CN114277953A - Viscoelastic damper with adjustable pre-stress - Google Patents
Viscoelastic damper with adjustable pre-stress Download PDFInfo
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- CN114277953A CN114277953A CN202210046223.6A CN202210046223A CN114277953A CN 114277953 A CN114277953 A CN 114277953A CN 202210046223 A CN202210046223 A CN 202210046223A CN 114277953 A CN114277953 A CN 114277953A
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- viscoelastic damper
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- 238000005265 energy consumption Methods 0.000 claims abstract description 11
- 239000000017 hydrogel Substances 0.000 claims abstract description 7
- 239000002905 metal composite material Substances 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 62
- 239000010959 steel Substances 0.000 claims description 62
- 239000000463 material Substances 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000000806 elastomer Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 3
- 230000000452 restraining effect Effects 0.000 claims description 2
- 238000013016 damping Methods 0.000 abstract description 17
- 238000010521 absorption reaction Methods 0.000 abstract description 9
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 8
- 230000035939 shock Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000009418 renovation Methods 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000003190 viscoelastic substance Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Abstract
The invention discloses a viscoelastic damper with adjustable pre-stress, belonging to the technical field of structural shock absorption. The main body comprises a constraint unit, an energy consumption unit and a connection unit. The energy consumption unit is made of hydrogel/porous metal composite materials, vibration is absorbed by the resistance force with hysteresis characteristics generated by shearing deformation, and the effect is obvious. The tightness degree of the disc spring is controlled through the adjusting bolt to provide different pretightening forces, so that the energy dissipation and shock absorption effects of the viscoelastic damper are changed, the structural vibration caused by earthquake and wind vibration can be obviously reduced, and the disc spring damping device is more economical. The invention has good damping effect, simple structure, convenient installation and easy replacement under heavy earthquake, is suitable for various applications from new construction to the renovation of the existing buildings, and can realize high quality and low cost by mass production of high-quality industrial products and standardized systems.
Description
Technical Field
The invention relates to the field of structural shock absorption in civil engineering, in particular to a viscoelastic damper with adjustable pre-stress.
Background
Earthquake is one of the main natural disasters threatening the safety of major engineering structures, so the structure shock absorption control becomes an effective measure for the civil engineering disaster prevention and reduction work.
With the development of economy in China and the increasing innovation of the neighborhood of each industry, the earthquake-proof and disaster-reduction technology of the structure is developed at a rapid pace, the traditional method simply depends on the damage of structural components to resist the adverse load action outside, and the technology gradually develops to the passive energy-dissipation and shock-absorption technology and the active, semi-active and intelligent control technology, wherein the application of the passive energy-dissipation and shock-absorption theory and technology leads the building structure to have the characteristics of strong energy-dissipation and shock-absorption functions, stable performance, high cost performance and the like, so that the passive control system is widely researched and applied internationally, and the common passive control system at present has basic shock insulation, energy dissipation and shock absorption and the like. The energy dissipation and shock absorption device can provide certain rigidity and additional damping for the structure under the action of small shock, so that the dynamic response of the structure is reduced, and the whole structure is in an elastic state; when the earthquake occurs, the energy dissipation component enters a plastic stage earlier than the main structure to consume the energy input into the building by the earthquake, and simultaneously, the damping ratio of the structure is increased to bear most of the earthquake energy in the earthquake process. The viscoelastic damper is a typical energy dissipation and damping device, is simple to mount, convenient to manufacture and excellent in performance, and has wide engineering application prospect in vibration control along with the appearance of more and more viscoelastic materials with excellent performance.
The viscoelastic damper is a speed-dependent damper, and combines a viscoelastic damping material and a restraining steel plate in a sandwich mode to provide additional rigidity and additional damping for a structure, and energy is dissipated through shear hysteresis deformation of the viscoelastic material. The requirements of different energy-consuming and shock-absorbing structures on the performance of the viscoelastic damper are different, and in a certain environment temperature, the energy-consuming and shock-absorbing structures need the viscoelastic damper to have obvious damping performance in a low-frequency vibration range on one hand so as to consume the energy of an external vibration input structure; and on the other hand needs viscoelastic damper can provide different elastic restoring force along with the change of structure displacement to satisfy the demand of power consumption shock-absorbing structure to additional rigidity, this needs to produce a large amount of different pre-compressive stress viscoelastic dampers of the same type, has improved manufacturing cost greatly.
The viscoelastic damping material, an energy-consuming component of a viscoelastic damper, is a polymer characterized by a viscous liquid and an elastic solid. Under the action of external excitation, mechanical energy applied to an elastic component is stored, and after external force is removed, the stored mechanical energy is released and deformed and recovered; mechanical energy acting on viscous components cannot be released, the mechanical energy is converted into heat energy to be dissipated, deformation cannot be recovered, the conversion and dissipation of the energy reduce the dynamic response of the structure, and in addition, the performance of the viscoelastic damping material is greatly influenced by the ambient temperature, the strain amplitude and the loading frequency, so that the application of the viscoelastic damper in some anti-seismic engineering with large ambient temperature difference, large deformation and high additional rigidity requirements is limited.
Disclosure of Invention
In order to solve the technical problems of high production cost, small storage rigidity and the like of the common viscoelastic damper, the invention provides the viscoelastic damper with adjustable pre-stress, which is widely applicable and excellent in performance. The device can be applied to various applications from new construction to existing building renovation, realizes high quality and low cost by large-scale production of high-quality industrial products and standardized systems, can control various vibrations caused by strong wind and earthquake to about six to seven percent, and is more economical compared with the installation of separate damping devices for earthquake and wind vibration.
The technical scheme adopted by the invention for solving the technical problems is as follows: a viscoelastic damper with adjustable pre-stress is composed of a constraint unit, an energy consumption unit and a connection unit, wherein the constraint unit, the energy consumption unit and the connection unit are all made of Q235, Q345 and other steel materials.
The constraint unit consists of an upper constraint steel plate, a lower constraint steel plate and a middle steel plate; the energy consumption unit consists of an upper viscoelastic body and a lower viscoelastic body which are the same; the connecting unit is placed between the upper restraint steel plate and the lower restraint steel plate and is connected with the upper restraint plate and the lower restraint plate through the fixing screw and the screw cap, the base plates are placed between every two connecting units respectively, the thickness of each base plate is the same as that of each sticky elastomer, and the connecting unit is provided with a pin shaft hole and is connected with an external structure through a pin shaft.
The pre-pressure screw rods are connected with the upper restraint steel plate, the lower restraint steel plate, the middle steel plate and the sticky elastic body in series and limited by the compression ring, the disc spring, the screw cap and the base plate, and the pre-pressure screw rods are uniformly and symmetrically arranged on the restraint steel plate. The middle steel plate is provided with an oval long hole at the position of the pre-pressure screw, and the outer side of the damper is provided with a pin shaft hole which is connected with an external structure through a pin shaft.
The viscoelastic body is made of hydrogel/porous metal composite material, namely the composite material obtained by filling hydrogel in porous metal, the strength, the rigidity and the damping performance of the composite material are improved, and the filling of other proper viscoelastic materials in the porous metal becomes an important direction for researching high-damping materials in the future. The sticky elastic body is respectively bonded and fixed with the upper constraint steel plate, the lower constraint steel plate and the middle steel plate, and an oval long hole which is the same as the middle steel plate is arranged at the prestressed screw rod.
The viscoelastic damper with adjustable high-quality pre-stress is produced in a standardized production mode on a large scale, the tightness degree of the spring is controlled by adjusting the bolt before installation, different pre-tightening forces are generated, the viscoelastic damper is installed on corresponding floors and positions according to different pre-stress requirements, and the viscoelastic damper is also favorably applied to some anti-seismic projects with large environment temperature differences, large deformation and high additional rigidity requirements.
Compared with the prior art, the invention has the advantages that: (1) reducing the vibration caused by strong wind and earthquake, and controlling the vibration to be about six to seven percent; (2) the material can be integrated into a new building, can also be integrated into the damping, reinforcing and finishing materials of the existing building, and is suitable for various applications from low-rise buildings to super high-rise buildings; (3) the deployment cost can be reduced by about 40%, and the device is more economical compared with a damping device which is independently installed for earthquake and wind vibration; (4) due to environmental conditions and the like, the performance is not reduced, and therefore maintenance is not needed; even if the earthquake happens, the earthquake-proof wall cannot be damaged, so that the earthquake-proof wall does not need to be replaced; (5) high quality and low cost can be achieved by mass production of high quality industrial products and standardized systems. Therefore, the damping and energy-consuming device has the advantages of high quality, low cost, controllable parameters and excellent energy consumption.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a front view of a viscoelastic damper with adjustable pre-stress;
FIG. 2 is a top view of a viscoelastic damper with adjustable pre-stress;
FIG. 3 is a top view of a middle steel plate of the viscoelastic damper with adjustable pre-stress;
FIG. 4 is a top view of an upper restraint steel plate in the viscoelastic damper with adjustable pre-stress;
FIG. 5 is a top view of a connection unit in the viscoelastic damper with adjustable pre-stress;
FIG. 6 is a top view of a shim plate in a viscoelastic damper with adjustable pre-stress;
FIG. 7 is a cross-sectional view of a disc spring in a viscoelastic damper with adjustable pre-stress;
FIG. 8 is a schematic view of a structure of a middle pressure ring of a viscoelastic damper with adjustable pre-stress.
Wherein: 1. the device comprises an intermediate steel plate, 2, a disc spring, 3, a compression ring, 4, a pre-pressure nut, 5, a lower constraint steel plate, 6, a pre-pressure screw, 7, a bolt backing plate, 8, an upper constraint steel plate, 9, an adhesive elastic body, 10, a fixing nut, 11, a fixing screw, 12, a connecting unit, 13, a backing plate, 14, a pin shaft hole, 15 and an oval long hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1 and 2, a viscoelastic damper with adjustable pre-compressive stress mainly comprises a constraint unit, an energy consumption unit and a connection unit, wherein the constraint unit comprises an upper constraint steel plate, a lower constraint steel plate and a middle steel plate, the energy consumption unit comprises an upper and a lower identical viscoelastic bodies, the connection unit is arranged between the upper constraint steel plate and the lower constraint steel plate and is connected with the upper and the lower constraint plates through a fixing screw and a nut, base plates are respectively arranged between every two of the upper constraint steel plate and the lower constraint steel plate, the thickness of each base plate is identical to that of each viscoelastic body, and the connection unit is provided with a pin shaft hole and is connected with an external structure through a pin shaft; the upper restraint steel plate, the lower restraint steel plate, the middle steel plate and the sticky elastic body are connected in series through the pre-pressure screw rods, and the pre-pressure screw rods are uniformly and symmetrically arranged on the restraint steel plate and limited by the compression ring, the disc spring, the screw cap and the base plate. The middle steel plate is provided with an oval long hole at the pre-pressure screw, and the outer side of the damper is provided with a pin shaft hole which is connected with an external structure through a pin shaft; the adhesive elastomer is made of hydrogel/porous metal composite materials, is respectively bonded and fixed with the upper constraint steel plate, the lower constraint steel plate and the middle steel plate, and is provided with an oval long hole which is the same as the middle steel plate at the position of the prestressed screw. The invention provides a viscoelastic damper with adjustable pre-stress, which comprises the following construction steps:
(1) the middle steel plate (1) is provided with an oval long hole (15) at the pre-pressure screw (6), and a pin shaft hole (14) is arranged at the outer side of the damper; the upper restraint steel plate (8) and the lower restraint steel plate (5) are provided with the same elliptical long hole (15) at corresponding positions, and one end connected with the connecting unit (12) is provided with a bolt hole.
(2) During installation, the upper restraint steel plate (8), the layer of sticky elastomer (9), the middle steel plate (1), the layer of sticky elastomer (9) and the lower restraint steel plate (5) are overlapped in sequence, the oval long holes (15) of the plates correspond to each other and are connected together through the pre-pressure screw (6), and the pre-pressure screw (6) is limited by the pressing ring (3), the disc spring (2), the nut (4) and the backing plate (7).
(3) The viscoelastic body is made of hydrogel/porous metal composite materials, and is respectively bonded and fixed with the upper constraint steel plate, the lower constraint steel plate and the middle steel plate to prevent slippage, and energy consumption is absorbed through shearing deformation under the action of an earthquake.
(4) The connecting unit (12) is arranged between the upper constraint steel plate (8) and the lower constraint steel plate (5), a base plate (13) with the same thickness as that of the sticky elastomer is respectively arranged between every two connecting units, each corresponding bolt hole corresponds to each bolt hole, and the connecting units are connected in series with the nuts (10) through the fixing screws (11).
When the viscoelastic damper with adjustable pre-stress is installed, the bolts are adjusted to control the tightness degree of the springs, so that different pre-stresses are generated, the viscoelastic damper is installed at a required position according to different pre-stress requirements, additional rigidity and additional damping of the structure are provided, and the anti-seismic performance of the structure is enhanced.
Those skilled in the art will readily appreciate that the above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the present invention, and that all other embodiments obtained by those skilled in the art without the use of inventive faculty are within the scope of the present invention.
Claims (5)
1. The utility model provides a viscoelastic damper of prestressing force adjustable which characterized in that: comprises a restraining unit, an energy consumption unit and a connecting unit (12); the restraint unit consists of an upper restraint steel plate (8), a lower restraint steel plate (5) and a middle steel plate (1); the energy consumption unit consists of an upper viscoelastic body (9) and a lower viscoelastic body (9) which are the same.
2. The viscoelastic damper with adjustable pre-stress according to claim 1, wherein: the connecting unit (12) is arranged between the upper restraint steel plate (8) and the lower restraint steel plate (5) and is connected with the screw cap (10) through a fixing screw rod (11), the base plates (13) are arranged between every two connecting units, and the thickness of each base plate (13) is the same as that of the sticky elastomer (9); the connecting unit (12) is provided with a pin shaft hole and is connected with an external structure through a pin shaft.
3. The viscoelastic damper with adjustable pre-stress according to claim 1, wherein: the pre-pressure screw (6) is connected with the upper restraint steel plate (8), the lower restraint steel plate (5), the middle steel plate (1) and the sticky elastomer (9) in series and limited by the press ring (3), the disc spring (2), the screw cap (4) and the backing plate (7), and the pre-pressure screw (6) is uniformly and symmetrically arranged on the restraint steel plate.
4. The viscoelastic damper with adjustable pre-stress according to claim 1, wherein: the middle steel plate (1) is provided with an oval long hole at the pre-pressure screw (6), and a pin shaft hole is arranged on the outer side of the damper and connected with an external structure through a pin shaft.
5. The viscoelastic damper with adjustable pre-stress according to claim 1, wherein: the viscoelastic body (9) is made of hydrogel/porous metal composite material, namely material filled with hydrogel in porous metal. The sticky elastic body (9) is respectively bonded and fixed with the upper constraint steel plate (8), the lower constraint steel plate (5) and the middle steel plate (1), and an oval long hole which is the same as the middle steel plate (1) is formed in the position of the prestressed screw (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210046223.6A CN114277953A (en) | 2022-01-14 | 2022-01-14 | Viscoelastic damper with adjustable pre-stress |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210046223.6A CN114277953A (en) | 2022-01-14 | 2022-01-14 | Viscoelastic damper with adjustable pre-stress |
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| Publication Number | Publication Date |
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| CN114277953A true CN114277953A (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210046223.6A Withdrawn CN114277953A (en) | 2022-01-14 | 2022-01-14 | Viscoelastic damper with adjustable pre-stress |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116180924A (en) * | 2023-03-13 | 2023-05-30 | 同济大学 | Intelligent tuning mass damper based on linear actuator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08193635A (en) * | 1995-01-17 | 1996-07-30 | Nippon Steel Corp | Friction damper device |
| JP2007046722A (en) * | 2005-08-10 | 2007-02-22 | Ohbayashi Corp | Damping device, damping structure building, seismic isolator, and multi-span damping structure |
| JP2009228834A (en) * | 2008-03-24 | 2009-10-08 | Ohbayashi Corp | Damping device |
| US20120260585A1 (en) * | 2009-10-02 | 2012-10-18 | Damptech A/S | Damping system |
| US20140174002A1 (en) * | 2011-07-15 | 2014-06-26 | Imad H. Mualla | Passive damper |
| CN105525698A (en) * | 2016-02-26 | 2016-04-27 | 云南震安减震科技股份有限公司 | Damping force adjustable fireproof viscoelastic damper |
-
2022
- 2022-01-14 CN CN202210046223.6A patent/CN114277953A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08193635A (en) * | 1995-01-17 | 1996-07-30 | Nippon Steel Corp | Friction damper device |
| JP2007046722A (en) * | 2005-08-10 | 2007-02-22 | Ohbayashi Corp | Damping device, damping structure building, seismic isolator, and multi-span damping structure |
| JP2009228834A (en) * | 2008-03-24 | 2009-10-08 | Ohbayashi Corp | Damping device |
| US20120260585A1 (en) * | 2009-10-02 | 2012-10-18 | Damptech A/S | Damping system |
| US20140174002A1 (en) * | 2011-07-15 | 2014-06-26 | Imad H. Mualla | Passive damper |
| CN105525698A (en) * | 2016-02-26 | 2016-04-27 | 云南震安减震科技股份有限公司 | Damping force adjustable fireproof viscoelastic damper |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116180924A (en) * | 2023-03-13 | 2023-05-30 | 同济大学 | Intelligent tuning mass damper based on linear actuator |
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Application publication date: 20220405 |