Metal friction self-resetting damper with displacement scaling function

Abstract

This invention proposes a metal friction self-resetting damper with displacement scaling function, belonging to the field of structural energy dissipation and vibration reduction control technology. It solves the problem that traditional self-resetting dampers are prone to brittle fracture of prestressed steel strands when large displacements occur during earthquakes, preventing them from achieving self-resetting. The damper includes: a support component, a wedge block assembly, mild steel, an outer plate, and a load control module. The wedge block assembly includes two horizontal wedges and two vertical wedges. The two horizontal wedges are connected to the left and right ends of the support component, respectively, while the two vertical wedges are located at the upper and lower ends of the support component, with their contact surfaces abutting against each other. The mild steel is fixed to the outside of the vertical wedges. The outer plate is sleeved on the outside of the wedge block assembly and slidably connected to the mild steel. The load control module passes through the outer plate and connects to any one of the horizontal wedges, with a helical spring installed between the horizontal wedge and the load control module. This invention can be applied to bridges, buildings, and other architectural structures.

Description

Technical Field

[0001] This invention belongs to the field of structural energy dissipation and vibration reduction control technology, and particularly relates to a metal friction self-resetting damper with displacement scaling function. Background Technology

[0002] Earthquakes are highly destructive and unpredictable natural disasters. The core idea of ​​traditional seismic design is to achieve structural ductility, that is, to achieve a ductile failure mode for structural members by controlling a series of structural measures such as reinforcement ratio, aspect ratio, and material strength, ultimately achieving the seismic design goal of preventing structural collapse under large earthquakes. However, ductile design comes at the cost of plastic damage to structural members. Therefore, finding new methods in the field of seismic resistance is particularly important. To reduce the damage of vibration to building structures, the concepts of vibration control and recoverable functional structures in civil engineering have gradually been proposed.

[0003] Structural vibration control refers to installing energy-dissipating and vibration-damping devices at certain critical parts of a structure to suppress its response under external loads such as earthquakes and wind. This additional energy-dissipating device reduces vibration and isolates the structure to protect its safety. Recoverable structures, on the other hand, utilize mechanisms such as self-resetting, replaceability, swaying, and energy dissipation to allow the structure to continue to be used after a strong earthquake with little or no repair. This aims to achieve post-earthquake recoverability for engineering structures, urban systems, and even the entire society, while ensuring life safety. Combining the advantages of self-resetting and energy dissipation mechanisms can effectively improve the recoverability of structures after an earthquake. By designing dampers that combine energy dissipation and self-resetting functions, residual deformation of the structure can be further controlled after dissipating seismic input energy, thus enhancing the recoverability of the structure's post-earthquake function.

[0004] Currently, most self-resetting dampers consist of energy-dissipating components and a self-resetting system connected in parallel. The reset system of a traditional self-resetting damper comprises disc springs, prestressed steel strands, helical springs, and shape memory alloys. Due to the large self-weight of buildings, a significant restoring force is required after deformation; therefore, steel strands are chosen as the self-resetting system for the damper. The tensile strength of steel strands can reach approximately 2000 MPa, but their ductility is poor. Earthquakes cause significant displacement in buildings, which can lead to brittle fracture of the prestressed steel strands. Therefore, it is necessary to develop a device that can better absorb and dissipate energy during earthquakes and convert displacement magnitude. This device should both dissipate the energy generated by earthquakes and control the displacement transmitted from the building to the damper, thus achieving both energy dissipation and self-resetting functions. Summary of the Invention

[0005] This invention addresses the technical problem that traditional self-resetting dampers, when subjected to large displacements during earthquakes, suffer from poor ductility of the prestressed steel strands, making them prone to brittle fracture and unable to achieve self-resetting. It proposes a metal friction self-resetting damper with displacement scaling function.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A metal friction self-resetting damper with displacement scaling function, comprising:

[0008] Support components;

[0009] A wedge assembly includes two horizontal wedges and two vertical wedges. The two horizontal wedges are connected to the left and right ends of the support component via prestressed steel strands, respectively. The two vertical wedges are respectively located at the upper and lower ends of the support component. The support component is positioned in the gap formed by the contact surfaces of the vertical and horizontal wedges through mutual abutment.

[0010] Mild steel, which is fixed to the outside of the vertical wedge;

[0011] The outer plate is sleeved on the outside of the wedge block assembly and is slidably connected to the soft steel.

[0012] The load control module passes through the outer plate and is connected to any horizontal wedge, and a helical spring is provided between the horizontal wedge and the load control module.

[0013] In one embodiment, the metal friction self-resetting damper has a prestressed state in which the left and right ends of the support member are tightly attached to the horizontal wedges and bear the prestress of the prestressed steel strands when no earthquake occurs, and a self-resetting state in which the energy accumulated by the prestressed steel strands and the helical springs causes the horizontal and vertical wedges to gradually reset when an earthquake occurs and the seismic force decreases or stops.

[0014] In one embodiment, the supporting component is a cylindrical structure with multiple first through holes, the first through holes penetrating the two end faces of the cylindrical structure. The horizontal wedge has multiple second through holes, the second through holes penetrating the two planes of the horizontal wedge. The first through holes and the second through holes are arranged correspondingly. The prestressed steel strand passes through the cylindrical structure through the first through holes, and its two ends extend to the outside of the cylindrical structure and are anchored to the two horizontal wedges through the second through holes.

[0015] In one embodiment, the two horizontal wedges include a first horizontal wedge that is larger on the left and smaller on the right, and a second horizontal wedge that is smaller on the left and larger on the right. The first and second horizontal wedges are symmetrical from left to right. The small ends of the first and second horizontal wedges are arranged opposite to each other. The first and second horizontal wedges are respectively connected to the two end faces of the cylindrical structure.

[0016] The vertical wedge includes a first vertical wedge that is larger at the top and smaller at the bottom, and a second vertical wedge that is smaller at the top and larger at the bottom. The first and second vertical wedges are symmetrical. The small ends of the first and second vertical wedges are arranged opposite to each other. The first and second vertical wedges are respectively located at the upper and lower ends of the cylindrical structure.

[0017] The two inclined surfaces of the first vertical wedge are in sliding friction contact with the upper inclined surface of the first horizontal wedge and the upper inclined surface of the second horizontal wedge, respectively; the two inclined surfaces of the second vertical wedge are in sliding friction contact with the lower inclined surface of the first horizontal wedge and the lower inclined surface of the second horizontal wedge, respectively.

[0018] In one embodiment, the sum of the inclination angles of the inclined surfaces of the horizontal wedge and the vertical wedge that are in mutual sliding friction contact is equal to 90°.

[0019] In one embodiment, the inclination angle of the two inclined surfaces of the first horizontal wedge and the second horizontal wedge is 45°, the inclination angle of the two inclined surfaces of the first vertical wedge and the second vertical wedge is 45°, and the ratio of the vertical displacement conversion rate of the vertical wedge to the conversion rate of the horizontal wedge is 1:1.

[0020] In one embodiment, the outer panel includes:

[0021] Base plate;

[0022] The two slide rails are arc-shaped tracks. The two slide rails are fixedly connected to the upper and lower ends of the base plate, respectively. The slide rails are slidably connected to the soft steel set on the outside of the vertical wedge block.

[0023] A side plate is disposed on the left side of the base plate, and the load control module is connected to the first horizontal wedge through a through hole in the side plate.

[0024] In one embodiment, the load control module is a cylindrical structure, and the helical spring is sleeved on the cylindrical structure.

[0025] In one embodiment, the load control module is connected to the building structure via a connection device.

[0026] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0027] 1. This invention proposes a metal friction self-resetting damper with displacement scaling function. This damper has the function of displacement scaling, which can amplify or reduce the displacement transmitted to the damper by the building. It has stable and good energy dissipation capacity and good self-resetting function. It can be widely used in building structures such as bridges and houses, and has the characteristics of stable energy dissipation, simple structure and convenient installation.

[0028] 2. This invention proposes a metal friction self-resetting damper with displacement scaling function. By designing the slide rail as an arc-shaped track, it can dissipate energy through friction with soft steel. The slide rail can convert the horizontal displacement of the building into vertical displacement and transmit it to the vertical wedge. The transmission efficiency of horizontal and vertical displacement can be adjusted by the curvature of the slide rail.

[0029] 3. This invention proposes a metal friction self-resetting damper with displacement scaling function. This damper comprises a support component, horizontal wedges, vertical wedges, an outer plate, and a load control module. During an earthquake, the two ends of the support component are tightly attached to the horizontal wedges, which can bear the prestress of the prestressed steel strands. During an earthquake, the load control module moves relative to the outer plate, causing relative displacement between the vertical wedges and the slide rail. The soft steel on the vertical wedges rubs against the slide rail, dissipating energy. Simultaneously, the slide rail compresses the vertical wedges, causing vertical displacement. The vertical slider compresses the horizontal wedges, dissipating energy through friction and causing them to separate, thus tensioning the prestressed steel strands. Once the earthquake effect decreases or stops, the energy accumulated in the prestressed steel strands and the helical springs causes the horizontal and vertical wedges to gradually reset, thereby achieving the self-resetting function of the damper and reducing or even eliminating residual deformation of the building. Attached Figure Description

[0030] Figure 1 A schematic diagram of the overall structure of the metal friction self-resetting damper provided by the present invention;

[0031] Figure 2 An exploded view of the metal friction self-resetting damper provided by the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the support component provided by the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the horizontal wedge block provided by the present invention;

[0034] Figure 5 This is a schematic diagram of the slide rail provided by the present invention.

[0035] The meanings of the reference numerals in the above figures are as follows:

[0036] 1. Supporting component; 2. Horizontal wedge; 3. Vertical wedge; 4. Prestressed steel strand; 5. Soft steel; 6. Base plate; 7. Slide rail; 8. Side plate; 9. Load control module; 10. Helical spring; 11. First through hole; 12. Second through hole; 13. Through hole;

[0037] 21. First horizontal wedge; 22. Second horizontal wedge;

[0038] 31. First vertical wedge; 32. Second vertical wedge. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments provided by this invention without inventive effort are within the scope of protection of this invention.

[0040] Obviously, the accompanying drawings described below are merely some examples or embodiments of the present invention. Those skilled in the art can apply the present invention to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this invention, modifications to design, manufacturing, or production based on the technical content disclosed in this invention are merely conventional technical means and should not be construed as insufficient disclosure of the present invention.

[0041] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention may be combined with other embodiments without conflict.

[0042] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," "an," "the," and similar words used in this invention do not indicate quantity limitation and may indicate singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this invention are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms "connected," "linked," and similar words used in this invention are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "A plurality" in this invention refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships may exist; for example, "A and / or B" can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects have an "or" relationship. The terms "first," "second," etc., used in this invention are merely to distinguish similar objects and do not represent a specific ordering of objects.

[0043] This invention provides a metal friction self-resetting damper with displacement scaling function, with attachment Figure 1-5 The figures shown are, respectively, a schematic diagram of the overall structure of the metal friction self-resetting damper according to the present invention, an exploded view of the metal friction self-resetting damper, a schematic diagram of the structure of the supporting component, a schematic diagram of the structure of the horizontal wedge block, and a schematic diagram of the structure of the slide rail. (Reference) Figure 1-2 As shown, the metal friction self-resetting damper includes at least: a support component 1, a wedge block assembly, a soft steel 5, an outer plate, and a load control module 9; wherein, the wedge block assembly includes two horizontal wedges 2 and two vertical wedges 3, the two horizontal wedges 2 are respectively connected to the left and right ends of the support component 1 through prestressed steel strands 4, and the two vertical wedges 3 are respectively located at the upper and lower ends of the support component 1. The support component 1 is positioned in the gap formed by the contact surfaces of the vertical wedges 3 and the horizontal wedges 2 through mutual abutment; the soft steel 5 is fixed to the outside of the vertical wedges 3, and the soft steel 5 is an energy-dissipating soft steel; the outer plate is sleeved on the outside of the wedge block assembly and is slidably connected to the soft steel 5; the load control module 9 passes through the outer plate and is connected to any one of the horizontal wedges 2, and a helical spring 10 is provided between the horizontal wedges 2 and the load control module 9.

[0044] For further details, please refer to the appendix. Figure 1-2The metal friction self-resetting damper has a prestressed state in which the left and right ends of the support component 1 are tightly attached to the horizontal wedge 2 and bear the prestressed steel strand 4 when no earthquake occurs, and a self-resetting state in which the energy accumulated by the prestressed steel strand 4 and the helical spring 10 causes the horizontal wedge 2 and the vertical wedge 3 to gradually reset when an earthquake occurs and the seismic action decreases or stops.

[0045] See appendix Figure 1 Appendix Figure 2 and attached Figure 4 The two horizontal wedges 2 include a first horizontal wedge 21 with a larger left side and a second horizontal wedge 22 with a smaller left side and a larger right side. The first horizontal wedge 21 and the second horizontal wedge 22 are symmetrical from left to right. The small ends of the first horizontal wedge 21 and the second horizontal wedge 22 are arranged opposite to each other. The first horizontal wedge 21 and the second horizontal wedge 22 are respectively connected to the two end faces of the cylindrical structure.

[0046] The vertical wedge 3 includes a first vertical wedge 31 that is larger at the top and smaller at the bottom, and a second vertical wedge 32 that is smaller at the top and larger at the bottom. The first vertical wedge 31 and the second vertical wedge 32 are symmetrical. The small ends of the first vertical wedge 31 and the second vertical wedge 32 are positioned opposite each other. The first vertical wedge 31 and the second vertical wedge 32 are respectively positioned at the upper and lower ends of the cylindrical structure. The small ends of the four wedges, namely the first horizontal wedge 21, the second horizontal wedge 22, the first vertical wedge 31 and the second vertical wedge 32, are positioned opposite each other to form a quadrilateral gap for installing the support component 1.

[0047] The two inclined surfaces of the first vertical wedge 31 are in sliding friction contact with the upper inclined surface of the first horizontal wedge 21 and the upper inclined surface of the second horizontal wedge 22, respectively; the two inclined surfaces of the second vertical wedge 32 are in sliding friction contact with the lower inclined surface of the first horizontal wedge 21 and the lower inclined surface of the second horizontal wedge 22, respectively.

[0048] Furthermore, the inclination angles of the horizontal wedge 2 and the vertical wedge 3 are adjustable, and the ratio of the vertical displacement conversion rate of the vertical wedge 3 to that of the horizontal wedge 2 is 1:1. To increase or decrease the displacement conversion rate, the sum of the inclination angles of the horizontal wedge 2 and the vertical wedge 3, which are in mutual sliding friction contact, must be equal to 90°.

[0049] In some embodiments, the inclination angles of the two inclined surfaces of the first horizontal wedge 21 and the second horizontal wedge 22 are, but not limited to, 45°, and the inclination angles of the two inclined surfaces of the first vertical wedge 31 and the second vertical wedge 32 are, but not limited to, 45°. Furthermore, while ensuring that self-locking does not occur between the wedges, the angle between the horizontal wedge 2 and the vertical wedge 3 can be changed to adjust the conversion rate between vertical and horizontal displacements to adapt to specific engineering examples.

[0050] See appendix Figure 1-3 The supporting component 1 is a cylindrical structure with multiple first through holes 11. The first through holes 11 penetrate the two end faces of the cylindrical structure. The horizontal wedge 2 has multiple second through holes 12. The second through holes 12 penetrate the two planes of the horizontal wedge 2 (i.e., the second through holes 12 penetrate the large end and the small end of the horizontal wedge 2). The first through holes 11 and the second through holes 12 are correspondingly arranged. The prestressed steel strand 4 passes through the cylindrical structure through the first through holes 11, and its two ends extend to the outside of the cylindrical structure and are anchored to the two horizontal wedges 2 through the second through holes 12.

[0051] See appendix Figure 2 The outer plate further includes: a base plate 6, two slide rails 7, and a side plate 8; wherein, the base plate 6 is a long strip-shaped structure; the two slide rails 7 are arc-shaped tracks, and the two slide rails 7 are fixedly connected to the upper and lower ends of the base plate 6 respectively, and the slide rails 7 are slidably connected to the soft steel 5 set on the outside of the vertical wedge 3; setting the slide rails 7 as arc-shaped tracks can dissipate energy through friction with the energy-dissipating soft steel 5. The slide rails 7 can convert the horizontal displacement of the building into vertical displacement and transmit it to the vertical wedge 3. In addition, the transmission efficiency of horizontal and vertical displacement can be adjusted by the curvature of the slide rails 7. The side plate 8 is set on the left side of the base plate 6, and the load control module 9 passes through the side plate 8 and is connected to the first horizontal wedge 21 through the through hole 13 opened on the side plate 8.

[0052] See appendix Figure 1-2 The load control module 9 is a cylindrical structure, and the helical spring 10 is sleeved on the cylindrical structure. In actual use, the load control module 9 of this metal friction self-resetting damper is connected to the building structure through a connecting device. The building structure includes, but is not limited to, bridges, houses, and other building structures.

[0053] The present invention also provides a working process of a metal friction self-resetting damper with displacement scaling function based on any of the above embodiments, specifically as follows:

[0054] When an earthquake occurs, the load control device 9 moves relative to the outer plate. The load control device 9 drives the vertical wedge 3 and the slide rail 7 to move relative to each other. The energy-dissipating soft steel 5 on the vertical wedge 3 rubs against the slide rail 7 to dissipate energy. The slide rail 7 compresses the vertical wedge 3, causing it to move vertically. The vertical slider 3 compresses the horizontal wedge 2, dissipating energy through friction and causing them to separate relative to each other, thus tensioning the prestressed steel strand 4. Once the earthquake effect decreases or stops, the energy accumulated in the prestressed steel strand 4 and the helical spring 10 will cause the horizontal wedge 2 and the vertical wedge 3 to gradually return to their original positions, thereby realizing the self-resetting function of the damper and reducing or even eliminating the residual deformation of the building.

[0055] The present invention also provides an installation process for a metal friction self-resetting damper with displacement scaling function based on any of the above embodiments, specifically as follows:

[0056] Taking a bridge structure as an example, the damper is placed horizontally, and the outer plate of the damper is connected to the pier. The load control device 9 is connected to the bridge deck through a connecting device. When an earthquake occurs, the bridge deck and the pier move horizontally, which in turn causes the horizontal wedge 2 and the vertical wedge 3 to rotate relative to each other, thereby realizing the functions of self-resetting and energy dissipation.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A metal friction self-resetting damper with displacement scaling function, characterized in that, include: Support components; A wedge assembly includes two horizontal wedges and two vertical wedges. The two horizontal wedges are connected to the left and right ends of the support component via prestressed steel strands, respectively. The two vertical wedges are located at the upper and lower ends of the support component. The two horizontal wedges include a first horizontal wedge that is larger on the left and smaller on the right, and a second horizontal wedge that is smaller on the left and larger on the right. The vertical wedges include a first vertical wedge that is larger at the top and smaller at the bottom, and a second vertical wedge that is smaller at the top and larger at the bottom. The two inclined surfaces of the first vertical wedge are in sliding friction contact with the upper inclined surfaces of the first and second horizontal wedges, respectively. The two inclined surfaces of the second vertical wedge are in sliding friction contact with the lower inclined surfaces of the first and second horizontal wedges, respectively. The sum of the inclination angles of the inclined surfaces of the horizontal and vertical wedges in sliding friction contact is equal to 90°. The support component is positioned in the gap formed by the contact of the horizontal and vertical wedges. Mild steel, which is fixed to the outside of the vertical wedge; The outer plate is sleeved on the outside of the wedge block assembly. The outer plate includes a base plate and two slide rails. The two slide rails are arc-shaped tracks. The two slide rails are fixedly connected to the upper and lower ends of the base plate, respectively. The slide rails are slidably connected to the soft steel set on the outside of the vertical wedge block to dissipate energy and convert the horizontal displacement of the building into vertical displacement. The load control module passes through the outer plate and is connected to any horizontal wedge, and a helical spring is provided between the horizontal wedge and the load control module.

2. A metal friction self-resetting damper with displacement scaling function according to claim 1, characterized in that, The metal friction self-resetting damper has a prestressed state in which the left and right ends of the support component are tightly attached to the horizontal wedges and bear the prestress of the prestressed steel strands when no earthquake occurs, and a self-resetting state in which the energy accumulated by the prestressed steel strands and the helical springs causes the horizontal and vertical wedges to gradually reset when an earthquake occurs and the seismic force decreases or stops.

3. A metal friction self-resetting damper with displacement scaling function according to claim 1, characterized in that, The supporting component is a cylindrical structure with multiple first through holes, the first through holes penetrating the two end faces of the cylindrical structure. The horizontal wedge has multiple second through holes, the second through holes penetrating the two planes of the horizontal wedge. The first through holes and the second through holes are arranged correspondingly. The prestressed steel strand passes through the cylindrical structure through the first through holes, and its two ends extend to the outside of the cylindrical structure and are anchored to the two horizontal wedges through the second through holes.

4. A metal friction self-resetting damper with displacement scaling function according to claim 3, characterized in that, The first horizontal wedge and the second horizontal wedge are symmetrical from left to right, and the small ends of the first horizontal wedge and the second horizontal wedge are arranged opposite to each other. The first horizontal wedge and the second horizontal wedge are respectively connected to the two end faces of the cylindrical structure. The first vertical wedge and the second vertical wedge are symmetrical about each other, with the small ends of the first vertical wedge and the second vertical wedge facing each other. The first vertical wedge and the second vertical wedge are respectively located at the upper and lower ends of the cylindrical structure.

5. A metal friction self-resetting damper with displacement scaling function according to claim 1, characterized in that, The inclination angle of the two inclined surfaces of the first horizontal wedge and the second horizontal wedge is 45°, the inclination angle of the two inclined surfaces of the first vertical wedge and the second vertical wedge is 45°, and the ratio of the vertical displacement conversion rate of the vertical wedge to the conversion rate of the horizontal wedge is 1:

1.

6. A metal friction self-resetting damper with displacement scaling function according to claim 4, characterized in that, The outer plate also includes a side plate, which is disposed on the left side of the bottom plate, and the load control module is connected to the first horizontal wedge through a through hole in the side plate.

7. A metal friction self-resetting damper with displacement scaling function according to claim 1, characterized in that, The load control module is a cylindrical structure, and the helical spring is sleeved on the cylindrical structure.

8. A metal friction self-resetting damper with displacement scaling function according to claim 1, characterized in that, The load control module is connected to the building structure via a connecting device.

Images