CN211549025U - Positive negative stiffness isolation bearing of self-adaptation - Google Patents
Positive negative stiffness isolation bearing of self-adaptation Download PDFInfo
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- CN211549025U CN211549025U CN202020050968.6U CN202020050968U CN211549025U CN 211549025 U CN211549025 U CN 211549025U CN 202020050968 U CN202020050968 U CN 202020050968U CN 211549025 U CN211549025 U CN 211549025U
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Abstract
The utility model discloses a self-adaptive positive and negative rigidity shock insulation support, which comprises a lower support plate, a joint sliding block and an upper support plate, wherein the upper support plate, the joint sliding plate and the lower support plate are respectively positioned above, in the middle and below the shock insulation support, and the joint sliding block is positioned between the upper support plate and the joint sliding plate; the joint sliding plate slides in the lower support plate, the joint sliding block slides in the upper support plate, and the joint sliding plate and the joint sliding block rotate relatively. The utility model discloses an adjustment support parameter can be for the additional negative stiffness of shock insulation layer when well middle and small shake, can carry out the rational design cooperation with ordinary shock insulation support for the additional positive stiffness of shock insulation layer when big shake, makes whole shock insulation layer show the required rigidity that compares conventional shock insulation layer littleer or bigger under the condition of different demands, reaches ideal shock insulation effect.
Description
Technical Field
The utility model belongs to the technical field of building and bridge shock insulation, involve the isolation bearing, concretely relates to positive negative rigidity isolation bearing of self-adaptation.
Background
The seismic isolation technology is one of the most effective measures for reducing the damage of an earthquake to a structure, and the basic idea is to arrange a flexible seismic isolation layer with enough reliability between a foundation and an upper structure so as to prolong the self-vibration period of the structure and increase damping to reduce the transmission of earthquake energy to the upper structure. The seismic isolation support technology is tested and theoretically demonstrated at present, and has outstanding seismic resistance and economical efficiency.
The main problems and drawbacks of the prior art are as follows:
at present, the seismic isolation technology still has some problems to be solved: (1) the long-period structure has poor shock insulation effect. Researches show that when the natural vibration period of the vibration isolation structure is more than 2 times of that of a non-vibration isolation structure, a better vibration isolation effect can be obtained, and for a long-period structure, a vibration isolation layer with lower horizontal rigidity needs to be designed, but it is difficult to produce a qualified low-shear-rigidity vibration isolation rubber support, the main reasons are that the rubber shear modulus cannot be too low and the rubber layer thickness cannot be too large, theories and tests show that the low-modulus support with too large total rubber thickness has low bearing capacity and poor stability, S-type or C-type deformation easily occurs, and therefore the low-level rigidity of the vibration isolation layer of the rubber support is difficult to realize. (2) And controlling the displacement during the major earthquake. In consideration of the shock insulation effect during medium and small shocks, the rigidity of the shock insulation support is insufficient for displacement control during large shocks, so that the phenomenon of overlarge displacement of a shock insulation layer can occur during large shocks.
Therefore, on one hand, when the structure experiences middle and small earthquakes or the structure period is longer, the requirement that the rigidity of the shock insulation layer is smaller than that of the conventional shock insulation layer is provided by the shock insulation layer from the shock insulation effect, and on the other hand, when the structure experiences large earthquakes, the requirement that the rigidity of the shock insulation layer is larger than that of the conventional shock insulation layer is provided by the shock insulation layer from the shock insulation displacement control. Correspondingly, the self-adaptive shock insulation support capable of adding negative rigidity to the shock insulation layer during medium and small shocks and adding positive rigidity to the shock insulation layer during large shocks has been developed in the field, so that ideal shock insulation requirements can be met.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem and the defect that exist among the prior art, the utility model provides a positive negative stiffness isolation bearing of self-adaptation through adjustment support parameter, can be for the additional negative stiffness of shock insulation layer when middle and small shake, can be for the additional positive stiffness of shock insulation layer when big shake, carries out rational design cooperation with ordinary shock insulation support and uses, makes whole shock insulation layer show the required rigidity that compares conventional shock insulation layer littleer or bigger under the condition of different demands, reaches ideal shock insulation effect.
Therefore, the utility model adopts the following technical scheme:
a self-adaptive positive and negative stiffness shock insulation support comprises a lower support plate, a joint sliding block and an upper support plate, wherein the upper support plate, the joint sliding plate and the lower support plate are respectively positioned above, in the middle and below the shock insulation support, and the joint sliding block is positioned between the upper support plate and the joint sliding plate; the joint sliding plate slides in the lower support plate, the joint sliding block slides in the upper support plate, and the joint sliding plate and the joint sliding block rotate relatively.
Preferably, a first sliding curved surface is arranged on the upward side of the lower support plate, and the first sliding curved surface is a convex curved surface on the lower support plate; one end of the joint sliding plate, which is close to the lower support plate, is provided with a second sliding curved surface, and the second sliding curved surface is a curved surface with the joint sliding plate facing downwards; the first sliding curved surface and the second sliding curved surface form a first sliding friction pair; a third sliding curved surface is arranged on the upward side of the joint sliding plate, and the third sliding curved surface is a curved surface of the joint sliding plate, which is upward; a fourth sliding curved surface is arranged at one end, close to the joint sliding plate, of the joint sliding block, and the fourth sliding curved surface is a curved surface with the joint sliding block facing downwards; the third sliding curved surface and the fourth sliding curved surface form a first rotating friction pair; a fifth sliding curved surface is arranged on the upward side of the joint sliding block, and the fifth sliding curved surface is a curved surface with the joint sliding block upward; a sixth sliding curved surface is arranged at one end, close to the joint sliding block, of the upper support plate, and the sixth sliding curved surface is a curved surface with the upper support plate facing downwards; the fifth sliding curved surface and the sixth sliding curved surface form a second sliding friction pair.
Preferably, the lower support plate comprises a first base and a first mirror surface stainless steel plate, the first mirror surface stainless steel plate is arranged at one end, close to the joint sliding plate, of the first base, and the first sliding curved surface is a mirror surface of the first mirror surface stainless steel plate; the upper bracket board comprises a second base and a second mirror surface stainless steel plate, the second mirror surface stainless steel plate is arranged at one end, close to the joint sliding block, of the second base, and the sixth sliding curved surface is a mirror surface of the second mirror surface stainless steel plate.
Preferably, the edge of lower support plate is equipped with first spacing basin ring, the edge of upper bracket board is equipped with the spacing basin ring of second, is used for the displacement of restriction joint slide and joint slider respectively.
Preferably, the joint sliding plate comprises a sliding plate main body, a lower sliding plate and a first upper sliding plate, the lower sliding plate is positioned at one end of the sliding plate main body close to the lower support plate, and the second sliding curved surface is arranged on the lower sliding plate; the first upper sliding plate is positioned at one end of the sliding plate main body close to the joint sliding block, and the third sliding curved surface is arranged on the first upper sliding plate; the joint sliding block comprises a sliding block main body and a second upper sliding plate, the second upper sliding plate is located at one end, close to the upper supporting plate, of the sliding block main body, and the fifth sliding curved surface is arranged on the second upper sliding plate.
Preferably, the first sliding curved surface curvature radius is larger than the sixth sliding curved surface curvature radius, and the sixth sliding curved surface curvature radius is larger than the third sliding curved surface curvature radius.
Preferably, the first sliding curved surface friction coefficient is smaller than the sixth sliding curved surface, and the curvature radius of the first sliding curved surface, the third sliding curved surface and the sixth sliding curved surface is related to the sliding surface friction coefficient. By adjusting the curvature radius and the friction coefficient, the additional negative stiffness and the additional positive stiffness of the support can be adjusted, and different design requirements are met.
Preferably, when the joint sliding plate slides in the lower support plate, the support presents an additional negative rigidity characteristic along with the increase of the relative displacement; when the joint sliding block slides in the upper support plate, the support presents an additional positive stiffness characteristic along with the increase of relative displacement.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses different with traditional shock insulation support, though adopt the simplest passive control theory, but this support has the adaptivity, and the different demands on shock insulation layer show different rigidity characteristic when can stand the earthquake.
(2) The utility model discloses shock insulation support's rigidity is along with shock insulation layer demand change, has two kinds of characteristics of additional negative stiffness and additional positive stiffness, and the size accessible of rigidity added value is to sliding surface curvature radius and coefficient of friction's design adjustment.
(3) The utility model discloses isolation bearing simple structure just benefits from the innovation of control strategy, stability is good, the sexual valence relative altitude when having the adaptability to the earthquake.
Drawings
Fig. 1 is a schematic structural diagram of a self-adaptive positive and negative stiffness seismic isolation support provided by the utility model.
Fig. 2 is a schematic structural diagram of a first adaptive positive-negative stiffness seismic isolation support provided by the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a seismic isolation bearing with adaptive positive and negative stiffness according to a second embodiment of the present invention.
Description of reference numerals: 1. a lower support plate; 2. a joint sliding plate; 3. a joint slider; 4. an upper support plate; 11. a first base; 12. a first limit basin ring; 21. a skateboard body; 22. a lower sliding plate; 23. a first upper sliding plate; 31. a slider body; 32. a second upper sliding plate; 41. a second base; 42. a second limiting basin ring; 101. a first sliding curved surface; 201. a second sliding curved surface; 202. a third sliding curved surface; 301. a fourth sliding curved surface; 302. a fifth sliding curved surface; 401. and a sixth sliding curved surface.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are only used for explaining the present invention, but not for limiting the present invention.
As shown in fig. 1, the utility model discloses a self-adaptive positive and negative stiffness vibration isolation support, which comprises a lower support plate 1, a joint sliding plate 2, a joint slider 3 and an upper support plate 4, wherein the upper support plate 4, the joint sliding plate 2 and the lower support plate 1 are respectively positioned above, in the middle and below the vibration isolation support, and the joint slider 3 is positioned between the upper support plate 4 and the joint sliding plate 2; the joint sliding plate 2 slides in the lower support plate 1, the joint sliding block 3 slides in the upper support plate 4, and the joint sliding plate 2 and the joint sliding block 3 rotate relatively.
Specifically, a first sliding curved surface 101 is arranged on the upward side of the lower support plate 1, and the first sliding curved surface 101 is a convex curved surface on the lower support plate 1; one end of the joint sliding plate 2, which is close to the lower support plate 1, is provided with a second sliding curved surface 201, and the second sliding curved surface 201 is a downward curved surface of the joint sliding plate 2; the first sliding curved surface 101 and the second sliding curved surface 201 form a first sliding friction pair; a third sliding curved surface 202 is arranged on the upward side of the joint sliding plate 2, and the third sliding curved surface 202 is a curved surface of the joint sliding plate 2 which faces upward; a fourth sliding curved surface 301 is arranged at one end, close to the joint sliding plate 2, of the joint sliding block 3, and the fourth sliding curved surface 301 is a downward curved surface of the joint sliding block 3; the third sliding curved surface 202 and the fourth sliding curved surface 301 form a first rotating friction pair; a fifth sliding curved surface 302 is arranged on the upward side of the joint sliding block 3, and the fifth sliding curved surface 302 is a curved surface of the joint sliding block 3 upward; a sixth sliding curved surface 401 is arranged at one end, close to the joint sliding block 3, of the upper support plate 4, and the sixth sliding curved surface 401 is a downward curved surface of the upper support plate 4; the fifth sliding curved surface 302 and the sixth sliding curved surface 401 form a second sliding friction pair.
Specifically, the lower support plate 1 comprises a first base 11 and a first mirror surface stainless steel plate, the first mirror surface stainless steel plate is arranged at one end of the first base 11 close to the joint sliding plate 2, and the first sliding curved surface 101 is a mirror surface of the first mirror surface stainless steel plate; the upper bracket plate 4 includes a second base 41 and a second mirror surface stainless steel plate, the second mirror surface stainless steel plate is disposed at one end of the second base 41 close to the joint slider 3, and the sixth sliding curved surface 401 is a mirror surface of the second mirror surface stainless steel plate.
Specifically, the edge of the lower support plate 1 is provided with a first limit basin ring 12, and the edge of the upper support plate 4 is provided with a second limit basin ring 42, which are respectively used for limiting the displacement of the joint sliding plate 2 and the joint sliding block 3.
Specifically, the joint sliding plate 2 includes a sliding plate main body 21, a lower sliding plate 22 and a first upper sliding plate 23, the lower sliding plate 22 is located at one end of the sliding plate main body 21 close to the lower support plate 1, and the second sliding curved surface 201 is provided on the lower sliding plate 22; the first upper sliding plate 23 is positioned at one end of the sliding plate main body 21 close to the joint sliding block 3, and the third sliding curved surface 202 is arranged on the first upper sliding plate 23; the joint slider 3 includes a slider main body 31 and a second upper slide plate 32, the second upper slide plate 32 is located at one end of the slider main body 31 close to the upper support plate 4, and the fifth sliding curved surface 302 is provided on the second upper slide plate 32. The sliding plates may be PTFE plates, MHP plates or SF-1 plates.
Specifically, the curvature radius of the first sliding curved surface 101 is larger than that of the sixth sliding curved surface 401, and the curvature radius of the sixth sliding curved surface 401 is larger than that of the third sliding curved surface 202.
The friction coefficient of the first sliding curved surface 101 is smaller than that of the sixth sliding curved surface 401, and the curvature radii of the first sliding curved surface 101, the third sliding curved surface 202 and the sixth sliding curved surface 401 are related to the friction coefficient of the sliding surface. By adjusting the curvature radius and the friction coefficient, the additional negative stiffness and the additional positive stiffness of the support can be adjusted, and different design requirements are met.
When the joint sliding plate 2 slides in the lower support plate 1, the support presents additional negative stiffness characteristic along with the increase of relative displacement; when the joint sliding block 3 slides in the upper support plate 4, the support presents an additional positive rigidity characteristic along with the increase of relative displacement.
Example one
As shown in fig. 2, the utility model provides a positive negative rigidity isolation bearing of self-adaptation, include bottom suspension bedplate 1, joint slide 2, upper bracket board 4 and set up joint slider 3 between joint slide 2 and upper bracket board 4, joint slider 3 includes slide main part 31 and second upper sliding plate 32, wherein:
the lower support plate 1, the joint sliding plate 2, the upper support plate 4 and the joint sliding block 3 all adopt Q345 steel,the lower slide plate 22, the first upper slide plate 23, and the second upper slide plate 32 are made of a low-friction material, and PTFE (polytetrafluoroethylene) is used in the present embodiment; the sliding curved surfaces are all arc curved surfaces, and the curvature radiuses of the arc curved surfaces forming the friction pairs are the same. The radius of curvature of the first sliding surface 101 of this embodiment is R12500mm, coefficient of friction, mu10.03 percent; the third sliding curved surface 202 has a radius of curvature R2350mm, coefficient of friction μ20.04; the sixth sliding curved surface 401 has a radius of curvature of R31000mm, coefficient of friction μ3＝0.08。
Example two
FIG. 3 is a schematic structural diagram of the second embodiment; the difference with the first embodiment is that the first rotating friction pair and the first sliding friction pair exchange positions to form the self-adaptive positive and negative stiffness vibration isolation support which has the same principle as the first embodiment but has a different structure.
When the self-adaptive positive and negative rigidity shock isolation support is actually used, the self-adaptive positive and negative rigidity shock isolation support is combined with the conventional common rubber shock isolation support to form a self-adaptive positive and negative rigidity hybrid shock isolation system, namely, the self-adaptive positive and negative rigidity shock isolation support is installed below the building part support, and the common rubber shock isolation support is installed on the rest building support. When the displacement of the shock insulation layer is smaller than the threshold value, negative stiffness is added to the shock insulation layer, and the negative stiffness and the positive stiffness are superposed to reduce the stiffness of the original shock insulation layer, so that a more excellent shock insulation effect is obtained; when the displacement of the shock insulation layer exceeds the threshold value, the positive stiffness is added, the positive stiffness and the negative stiffness are superposed to increase the stiffness of the original shock insulation layer, the displacement of the shock insulation layer is effectively controlled, and the safety of the shock insulation layer and the structure is ensured.
The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle scope of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. The utility model provides a positive negative rigidity isolation bearing of self-adaptation, includes bottom suspension bedplate (1), joint slide (2), joint slider (3) and upper bracket board (4), its characterized in that: the upper support plate (4), the joint sliding plate (2) and the lower support plate (1) are respectively positioned above, in the middle and below the shock insulation support, and the joint sliding block (3) is positioned between the upper support plate (4) and the joint sliding plate (2); the joint sliding plate (2) slides in the lower support plate (1), the joint sliding block (3) slides in the upper support plate (4), and the joint sliding plate (2) and the joint sliding block (3) rotate relatively.
2. The self-adaptive positive and negative stiffness seismic isolation bearing according to claim 1, wherein: a first sliding curved surface (101) is arranged on the upward side of the lower support plate (1), and the first sliding curved surface (101) is a convex curved surface on the lower support plate (1); one end of the joint sliding plate (2) close to the lower support plate (1) is provided with a second sliding curved surface (201), and the second sliding curved surface (201) is a downward curved surface of the joint sliding plate (2); the first sliding curved surface (101) and the second sliding curved surface (201) form a first sliding friction pair; a third sliding curved surface (202) is arranged on the upward side of the joint sliding plate (2), and the third sliding curved surface (202) is a curved surface of the joint sliding plate (2) which is upward; a fourth sliding curved surface (301) is arranged at one end, close to the joint sliding plate (2), of the joint sliding block (3), and the fourth sliding curved surface (301) is a downward curved surface of the joint sliding block (3); the third sliding curved surface (202) and the fourth sliding curved surface (301) form a first rotating friction pair; a fifth sliding curved surface (302) is arranged on the upward side of the joint sliding block (3), and the fifth sliding curved surface (302) is a curved surface of the joint sliding block (3) upward; a sixth sliding curved surface (401) is arranged at one end, close to the joint sliding block (3), of the upper support plate (4), and the sixth sliding curved surface (401) is a curved surface of the upper support plate (4) facing downwards; the fifth sliding curved surface (302) and the sixth sliding curved surface (401) form a second sliding friction pair.
3. The self-adaptive positive and negative stiffness seismic isolation bearing according to claim 2, wherein: the lower support plate (1) comprises a first base (11) and a first mirror surface stainless steel plate, the first mirror surface stainless steel plate is arranged at one end, close to the joint sliding plate (2), of the first base (11), and the first sliding curved surface (101) is a mirror surface of the first mirror surface stainless steel plate; the upper bracket plate (4) comprises a second base (41) and a second mirror surface stainless steel plate, the second mirror surface stainless steel plate is arranged at one end, close to the joint sliding block (3), of the second base (41), and the sixth sliding curved surface (401) is a mirror surface of the second mirror surface stainless steel plate.
4. The self-adaptive positive and negative stiffness seismic isolation bearing according to claim 3, wherein: the edge of bottom suspension bedplate (1) is equipped with first spacing basin ring (12), the edge of upper bracket board (4) is equipped with second spacing basin ring (42), is used for the displacement of restriction joint slide (2) and joint slider (3) respectively.
5. The self-adaptive positive and negative stiffness seismic isolation bearing according to claim 2, wherein: the joint sliding plate (2) comprises a sliding plate main body (21), a lower sliding plate (22) and a first upper sliding plate (23), the lower sliding plate (22) is located at one end, close to the lower support plate (1), of the sliding plate main body (21), and the second sliding curved surface (201) is arranged on the lower sliding plate (22); the first upper sliding plate (23) is positioned at one end of the sliding plate main body (21) close to the joint sliding block (3), and the third sliding curved surface (202) is arranged on the first upper sliding plate (23); the joint sliding block (3) comprises a sliding block main body (31) and a second upper sliding plate (32), the second upper sliding plate (32) is located at one end, close to the upper supporting plate (4), of the sliding block main body (31), and a fifth sliding curved surface (302) is arranged on the second upper sliding plate (32).
6. The self-adaptive positive and negative stiffness seismic isolation bearing according to claim 2, wherein: the curvature radius of the first sliding curved surface (101) is larger than that of the sixth sliding curved surface (401), and the curvature radius of the sixth sliding curved surface (401) is larger than that of the third sliding curved surface (202).
7. The self-adaptive positive and negative stiffness seismic isolation bearing according to claim 2, wherein: the friction coefficient of the first sliding curved surface (101) is smaller than that of the sixth sliding curved surface (401), and the curvature radiuses of the first sliding curved surface (101), the third sliding curved surface (202) and the sixth sliding curved surface (401) are related to the friction coefficient of the sliding surface.
8. An adaptive positive and negative stiffness seismic isolation bearing as claimed in any one of claims 1 to 7, wherein: when the joint sliding plate (2) slides in the lower support plate (1), the support presents additional negative rigidity along with the increase of relative displacement; when the joint sliding block (3) slides in the upper support plate (4), the support presents an additional positive rigidity characteristic along with the increase of relative displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020050968.6U CN211549025U (en) | 2020-01-10 | 2020-01-10 | Positive negative stiffness isolation bearing of self-adaptation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020050968.6U CN211549025U (en) | 2020-01-10 | 2020-01-10 | Positive negative stiffness isolation bearing of self-adaptation |
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| Publication Number | Publication Date |
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| CN211549025U true CN211549025U (en) | 2020-09-22 |
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| CN202020050968.6U Active CN211549025U (en) | 2020-01-10 | 2020-01-10 | Positive negative stiffness isolation bearing of self-adaptation |
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| CN (1) | CN211549025U (en) |
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- 2020-01-10 CN CN202020050968.6U patent/CN211549025U/en active Active
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