CN210238273U - Multidimensional seismic isolation and reduction intelligent bridge bearing - Google Patents
Multidimensional seismic isolation and reduction intelligent bridge bearing Download PDFInfo
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- CN210238273U CN210238273U CN201921090688.1U CN201921090688U CN210238273U CN 210238273 U CN210238273 U CN 210238273U CN 201921090688 U CN201921090688 U CN 201921090688U CN 210238273 U CN210238273 U CN 210238273U
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- permanent magnet
- middle connecting
- magnetorheological elastomer
- bridge bearing
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- Bridges Or Land Bridges (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The utility model discloses a multidimensional vibration reduction and isolation intelligent bridge bearing, which comprises an upper connecting plate, a middle connecting plate, a lower connecting plate, a composite spring, an air rubber spring, an annular stress assembly, a coil, a lead core, an upper permanent magnet, a lower permanent magnet, a power supply and a sensor. A composite spring and an air rubber spring are arranged between the upper connecting plate and the middle connecting plate. The annular stress assembly is formed by alternately vulcanizing a magnetorheological elastomer and a magnetic steel plate, and a lead core is poured in the center of the annular stress assembly. The upper permanent magnet and the lower permanent magnet are arranged at the upper end and the lower end of the annular stress assembly and are connected with the middle connecting plate and the lower connecting plate. The coil is wound on the outer side of the annular stress member. The sensor is connected with the middle connecting plate. The composite spring and the air rubber spring are utilized to effectively reduce the input of vibration and vertical seismic waves, and due to the existence of the permanent magnet, the support has high horizontal rigidity under a normal working state, after a power supply is switched on, the coil generates a magnetic field to offset the magnetic field generated by the permanent magnet, and the horizontal rigidity of the support is low, so that the stability of an upper bridge structure is ensured.
Description
Technical Field
The utility model belongs to the technical field of the structure shock insulation, a multidimensional shock absorption and insulation intelligent bridge bearing is related to.
Background
The bridge foundation shock insulation means that a shock insulation device is arranged between a bridge foundation and an upper structure to form a shock insulation layer, the shock insulation device is used for isolating or dissipating seismic energy so as to avoid or reduce the transmission of the seismic energy to the upper structure, the seismic reaction of the bridge is reduced, and the main structure above the shock insulation layer only generates small relative motion and deformation during the earthquake, so that the bridge is not damaged or collapsed under the action of the earthquake.
The bridge bearing is a common mode for bridge foundation shock insulation, most commonly is a laminated rubber shock insulation bearing, although the structure is simple, the performance is good, and the cost is low, the rigidity and damping parameters of the laminated rubber shock insulation bearing cannot be adjusted, so that the laminated rubber shock insulation bearing cannot respond to the change of the external environment.
The magnetorheological elastomer is a novel magnetorheological intelligent material, is formed by solidifying high molecular polymers (such as rubber and the like) and ferromagnetic particles under the action of an external magnetic field, has the advantages of the magnetorheological material and the elastomer, overcomes the defects of easy sedimentation, poor stability and the like of the magnetorheological fluid, and has good development prospect as an intelligent shock absorption and isolation support for bridges.
At present, most of magnetorheological elastomer intelligent supports adopt an external power supply to drive an excitation mechanism, and form current through a magnetic conduction assembly, so that the rigidity and the damping are adjusted. However, under the action of large loads such as earthquake, the structure is damaged under the action of earthquake due to the insufficient initial transverse rigidity, strength and damping of the structure.
SUMMERY OF THE UTILITY MODEL
The utility model provides a multidimensional seismic isolation intelligent bridge bearing, this support satisfy the input of effectively preventing vertical seismic wave and increase initial transverse rigidity, can adjust the rigidity and the damping of support under the earthquake effect, have important practical meaning to reducing the vibration response of bridge construction under the earthquake.
The utility model provides a multidimensional seismic isolation intelligent bridge bearing, include: the coil-type power transmission device comprises an upper connecting plate, a middle connecting plate and a lower connecting plate, wherein an annular stress assembly is fixedly arranged between the middle connecting plate and the lower connecting plate, and a coil is wound outside the annular stress assembly; the annular stress assembly comprises an upper permanent magnet, a lower permanent magnet and a magnetorheological elastomer stack, the upper permanent magnet and the lower permanent magnet are respectively arranged at the upper end and the lower end of the magnetorheological elastomer stack, and the magnetorheological elastomer stack is formed by alternately vulcanizing a plurality of magnetorheological elastomer thin plates and a plurality of magnetic steel plates; the center parts of the upper connecting plate and the middle connecting plate are connected through air rubber spring supports, and the peripheries of the upper connecting plate and the middle connecting plate are connected through a plurality of composite spring supports; the bridge support is wrapped by an insulating sleeve.
The utility model discloses an among the multidimensional shock absorption and isolation intelligent bridge bearing install the sensor that is used for detecting the bridge vibrations on the well connecting plate, the sensor is connected with control module, and control module controls power module and supplies power to the coil according to the detected signal of sensor, and then changes bridge bearing's rigidity and damping.
The utility model discloses an among the multidimensional seismic isolation intelligent bridge bearing that subtracts, run through the lead core has been pour to the central point that magnetorheological elastomers piled up puts.
The utility model discloses an among the multidimensional shock absorption and isolation intelligent bridge bearing, air rubber spring makes its inside compressed air that fills by rubber.
The utility model discloses an among the multidimensional shock absorption and isolation intelligent bridge bearing, compound spring is formed by the compound vulcanization of parcel one deck rubber materials around metal coil spring.
The utility model discloses an among the multidimensional shock absorption and isolation intelligent bridge bearing, the upper junction plate adopts magnetic current to become elastomer, and well connecting plate and lower connecting plate are made by the material that the magnetic conductivity is good.
The utility model discloses a multidimensional seismic isolation intelligent bridge bearing has following advantage and beneficial effect at least:
(1) the bridge support effectively inhibits the input of vertical seismic waves through the combined action of the composite spring and the air rubber spring, and can reduce the vibration caused by the running of vehicles on the bridge deck;
(2) the bridge support is in a passive working mode under a normal environment, and external energy supply is not needed. Due to the existence of the permanent magnet, the magnetorheological elastomer stack works in a larger magnetic field, so that the support has high horizontal rigidity and can ensure the stability of the upper building structure. When an earthquake comes, a reverse magnetic field is generated in the magnetorheological elastomer stack through the electromagnetic coil to counteract the magnetic field generated by the permanent magnet, and at the moment, the magnetorheological elastomer works in a lower magnetic field environment, and the horizontal rigidity of the support is lower, so that the aim of protecting the upper building is fulfilled.
(3) The center of the annular stress assembly of the bridge support is provided with the lead core, so that the damping of the support is increased.
(4) The air rubber spring that this bridge beam supports adopted can isolated high-frequency vibration and can give sound insulation, fall make an uproar.
(5) The bridge support has the advantages of simple structure, good stability, strong practicability and the like.
Drawings
FIG. 1 is a cross-sectional view of the multi-dimensional seismic isolation and reduction intelligent bridge bearing of the present invention;
FIG. 2 is a schematic cross-sectional view of an embodiment A-A of the multi-dimensional seismic isolation and reduction intelligent bridge support of the present invention;
FIG. 3 is a schematic cross-sectional view of an embodiment B-B of the multidimensional seismic isolation and reduction intelligent bridge bearing of the utility model.
Detailed Description
As shown in fig. 1 to 3, the utility model discloses a multidimensional seismic isolation and reduction intelligent bridge bearing, include: upper junction plate 1, well connecting plate 2 and lower connecting plate 3. An annular stress assembly is fixedly arranged between the middle connecting plate 2 and the lower connecting plate 3, and a coil 11 is wound outside the annular stress assembly. The annular stress assembly comprises an upper permanent magnet 6, a lower permanent magnet 7 and a magnetorheological elastomer stack, wherein the upper permanent magnet 6 and the lower permanent magnet 7 are respectively arranged at the upper end and the lower end of the magnetorheological elastomer stack. The magnetorheological elastomer stack is formed by alternately vulcanizing a plurality of magnetorheological elastomer thin plates 8 and a plurality of magnetic steel plates 9. The center parts of the upper connecting plate 1 and the middle connecting plate 2 are supported and connected through an air rubber spring 4, and the peripheries of the upper connecting plate and the middle connecting plate are supported and connected through a plurality of composite springs 5; the bridge supports are wrapped with insulating sleeves 14.
When in implementation, the magnetorheological elastomer sheet 8 comprises the following components in percentage by weight: 100-150 parts of silicon rubber, 600-700 parts of magnetic particles, 16-25 parts of vulcanizing agent, 4-5 parts of vulcanization accelerator and 120-180 parts of filling material, wherein the filling material comprises 20-30 parts of plasticizer, 30-50 parts of dispersing agent, 50-60 parts of binder, 10-20 parts of reinforcing agent and 10-20 parts of 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 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 an alkali metal oxide. The plasticizer is dimethyl silicone oil. The dispersing agent is methyl amyl alcohol or polyurethane; the cold resistant agent is adipate.
As shown in fig. 1, a sensor 12 for detecting bridge vibration is mounted on the middle connection plate 2, the sensor 12 is connected with a control module 15, and the control module 15 controls the power module 13 to supply power to the coil 11 according to a detection signal of the sensor 12, so that the bridge support is monitored in real time and connected with the power module 13 according to actual conditions, and further the rigidity and damping of the bridge support are changed.
As shown in fig. 1, a lead core 10 is cast in the center of the magnetorheological elastomer stack of the bridge support, and the lead core 10 penetrates through the magnetorheological elastomer stack, so that the damping of the support is increased. The upper connecting plate 1 is made of a magnetorheological elastomer and is conveniently connected with the air rubber spring and the compound spring. The middle connecting plate 2 and the lower connecting plate 3 are made of materials with good magnetic permeability, such as low-carbon steel, silicon steel and the like, so that a lower structure formed by the middle connecting plate 2 and the lower connecting plate 3 can form a closed loop after being electrified, and the rigidity and the damping of the elastomer can be changed.
The air rubber spring 4 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 composite spring 5 is formed by wrapping a layer of rubber material around a metal spiral spring and compounding and vulcanizing the rubber material. Through the combined action of the compound spring 5 and the air rubber spring 4, the input of vertical seismic waves can be effectively inhibited, and the vibration caused by the running of a bridge deck vehicle can be reduced.
The utility model discloses a multidimensional seismic isolation and reduction intelligent bridge bearing adopts the following method construction to make:
step 1: weighing the following components in proportion: 100 parts of silicon rubber, 600 parts of magnetic particles, 16 parts of sulfur, 4 parts of alkali metal oxide and 120 parts of filling materials, wherein the filling materials comprise 20 parts of dimethyl silicone oil, 30 parts of methyl amyl alcohol, 50 parts of carbon nano tubes, 10 parts of fumed silica and 10 parts of adipate;
step 2: putting the silicon rubber, 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 80 ℃ for defoaming, and injecting the rubber mixing machine into an annular aluminum mold;
and step 3: pouring sulfur and alkali metal oxide into a mold, vulcanizing for about 20 minutes at 150 ℃, and simultaneously applying a magnetic field with the magnetic induction intensity of 0.4T to prepare the anisotropic magnetorheological elastomer sheet;
and 4, step 4: alternately vulcanizing the multiple magnetorheological elastomer thin plates and the multiple magnetic-conductive steel plates to prepare a magnetorheological elastomer stack;
and 5: bonding the lower permanent magnet and the magnetorheological elastomer stack, pouring a lead core at the center of the magnetorheological elastomer stack, and bonding the upper permanent magnet after the lead core reaches the strength to form an annular stress assembly;
step 6: wrapping a coil at the periphery of the annular stress assembly, respectively bonding the annular stress assembly with a middle connecting plate and a lower connecting plate, bonding an air rubber spring and a composite spring at a corresponding position above the middle connecting plate, extending an insulating sleeve to the lower connecting plate through a preformed hole in the middle connecting plate, finally bonding an upper connecting plate, and simultaneously fixedly bonding the contact position of the lower connecting plate and the insulating sleeve to finish the manufacture of the multidimensional seismic reduction and isolation bridge bearing;
and 7: removing floating sand on the top surface of the pad stone of the abutment, and cleaning, leveling and removing oil stains on the surface;
and 8: marking a central line of a support position on a support cushion according to a design drawing, and marking a cross central line on the multi-dimensional seismic reduction and isolation support;
and step 9: and (4) placing the assembled multidimensional seismic reduction and isolation support on a support cushion stone, so that the center line of the support coincides with the center of the designed position on the abutment, and the support installation is completed.
The utility model discloses a multidimensional vibration reduction and isolation intelligent bridge bearing does not need the outside to provide the energy by upper portion spring structure and following annular atress component combined work under normal environment. Due to the existence of the upper permanent magnet 6 and the lower permanent magnet 7, the magnetorheological elastomer stack works in a larger magnetic field, so that the support has high horizontal rigidity and can ensure the stability of the upper building structure. When an earthquake comes, the spring structure at the upper part can prevent the input of vertical earthquake waves, the reverse magnetic field is generated at the lower part in the magnetorheological elastomer stack through the electromagnetic coil to counteract the magnetic field generated by the permanent magnet, at the moment, the magnetorheological elastomer works in a lower magnetic field environment, and the horizontal rigidity of the support is lower, so that the aim of protecting the upper building is fulfilled.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the spirit of the present invention, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a multidimensional seismic isolation intelligent bridge bearing which characterized in that includes: the coil-type power transmission device comprises an upper connecting plate, a middle connecting plate and a lower connecting plate, wherein an annular stress assembly is fixedly arranged between the middle connecting plate and the lower connecting plate, and a coil is wound outside the annular stress assembly; the annular stress assembly comprises an upper permanent magnet, a lower permanent magnet and a magnetorheological elastomer stack, the upper permanent magnet and the lower permanent magnet are respectively arranged at the upper end and the lower end of the magnetorheological elastomer stack, and the magnetorheological elastomer stack is formed by alternately vulcanizing a plurality of magnetorheological elastomer thin plates and a plurality of magnetic steel plates; the center parts of the upper connecting plate and the middle connecting plate are connected through air rubber spring supports, and the peripheries of the upper connecting plate and the middle connecting plate are connected through a plurality of composite spring supports; the bridge support is wrapped by an insulating sleeve.
2. The multidimensional seismic isolation and reduction intelligent bridge bearing of claim 1, wherein a sensor for detecting bridge vibration is mounted on the middle connecting plate, the sensor is connected with a control module, and the control module controls a power supply module to supply power to a coil according to a detection signal of the sensor so as to change the rigidity and damping of the bridge bearing.
3. The multi-dimensional seismic mitigation and isolation smart bridge bearer according to claim 1, wherein a lead core is cast through a center position of the magnetorheological elastomer stack.
4. The intelligent bridge bearing for multi-dimensional seismic isolation and reduction according to claim 1, wherein the air rubber spring is made of rubber and is internally filled with compressed air.
5. The intelligent bridge bearing of claim 1, wherein the composite spring is formed by wrapping a layer of rubber material around the metal coil spring and performing composite vulcanization.
6. The intelligent bridge bearing of claim 1, wherein the upper connecting plate is made of a magnetorheological elastomer, and the middle connecting plate and the lower connecting plate are made of materials with good magnetic permeability.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921090688.1U CN210238273U (en) | 2019-07-12 | 2019-07-12 | Multidimensional seismic isolation and reduction intelligent bridge bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921090688.1U CN210238273U (en) | 2019-07-12 | 2019-07-12 | Multidimensional seismic isolation and reduction intelligent bridge bearing |
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| CN210238273U true CN210238273U (en) | 2020-04-03 |
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| CN201921090688.1U Expired - Fee Related CN210238273U (en) | 2019-07-12 | 2019-07-12 | Multidimensional seismic isolation and reduction intelligent bridge bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344321A (en) * | 2019-07-12 | 2019-10-18 | 沈阳建筑大学 | A kind of multidimensional subtracts shock insulation smart bridge support and its construction method |
| CN115182476A (en) * | 2022-08-11 | 2022-10-14 | 安徽工业大学 | Three-dimensional shock isolation system capable of achieving elastic limiting at ordinary times and unilateral limiting during working |
-
2019
- 2019-07-12 CN CN201921090688.1U patent/CN210238273U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344321A (en) * | 2019-07-12 | 2019-10-18 | 沈阳建筑大学 | A kind of multidimensional subtracts shock insulation smart bridge support and its construction method |
| CN110344321B (en) * | 2019-07-12 | 2023-12-15 | 沈阳建筑大学 | Multidimensional seismic reduction and isolation intelligent bridge support and construction method thereof |
| CN115182476A (en) * | 2022-08-11 | 2022-10-14 | 安徽工业大学 | Three-dimensional shock isolation system capable of achieving elastic limiting at ordinary times and unilateral limiting during working |
| CN115182476B (en) * | 2022-08-11 | 2024-03-29 | 安徽工业大学 | Three-dimensional vibration isolation system capable of achieving elastic limiting at ordinary times and unilateral limiting during working |
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