CN218521991U - Variable-rigidity self-resetting shock insulation support - Google Patents
Variable-rigidity self-resetting shock insulation support Download PDFInfo
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- CN218521991U CN218521991U CN202222020644.XU CN202222020644U CN218521991U CN 218521991 U CN218521991 U CN 218521991U CN 202222020644 U CN202222020644 U CN 202222020644U CN 218521991 U CN218521991 U CN 218521991U
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- sma
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- sma rod
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- 230000035939 shock Effects 0.000 title abstract description 34
- 238000009413 insulation Methods 0.000 title abstract description 24
- 229920001971 elastomer Polymers 0.000 claims abstract description 37
- 238000002955 isolation Methods 0.000 claims abstract description 32
- 244000043261 Hevea brasiliensis Species 0.000 claims description 3
- 229920003052 natural elastomer Polymers 0.000 claims description 3
- 229920001194 natural rubber Polymers 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 4
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- 229910001285 shape-memory alloy Inorganic materials 0.000 description 78
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
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- 230000032683 aging Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
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- 239000002520 smart material Substances 0.000 description 1
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Abstract
The utility model discloses a become rigidity from restoring to throne isolation bearing, including upper junction plate, lower connecting plate and set up the stromatolite rubber between upper junction plate and lower connecting plate between two parties, encircle many SMA sticks of distribution around the stromatolite rubber. The utility model discloses a SMA stick distributes around stromatolite rubber as the attenuator, can exert SMA and the respective characteristic of two kinds of materials of rubber, for the shock insulation support provides extra restoring force when lightening seismic action for building structure, makes the structure can get back to initial position under great seismic action. In addition, the SMA rod does not enter a working state under medium and small earthquakes, and can ensure that the rigidity of the shock insulation layer is smaller under the small earthquakes, thereby reducing the earthquake response of the upper structure; under heavy earthquake, the rubber shock insulation layer has higher rigidity than the traditional rubber shock insulation layer, effectively limits horizontal displacement, and has very good practical value and application prospect.
Description
Technical Field
The utility model relates to an antidetonation technique specifically is a become rigidity from restoring to throne isolation bearing.
Background
Earthquake is a difficult problem faced by human from ancient times to present, and not only causes huge property loss, but also brings serious life risk to people. Therefore, earthquake resistance is a protective lesson which the building field must do. The traditional anti-seismic mode is to adopt an anti-seismic structure to carry out hard resistance, namely, the self plastic deformation of the anti-seismic structure is relied on to carry out seismic energy. The most obvious disadvantage of the earthquake-proof mode is that under the condition of heavy earthquake, the building structure generates large residual deformation, and the residual deformation is unrecoverable, so that the capability of the whole structure for resisting aftershock is seriously damaged, and the using function of the building is lost. Therefore, the post-earthquake recoverability, i.e., toughness, of the building has become a hot spot of research in the field of earthquake resistance.
The shock absorption and isolation technology is a shock absorption system which increases the self-oscillation period of the structure by using a shock isolation layer with lower rigidity, thereby reducing the response of the displacement and acceleration of the upper structure of the building and further playing a good protection role in a main structure body and an auxiliary structure. The shock insulation support is a common shock insulation layer part, which enables an upper structure to keep an elastic state, and enables the upper structure to generate rigid translation during earthquake so as to reduce the influence of the upper structure on a lower structure.
Conventional seismically isolated mounts are rubber mounts which, while capable of dissipating some of the seismic capacity and providing some self-resetting capability, rubber is susceptible to aging affecting durability and which may be difficult to reset under major earthquakes due to excessive horizontal deformation. In order to solve the problem, scholars at home and abroad develop a self-resetting SMA support, and the resetting capability of the structure under large deformation is improved by utilizing shape memory alloy. Shape Memory Alloy (SMA) is a new smart material with shape memory effect and superelasticity, which has excellent elastic strain limit and recovery limit. The elastic strain of common metal is about 0.2%, while the allowable strain limit of SMA can reach 6% -8%, and the recoverable limit strain can reach 10%, which is 50 times that of common metal. And after the SMA generates large strain and is unloaded, almost no residual deformation exists, and a full hysteresis curve can be formed, so that the resetting capability of the structure under large deformation can be improved by utilizing the performance.
The prior SMA self-resetting support mostly adopts SMA wires and SMA stranded wires, for example, an SMA self-resetting seismic isolation support disclosed in Chinese patent document CN 11269676A is connected with a lower connecting plate through a dog bone-shaped SMA rod, the other end of the SMA self-resetting seismic isolation support is connected with a steel chain with a connecting block, the SMA rod and the steel chain are arranged on two sides of the support, two SMA rod and steel chain assemblies are arranged on each side, and the SMA rod and steel chain assemblies are distributed in an X-shaped cross mode on the whole to improve the seismic isolation effect of the structure and reduce the loss after the earthquake. The SMA wire is used at the turning point or corner of the support, and the SMA wire and the support turning device can generate friction and extrusion, so that the SMA wire is easy to damage; the SMA stranded wire has the condition of complex manufacturing process, and the SMA wire and the SMA stranded wire are both parts with smaller diameter specifications, so that the buffer strain is redundant, the rigidity is limited, the performance is not stable enough, the rigidity is small enough in small earthquake, the structure can be better protected, but the toughness is not enough in large earthquake, overlarge horizontal deformation is easy to occur, and the protection effect on the component is not good.
Therefore, how to design a shock mount with good toughness ensures that the rigidity is small enough when a small earthquake occurs, and can avoid overlarge horizontal deformation under a large earthquake, thereby improving the protection and recovery performance of the building structure.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems of the existing SMA self-resetting support, and aiming at realizing the design of the shock absorption support with good toughness, the rigidity is small enough when the shock is small, the overlarge horizontal deformation can be avoided under the large shock, and the protection and recovery performance of the building structure are improved. The specific technical scheme is as follows:
the variable-rigidity self-resetting seismic isolation support comprises an upper connecting plate, a lower connecting plate and laminated rubber arranged between the upper connecting plate and the lower connecting plate in the middle, wherein a plurality of SMA rods are distributed around the laminated rubber in a surrounding mode.
In the variable-rigidity self-resetting seismic isolation support, the upper connecting plate is provided with an SMA rod mounting hole, and the lower connecting plate is provided with an SMA rod limiting hole; the upper end of the SMA rod is fixedly arranged in the SMA rod mounting hole of the upper connecting plate, the lower end of the SMA rod is suspended in the SMA rod limiting hole on the lower connecting plate, and a certain distance is reserved between the SMA rod and the inner wall of the SMA rod limiting hole.
Preferably, the upper end of the SMA rod is provided with a thread, and the SMA rod is fixedly arranged in the SMA rod mounting hole of the upper connecting plate through the thread; the distance between the lower end of the SMA rod and the inner wall of the SMA rod limiting hole is 50 mm-100 mm.
Further preferably, the lower end of the SMA rod is strictly limited at the central position of the SMA rod limiting hole on the lower connecting plate.
According to the variable-rigidity self-resetting seismic isolation support, the laminated rubber is connected with the upper connecting plate and the lower connecting plate through the bolts.
In the variable-rigidity self-resetting seismic isolation support, the connecting plate and the lower connecting plate are respectively provided with the bolt holes for connecting with the building structures at the upper part and the lower part of the variable-rigidity self-resetting seismic isolation support.
Preferably, the laminated rubber is made of natural rubber.
Preferably, the number of the SMA rods is not less than 8, and the diameter of the SMA rods is 20 mm-30 mm.
The utility model has the advantages that:
1) The utility model discloses regard the SMA stick as the attenuator, rational arrangement forms SMA rubber support on the stromatolite rubber support, can exert the respective characteristic of two kinds of materials, and extension structure cycle, absorption input energy avoid the support to appear sliding or produce too big residual displacement to greatly reduced shakes the after loss.
2) The utility model discloses it is more simple and convenient that SMA stick and shock insulation support pass through threaded connection not only manufacturing process, and the SMA stick provides extra restoring force for shock insulation support when lightening seismic action for building structure, makes the structure get back to initial position under great seismic action, and the performance is also more stable than SMA silk and SMA stranded conductor.
3) The shock insulation support of the utility model has the advantages that under the medium and small earthquakes, the SMA rod does not enter the working state, only the rubber support enters the working state, the rigidity is small enough during the small earthquakes, and the earthquake response of the upper structure is reduced; under the heavy earthquake, the SMA rod enters into work, the rigidity of the shock insulation layer is increased, the horizontal displacement is effectively limited, the too large horizontal deformation of the shock insulation layer is avoided, the shock insulation layer is prevented from colliding or collapsing with an adjacent building, the shock insulation layer is favorable for being restored after the earthquake, and the SMA rod has good practical value and application prospect.
Drawings
FIG. 1 is a schematic structural view of the variable stiffness self-resetting seismic isolation bearing of the utility model;
FIG. 2 is a schematic side view of the variable stiffness self-resetting seismic isolation bearing of the present invention;
FIG. 3 is a schematic structural view of an upper connecting plate of the present invention;
FIG. 4 is a schematic view of the structure of the lower connecting plate of the present invention;
fig. 5 is a schematic structural diagram of the SMA rod of the present invention.
In the figure: 1. an upper connecting plate; 2. a lower connecting plate; 3. laminating rubber; 4. an SMA rod; 5. an SMA rod mounting hole; 6. an SMA rod limiting hole; 7. bolt holes.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the following embodiments and the accompanying drawings. It is to be understood that the described embodiment is merely one embodiment of the invention and is not intended to be a complete embodiment. All other embodiments obtained by those skilled in the art without any creative work based on the present embodiment belong to the protection scope of the present invention. The specific embodiment is as follows:
a variable-rigidity self-resetting seismic isolation support is shown in figures 1 to 5 and comprises an upper connecting plate 1, a lower connecting plate 2 and laminated rubber 3 arranged between the upper connecting plate 1 and the lower connecting plate 2 in the middle, wherein a plurality of SMA rods 4 are distributed around the laminated rubber 3 and are used as dampers, the SMA rods 4 are arranged on the laminated rubber support to form an SMA rubber support, so that two materials of SMA and rubber can exert respective characteristics, the toughness of the seismic isolation support is improved, the seismic isolation period of a seismic isolation support structure is prolonged, the seismic isolation support structure is increased to absorb input seismic energy, and the support is prevented from slipping or generating overlarge residual displacement, so that the loss after seismic is greatly reduced.
In the variable-stiffness self-resetting seismic isolation support, the upper connecting plate 1 is provided with an SMA rod mounting hole 5, and the lower connecting plate 2 is provided with an SMA rod limiting hole 6; the upper end of the SMA rod 4 is fixedly arranged in the SMA rod mounting hole 5 of the upper connecting plate 1, and preferably, the upper end of the SMA rod 4 is provided with threads which are fixedly arranged in the SMA rod mounting hole 5 of the upper connecting plate 1 through the threads. The lower end of the SMA rod 4 is suspended in an SMA rod limiting hole 6 on the lower connecting plate 2, and a certain distance is reserved between the SMA rod limiting hole and the inner wall (the periphery and the bottom surface) of the SMA rod limiting hole 6, and the distance is preferably 50-100 mm. The laminated rubber 3 is connected with the upper connecting plate 1 and the lower connecting plate 2 through bolts; the connecting plate and the lower connecting plate 2 are provided with bolt holes 7 for connecting with the building structure at the upper part and the lower part of the variable-rigidity self-resetting seismic isolation support
In a normal state, the good elasticity and the sufficient vertical rigidity of the laminated rubber support are fully exerted; under the medium and small earthquakes, the deformation in the horizontal direction is not large, only the laminated rubber enters into work, and the self-resetting capability is provided only by the laminated rubber, so that the shock insulation support has small enough rigidity, and the upper structure of the shock insulation support is effectively protected; under the action of a large earthquake, firstly, the laminated rubber support can obviously reduce the input of earthquake energy, the SMA rod limiting hole restrains the free motion of the lower end of the SMA rod, and the laminated rubber support and the SMA rod assembly work in a cooperative manner to provide good energy consumption capability and self-resetting capability and effectively reduce the damage of the earthquake to the upper main body structure; after the SMA rod works, the rigidity of the shock insulation layer is increased, the horizontal displacement under large shock is limited, and the collision with an adjacent building is avoided. Preferably, the lower end of the SMA rod 4 is limited at the central position of the SMA rod limiting hole 6 on the lower connecting plate 2 strictly, so as to provide an equivalent shock insulation and buffering space. The rubber material adopted by the laminated rubber is made of natural rubber added with an anti-aging agent. In order to ensure enough shock insulation and horizontal limiting capacity, the number of the SMA rods 4 distributed around the laminated rubber is not less than 8, and the diameter of each SMA rod is 20-30 mm.
The utility model discloses a many SMA sticks distribute around stromatolite rubber, can provide extra restoring force for shock insulation support when lightening seismic action for building structure, make the structure get back to initial position under great seismic action, for directly using SMA stick annular distribution, the utility model discloses it is more economical. In addition, the shock insulation support of the utility model, under medium and small shocks, the SMA rod does not enter the working state and can ensure that the rigidity of the shock insulation layer under the small shocks is smaller, thereby reducing the earthquake response of the upper structure; under the condition of heavy earthquake, the rubber shock insulation layer has higher rigidity than the traditional rubber shock insulation layer, effectively limits horizontal displacement and has very good practical value and application prospect.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a become rigidity from restoring to throne isolation bearing, includes upper junction plate (1), lower connecting plate (2) and sets up stromatolite rubber (3) between upper junction plate (1) and lower connecting plate (2) between two parties, its characterized in that: and a plurality of SMA rods (4) are circumferentially distributed around the laminated rubber (3).
2. The variable stiffness self-resetting seismic isolation mount of claim 1, wherein: the upper connecting plate (1) is provided with an SMA rod mounting hole (5), and the lower connecting plate (2) is provided with an SMA rod limiting hole (6); the upper end of the SMA rod (4) is fixedly installed in an SMA rod installation hole (5) of the upper connecting plate (1), the lower end of the SMA rod is suspended in an SMA rod limiting hole (6) of the lower connecting plate (2), and a certain distance is reserved between the SMA rod limiting hole and the inner wall of the SMA rod limiting hole (6).
3. The variable stiffness self-resetting seismic isolation mount of claim 2, wherein: the upper end of the SMA rod (4) is provided with a thread, and the SMA rod is fixedly arranged in an SMA rod mounting hole (5) of the upper connecting plate (1) through the thread; the distance between the lower end of the SMA rod (4) and the inner wall of the SMA rod limiting hole (6) is 50-100 mm.
4. The variable stiffness self-resetting seismic isolation mount of claim 3, wherein: the lower end of the SMA rod (4) is strictly limited at the central position of an SMA rod limiting hole (6) on the lower connecting plate (2).
5. The variable stiffness self-resetting seismic isolation bearing according to claim 1, characterized in that: the laminated rubber (3) is connected with the upper connecting plate (1) and the lower connecting plate (2) through bolts.
6. The variable stiffness self-resetting seismic isolation mount of claim 1, wherein: the connecting plate and the lower connecting plate (2) are both provided with bolt holes (7) for connecting with building structures on the upper and lower parts of the rigidity-variable self-resetting seismic isolation support.
7. The variable stiffness self-resetting seismic isolation mount of claim 1, wherein: the laminated rubber (3) is made of natural rubber.
8. The variable stiffness self-resetting seismic isolation bearing according to claim 1, characterized in that: the number of the SMA rods (4) is not less than 8.
9. The variable stiffness self-resetting seismic isolation bearing according to claim 8, wherein: the diameter specification of the SMA rod (4) is 20-30 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222020644.XU CN218521991U (en) | 2022-08-02 | 2022-08-02 | Variable-rigidity self-resetting shock insulation support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222020644.XU CN218521991U (en) | 2022-08-02 | 2022-08-02 | Variable-rigidity self-resetting shock insulation support |
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| CN218521991U true CN218521991U (en) | 2023-02-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117286965A (en) * | 2023-10-12 | 2023-12-26 | 华东交通大学 | Building shock insulation and absorption device capable of recovering original position |
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- 2022-08-02 CN CN202222020644.XU patent/CN218521991U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117286965A (en) * | 2023-10-12 | 2023-12-26 | 华东交通大学 | Building shock insulation and absorption device capable of recovering original position |
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Granted publication date: 20230224 |