CN109338875B - Friction damping support for bridge - Google Patents
Friction damping support for bridge Download PDFInfo
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- CN109338875B CN109338875B CN201811280459.6A CN201811280459A CN109338875B CN 109338875 B CN109338875 B CN 109338875B CN 201811280459 A CN201811280459 A CN 201811280459A CN 109338875 B CN109338875 B CN 109338875B
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- support column
- disc
- sliding
- bridge
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The application discloses a friction damping support of a bridge, which comprises a middle supporting part, an upper disc part, a lower disc part and a middle rotating part, wherein the upper disc part is connected with the lower disc part; the upper disc part and the lower disc part comprise an upper circumferential disc and a lower circumferential disc, the circle centers of the upper circumferential disc and the lower circumferential disc are coincided, and a sliding track groove is formed in the upper surface of the lower circumferential disc; the middle supporting part is positioned between the upper circumferential disc and the lower circumferential disc and is fixedly connected with the upper circumferential disc and the lower circumferential disc; the middle rotating part comprises a fixed support column, a sliding support column, a follow-up support column and a bridge contact surface, wherein rotating sleeves are arranged on the fixed support column, the sliding support column and the follow-up support column, and all the rotating sleeves are connected through connecting plates; the bridge contact surface is fixed at the bottom of the bridge deck, the follow-up support column is fixed on the bridge contact surface, the lower part of the fixed support column is fixed on the lower circumference disc, the sliding support column slides in the sliding track groove, and the fixed support column is used as the circle center to do circular motion. According to the application, the friction area is kept consistent by changing the friction direction, so that the support is prevented from being emptied.
Description
Technical Field
The application relates to the technical field of bridge supports, in particular to a friction damping support for a bridge.
Background
Bridge supports are a very important part of bridge structures. The bridge body of the bridge is not directly erected on the bridge pier. The support void is the most common damage phenomenon in bridge decks, and the support void refers to that gaps between the plate-type rubber support and the bottom surface of the bridge and the top surface of the supporting cushion stone are larger than 25% of corresponding side lengths. When the earthquake load is overlarge, the main beam and the support generate larger horizontal displacement, and the support is extremely easy to void at the moment, so that the beam falling phenomenon is generated. When the plate-type rubber support is used, the top and bottom surfaces of the support are in full-area contact with a bridge, but with the generation of friction, the support and the bridge are partially loosened, so that on one hand, the compressive stress of the support is increased, and on the other hand, the loosened part of the support is in contact with the outside air, and rubber aging is easy to occur. Over time, the friction area is reduced continuously, and the main beam and the support are subjected to larger horizontal displacement, so that the support is free.
Support void is one of the most common and serious quality problems with current support installations. Because the bridge deck bears larger earthquake load, the main beam and the support generate larger horizontal displacement, and friction generated by various moving loads is transmitted to the contact surface of the support and the bridge, so that the contact surface of the support and the bridge generates relative motion, and the support and the bridge surface are partially emptied under the long-time action. If a certain support is empty, other supports are stressed too much, so that the durability of the supports is affected, and in addition, the stress of a superstructure may be uneven, so that the structure is adversely affected.
In the use of the traditional bridge, because larger earthquake load can generate larger horizontal displacement, the contact area of the support and the girder is reduced, and the moving load of the bridge deck and the bridge deck generate linear friction, the linear friction can be transmitted to the bridge support to have little influence on the bridge under small strain, but the long-term and long-term linear friction can continuously reduce the contact area of the top and the bottom of the support and the bridge, and finally, even the support is emptied, so that the service life of the bridge is greatly reduced, and the economy and the practicability of the bridge are seriously influenced.
Disclosure of Invention
In view of the above, the embodiment of the application provides a friction damping support for a bridge, which converts the friction in the vertical direction into the friction in the circumferential direction by improving the support, and ensures that the contact surface between the top and bottom surfaces of the bridge support and the bridge is always consistent along with the increase of the service time, so that the occurrence of support void can be prevented, and the service life of the bridge is prolonged.
In order to achieve the above purpose, the present application adopts a technical scheme that: a friction damping support of a bridge is positioned below a bridge deck and comprises a middle supporting part, an upper disc part, a lower disc part and a middle rotating part;
the upper disc part and the lower disc part comprise an upper circumferential disc and a lower circumferential disc positioned below the upper circumferential disc, the upper circumferential disc is in contact with a bridge deck, the circle centers of the upper circumferential disc and the lower circumferential disc coincide, and a sliding track groove is formed in the upper surface of the lower circumferential disc;
the middle supporting part is positioned between the upper circumferential disc and the lower circumferential disc and is fixedly connected with both the upper circumferential disc and the lower circumferential disc;
the middle rotating part comprises a fixed support column, a sliding support column, a follow-up support column and a bridge contact surface, wherein a plurality of rotating sleeves are arranged on the fixed support column, the sliding support column and the follow-up support column, and the rotating sleeves on the sliding support column are respectively connected with the rotating sleeves on the fixed support column and the rotating sleeves on the follow-up support column through connecting plates; the bridge contact surface is fixed at the bottom of the bridge deck, the follow-up support column is fixed on the bridge contact surface, and the lower part of the fixed support column is fixed on the lower circumferential disc; the vibration causes the horizontal movement of the bridge deck to drive the follow-up support column to move, so that the sliding support column is driven to slide in the sliding track groove, and the fixed support column is used as a circle center to do circular movement.
Further, the middle supporting part is two rubber plates, and the two rubber plates are symmetrical relative to the diameter axes of the upper disc part and the lower disc part.
Further, the fixed support columns comprise a first fixed support column and a second fixed support column, the upper part of the first fixed support column is fixed on the upper circumferential disc, and the upper part of the second fixed support column is suspended; the sliding support columns comprise a first sliding support column, a second sliding support column and a third sliding support column.
Further, the sliding track groove comprises a first sliding track groove and a second sliding track groove, wherein the outer edge of the first sliding track groove corresponds to the edge position of the upper circumferential disc, and the outer edge of the second sliding track groove is the outer edge of the lower circumferential disc.
Further, the first sliding support column is inlaid in the first sliding track groove and slides along the first sliding track groove; the second sliding support column and the third sliding support column are embedded in the second sliding track groove and slide along the second sliding track groove.
Further, the first fixed support column is arranged at the edge of the lower circumferential disc, and the second fixed support column is arranged at the center of the upper disc part and the center of the lower disc part.
Further, rough patterns are formed on the inner walls of the first sliding track groove and the second sliding track groove.
Further, the first fixed support column is connected with the second sliding support column and the third sliding support column through a rotating sleeve and a connecting plate; the second fixed support column is connected with the first sliding support column through a rotating sleeve and a connecting plate; the first sliding support column is connected with the second sliding support column and the third sliding support column through the rotating sleeve and the connecting plate; the follow-up support column is connected with the second sliding support column and the third sliding support column through the rotating sleeve and the connecting plate.
Further, the fixed support column, the sliding support column and the follow-up support column are respectively provided with a hollow part, and the hollow parts are provided with damping springs.
Further, the number of the damping springs is two, the damping springs are respectively arranged at the upper part and the lower part of the hollow part, and a connecting column is arranged between the two damping springs.
The technical scheme provided by the embodiment of the application has the beneficial effects that: the friction in the vertical direction is converted into friction in the circumferential direction, so that the contact surface between the top and bottom surfaces of the bridge support and the bridge is always kept consistent along with the increase of the service time, the support can be prevented from being emptied, and the service life of the bridge is prolonged.
Drawings
FIG. 1 is a cross-sectional view of a friction cushioning blanket of a bridge of the present application;
FIG. 2 is a top view of the friction cushioning support of the bridge of the present application;
FIG. 3 is a schematic view of the structure of the upper and lower disk portions of the friction damping mount of the bridge of the present application;
FIG. 4 is a schematic view of the structure of the middle rotating part of the friction damping support of the bridge according to the present application;
FIG. 5 is a schematic view of the structure of a support column of the friction damping mount of the bridge of the present application;
fig. 6 is a force-bearing schematic diagram of a conventional bridge.
In the figure: 1. a middle supporting part, 2. An upper disc part, 2-1. An upper disc part, 2-2. A lower disc part, 2-3. A sliding track groove, 2-3-1. A first sliding track groove, 2-3-2. A second sliding track groove, 3-middle rotating part, 3-1. A rotating sleeve, 3-2. A connecting plate, 3-3. A fixed support column, 3-3-1. A first fixed support column, 3-3-2, second fixed support column, 3-4, sliding support column, 3-4-1, first sliding support column, 3-4-2, second sliding support column, 3-4-3, third sliding support column, 3-5, follower support column, 4-1, hollow portion, 4-2, shock absorbing spring, 4-3, connecting column, 5-bridge contact surface, 6-bridge deck, 7-bridge abutment, 8-bridge abutment, 9-cap beam.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be further described with reference to the accompanying drawings.
As shown in fig. 1-2, the embodiment of the application discloses a friction damping support of a bridge, which is arranged between a bridge deck 6 and a capping beam 9 and comprises a middle supporting part 1, an upper disc part 2, a lower disc part 2 and a middle rotating part 3.
For convenience in description and representation of structural details of the friction cushioning seat, fig. 1 is a left side cross-sectional view of fig. 6, and fig. 2, 3 and 4 are top views from the perspective of fig. 1.
As shown in fig. 3, the upper and lower disk portions 2 include an upper disk 2-1 and a lower disk 2-2, and the centers of the upper disk 2-1 and the lower disk 2-2 coincide in the entire support plan view. The diameter of the upper circumferential disc 2-1 is smaller than the diameter of the lower circumferential disc 2-2, for example, the ratio of the diameters of the upper circumferential disc 2-1 and the lower circumferential disc 2-2 is about 4:5. The upper circumferential disc 2-1 is positioned below the bridge deck 6 and is in contact with the bridge deck 6 to play a supporting role.
The upper surface of the lower circumferential disc 2-2 is provided with a sliding track groove 2-3, which comprises a first sliding track groove 2-3-1 and a second sliding track groove 2-3-2, and preferably, the first sliding track groove 2-3-1 and the second sliding track groove 2-3-2 are arc-shaped. The outer edge of the first sliding track groove 2-3-1 corresponds to the edge position of the upper circumferential disc 2-1, and the outer edge of the second sliding track groove 2-3-2 is the outer edge of the lower circumferential disc 2-2. Preferably, the central angles of the first sliding track groove 2-3-1 and the second sliding track groove 2-3-2 are 90 degrees. The inner walls of the first sliding track groove 2-3-1 and the second sliding track groove 2-3-2 are respectively provided with rough patterns so as to improve the friction coefficient. Preferably, the first sliding track groove 2-3-1 and the second sliding track groove 2-3-2 have the same width, and the widths are 1/20 of the diameter of the lower circumferential disc 2-2.
The middle supporting part 1 is positioned between the upper circumferential disc 2-1 and the lower circumferential disc 2-2, and is fixedly connected with the upper circumferential disc 2-1 and the lower circumferential disc 2-2, so that the functions of supporting and damping are achieved. Preferably, the middle support part 1 is a rubber plate. More preferably, the number of the rubber plates is two, and is symmetrical with respect to the diameter axis of the upper and lower disk portions 2. Preferably, the central angle subtended by the middle supporting part 1 is 120 degrees.
As shown in fig. 4, the middle rotating part 3 includes two fixed support columns 3-3, two sliding support columns 3-4, two following support columns 3-5 and a bridge contact surface 5, preferably, the number of the fixed support columns 3-3 is two, namely a first fixed support column 3-3-1 and a second fixed support column 3-3-2, and the number of the sliding support columns 3-4 is three, namely a first sliding support column 3-4-1, a second sliding support column 3-4-2 and a third sliding support column 3-4-3. Preferably, the fixed support column 3-3, the sliding support column 3-4 and the follow-up support column 3-5 are made of steel materials. The upper part and the lower part of the first fixed support column 3-3-1 are respectively and correspondingly fixed on the upper circumference disc 2-1 and the lower circumference disc 2-2, and the upper part and the lower part of the second fixed support column 3-3-2 are suspended and fixed on the lower circumference disc 2-2. The bridge contact surface 5 is fixed at the bottom of the bridge deck 6, and the follow-up support columns 3-5 are fixed on the bridge contact surface 5.
As shown in fig. 5, the hollow part 4-1 is provided inside all the support columns (including the fixed support column 3-3, the sliding support column 3-4 and the follow-up support column 3-5), and the damping spring 4-2 is provided in the hollow part 4-1. Preferably, the number of the damping springs 4-2 is two, the damping springs are respectively arranged at the upper part and the lower part of the hollow part 4-1, and a connecting column 4-3 is arranged between the two damping springs 4-2. The connecting columns 4-3 assist the middle support 1 in damping when the deck 6 is subjected to a large vertical load. The diameter of the connecting column 4-3 is slightly smaller than that of the supporting column. Preferably, the connecting column 4-3 is made of steel.
The outside of all support columns is provided with a rotating sleeve 3-1, the rotating sleeve 3-1 can rotate on all support columns, the rotating sleeves 3-1 are connected through a connecting plate 3-2, and the connecting plate 3-2 has certain elasticity. The first fixed support columns 3-3-1 are arranged at the edge of the lower circumferential disc 2-2, and the second fixed support columns 3-3-2 are arranged at the circle centers of the upper disc part 2 and the lower disc part 2. Preferably, the diameter of the fixed support column 3-3 is 1/20 of the diameter of the lower circumferential disc 2-2. The two columns are fixed with the connected disk surface in an adhesive joint way. Preferably, the connecting plate 3-2 is made of steel.
The first fixed support column 3-3-1 is connected with the second sliding support column 3-4-2 and the third sliding support column 3-4-3 through a rotating sleeve 3-1 and a connecting plate 3-2; the second fixed support column 3-3-2 is connected with the first sliding support column 3-4-1 through a rotating sleeve 3-1 and a connecting plate 3-2; the first sliding support column 3-4-1 is connected with the second sliding support column 3-4-2 and the third sliding support column 3-4-3 through a rotating sleeve 3-1 and a connecting plate 3-2; the follow-up support column 3-5 is connected with the second sliding support column 3-4-2 and the third sliding support column 3-4-3 through a rotating sleeve 3-1 and a connecting plate 3-2. The first sliding support column 3-4-1 is embedded in the first sliding track groove 2-3-1 and can slide along the first sliding track groove 2-3-1; the second sliding support column 3-4-2 and the third sliding support column 3-4-3 are embedded in the second sliding track groove and can slide along the second sliding track groove 2-3-2; the follow-up support columns 3-5 are suspended outside the upper circumferential disc 2-1 and the lower circumferential disc 2-2 and fixedly connected with the bridge contact panel 5, and the bridge contact panel 5 is fixedly connected with the bridge deck 6.
As shown in fig. 6, in the use process of the conventional bridge, due to a larger earthquake load, the bridge deck 6 generates a larger horizontal displacement (indicated by double arrows in fig. 6), so that the contact area between the bridge support 7 and the bridge 6 is reduced, and the moving load of the bridge deck and the bridge deck generate linear friction, which is transmitted to the bridge support 7, and the bridge is not greatly influenced under a small strain, but the contact area between the top surface of the bridge support 7 and the bridge 6 is continuously reduced due to the linear friction for a long period of time, and finally, even the support is in a void state, so that the service life of the bridge is greatly reduced, and the economy and the practicability of the bridge are seriously influenced.
According to the friction damping support, when friction occurs, the movement direction of the bridge contact surface 5 is consistent with the friction direction (indicated by double arrows in fig. 2 and 6), so that the follow-up support column 3-5 is driven to move, the follow-up support column 3-5 drives the second sliding support column 3-4-2 and the third sliding support column 3-4-3 through the connecting plate 3-2, the second sliding support column 3-4-2 and the third sliding support column 3-4-3 do circular movement by taking the first fixed support column 3-3-1 as a circle center, and the first sliding support column 3-4-1 is driven to do circular movement by taking the second fixed support column 3-3-2 as the circle center. Namely, the linear motion is converted into circular motion, namely, the friction surface is ensured to be a circumferential surface.
The technical scheme provided by the embodiment of the application has the beneficial effects that: the friction in the vertical direction is converted into friction in the circumferential direction, so that the contact surface between the top and bottom surfaces of the bridge support and the bridge is always kept consistent along with the increase of the service time, the support can be prevented from being emptied, and the service life of the bridge is prolonged.
Noteworthy are: in the description of the present application, the meaning of "a number" is one or more than one unless specifically defined otherwise. In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, as will be understood by those of ordinary skill in the art, in view of the specific meaning of the terms in the present application.
In this document, terms such as front, rear, upper, lower, etc. are defined with respect to the positions of the components in the drawings and with respect to each other, for clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the claimed application.
The embodiments described above and features of the embodiments herein may be combined with each other without conflict.
The foregoing description of the preferred embodiments of the application is not intended to limit the application to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the application are intended to be included within the scope of the application.
Claims (10)
1. The utility model provides a friction shock attenuation support of bridge, is located the below of bridge floor, its characterized in that: comprises a middle supporting part, an upper disc part, a lower disc part and a middle rotating part;
the upper disc part and the lower disc part comprise an upper circumferential disc and a lower circumferential disc positioned below the upper circumferential disc, the upper circumferential disc is in contact with a bridge deck, the circle centers of the upper circumferential disc and the lower circumferential disc coincide, and a sliding track groove is formed in the upper surface of the lower circumferential disc; the diameter of the upper circumferential disc is smaller than that of the lower circumferential disc, and the middle supporting part is positioned between the upper circumferential disc and the lower circumferential disc and is fixedly connected with both the upper circumferential disc and the lower circumferential disc;
the middle rotating part comprises a fixed support column, a sliding support column, a follow-up support column and a bridge contact surface, wherein a plurality of rotating sleeves are arranged on the fixed support column, the sliding support column and the follow-up support column, and the rotating sleeves on the sliding support column are respectively connected with the rotating sleeves on the fixed support column and the rotating sleeves on the follow-up support column through connecting plates; the bridge contact surface is fixed at the bottom of the bridge deck, the follow-up support column is fixed on the bridge contact surface, and the lower part of the fixed support column is fixed on the lower circumferential disc; the vibration causes the horizontal movement of the bridge deck to drive the follow-up support column to move, so that the sliding support column is driven to slide in the sliding track groove, and the fixed support column is used as a circle center to do circular movement.
2. The bridge friction cushioning support according to claim 1, wherein: the middle supporting part is two rubber plates, and the two rubber plates are symmetrical relative to the diameter axes of the upper disc part and the lower disc part.
3. The bridge friction cushioning support according to claim 1, wherein: the fixed support columns comprise first fixed support columns and second fixed support columns, the upper parts of the first fixed support columns are fixed on the upper circumferential disc, and the upper parts of the second fixed support columns are suspended; the sliding support columns comprise a first sliding support column, a second sliding support column and a third sliding support column.
4. A friction cushioning support according to claim 3, wherein: the sliding track groove comprises a first sliding track groove and a second sliding track groove, the outer edge of the first sliding track groove corresponds to the edge position of the upper circumferential disc, and the outer edge of the second sliding track groove is the outer edge of the lower circumferential disc.
5. The bridge friction cushioning support according to claim 4, wherein: the first sliding support column is embedded in the first sliding track groove and slides along the first sliding track groove; the second sliding support column and the third sliding support column are embedded in the second sliding track groove and slide along the second sliding track groove.
6. A friction cushioning support according to claim 3, wherein: the first fixed support column is arranged at the edge of the lower circumferential disc, and the second fixed support column is arranged at the circle center of the upper disc part and the lower disc part.
7. A friction cushioning support according to claim 3, wherein: the inner walls of the first sliding track groove and the second sliding track groove are respectively provided with rough patterns.
8. A friction cushioning support according to claim 3, wherein: the first fixed support column is connected with the second sliding support column and the third sliding support column through the rotating sleeve and the connecting plate; the second fixed support column is connected with the first sliding support column through a rotating sleeve and a connecting plate; the first sliding support column is connected with the second sliding support column and the third sliding support column through the rotating sleeve and the connecting plate; the follow-up support column is connected with the second sliding support column and the third sliding support column through the rotating sleeve and the connecting plate.
9. The bridge friction cushioning support according to claim 1, wherein: the inside of fixed support column, slip support column and follow-up support column all is equipped with hollow part be equipped with damping spring.
10. The bridge friction cushioning support according to claim 9, wherein: the number of the damping springs is two, the damping springs are respectively arranged at the upper part and the lower part of the hollow part, and a connecting column is arranged between the two damping springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811280459.6A CN109338875B (en) | 2018-10-30 | 2018-10-30 | Friction damping support for bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811280459.6A CN109338875B (en) | 2018-10-30 | 2018-10-30 | Friction damping support for bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109338875A CN109338875A (en) | 2019-02-15 |
| CN109338875B true CN109338875B (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811280459.6A Active CN109338875B (en) | 2018-10-30 | 2018-10-30 | Friction damping support for bridge |
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| CN (1) | CN109338875B (en) |
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| JP3218420U (en) * | 2017-09-12 | 2018-10-11 | 山西大学 | Support mechanism of road bridge approach slab |
| CN209397483U (en) * | 2018-10-30 | 2019-09-17 | 中国地质大学（武汉） | A kind of damping by friction support of bridge |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3009637A1 (en) * | 1980-03-13 | 1981-09-24 | Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart | Mobile laid multi span bridge telescopic prop - has automatically fixed strut linked to slide in girder tracks |
| JPH0585902U (en) * | 1992-04-22 | 1993-11-19 | オイレス工業株式会社 | Movable bearing |
| JP2002294630A (en) * | 2001-03-28 | 2002-10-09 | Hec Corp | Supporting structure |
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| Publication number | Publication date |
|---|---|
| CN109338875A (en) | 2019-02-15 |
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