CN110344320B - Magnetorheological elastomer bridge support - Google Patents
Magnetorheological elastomer bridge support Download PDFInfo
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- CN110344320B CN110344320B CN201910629204.4A CN201910629204A CN110344320B CN 110344320 B CN110344320 B CN 110344320B CN 201910629204 A CN201910629204 A CN 201910629204A CN 110344320 B CN110344320 B CN 110344320B
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- China
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- magnetorheological elastomer
- cover plate
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- bridge
- lower cover
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L21/00—Compositions of unspecified rubbers
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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
- E01D19/041—Elastomeric bearings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0856—Iron
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/01—Magnetic additives
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention relates to a magnetorheological elastomer bridge bearing, which comprises: a support column and a base; the base comprises a steel cylinder, an upper cover plate, a lower cover plate and a magnetorheological elastomer externally provided with an electromagnetic coil, and the lower cover plate is connected with the bridge pier through a bolt; the lower cover plate is provided with a plurality of round holes, a plurality of cylindrical grooves are arranged at the bottom of the magnetorheological elastomer and the top of the pier corresponding to the round holes, and spring columns are arranged in the cylindrical grooves; the upper cover plate is provided with a through hole, the top of the magnetorheological elastomer is provided with a groove corresponding to the through hole, and the bottom of the support column is inserted into the groove; the support column is provided with an acceleration sensor, a control module and a power supply module, the acceleration sensor is used for detecting the vibration acceleration of the bridge deck and feeding the vibration acceleration back to the control module, when the acceleration value exceeds a threshold value, the control module controls the power supply module to supply power to the electromagnetic coil, and a magnetic field is applied to the magnetorheological elastomer to adjust the damping and the rigidity of the magnetorheological elastomer. The magnetorheological elastomer is arranged in the base, so that the bridge support has the functions of sound absorption, noise reduction and vibration reduction. The invention has simple structure and convenient construction.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, and relates to a magnetorheological elastomer bridge support.
Background
In the age of fast paced life, people's travel is gradually developed from former walking to transportation means such as cars, trains, airplanes, ships and the like. A series of roads such as corresponding roads and railways are beginning to appear, and gradually develop from land construction to air construction in development engineering. Under such conditions, the role of the bridge is also increasingly important, because in the construction of long roads, it is often necessary to cross rivers, valleys, etc., and bridges are needed for communication. In bridge construction, a bridge support is an important member for connecting and restraining upper and lower structures of a bridge, and is an indispensable part for bearing the weight of the bridge. At present, railway, highway bridge beam supports are usually fixed type because the support of fixed type can bear horizontal load and can bear vertical load again. However, because of its fixed form, the displacement is very small, and the support ends of the beams are not free to rotate, and do not allow any expansion or contraction in the vertical direction, the support is easily worn or cracked, and the support is damaged greatly after long-term use.
Disclosure of Invention
The invention aims to provide a magnetorheological elastomer bridge support, which aims to solve the problems that the conventional bridge support cannot be stretched in the vertical direction, so that the aim of vibration reduction cannot be fulfilled, sound absorption and noise reduction cannot be realized, and the problem that once the support is damaged, the support is inconvenient to disassemble is solved.
The invention provides a magnetorheological elastomer bridge bearing, which comprises: the base comprises a steel cylinder, an upper cover plate and a lower cover plate which are respectively covered at the upper and lower openings of the steel cylinder, and a magnetorheological elastomer filled in the steel cylinder, wherein an electromagnetic coil is wound outside the magnetorheological elastomer; the lower cover plate is fixedly connected with the bridge pier through bolts, a plurality of round holes are formed in the lower cover plate, a plurality of cylindrical grooves are formed in the positions, corresponding to the round holes, of the bottom of the magnetorheological elastomer and the top of the bridge pier, and spring columns are arranged in the cylindrical grooves; the upper cover plate is provided with a through hole, the top of the magnetorheological elastomer is provided with a groove relative to the through hole, and the bottom of the support column is inserted into the groove; the support column is provided with a support plate at the upper end, an acceleration sensor, a control module and a power supply module are mounted on the support plate, the acceleration sensor is used for detecting the vibration acceleration of the bridge deck and feeding back the vibration acceleration to the control module, and when the acceleration value exceeds a threshold value, the control module controls the power supply module to supply power to the electromagnetic coil and applies a magnetic field to the magnetorheological elastomer to adjust the damping and the rigidity of the magnetorheological elastomer;
the magnetorheological elastomer comprises the following components in percentage by weight: 100-150 parts of a rubber matrix, 600-700 parts of magnetic particles, 16-25 parts of a vulcanizing agent, 4-5 parts of a vulcanization accelerator and 120-180 parts of a filling material, wherein the filling material comprises 20-30 parts of a plasticizer, 30-50 parts of a dispersing agent, 50-60 parts of a binder, 10-20 parts of a reinforcing agent and 10-20 parts of a cold-resistant agent; the binder is one of silicon carbide, graphene, carbon nano tubes or silicon dioxide; the reinforcing agent is fumed silica.
In the magnetorheological elastomer bridge support, the magnetic particles are micron-sized carbonyl iron powder and silicon steel powder in a ratio of 25:1, and the magnetic particles are selected to improve the magnetic permeability and reduce the eddy current loss on the premise of ensuring the saturation magnetization.
In the magnetorheological elastomer bridge support, the vulcanizing agent is selenium, tellurium, peroxide or sulfur; the vulcanization accelerator is alkali metal oxide; the plasticizer is dimethyl silicone oil; the dispersant is methyl amyl alcohol or polyurethane; the cold resistant agent is adipate.
In the magnetorheological elastomer bridge support, the upper cover plate and the lower cover plate are both steel plates, and the support columns are steel columns.
In the magnetorheological elastomer bridge support, the spring columns are air rubber springs.
The magnetorheological elastomer bridge support disclosed by the invention at least has the following beneficial effects:
(1) when the bridge support is installed, the magnetorheological elastomer prepared by the mold is wound with the electromagnetic coil and then placed in the steel cylinder, and the magnetic field is applied to the magnetorheological elastomer to adjust the rigidity and the damping of the magnetorheological elastomer, so that the bridge support has good noise reduction and vibration reduction effects, collapse and splitting of the bridge support and cracks generated under the action of uneven load are reduced, and damage to the bridge support due to uneven settlement of a foundation and large bridge deck load is compensated. In addition, the lower cover plate is connected with the pier in a bolt lap joint mode, so that the lower cover plate is convenient to disassemble in the using process, and the replacement of the support and the maintenance of the pier are facilitated.
(2) Set up a plurality of air rubber springs between pier and base, adjust the vertical displacement of structure, the input that can effectual suppression vertical vibration wave is favorable to remedying fixing support's not flexible not enough, reduces support wearing and tearing or fracture to can reduce the vibration that the bridge floor vehicle traveles and bring. The bridge support is simple in structure and convenient to disassemble, and the added magnetorheological elastomer can absorb sound and reduce noise, can effectively reduce vibration, and avoids the phenomenon that the bridge support is damaged due to fatigue.
Drawings
FIG. 1 is a cross-sectional view of a magnetorheological elastomer bridge bearing of the present invention.
Detailed Description
As shown in fig. 1, the magnetorheological elastomer bridge bearing of the present invention comprises: the support column comprises a support column 1 and a base, wherein the base comprises a steel cylinder 21, an upper cover plate 22 and a lower cover plate 23 which are respectively covered on the upper opening and the lower opening of the steel cylinder 21, and a magnetorheological elastomer 24 filled in the steel cylinder 21. An electromagnetic coil 25 is wound outside the magnetorheological elastomer 24.
The lower cover plate 23 is fixedly connected with the pier 5 through the bolt 3, a plurality of round holes are formed in the lower cover plate 23, a plurality of cylindrical grooves are formed in the positions, corresponding to the round holes, of the bottom of the magnetorheological elastomer 24 and the top of the pier 5, and the spring columns 4 are arranged in the cylindrical grooves.
The upper cover plate 22 is provided with a through hole, the top of the magnetorheological elastomer 24 is provided with a groove corresponding to the through hole, and the bottom of the support column 1 is inserted into the groove. The upper end of support column 1 is equipped with backup pad 11, install acceleration sensor, control module and power module on the backup pad 11, not drawn in the figure. The vibration acceleration of the bridge deck is detected by the acceleration sensor and fed back to the control module, and when the acceleration value exceeds a threshold value, the control module controls the power supply module to supply power to the electromagnetic coil 25 and applies a magnetic field to the magnetorheological elastomer 24 to adjust the damping and the rigidity of the magnetorheological elastomer.
In specific implementation, the magnetorheological elastomer comprises the following components in percentage by weight: 100-150 parts of a rubber matrix, 600-700 parts of magnetic particles, 16-25 parts of a vulcanizing agent, 4-5 parts of a vulcanization accelerator and 120-180 parts of a filling material, wherein the filling material comprises 20-30 parts of a plasticizer, 30-50 parts of a dispersing agent, 50-60 parts of a binder, 10-20 parts of a reinforcing agent and 10-20 parts of a cold-resistant agent; the binder is one of silicon carbide, graphene, carbon nano tubes or silicon dioxide; the reinforcing agent is fumed silica.
When the magnetic particle is specifically implemented, the micron-sized carbonyl iron powder and the silicon steel powder are selected as the magnetic particles, the ratio of the micron-sized carbonyl iron powder to the silicon steel powder is 25:1, and the magnetic particles are selected to improve the magnetic permeability and reduce the eddy current loss on the premise of ensuring the saturation magnetization.
In specific implementation, the vulcanizing agent is selenium, tellurium, peroxide or sulfur; the vulcanization accelerator is alkali metal oxide; the plasticizer is dimethyl silicone oil; the dispersant is methyl amyl alcohol or polyurethane; the cold resistant agent is adipate.
In specific implementation, the magnetorheological elastomer is prepared by the following method: putting the rubber matrix, the magnetic particles and all filling materials into a rubber mixing machine, mechanically and uniformly stirring for 20 minutes, placing the rubber mixing machine into a vacuum barrel at the temperature of 80 ℃ for defoaming, and injecting the rubber mixing machine into an aluminum mold; and (3) pouring a vulcanizing agent and a vulcanization accelerator into a mold, vulcanizing at 150 ℃ for about 20 minutes, and simultaneously applying a magnetic field with the magnetic induction intensity of 0.4T to prepare the anisotropic magnetorheological elastomer.
In specific implementation, the upper cover plate 22 and the lower cover plate 23 are both steel plates, and the support column 1 is a steel column. The spring column 4 is an air rubber spring. The air rubber spring is made of rubber and is internally filled with compressed air. When the device is specifically implemented, compressed air is filled into the sealed container, the elastic effect is realized by utilizing the compressibility of the gas, the high-frequency vibration can be isolated, and the sound insulation and noise reduction can be realized.
The magnetorheological elastomer externally provided with the electromagnetic coil is arranged in the base of the bridge support, the rigidity and the damping of the magnetorheological elastomer can be adjusted by applying a magnetic field to the magnetorheological elastomer, and the bridge support has good noise reduction and vibration reduction effects. Thereby reducing the collapse and splitting of the bridge bearing and the cracks generated by the action of uneven load. In addition, the lower cover plate is connected with the pier in a bolt lap joint mode, so that the lower cover plate is convenient to disassemble in the using process, and the replacement of the support and the maintenance of the pier are facilitated.
Set up a plurality of air rubber springs between pier and base, adjust the vertical displacement of structure, can effectual suppression vertical vibration wave's input to can reduce the vibration that the bridge floor vehicle traveles and bring. The bridge support is simple in structure and convenient to disassemble, and the added magnetorheological elastomer can absorb sound and reduce noise, can effectively reduce vibration, and avoids the phenomenon that the bridge support is damaged due to fatigue.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined by the appended claims.
Claims (1)
1. A magnetorheological elastomer bridge bearing, comprising: the base comprises a steel cylinder, an upper cover plate and a lower cover plate which are respectively covered at the upper and lower openings of the steel cylinder, and a magnetorheological elastomer filled in the steel cylinder, wherein an electromagnetic coil is wound outside the magnetorheological elastomer; the lower cover plate is fixedly connected with the bridge pier through bolts, a plurality of round holes are formed in the lower cover plate, a plurality of cylindrical grooves are formed in the positions, corresponding to the round holes, of the bottom of the magnetorheological elastomer and the top of the bridge pier, and spring columns are arranged in the cylindrical grooves; the upper cover plate is provided with a through hole, the top of the magnetorheological elastomer is provided with a groove relative to the through hole, and the bottom of the support column is inserted into the groove; the support column is provided with a support plate at the upper end, an acceleration sensor, a control module and a power supply module are mounted on the support plate, the acceleration sensor is used for detecting the vibration acceleration of the bridge deck and feeding back the vibration acceleration to the control module, and when the acceleration value exceeds a threshold value, the control module controls the power supply module to supply power to the electromagnetic coil and applies a magnetic field to the magnetorheological elastomer to adjust the damping and the rigidity of the magnetorheological elastomer;
the magnetorheological elastomer comprises the following components in percentage by weight: 100-150 parts of a rubber matrix, 600-700 parts of magnetic particles, 16-25 parts of a vulcanizing agent, 4-5 parts of a vulcanization accelerator and 120-180 parts of a filling material, wherein the filling material comprises 20-30 parts of a plasticizer, 30-50 parts of a dispersing agent, 50-60 parts of a binder, 10-20 parts of a reinforcing agent and 10-20 parts of a cold-resistant agent; the binder is one of silicon carbide, graphene, carbon nano tubes or silicon dioxide; the reinforcing agent is fumed silica;
the magnetic particles are selected from micron-sized carbonyl iron powder and silicon steel powder in a ratio of 25:1, and the magnetic particles are selected to improve the magnetic permeability and reduce the eddy current loss on the premise of ensuring the saturation magnetization;
the vulcanizing agent is selenium, tellurium, peroxide or sulfur; the vulcanization accelerator is alkali metal oxide; the plasticizer is dimethyl silicone oil; the dispersant is methyl amyl alcohol or polyurethane; the cold-resistant agent is adipate;
the upper cover plate and the lower cover plate are both steel plates, and the support columns are steel columns; the spring column is an air rubber spring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910629204.4A CN110344320B (en) | 2019-07-12 | 2019-07-12 | Magnetorheological elastomer bridge support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910629204.4A CN110344320B (en) | 2019-07-12 | 2019-07-12 | Magnetorheological elastomer bridge support |
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| CN110344320A CN110344320A (en) | 2019-10-18 |
| CN110344320B true CN110344320B (en) | 2021-09-03 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761179B (en) * | 2019-11-15 | 2021-12-14 | 宜春市通畅工程检测有限公司 | Highway bridge pier anti-settlement device |
| CN111851280B (en) * | 2020-08-27 | 2021-12-17 | 江苏润通工程设备有限公司 | Shock absorption and isolation support for bridge |
| CN114196077A (en) * | 2021-12-28 | 2022-03-18 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Track pad raw material composition, track pad, manufacturing method and application thereof |
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| CN108727710A (en) * | 2018-06-05 | 2018-11-02 | 重庆大学 | Preparation method with high heat-resisting and tensile properties magnetic rheology elastic body |
| CN109899443A (en) * | 2019-04-15 | 2019-06-18 | 南京林业大学 | A kind of vibration absorber based on magnetic rheology elastic body |
| CN109972667A (en) * | 2019-03-20 | 2019-07-05 | 南京理工大学 | A kind of composite-structure magnetorheological elastomer negative stiffness isolator |
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2019
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Patent Citations (6)
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| JP2000283230A (en) * | 1999-03-31 | 2000-10-13 | Kumagai Gumi Co Ltd | Base isolation device and base isolation structure |
| CN105485241A (en) * | 2015-12-31 | 2016-04-13 | 浙江科技学院 | Magnetorheological elastomer shock absorber |
| CN205576726U (en) * | 2016-04-26 | 2016-09-14 | 广东宇泰减震科技有限公司 | Steel bar reinforcing type damping rubber supporting seat |
| CN108727710A (en) * | 2018-06-05 | 2018-11-02 | 重庆大学 | Preparation method with high heat-resisting and tensile properties magnetic rheology elastic body |
| CN109972667A (en) * | 2019-03-20 | 2019-07-05 | 南京理工大学 | A kind of composite-structure magnetorheological elastomer negative stiffness isolator |
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Effective date of registration: 20230404 Address after: 120-1 Hongrun Road, Yuhong District, Shenyang City, Liaoning Province, 110027 (1 gate) Patentee after: Liaoning Xinfu Siyuan Rubber and Plastic Products Co.,Ltd. Address before: 110168 No. 9 Hunnan East Road, Hunnan District, Shenyang City, Liaoning Province Patentee before: SHENYANG JIANZHU University |
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