 This is a schematic diagram of the external friction plate.

[0021] Figure 8 This is a schematic diagram of the internal friction plate.

[0022] Figure 9 This is the force-displacement curve of a graded yield hardened metal sleeve damper.

[0023] In the diagram: 1. Outer tube; 11. First gap groove; 12. Second gap groove; 13. Connector 1; 2. Inner tube; 21. Connector 2; 22. Inner tube body; 23. Bolt hole 1; 24. Bolt hole 2; 3. Energy-consuming metal plate; 31. Energy-consuming metal strip; 32. Bolt horizontal hole 1; 33. Metal connecting plate; 4. Limiting plate; 41. Limiting block; 42. Bolt hole 4; 43. Bolt hole 5; 5. Outer friction plate; 51. Bolt horizontal hole 2; 6. Inner friction plate; 61. Bolt hole 3; 7. High-strength bolt 1; 8. High-strength bolt 2. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Please see Figure 1-9 The present invention provides a technical solution: a graded yield hardening metal sleeve damper, comprising an outer tube and an inner tube, the inner tube extending into the outer tube, and grooves on opposite sides of the outer tube, wherein an inner friction plate, an outer friction plate, an energy-dissipating metal plate and a limiting plate are placed sequentially in the left and right grooves and connected by two high-strength bolts; a first gap groove and a second gap groove are opened on the upper and lower sides of the outer tube side groove, and an energy-dissipating metal strip on the energy-dissipating metal plate extends into them.

[0026] After the inner tube 2 extends into the outer tube 1, the inner tube body 22 is left with a distance twice the displacement generated by the yielding of the energy-dissipating metal strip 31 from the bottom of the outer tube 1 sleeve. This ensures that when the sleeve is subjected to longitudinal external force disturbance, there is sufficient space between the inner tube 2 and the outer tube 1 to generate relative displacement. The length of the inner tube body 22 is determined according to the length required when the connector 13 and connector 21 are connected to the main structure. The inner friction plate 6 is placed in the slot of the outer tube 1. The bolt hole 3 61 of the inner friction plate 6 is aligned with the bolt hole 24 in the inner tube 2. The inner friction plate 6 is fixedly connected to the inner tube body 22. The outer friction plate 5 and the energy-dissipating metal plate 3 are fixedly connected to form a whole and the outer friction plate 6 is aligned with the inner friction plate 6. The energy-dissipating metal strip 31 of the metal plate 3 extends into the first gap groove 11 and the second gap groove 12 of the outer tube 1. The first gap groove 11 and the second gap groove 12 are rounded to reduce stress concentration. The limiting plate 4 is placed on the energy-dissipating metal plate. On the outer side, bolt hole 42 is aligned with bolt hole 23, and bolt hole 43 is aligned with the middle position of bolt transverse hole 32. The thickness of the limiting block 41 is set so that when it contacts the surface of the inner tube 2, the middle part of the limiting plate 4 is just in contact with the surface of the energy-consuming metal plate 3. The distance between the longitudinal end of the metal connecting plate 33 of the energy-consuming metal plate 3 and the limiting block 41 is less than the length of bolt transverse hole 32, to prevent the situation where the high-strength bolt 8 has reached the end of bolt transverse hole 32, but the energy-consuming metal plate 3 has not yet contacted the limiting block 41. When the energy-consuming metal plate 3 and the outer friction plate 5 form a whole and generate relative displacement with the inner friction plate 6 along the longitudinal direction of the sleeve, the size of the displacement can be limited by the limiting block 4 to prevent shearing action on the high-strength bolt 8. The limiting plate 4 and the inner tube 2 are connected by high-strength bolt 7. The inner friction plate 6 and the outer friction plate 5 are pressured by high-strength bolt 8. When the two generate relative displacement, sliding friction will be generated.

[0027] Under the condition of a major earthquake, relative displacement occurs between the inner pipe 2 and the outer pipe 1 along the longitudinal direction of the pipes. The force between them is transmitted through the energy-dissipating metal strips 31. Each energy-dissipating metal strip 31 has the same size. The width of the first gap groove 11 is smaller than that of the second gap groove 12. Therefore, the energy-dissipating metal strip 31 located in the first gap groove 11 will deform first under the force. Figure 9 As the force-displacement curve enters stage I, since the energy-consuming metal plate 3 is fixedly connected to the outer friction plate 5, the force exerted on the energy-consuming metal strip 31 by the gap groove of the outer tube 1 will balance the frictional force between the outer friction plate 6 and the inner friction plate 5. At this time, only a portion of the energy-consuming metal strip 31 is under force, and the resulting force is relatively small. The frictional force between the two friction plates is static friction, not sliding friction, and the inner friction plate 6 and the outer friction plate 5 remain relatively stationary. As the relative displacement between the inner tube 2 and the outer tube 1 continues to increase, the energy-consuming metal strip 31 begins to contact the second gap groove 12 and deform under force. Figure 9The force-displacement curve enters stage II. The frictional force between the inner friction plate 6 and the outer friction plate 5 increases but still does not reach the sliding friction force, and the two remain relatively stationary. The relative displacement between the inner tube 2 and the outer tube 1 continues to increase, and the energy-consuming metal rod 31 in the first gap groove 11 reaches the yield point. Figure 9 As the force-displacement curve enters stage III, the frictional force between the inner friction plate 6 and the outer friction plate 5 increases but still does not reach the level of sliding friction, and the two remain relatively stationary. The relative displacement between the inner tube 2 and the outer tube 1 continues to increase, the energy-consuming metal strip 31 deforms under stress, and the frictional force between the inner friction plate 6 and the outer friction plate 5 increases to the magnitude of sliding friction, resulting in relative slippage between the inner friction plate 6 and the outer friction plate 5. Figure 9 The force-displacement curve enters stage IV until the movement of the metal connecting plate 33 is restricted by the limiting block 41. Figure 9 The curve enters stage V; the relative displacement between the inner tube 2 and the outer tube 1 continues to increase, and the energy-consuming metal rod 31 continues to deform under stress until the energy-consuming metal rod 31 in the second gap groove 22 also reaches the deformation yield, and the force-displacement curve continues to rise. Figure 9 The curve enters stage VI; thereafter, the relative displacement between inner tube 2 and outer tube 1 gradually decreases to zero and then increases in the opposite direction, repeating the above process continuously. The force-displacement relationship of the damper forms a hysteresis curve and consumes energy during the cycle.

[0028] The effects of minor earthquakes are similar to those of major earthquakes; they are influenced by the intensity of the minor earthquake. Figure 9 The curve can fold back at different stages and circulate energy consumption.

[0029] In summary, the different widths of the first gap groove 11 and the second gap groove 12 in this technical solution result in different stages of stress distribution on the energy dissipation device. This ensures that during an earthquake, if there is a small displacement deformation, the energy-dissipating metal strip 31 in the first gap groove 11 will yield and dissipate energy preferentially; if there is a large displacement deformation, the energy-dissipating metal strip 31 in the second gap groove 12 will only yield after the inner friction plate 6 and the outer friction plate 5 have completed sliding friction, achieving the effect of graded yielding and hardening. The graded yielding and hardening metal sleeve damper of this solution is designed for staged energy dissipation, ensuring that the damper can work effectively under large, moderate, and small earthquakes. The graded yielding and hardening metal sleeve damper has a simple structure; after operation, only the energy-dissipating metal plate needs to be replaced, rather than the entire sleeve, ensuring the convenience and economy of damper installation and maintenance. The post-yielding hardening characteristic can prevent the sudden decrease in stiffness after structural yielding from forming an unfavorable failure mechanism, ensuring the safety of the main building.

[0030] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A graded yield-hardening metal sleeve damper, characterized in that, It includes an outer tube (1) and an inner tube (2). The inner tube body (22) extends into the outer tube (1). The outer tube (1) has grooves on opposite sides. The inner friction plate (6), outer friction plate (5), energy-consuming metal plate (3) and limiting plate (4) are placed in the two grooves in sequence and connected by high-strength bolts (8). The upper and lower sides of the outer tube side groove have a first gap groove (11) and a second gap groove (12). The energy-consuming metal strip (31) on the energy-consuming metal plate extends into it. The inner tube (2) has bolt holes 1 (23) and bolt holes 2 (24) on both sides of the inner tube body (22); the length of the inner tube body (22) is determined according to the required length of the connection between connector 1 (13) and connector 2 (21); The energy-consuming metal plate (3) includes a metal connecting plate (33) and energy-consuming metal strips (31) arranged at intervals along the length of the metal connecting plate (33). The energy-consuming metal strips (31) can extend into the first gap groove (11) and the second gap groove (12). The metal connecting plate (33) also has a bolt horizontal hole (32). The limiting plate (4) has a limiting block (41) on each side along its length; the limiting plate (4) has two bolt holes (42) on each limiting block (41); the limiting plate (4) has bolt holes (43) on each of its left and right sides. The outer tube (1) has square slots on the left and right sides. The upper and lower sides of the square slots are provided with staggered first gap slots (11) and second gap slots (12). The width of the first gap slot (11) is greater than the width of the second gap slot (12). The openings of the two gap slots are rounded. The inner friction plate (6) is fixedly connected to the inner tube body (22); the outer friction plate (5) is fixedly connected to the energy-consuming metal plate (3); the limiting plate 4 and the inner tube 2 are connected by high-strength bolts 7.

2. The graded yield hardening metal sleeve damper as described in claim 1, characterized in that, The internal friction plate (6) has bolt holes (61) on both sides.

3. A graded yield-hardening metal sleeve damper as described in claim 1 or 2, characterized in that, The external friction plate (5) has two bolt holes (51) on each side.

4. A graded yield-hardening metal sleeve damper as described in claim 1 or 2, characterized in that, The inner tube body (22), inner friction plate (6), outer friction plate (5), energy-consuming metal plate (3) and limiting plate (4) are connected by high-strength bolts (8).

5. A graded yield-hardening metal sleeve damper as described in claim 3, characterized in that, The inner tube body (22), inner friction plate (6), outer friction plate (5), energy-consuming metal plate (3) and limiting plate (4) are connected by high-strength bolts (8).

6. A graded yield-hardening metal sleeve damper as described in claim 1, 2, or 5, characterized in that, A connector 1 (13) is provided on one longitudinal side of the outer tube (1); a connector 2 (21) is provided on one side of the inner tube (2).

7. A graded yield hardening metal sleeve damper as described in claim 3, characterized in that, A connector 1 (13) is provided on one longitudinal side of the outer tube (1); a connector 2 (21) is provided on one side of the inner tube (2).

8. A graded yield hardening metal sleeve damper as described in claim 4, characterized in that, A connector 1 (13) is provided on one longitudinal side of the outer tube (1); a connector 2 (21) is provided on one side of the inner tube (2).

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