CN114934607A - Metal-variable friction composite damper with dual energy consumption characteristics - Google Patents
Metal-variable friction composite damper with dual energy consumption characteristics Download PDFInfo
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- CN114934607A CN114934607A CN202210759464.5A CN202210759464A CN114934607A CN 114934607 A CN114934607 A CN 114934607A CN 202210759464 A CN202210759464 A CN 202210759464A CN 114934607 A CN114934607 A CN 114934607A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
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Abstract
The invention provides a metal-variable friction composite damper with double energy consumption characteristics, and belongs to the technical field of civil engineering earthquake resistance. The damper comprises an upper connecting metal plate, a middle connecting metal plate and a lower connecting metal plate, wherein the upper connecting plate and the lower connecting plate are fixedly connected with a main body structure through bolts respectively, at least one energy dissipation metal plate is arranged between the middle connecting metal plate and the upper connecting metal plate, a sliding metal plate and a friction energy dissipation metal plate are sequentially arranged between the middle connecting metal plate and the lower connecting metal plate, and a pre-tightening force applying mechanism sequentially penetrates through the middle connecting metal plate, the sliding metal plate, the friction energy dissipation metal plate and the lower connecting metal plate and is used for applying pre-tightening force for clamping the sliding metal plate and the friction energy dissipation metal plate. The invention overcomes the defect that the traditional friction damper only provides rigidity for the structure and cannot exert energy consumption capability when in a stop stage in the vibration process, thereby realizing the effect of double energy consumption and meeting the performance requirement of multistage earthquake fortification of the structure.
Description
Technical Field
The invention relates to the technical field of civil engineering earthquake resistance, in particular to a metal-variable friction composite damper with double energy consumption characteristics.
Background
The energy dissipation and shock absorption structure is characterized in that an energy dissipation and shock absorption device (such as a metal damper, a friction damper and the like) is installed in a building, and the earthquake energy input into the structure is dissipated through the relative deformation of the energy dissipation and shock absorption device, so that the expected earthquake absorption and shock absorption requirements are met. The traditional metal damper is limited by the plastic deformation capability of metal materials, and under the action of high-intensity earthquakes (particularly extremely rare earthquakes), the traditional metal damper has the risk of failure and damage due to limited plastic deformation capability. In addition, the traditional friction damper can only play a friction energy dissipation role when the thrust force exceeds the sliding force, and when the thrust force is smaller than the sliding force and is in a stop state, the damper cannot play the friction energy dissipation role, namely, the friction damper cannot play the energy dissipation role when being in the stop state under the action of a frequent earthquake or a very rare earthquake, so that the requirement of the structure on the multi-water quasi-seismic fortification is difficult to meet.
Therefore, the development of a novel damper which has a large stroke, strong robustness and low manufacturing cost and is suitable for engineering application is urgently needed.
Disclosure of Invention
The present invention has been made in an effort to provide a metal-variable friction composite damper having dual dissipative characteristics, which can solve the problems of the background art as set forth above.
The invention provides a metal-variable friction composite damper with double energy consumption characteristics, which comprises: the device comprises an upper connecting metal plate, at least one middle connecting metal plate and a lower connecting metal plate, wherein the upper connecting plate and the lower connecting plate are fixedly connected with a main body structure through bolts respectively, at least one energy dissipation metal plate is arranged between the middle connecting metal plate close to the lower connecting metal plate and the upper connecting metal plate or between the middle connecting metal plates close to the upper connecting metal plate and the lower connecting metal plate, a sliding metal plate and a friction energy dissipation metal plate are sequentially arranged between the middle connecting metal plate and the lower connecting metal plate or between the middle connecting metal plates close to the middle connecting metal plate and the upper connecting metal plate, and a pre-tightening force applying mechanism sequentially penetrates through the middle connecting metal plate, the sliding metal plate, the friction energy dissipation metal plate and the lower connecting metal plate or the upper connecting metal plate and is used for applying pre-tightening force for clamping the sliding metal plate and the friction energy dissipation metal plate.
As a preferred technical scheme, the number of the middle connecting metal plates is one, the bottom end of the energy consumption metal plate is fixedly connected with the middle connecting metal plate, the top end of the energy consumption metal plate is fixedly connected with the upper connecting metal plate, and the middle connecting metal plate is connected with the lower connecting metal plate through the pretightening force applying mechanism.
As a preferred technical scheme, the number of the middle connecting metal plates is two, the energy dissipation metal plates are arranged between the two middle connecting metal plates, the top ends and the bottom ends of the energy dissipation metal plates are respectively and fixedly connected with the middle connecting metal plates, and the middle connecting metal plates are respectively connected with the upper connecting metal plate and the lower connecting metal plate through the pretightening force applying mechanism.
Further, the pre-tightening force applying mechanism comprises a high-strength bolt, a pre-tightening spring, a washer and a fixing nut, the high-strength bolt sequentially penetrates through the middle connecting metal plate, the sliding metal plate, the friction energy consumption metal plate and the lower connecting metal plate or the upper connecting metal plate and is installed in a matched mode with the fixing nut, and the pre-tightening spring and the washer are installed between the root of the high-strength bolt and the surface of the middle connecting metal plate.
Further, the pre-tightening spring is a disc spring.
Furthermore, a first clamping groove is formed in the bottom or the top of the middle connecting metal plate, the top or the bottom of the sliding metal plate is clamped in the first clamping groove, a second clamping groove is formed in the top of the lower connecting metal plate or the bottom of the upper connecting metal plate, the bottom or the top of the friction energy consumption metal plate is clamped in the second clamping groove, multiple groups of corresponding round holes are formed in the middle connecting metal plate and the sliding metal plate, long holes corresponding to the round holes are formed in the friction energy consumption metal plate and the lower connecting metal plate or the upper connecting metal plate, and the high-strength bolt sequentially penetrates through the round holes and the long holes and is installed in a matched mode with the fixing bolt.
Furthermore, the upper connecting metal plate, the middle connecting metal plate, the lower connecting metal plate and the sliding metal plate are all rectangular steel plate pieces.
Furthermore, the number of the energy consumption metal plates is one or more, the energy consumption metal plates are made of steel plates or shape memory alloys, the energy consumption metal plates are rectangular, hollows are arranged on the surfaces of the energy consumption metal plates or arc edges are arranged on the two sides of the energy consumption metal plates, and the hollow shapes are rhombus, square or long strips.
Furthermore, the friction energy dissipation metal plate is a steel plate, the friction energy dissipation metal plate is a single-side friction type or a symmetrical friction type, and the friction coefficients of the surfaces of the friction energy dissipation metal plates are the same.
Furthermore, the friction energy dissipation metal plate is a steel plate, the friction energy dissipation metal plate is of a single-side friction type or a symmetrical friction type, areas with different friction coefficients are arranged on the surface of the friction energy dissipation metal plate, and the friction coefficient of the middle area of the surface of the friction energy dissipation metal plate is lower than that of the areas on the two sides of the surface of the friction energy dissipation metal plate.
Compared with the prior art, the invention has the following beneficial effects:
1. the metal-variable friction composite damper is suitable for multistage earthquake fortification, under the action of frequent earthquakes or extremely rare earthquakes, the energy consumption metal plate is firstly used for dissipating energy in a hysteretic manner, when the restoring force is more than or equal to the maximum static friction force of the friction energy consumption metal plate, the current elastic-plastic state of the energy consumption metal plate is kept unchanged, the friction energy consumption metal plate slides, and constant or variable friction force is generated to exert the friction energy consumption capacity; in the vibration process, when the friction energy-consuming metal plate is in a stop state, the energy-consuming metal plate still continuously generates elastic-plastic deformation energy consumption, and the defect that the traditional friction damper only provides rigidity for the structure and cannot exert energy-consuming capacity when in a stop stage in the vibration process is overcome, so that the double energy-consuming effect is realized, and the performance requirement of multistage earthquake-proof fortification of the structure is met;
2. the energy-consuming metal plate always generates elastic-plastic deformation within the extreme displacement, the failure caused by the overlarge displacement of the damper can not occur, and the friction energy-consuming metal plate is designed to have a long enough sliding distance, so that the friction energy-consuming metal plate can still exert the preset friction energy-consuming capacity even under the action of an extremely rare earthquake or a larger earthquake, therefore, the composite damper has the reliable shock absorption capacity with a large stroke and can ensure the non-failure;
3. the friction energy consumption metal plate can be arranged into a plurality of areas with different friction coefficients, so that the energy consumption can be fully realized by using the energy consumption steel plate with a low friction coefficient in a small stroke, and the vibration response of the structure can be better controlled while the friction energy consumption is realized by using the energy consumption steel plate with a high friction coefficient in a large stroke, thereby playing a limiting role, therefore, the friction coefficient of the damper is variable and the limiting role can be played in a large stroke;
4. the damper is simple in structure, clear in working mechanism and simple and easy to produce and manufacture, is particularly suitable for the transformation of a metal damper and an existing damping structure of the metal damper, can be quickly assembled, disassembled and replaced, and is suitable for practical engineering application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic front view of an overall structure according to a first embodiment of the present invention;
FIG. 2 is a schematic side view of a first embodiment of the present invention taken along the longitudinal direction;
FIG. 3 is a schematic diagram of a pretensioning mechanism according to a first embodiment of the present invention;
FIG. 4 is a schematic front view of a power dissipating metal plate according to a first embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a friction dissipative metal sheet according to a second embodiment of the invention;
FIG. 6 is a schematic front view of the overall structure of the third embodiment of the present invention;
FIG. 7 is a schematic side view of a third embodiment of the present invention, taken along the longitudinal direction;
FIG. 8 is a schematic front view of the overall structure of the fourth embodiment of the present invention;
FIG. 9 is a schematic side view of a fourth embodiment of the present invention taken along the longitudinal direction;
FIG. 10 is a schematic front view of the overall structure of the fifth embodiment of the present invention;
fig. 11 is a schematic side view of a fifth embodiment of the present invention, taken along the longitudinal direction.
Description of reference numerals:
1: an upper connection metal plate; 2: a lower connection metal plate; 3: a middle connection metal plate; 4: a power dissipating metal plate; 5: a sliding metal plate; 6: a friction energy dissipating metal plate; 61: a low coefficient of friction region; 62: a high coefficient of friction region; 7: a pre-tightening force applying mechanism; 71: a high-strength bolt; 72: pre-tightening the spring; 73: a gasket; 74: and (5) fixing the nut.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be apparent that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 1 and 2, the present embodiment provides a metal-variable friction composite damper with dual energy dissipation characteristics, which includes an upper connecting metal plate 1, a lower connecting metal plate 2, a middle connecting metal plate 3, an energy dissipation metal plate 4, a sliding metal plate 5, a friction energy dissipation metal plate 6, and a preload applying device 7.
Specifically, the upper connecting metal plate 1 and the lower connecting metal plate 2 are rectangular steel plates with a plurality of bolt holes, and are fixedly connected with the main body structure through high-strength bolts respectively, the energy consumption metal plate 4 is a steel plate made of low-yield-point steel, the top end of the energy consumption metal plate is fixedly connected with the upper connecting metal plate 1, and the bottom end of the energy consumption metal plate is fixedly connected with the middle connecting metal plate 3; the sliding metal plate 5 is superposed above the friction energy dissipation metal plate 6 to form a friction energy dissipation group, the friction energy dissipation group and the pretightening force exerting mechanism are placed between the middle connecting metal plate 3 and the lower connecting metal plate 2, and the pretightening force exerting mechanism 7 sequentially penetrates through the middle connecting metal plate 3, the sliding metal plate 5, the friction energy dissipation metal plate 6 and the lower connecting metal plate 2 and is fastened to exert a preset normal pressure on the friction energy dissipation group, namely, to provide a clamping pretightening force between the friction energy dissipation group and the pretightening force.
As shown in fig. 3, in the present embodiment, the pre-tightening force applying mechanism 7 includes a high-strength bolt 71, a pre-tightening spring 72, a washer 73 and a fixing nut 74, wherein the pre-tightening spring 72 is a disc spring, the washer 73 is a high-strength washer, the high-strength bolt 71 sequentially passes through the pre-tightening spring 72, the washer 73, the middle connecting metal plate 3, the sliding metal plate 5, the friction dissipative metal plate 6 and the lower connecting metal plate 2, and is adapted to be tightened by the fixing nut 74, and a predetermined normal pressure, i.e., a pre-tightening force, can be applied to the friction dissipative group composed of the sliding metal plate 5 and the friction dissipative metal plate 6 by tightening the fixing nut 74 and the pre-tightening spring 72.
Specifically, a first clamping groove is formed in the bottom of the middle connecting metal plate 3, the top of the sliding metal plate 5 is clamped in the first clamping groove, a second clamping groove is formed in the top of the lower connecting metal plate 2, the bottom of the friction energy consumption metal plate 6 is clamped in the second clamping groove, multiple groups of corresponding round holes are formed in the middle connecting metal plate 3 and the sliding metal plate 5, long holes corresponding to the round holes are formed in the friction energy consumption metal plate 6 and the lower connecting metal plate 2, and the high-strength bolts 71 sequentially penetrate through the round holes and the long holes corresponding to the groups and are installed in a matched mode with the fixing bolts 74, so that the friction energy consumption groups are applied with clamping pre-tightening force. Under the action of a frequent earthquake or even an extremely rare earthquake, the energy-consuming metal plate 4 firstly consumes energy in a hysteresis way, and when the restoring force is more than or equal to the maximum static friction force of the friction energy-consuming metal plate 6, the energy-consuming metal plate 4 keeps the current elastic-plastic state unchanged, the middle connecting metal plate 3 and the sliding metal plate 5 act integrally, and slide relative to the friction energy-consuming metal plate 6 and the lower connecting metal plate 2 to generate constant or variable friction force so as to exert the friction energy-consuming capacity.
In the present embodiment, the upper connecting metal plate 1, the middle connecting metal plate 3, the lower connecting metal plate 2, and the sliding metal plate 5 are all rectangular steel plate members. The energy consumption metal plates 4 are made of steel plates or shape memory alloys, the energy consumption metal plates 4 are rectangular, hollows are formed in the surfaces of the energy consumption metal plates 4 or arc edges are formed on the two sides of the energy consumption metal plates, and the hollows are diamond-shaped, square-shaped or long-strip-shaped, as shown in fig. 4.
Specifically, the friction energy dissipation metal plate 6 is made of a low yield point steel material, and can be produced by using a shape memory alloy material according to actual engineering requirements, the friction energy dissipation metal plate 6 is of a single-sided friction type or a symmetrical friction type (i.e., friction areas are arranged on the upper surface and the lower surface), and in this embodiment, the friction coefficients of the surfaces of the friction energy dissipation metal plates 6 are the same.
Specifically, when the damper moves left (right) (smaller than the sliding movement of the friction energy consumption steel plate 6), the upper connecting metal plate 1 moves the same, and the upper end of the energy consumption metal plate 4 is fixed with the upper connecting metal plate 1The connection also generates the same displacement, and the lower end of the energy dissipation metal plate 4 fixedly connected with the middle connection metal plate 3 is less than F because of the output force thereof f And the energy dissipation metal plate 4 is in a reciprocating hysteresis energy dissipation state, the friction energy dissipation metal plate 6 is in a static state, and the energy dissipation effect of the energy dissipation metal plate 4 under small displacement is fully exerted.
Specifically, when the damper is displaced to the left (to the right) (greater than the sliding displacement of the friction energy-consuming steel plate 6), the upper connecting metal plate 1 is displaced in the same manner, the upper end of the energy-consuming metal plate 4 is fixedly connected to the upper connecting metal plate 1 and also displaced in the same manner, and the lower end of the energy-consuming metal plate 4 fixedly connected to the middle connecting metal plate 3 is greater than F due to the output thereof f The same displacement occurs when the friction energy dissipation metal plate 4 is in a static state, the friction energy dissipation metal plate 6 is in a friction energy dissipation state, and the friction energy dissipation metal plate 6 is in a friction energy dissipation state, so that the friction energy dissipation metal plate 6 can fully exert the energy dissipation effect under large displacement.
In summary, in the embodiment, the energy-consuming metal plate 4 and the friction energy-consuming metal plate 6 can both exert the predetermined energy-consuming effect under the condition of frequent earthquake or even rare earthquake, so that the purpose of fully consuming energy of the device in the whole life cycle of the structure is achieved, and the performance goal of multistage earthquake fortification of the structure is further met.
Example two
In the first embodiment, the friction dissipating metal plate 6 is a single friction dissipating plate with a fixed friction coefficient, and in the present embodiment, the friction dissipating metal plate 6 has different friction coefficient regions on its surface, specifically, a low friction coefficient region 61 in the middle of the surface and high friction coefficient regions 62 on both sides, as shown in fig. 5. The initial position of the sliding metal plate 5 is located in the middle of the low friction coefficient area 61, and when the device generates reciprocating small-stroke displacement (the sliding displacement exceeds the starting displacement of the low friction coefficient area 61), the sliding metal plate 5 always performs reciprocating motion within the length range of the low friction coefficient area 61, so that the low friction coefficient area 61 is utilized to exert preset friction energy consumption capacity; when the device generates a reciprocating large stroke displacement (exceeding the sliding displacement of the high friction coefficient area 62), the high friction coefficient area 62 is utilized to exert the preset friction energy consumption capability. Through the friction energy dissipation metal plate 6 with the high and low friction coefficient areas, the friction coefficient of the device is variable, and the vibration response of the structure is better controlled and the limiting effect is achieved while friction energy dissipation is achieved.
EXAMPLE III
On the basis of the first embodiment, in the present embodiment, the number of the middle connection metal plates 3 is two, the energy dissipation metal plate 4 is disposed between the two middle connection metal plates 3, and the top end and the bottom end of the energy dissipation metal plate 4 are respectively fixedly connected to each of the middle connection metal plates 3. In this embodiment, a friction energy dissipating set composed of a sliding metal plate 5 and a friction energy dissipating metal plate 6 is also disposed between the upper middle connecting metal plate 3 and the upper connecting metal plate 1, and the friction energy dissipating set, the middle connecting metal plate 3 and the upper connecting metal plate 1 are also applied with a normal pretightening force by a pretightening force applying mechanism 7, and the structure and connection relationship thereof are symmetrical to the positions and connection relationship of the friction energy dissipating set, the middle connecting metal plate 3 and the lower connecting metal plate 2 with respect to the middle horizontal line of the energy dissipating metal plate 4 in the first embodiment, as shown in fig. 6 and 7.
By the mode, the friction energy consumption effect can be improved, under the action of a frequently encountered earthquake or an extremely rare earthquake, the energy consumption metal plate 4 arranged between the two connecting metal plates 3 can delay and consume energy, when the restoring force is more than or equal to the maximum static friction force of the upper friction energy consumption metal plate 6 and the lower friction energy consumption metal plate 6, the energy consumption metal plate 4 keeps the current elastic-plastic state unchanged, the upper friction energy consumption metal plate 4 and the lower friction energy consumption metal plate 4 slide relative to each other with the sliding metal plate 5, and constant or variable friction force is generated to exert the friction energy consumption capability. Compared with the technical scheme in the first embodiment, the relative sliding displacement of the friction energy consumption group after friction energy consumption is larger, and the energy consumption is more.
Example four
On the basis of the first embodiment, the energy dissipation metal plates 4 in the present embodiment are multiple in number, as shown in fig. 8 and 9, the multiple energy dissipation metal plates 4 are simultaneously bent to achieve further bending energy dissipation, and the original shearing energy dissipation is converted into bending energy dissipation, so as to obtain a higher elastic-plastic deformation energy dissipation effect.
EXAMPLE five
On the basis of the third embodiment, the number of the energy dissipation metal plates 4 in the embodiment is set to be multiple groups according to the actual engineering requirements, as shown in fig. 10 and 11, so that the friction energy dissipation effect is improved, and meanwhile, the bending energy dissipation is further realized through the simultaneous bending deformation of the multiple groups of energy dissipation metal plates 4, so that the elastoplastic deformation energy dissipation effect of the damper is improved while the higher friction energy dissipation efficiency is realized.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A metal-variable friction composite damper with dual dissipative characteristics, comprising: the device comprises an upper connecting metal plate, at least one middle connecting metal plate and a lower connecting metal plate, wherein the upper connecting plate and the lower connecting plate are fixedly connected with a main body structure through bolts respectively, at least one energy dissipation metal plate is arranged between the middle connecting metal plate close to the lower connecting metal plate and the upper connecting metal plate or between the middle connecting metal plates close to the upper connecting metal plate and the lower connecting metal plate, a sliding metal plate and a friction energy dissipation metal plate are sequentially arranged between the middle connecting metal plate and the lower connecting metal plate or between the middle connecting metal plates close to the middle connecting metal plate and the upper connecting metal plate, and a pre-tightening force applying mechanism sequentially penetrates through the middle connecting metal plate, the sliding metal plate, the friction energy dissipation metal plate and the lower connecting metal plate or the upper connecting metal plate and is used for applying pre-tightening force for clamping the sliding metal plate and the friction energy dissipation metal plate.
2. The metal-variable friction composite damper with dual dissipative characteristics according to claim 1, wherein the number of the middle connecting metal plate is one, the bottom end of the dissipative metal plate is fixedly connected to the middle connecting metal plate, the top end of the dissipative metal plate is fixedly connected to the upper connecting metal plate, and the middle connecting metal plate is connected to the lower connecting metal plate through the pre-tightening force applying mechanism.
3. The metal-variable friction composite damper with dual dissipative characteristics according to claim 1, wherein the number of the middle connecting metal plates is two, the dissipative metal plate is disposed between the two middle connecting metal plates, the top and bottom ends of the dissipative metal plate are respectively and fixedly connected to the middle connecting metal plates, and each of the middle connecting metal plates is respectively connected to the upper connecting metal plate and the lower connecting metal plate through the pre-tightening force applying mechanism.
4. The metal-variable friction composite damper with dual dissipative characteristics according to claim 2 or 3, wherein the pre-tightening force applying mechanism comprises a high-strength bolt, a pre-tightening spring, a washer and a fixing nut, the high-strength bolt passes through the middle connection metal plate, the sliding metal plate, the friction dissipative metal plate and the lower connection metal plate or the upper connection metal plate in sequence and is fittingly installed with the fixing nut, and the pre-tightening spring and the washer are installed between the root of the high-strength bolt and the surface of the middle connection metal plate.
5. The metal-variable friction composite damper with dual dissipative characteristics according to claim 4, wherein the pre-tightening spring is a disc spring.
6. The metal-variable friction composite damper with dual energy dissipation characteristics as claimed in claim 4, wherein a first slot is formed at the bottom or top of the middle connection metal plate, the top or bottom of the sliding metal plate is clamped in the first slot, a second slot is formed at the top of the lower connection metal plate or bottom of the upper connection metal plate, the bottom or top of the friction energy dissipation metal plate is clamped in the second slot, multiple sets of corresponding round holes are formed on the middle connection metal plate and the sliding metal plate, long holes corresponding to the round holes are formed on the friction energy dissipation metal plate and the lower connection metal plate or the upper connection metal plate, and the high-strength bolt sequentially passes through the round holes and the long holes and is installed in a manner of being matched with the fixing bolt.
7. The metal-variable friction composite damper with dual dissipative characteristics according to claim 2 or 3, wherein the upper connecting metal plate, the middle connecting metal plate, the lower connecting metal plate, the sliding metal plate are all rectangular steel plate pieces.
8. The metal-variable friction composite damper with dual energy consumption characteristics as claimed in claim 2 or 3, wherein the number of the energy consumption metal plates is one or more, the energy consumption metal plates are made of steel plates or shape memory alloys, the energy consumption metal plates are rectangular, the surfaces of the energy consumption metal plates are provided with hollows or both sides of the energy consumption metal plates are provided with arc edges, and the hollows are diamond-shaped, square-shaped or strip-shaped.
9. The metal-variable friction composite damper with dual dissipative characteristics according to claim 2 or 3, wherein the dissipative friction metal sheet is a steel sheet, the dissipative friction metal sheet is a single-sided friction type or a symmetric friction type, and the frictional coefficients of the dissipative friction metal sheet surface are the same.
10. The metal-variable friction composite damper with dual dissipative characteristics according to claim 2 or 3, wherein the friction dissipative metal sheet is a steel sheet, the friction dissipative metal sheet is a single-sided friction type or a symmetrical friction type, the surface of the friction dissipative metal sheet is provided with regions with different friction coefficients, and the friction coefficient of the middle region of the surface of the friction dissipative metal sheet is lower than that of the two side regions.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115478631A (en) * | 2022-11-03 | 2022-12-16 | 重庆大学 | Hybrid self-resetting damping device capable of realizing multistage limiting energy consumption and application thereof |
| CN117536088A (en) * | 2024-01-09 | 2024-02-09 | 中裕铁信交通科技股份有限公司 | Heterogeneous metal damping rod and manufacturing method thereof |
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| CN213017446U (en) * | 2020-08-06 | 2021-04-20 | 武汉桥之恒桥梁工程技术有限公司 | Friction damping shock insulation steel support with prevent roof beam function that falls |
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| CN115478631A (en) * | 2022-11-03 | 2022-12-16 | 重庆大学 | Hybrid self-resetting damping device capable of realizing multistage limiting energy consumption and application thereof |
| CN117536088A (en) * | 2024-01-09 | 2024-02-09 | 中裕铁信交通科技股份有限公司 | Heterogeneous metal damping rod and manufacturing method thereof |
| CN117536088B (en) * | 2024-01-09 | 2024-04-02 | 中裕铁信交通科技股份有限公司 | Heterogeneous metal damping rod and manufacturing method thereof |
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| CN114934607B (en) | 2023-03-21 |
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