CN116837979B - Self-resetting vibration damper for amplifying damping energy consumption - Google Patents
Self-resetting vibration damper for amplifying damping energy consumption Download PDFInfo
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- CN116837979B CN116837979B CN202310712132.6A CN202310712132A CN116837979B CN 116837979 B CN116837979 B CN 116837979B CN 202310712132 A CN202310712132 A CN 202310712132A CN 116837979 B CN116837979 B CN 116837979B
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- 238000013016 damping Methods 0.000 title claims abstract description 69
- 238000005265 energy consumption Methods 0.000 title claims abstract description 61
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 71
- 238000006073 displacement reaction Methods 0.000 claims abstract description 30
- 238000011084 recovery Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 4
- 230000005489 elastic deformation Effects 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 13
- 230000004044 response Effects 0.000 abstract description 11
- 230000009467 reduction Effects 0.000 abstract description 8
- 238000002955 isolation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 230000009471 action Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000002195 synergetic effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
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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
- E04H9/0215—Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention relates to the technical field of vibration reduction and vibration isolation, and provides a self-resetting vibration reduction device for amplifying damping energy consumption, which comprises a self-resetting damper, wherein the self-resetting damper can provide motion resistance and has a self-resetting function, and one end of the self-resetting damper is arranged on a column or a foundation; a displacement amplifying device, the displacement amplifying device comprising: two groups of support member units and steel strands, wherein one group of support member units is arranged on the column body, the other group of support member units is arranged on the foundation, and each group of support member units comprises a plurality of support members which are arranged at intervals in sequence; the steel strand wires are wound on the support piece of cylinder and the support piece of basis in proper order. The invention amplifies the response input of the damper by times based on the amplifying effect of the displacement amplifying device, effectively dissipates the vibration energy of the structure, and simultaneously realizes self-resetting of the device after energy consumption; and the size of the device can be reduced due to the amplifying effect of the displacement amplifying device, so that the engineering cost is reduced.
Description
Technical Field
The invention relates to the technical field of vibration reduction and vibration isolation, in particular to a self-resetting vibration reduction device for amplifying damping energy consumption.
Background
The structure can vibrate under the load actions of wind, earthquake, wave and the like, and excessive vibration can lead to fatigue and failure of the component, and even collapse and damage of the structure. In order to solve the problem, the early traditional method emphasizes 'resistance', namely, the overall rigidity and bearing capacity of the structure are improved by increasing the size of the component, and the aim of reducing the response is achieved. However, this approach can significantly increase the engineering cost and possibly amplify the acceleration response of the structure, with certain limitations. The American Walsh scholars J.T.P.Yao in 1972 put forward the concept of structure vibration control for the first time, namely the capability of the structure for resisting external load is improved by adding a control device, and the new era of vibration control research is started. Structural vibration control can be classified into passive control, active control, and semi-active control according to whether external energy input is relied upon. Among them, passive control is attracting attention in the engineering field due to advantages of clear concept, simple construction, no need of external energy input, and the like. At present, a common passive control device mainly comprises: energy-dissipating vibration damping devices (e.g., viscous dampers), vibration isolation devices (e.g., lead rubber mounts), and dynamic vibration absorbing devices (e.g., tuned mass dampers). Related studies indicate that: all three types of passive control strategies can effectively inhibit structural vibration response. However, current vibration control techniques still have certain limitations. Therefore, the development of new vibration control techniques that are more efficient and practical is critical to reducing the vibration response of the structure.
Although structural vibration control has been developed for decades, there remain a number of problems with existing passive vibration damping techniques, including: when the structural response is smaller, the traditional vibration damper has limited energy consumption effect, and cannot sufficiently restrain the structural vibration response; under the condition of certain required damping, the traditional vibration reduction device has large size and high cost, and is not beneficial to practical engineering application; most of the traditional vibration reduction devices do not have self-resetting capability, can not realize rapid recovery of post-earthquake structural functions, and do not meet the requirement of toughness.
Disclosure of Invention
The invention provides a self-resetting vibration damper for amplifying damping energy consumption, which solves the problems that the traditional vibration damper cannot have good energy consumption capacity, self-resetting capacity and device miniaturization.
The invention provides a self-resetting vibration damper for amplifying damping energy consumption, which comprises:
the self-resetting damper can provide motion resistance and has a self-resetting function, and one end of the self-resetting damper is arranged on a column or a foundation;
a displacement amplifying device, the displacement amplifying device comprising: a displacement amplifying device, the displacement amplifying device comprising: two groups of support member units and steel strands, wherein one group of support member units is arranged on the column body, the other group of support member units is arranged on the foundation, and each group of support member units comprises a plurality of support members which are arranged at intervals in sequence; the steel stranded wires are sequentially wound on the supporting piece of the column body and the supporting piece of the foundation, one end of each steel stranded wire is connected with the foundation or the column body, and the other end of each steel stranded wire is connected with the other end of the self-resetting damper; the steel strand is movable relative to the support.
According to the self-resetting vibration damper for amplifying damping energy consumption, the supporting piece comprises the supporting seat and the bearing part arranged on the supporting seat and used for bearing the steel strand, the steel strand is in rolling contact or sliding contact with the bearing part, and the supporting seat is connected to the column body or the foundation.
According to the self-resetting vibration damper for amplifying damping energy consumption, which is provided by the invention, the bearing part is the roller, the support is penetrated with the groove, the roller is arranged in the groove, the roller can rotate in the groove, and the steel stranded wire is contacted with the roller.
According to the self-resetting vibration damper for amplifying damping energy consumption, the support piece has the freedom degree along the swinging direction of the column body.
According to the self-resetting vibration damper for amplifying damping energy consumption, which is provided by the invention, the support piece and the column body can be movably connected or/and the support piece and the foundation can be movably connected.
According to the self-resetting vibration damper for amplifying damping energy consumption, which is provided by the invention, a hinged support is arranged between the support piece and the column body or/and a hinged support is arranged between the support piece and the foundation.
According to the self-resetting vibration damper for amplifying damping energy consumption, which is provided by the invention, the self-resetting vibration damper comprises a damper and an elastic piece, one end of the elastic piece is connected with a piston rod of the damper, the other end of the elastic piece is connected with a cylinder body of the damper, the cylinder body is connected on the basis, and the piston rod is connected with the other end of the steel strand; under external acting force, the piston rod moves relative to the cylinder body, the elastic piece deforms, and when no external acting force exists, the piston rod resets along with the recovery of the elastic piece elastic deformation.
According to the self-resetting vibration damper for amplifying damping energy consumption, which is provided by the invention, the damper comprises a piston rod and a cylinder body, the elastic piece is a spring, the spring is sleeved outside the damper, one end of the spring is connected with the piston rod, and the other end of the spring is connected with the cylinder body.
The self-resetting vibration damper for amplifying damping energy consumption provided by the invention further comprises a column connecting piece, wherein the column connecting piece is arranged on the column, and the supporting piece is arranged on the column connecting piece.
According to the self-resetting vibration damper for amplifying damping energy consumption, which is provided by the invention, the displacement amplifying device is symmetrically arranged by taking the self-resetting damper as a center.
The technical scheme of the invention at least has the following technical effects:
according to the self-resetting vibration damper for amplifying damping energy consumption, the self-resetting damper and the displacement amplifying device are connected in series, when the column body vibrates and swings, the distance between the supporting piece on the column body and the supporting piece on the foundation is increased or reduced, when the distance between the supporting piece on the column body and the supporting piece on the foundation is increased, steel strands between the supporting pieces on the column body and the supporting piece on the foundation are transmitted to the self-resetting damper after being overlapped with each other in length which is required to be increased, and the self-resetting damper is pulled to move, so that the self-resetting damper starts energy consumption work; when the distance between the supporting piece on the column body and the supporting piece on the foundation is reduced, the steel stranded wires between the supporting piece on the column body and the supporting piece on the foundation start to have a continuous loosening trend, the self-resetting damper has a continuous retracting trend under the self-resetting effect, and the self-resetting damper is pulled back to the initial position under the self-resetting effect. Based on the amplifying effect of the displacement amplifying device, the response input of the damper is amplified in multiple, the vibration energy of the structure is effectively dissipated, and meanwhile, the device can realize self-resetting after energy consumption; and the size of the device can be reduced due to the amplifying effect of the displacement amplifying device, so that the engineering cost is reduced.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of the overall structure of a self-resetting vibration damping device for amplifying damping energy consumption according to an embodiment of the present invention;
FIG. 2 is a side view of the overall structure of the self-resetting vibration damping device with amplified damping and energy consumption according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a self-resetting swing structure according to another embodiment of the invention.
FIG. 4 is an initial state diagram of a self-resetting vibration damper for amplifying damping energy consumption according to an embodiment of the present invention;
FIG. 5 is a diagram showing an operation state of the self-resetting vibration damping device for amplifying damping energy consumption according to the embodiment of the present invention;
FIG. 6 is a recovery state diagram of a self-resetting vibration damper for amplifying damping energy consumption according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a self-healing damper according to an embodiment of the present invention;
FIG. 8 is a schematic view of a support member according to an embodiment of the present invention;
fig. 9 is a diagram showing the vibration damping effect of the self-resetting vibration damping device for amplifying damping energy consumption according to the embodiment of the present invention.
Reference numerals:
1. a column; 2. a foundation; 3. a self-resetting damper; 4. a displacement amplifying device; 5. a hinged support; 6. a column connector; 7. a stop block;
31. a damper; 32. an elastic member;
311. a piston rod; 312. a cylinder; 313. a first connector; 314. a second connector;
41. a support; 42. steel strand;
411. a support; 412. a carrying part; 413. a groove.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present invention and simplify description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. It should also be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as indirectly coupled, through intermediaries, for example, as may be fixedly coupled, detachably coupled, or integrally coupled, unless explicitly stated or otherwise. The specific meaning of the terms in the embodiments of the present invention will be understood in detail by those skilled in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The self-resetting vibration damper and the self-resetting swing structure for amplifying damping energy consumption according to the present invention will be described in detail with reference to fig. 1 to 8.
The self-resetting vibration damper for amplifying damping energy consumption is arranged on a column 1 and a foundation 2 at the bottom of the column and is used for suppressing vibration generated by the column 1.
The embodiment of the invention discloses a self-resetting vibration damper for amplifying damping energy consumption, which comprises:
the self-resetting damper 3, the self-resetting damper 3 can provide motion resistance and has a self-resetting function, and one end of the self-resetting damper 3 is arranged on the column 1 or the foundation 2.
The displacement amplifying device 4, the displacement amplifying device 4 includes: two groups of support member units and steel strands 42, wherein one group of support member units is arranged on the column 1, the other group of support member units is arranged on the foundation 2, and each group of support member units comprises a plurality of support members 41 which are arranged at intervals in sequence; the steel stranded wires 42 are sequentially wound on the supporting piece 41 of the column 1 and the supporting piece 41 of the foundation 2, one end of each steel stranded wire 42 is connected with the foundation 2 or the column 1, and the other end of each steel stranded wire 42 is connected with the other end of the self-healing damper 3; the steel strands 42 are movable relative to the support 41.
As shown in fig. 1, one end of a steel strand 42 is arranged on a foundation 2, one end of a self-healing damper 3 is also arranged on the foundation 2, and the other end of the steel strand 42 is connected with the other end of the self-healing damper 3; one end of the steel strand 42 can be arranged on the column 1, one end of the self-resetting damper 3 is arranged on the foundation 2, or one end of the steel strand 42 is arranged on the column 1, one end of the self-resetting damper 3 is also arranged on the column 1, or one end of the steel strand 42 is arranged on the foundation 2, and one end of the self-resetting damper 3 is also arranged on the column 1.
In the invention, the supporting pieces 41 provide stress supporting points for the steel stranded wires 42, and the steel stranded wires 42 are distributed back and forth between the upper supporting piece 41 and the lower supporting piece 41, so that the steel stranded wires form a plurality of stress points on a column body and a foundation. Under the action of earthquake load, the column 1 does not swing relative to the foundation 2, the distance between the supporting piece 41 on the column 1 and the supporting piece 41 on the foundation 2 is increased or reduced, when the distance between the supporting piece 41 on the column 1 and the supporting piece 41 on the foundation 2 is increased, the length of the section of steel stranded wire between the supporting piece 41 on the column 1 and the supporting piece 41 on the foundation 2 is also prolonged, because the steel stranded wires 42 are continuous, the steel stranded wires between the supporting pieces 41 on the column 1 and the supporting piece 41 on the foundation 2 are required to be overlapped with each other and then are transferred to the self-resetting damper 3, and the self-resetting damper 3 is pulled to move, so that the self-resetting damper 3 starts energy consumption work; when the distance between the support 41 on the column 1 and the support 41 on the foundation 2 decreases, the section of the steel strand between the support 41 on the column 1 and the support 41 on the foundation 2 starts to have a tendency to be continuously loosened, the self-resetting damper 3 has a tendency to be continuously retracted under the self-resetting action, and the self-resetting damper 3 is pulled back to the initial position under the self-resetting action.
In the embodiment of the present invention, the supporting member 41 includes a support 411 and a bearing portion 412 disposed on the support 411 for bearing the steel strand 42, where the steel strand 42 is in rolling contact or sliding contact with the bearing portion 412, and the support 411 is connected to the column 1 or the foundation 2, so as to facilitate movement of the steel strand 42.
The rolling contact is preferable in this embodiment, and the steel strand movement resistance is reduced. Specifically, referring to fig. 1 and 8, the bearing portion 412 is a roller, a groove 413 is penetrated through the support 411, so that the support 411 integrally forms a U-shaped structure, the roller is disposed in the groove 413, the roller can rotate in the groove 413, the steel strand 42 contacts with the roller, and the steel strand 42 moves and displaces due to rotation of the roller. It will be appreciated that in the present embodiment, the rollers are coupled to both sides of the slot 413 via shafts such that the rollers are capable of rotating.
It will be appreciated that, in another specific example of the embodiment of the present invention, the steel strand 42 and the bearing portion 412 may be set to be in sliding contact, specifically, an arc convex surface may be provided on the bearing portion 412 as a bearing surface of the steel strand 42, the steel strand 42 may move along an arc direction of the arc convex surface, and the arc convex structure may reduce a contact area between the bearing surface and the steel strand 42 as much as possible while providing a supporting point for the steel strand 42, thereby reducing a moving resistance of the steel strand and facilitating movement of the steel strand.
In the preferred embodiment of the present invention, the support 41 has a degree of freedom in the sway direction of the column 1, and when the column 1 sway side to side, as exemplified in fig. 2, the support 41 has a degree of freedom in the side to side direction. When the column 1 swings, the steel strands 42 are made parallel to the side of the column 1, so that the displacement synergistic effect is reduced and maximized due to non-parallelism.
Specifically, the support 41 and the column 1 may be movably connected or/and the support 41 and the foundation 2 may be movably connected, that is, at least one of the support 41 and the column 1 and the support 41 and the foundation 2 may be movably connected, and in view of stress, it is preferable that the support 41 and the foundation 2 may be movably connected, and the support 41 and the column 1 may be fixedly connected.
In an embodiment of the invention, a hinged support 5 is provided between the support 41 and the column 1 or/and a hinged support 5 is provided between the support 41 and the foundation 2. Specifically, one end of the hinged support 5 is fixed with the supporting member 41, the other end of the hinged support 5 is fixed on the column 1 or the foundation 2, and the fixing mode is welding or bolting, preferably bolting, and the disassembly and assembly are convenient.
In the embodiment of the present invention, preferably, the supporting members 41 on the column 1 are sequentially arranged in parallel along one direction, the supporting members 41 on the foundation are also sequentially arranged in parallel along one direction, and the supporting members 41 on the column 1 and the supporting members 41 on the foundation 2 are located on the same vertical plane, so that after the steel stranded wires 42 are connected with the supporting members 41, the steel stranded wires 42 are in the vertical direction and parallel to the side surface of the column 1, and the energy consumption stability is improved.
In the embodiment of the present invention, the self-resetting damper 3 also has a degree of freedom in the column swing direction. When the cylinder 1 swings, the self-resetting damper 3 is parallel to the side surface of the cylinder 1, so that the displacement synergistic effect is reduced and is influenced by non-parallelism, and the displacement synergistic effect is maximized. Specifically, the self-resetting damper 3 is movably connected with the column 1 or the foundation 2.
In the specific embodiment of the invention, the hinged support 5 is arranged between the self-resetting damper 3 and the column 1 or the foundation 2, specifically, one end of the hinged support 5 is fixed with the self-resetting damper 3, and the other end of the hinged support 5 is fixed on the column 1 or the foundation 2 in a welding or bolting mode, preferably bolting mode, and convenient disassembly and assembly.
In the embodiment of the present invention, when the steel strand 42 is connected to the end portion with the foundation 2, the steel strand 42 is connected to the foundation 2 by bolts or anchors; when the steel strand 42 is connected with the column 1, a column connecting piece 6 is arranged on the column 1, and the steel strand 42 is connected with the column connecting piece 6 through bolts or anchors. At the same time, the support 41 is also provided on the column connector 6.
In the embodiment of the present invention, the column connecting piece 6 is an ear plate, one end of the ear plate is fixed on the column 1, and the other end is suspended. The upper surface of the column connecting piece 6 is set to be an inclined surface, and the lower surface is a horizontal surface, so that the thickness of the column connecting piece 6 gradually decreases from one end close to the column 1 to one end far away from the column 1, and the connection strength of the column connecting piece 6 is increased.
In another embodiment of the present invention, a stay cable may be provided, one end of which is connected to the suspended end of the column connecting member 6, and the other end of which is connected to the column 1 above the column connecting member 6.
In another embodiment of the present invention, a reinforcing rib may be further provided between the column 1 and the column connecting piece 6 to increase the rigidity of the column connecting piece 6.
It will be appreciated that in embodiments of the present invention, the number of support members 41 may be adjusted according to the required magnification, and that as the number of support members 41 increases, the greater the displacement magnification, the better the energy consumption. As shown in fig. 1, the steel strand 42 is inserted back and forth between the upper and lower supports 41 6 times, and the displacement is amplified 6 times.
The response after amplification of the self-resetting vibration damper for amplifying damping energy consumption can be calculated by the following formula:
x d ＝n×x (1)
wherein x is d Is the input response (displacement, velocity and acceleration) of the damper; x is the distance of movement between the upper and lower supports; n is the number of reciprocal interpenetration of the steel strand between the upper and lower supporting members.
However, the number of the supporting members 41 is specifically determined according to the diameter of the column 1 and the maximum pull-out distance of the piston rod 311 of the self-resetting damper 3, the displacement amplified by the displacement amplifying device cannot exceed the maximum pull-out distance of the piston rod 311, in addition, friction exists between the supporting members 41 and the steel strands 42, and the excessive supporting members 41 can affect the energy consumption of the self-resetting damper 3.
In a preferred embodiment of the present invention, the self-resetting damper 3 includes a damper 31 and an elastic member 32, wherein the damper 31 is for providing a movement resistance, and the elastic member 32 is for self-resetting of the damper 31. Specifically, one end of the elastic member 32 is connected with a piston rod 311 of the damper 31, the other end is connected with a cylinder body 312 of the damper 31, the cylinder body 312 is connected to the column 1 or the foundation 2, and the piston rod 311 is connected with the other end of the steel strand 42; under the action of external force (such as the swinging action of the column 1), the piston rod 311 moves relative to the cylinder 312, and the elastic piece 32 deforms; when no external force is applied, the piston rod 311 is restored along with the restoration of the elastic deformation of the elastic member 32. It should be noted that the restoring force of the elastic member 32 is greater than the damping force of the damper 31, and the self-restoring force of the elastic member 32 is used to realize self-restoring, and the self-restoring capability of the whole device is related to the stiffness coefficient of the elastic member.
The damper of the present embodiment may employ a viscous damper, a friction damper, an inertial (mass) damper, a negative stiffness damper, or the like.
In the embodiment of the invention, the damper 31 comprises a piston rod 311 and a cylinder 312, the elastic piece 32 is a spring, the spring is integrally sleeved outside the damper 31, one end of the spring is connected with the piston rod 311, and the other end of the spring is connected with the cylinder 312. The parallel arrangement mode of the spring and the damper 31 realizes the self-resetting function of the device on one hand and improves the structural toughness; on the other hand, the structure of the existing damper is slightly changed, and the manufacturing cost is reduced.
In some specific examples of the present invention, the elastic member 32 may employ a coil spring or a rubber spring.
In other embodiments of the present invention, the elastic member 32 may be disposed in other manners, such as inside the piston rod 311.
Of course, other commercially available dampers having both damper function and self-resetting function may be used as the self-resetting damper 3.
It will be appreciated that in the embodiment of the present invention, for convenience of processing, a first connector 313 is connected to the piston rod 311 of the existing damper, a second connector 314 is connected to the cylinder 312, a spring is sleeved on the damper 31, one end of the spring is fixed to the first connector 313, and the other end of the spring is fixed to the second connector 314, as shown in fig. 7. Meanwhile, the first connection head 313 is connected with the steel strand 42, the second connection head 314 is connected with the hinged support 5 or the column 1 or the foundation 2, specifically, when the hinged support 5 is not arranged, the second connection head 314 is directly connected with the column 1 or the foundation 2, and when the hinged support 5 is arranged, the second connection head 314 is connected with the hinged support 5.
In the embodiment of the present invention, the first connection joint 313 is a plate body fixed to an end of the piston rod 311, and the second connection joint 314 is a T-shaped rod fixed to a bottom of the cylinder 312. When the second connector 314 is connected to the hinge support 5, the flange portion of the T-bar is disposed in a U-shaped piece that is connected to the hinge support 5.
In the embodiment of the present invention, the displacement amplifying device 4 may be disposed at the side where the self-resetting damper 3 is reset, and the displacement amplifying device 4 may be disposed symmetrically with respect to the self-resetting damper 3. Preferably, the displacement amplifying device 4 is symmetrical with the self-resetting damper 3 as a center, so that the energy consumption stability is improved.
In another embodiment of the present invention, a self-resetting swing structure is disclosed, and referring to fig. 3, the self-resetting swing structure includes a column 1, a base 2, and the self-resetting vibration damper for amplifying damping energy consumption described in the above embodiment.
In the specific embodiment of the invention, the column connecting piece 6 is connected to the column 1 through welding or bolts, the bottom surface of the column connecting piece 6 is provided with a plurality of supporting pieces 41 in parallel, the foundation 2 is also provided with a plurality of supporting pieces 41 in parallel, the supporting pieces 41 on the column connecting piece 6 and the supporting pieces 41 on the foundation 2 are sequentially arranged at intervals, and the supporting pieces 41 on the column connecting piece 6 and the supporting pieces 41 on the foundation 2 are on the same vertical surface, so that after the steel stranded wires 42 are connected with the supporting pieces 41, the steel stranded wires 42 are in the vertical direction and parallel to the side surface of the column 1.
A diagram of the vibration damping effect after the self-resetting vibration damping device for amplifying damping energy consumption according to the embodiment of the invention is provided is shown in fig. 9. In fig. 9, the abscissa is time, and the ordinate is rotation angle, which represents a process schematic of the rotation angle continuously decaying with time under the condition of free vibration of the column. FIG. 9 shows the effect of an uncontrolled swing column, no support, magnification of 2, 4, 6, respectively, where uncontrolled swing column refers to column only; the support-free means that only two steel strands are arranged on the side of the column body to drive the damper, and no support is arranged. In the simulation test, the cross section of the column body 1 is rectangular, and when the supporting piece 41 is arranged, the four side faces of the column body 1 are all provided with self-resetting vibration reduction devices for amplifying damping energy consumption. As can be seen from fig. 9, the vibration damping effect is obviously improved after the self-resetting vibration damping device for amplifying damping energy consumption is arranged, and the structural response effect is gradually reduced with the increase of the number of the supporting pieces (namely, the increase of the amplification factor).
The energy consumption and the self-resetting process of the self-resetting swing structure of the present embodiment are described below with reference to fig. 4 to 6:
as shown in fig. 4 to 6, the working process of the self-resetting vibration damper for amplifying damping energy consumption is approximately from an initial state to a working state, from the working state to a recovery state, and finally back to the initial state, so that the working process is taken as a working period. Since the self-resetting vibration damper for amplifying the damping energy consumption is symmetrically arranged at both sides of the column 1 in the same structure, the working process will be described by taking the self-resetting vibration damper for amplifying the damping energy consumption at one side as an example.
Firstly, under the action of earthquake load, the joint of the column 1 and the foundation 2 is continuously lifted and closed, the column 1 continuously swings, the column 1 continuously inclines to a vibration reduction system at the other side in the process of amplifying the damping energy consumption from an initial state to a working state, and under the traction of a column connecting piece 6 on the column 1, a lower supporting piece 41 and a self-restoring damper 3 generate a corner along with the column 1 under the action of a hinged support 5, so that a steel stranded wire 42 is always vertical to the bottom surface of the column connecting piece 6 during the process. At this time, the steel strands 42 output the amplified displacement to the self-resetting damper 3 through the steel strands 42 and pull the piston rod 311 to move upward under the pulling of the upper and lower supporters 41, so that the damper 31 starts the energy-consuming operation in a state as shown in fig. 5, in which an arrow indicates the movement direction of the piston rod 311. Then, in the process of the self-resetting vibration damper for amplifying damping energy consumption of the present side from the working state to the recovery state, the column 1 starts to incline continuously toward the self-resetting vibration damper for amplifying damping energy consumption of the present side, the hinge joint of the lower support 41 and the bottom end of the damper 31 generates a corner, the distance between the upper support 41 and the lower support 41 is reduced continuously, the steel strand 42 starts to relax continuously, and the elastic member 32 starts to retract continuously. Meanwhile, the piston rod 311 of the damper 31 is gradually pulled back to the initial position under the restoring force of the elastic member 32, as shown in fig. 6, the self-resetting vibration damper of the present side, which amplifies damping energy consumption, also returns to the initial state; the self-resetting vibration damper for amplifying damping energy consumption finishes one period of work and starts to work in the next period.
In the embodiment of the present invention, the self-resetting vibration damper for amplifying damping energy consumption may be disposed at two opposite surfaces of the cylinder 1, or may be disposed circumferentially around the cylinder 1. The cross section of the column body 1 can be rectangular, circular or other common shapes, if the cross section of the column body 1 is rectangular, the damping energy consumption amplifying self-resetting vibration damper is arranged on four sides of the column body 1, and if the cross section of the column body 1 is circular, three damping energy consumption amplifying self-resetting vibration dampers are generally arranged.
In the embodiment of the present invention, the column 1 includes, but is not limited to, a swing column, and may also be other structures with relatively large volumes, such as a bridge pier, a wall, a fan, etc.
In the embodiment of the present invention, a stopper 7 is provided around the column 1, and as shown in fig. 2, the stopper 7 is fixed to the base 2 to prevent the column 1 from swinging too much in rotation angle.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A self-resetting vibration damper for amplifying damping energy consumption, comprising:
the self-resetting damper (3), the self-resetting damper (3) can provide motion resistance and has a self-resetting function, and one end of the self-resetting damper (3) is arranged on the column (1) or the foundation (2);
a displacement amplifying device (4), the displacement amplifying device (4) comprising: two groups of support element units and steel strands (42), wherein one group of support element units is arranged on the column body (1), the other group of support element units is arranged on the foundation (2), and each group of support element units comprises a plurality of support elements (41) which are arranged at intervals in sequence; the steel stranded wires (42) are sequentially wound on the supporting piece (41) of the column body (1) and the supporting piece (41) of the foundation (2), one end of each steel stranded wire (42) is connected with the foundation (2) or the column body (1), and the other end of each steel stranded wire (42) is connected with the other end of the self-resetting damper (3); -said strands (42) being movable with respect to said support (41);
the support piece (41) comprises a support seat (411) and a bearing part (412) arranged on the support seat (411) and used for bearing the steel stranded wires (42), wherein the steel stranded wires (42) are in rolling contact or sliding contact with the bearing part (412), and the support seat (411) is connected to the column body (1) or the foundation (2).
2. The self-resetting vibration damper for amplifying damping energy consumption according to claim 1, wherein the bearing part (412) is a roller, a groove (413) is penetrated on the support (411), the roller is arranged in the groove (413), the roller can rotate in the groove (413), and the steel strand (42) is in contact with the roller.
3. Self-resetting vibration-damping device for amplifying damping energy consumption according to claim 1, characterized in that the support (41) has a degree of freedom in the direction of oscillation of the column (1).
4. A self-resetting vibration-damping device for amplifying damping energy consumption according to claim 3, characterised in that the support (41) is movably connected with the column (1) or/and the support (41) is movably connected with the foundation (2).
5. The self-resetting vibration damping device for amplifying damping energy consumption according to claim 4, wherein a hinged support (5) is arranged between the support (41) and the column (1) or/and a hinged support (5) is arranged between the support (41) and the foundation (2).
6. The self-resetting vibration damper device for amplifying damping energy consumption according to claim 1, wherein the self-resetting vibration damper (3) comprises a damper (31) and an elastic member (32), one end of the elastic member (32) is connected with a piston rod (311) of the damper (31), the other end of the elastic member (32) is connected with a cylinder (312) of the damper (31), the cylinder (312) is connected on the foundation (2), and the piston rod (311) is connected with the other end of the steel strand (42); under the external acting force, the piston rod (311) moves relative to the cylinder body (312), the elastic piece (32) deforms, and when no external acting force exists, the piston rod (311) resets along with the recovery of the elastic deformation of the elastic piece (32).
7. The self-resetting vibration damping device for amplifying damping energy consumption according to claim 6, wherein the damper (31) comprises a piston rod (311) and a cylinder body (312), the elastic piece (32) is a spring, the spring is sleeved outside the damper (31), one end of the spring is connected with the piston rod (311), and the other end of the spring is connected with the cylinder body (312).
8. The self-resetting vibration damping device for amplifying damping energy consumption according to any one of claims 1-7, further comprising a column connecting piece (6), wherein the column connecting piece (6) is arranged on the column (1), and wherein the supporting piece (41) is arranged on the column connecting piece (6).
9. The self-resetting vibration damping device for amplifying damping energy consumption according to any one of claims 1-7, wherein the displacement amplifying device (4) is arranged symmetrically with the self-resetting damper (3) as a center.
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