CN107605061A - Inclined-plane guide type subtracts shock insulation Self-resetting bearing - Google Patents
Inclined-plane guide type subtracts shock insulation Self-resetting bearing Download PDFInfo
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- CN107605061A CN107605061A CN201710786604.7A CN201710786604A CN107605061A CN 107605061 A CN107605061 A CN 107605061A CN 201710786604 A CN201710786604 A CN 201710786604A CN 107605061 A CN107605061 A CN 107605061A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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Abstract
The invention belongs to technical field of bridge, discloses inclined-plane guide type and subtracts shock insulation Self-resetting bearing.It is mainly characterized in that：Lower crossed ramp plate is provided with below lower support plate, first inclined-plane of three or more than three in opposite direction of adjacent inclined is divided into the bottom surface of lower support plate, all the first adjacent inclined-plane joinings in lower support plate bottom surface are on the same axis；The upper surface of lower crossed ramp plate is provided with second inclined-plane corresponding with the first inclined-plane of lower support plate bottom surface, the gradient on the second adjacent inclined-plane is in opposite direction, the inclined direction on the second alternate inclined-plane is identical, and second inclined-plane the inclined direction size and Orientation in gradient direction the first inclined-plane corresponding with lower support plate bottom surface it is consistent, lower all the second adjacent inclined-plane joinings in crossed ramp plate upper surface are on the same axis.Top-out forms the horizontal component along inclined-plane to the pressure of bearing on inclined-plane between lower support plate and lower crossed ramp plate, put forward restoring force for bearing reset itself, bearing returns back to original state completely automatically.
Description
Technical field
The invention belongs to bearing technical field, more particularly to inclined-plane guide type to subtract shock insulation Self-resetting bearing.
Background technology
Present global earthquakes take place frequently, and are adopted extensively using vibration absorption and isolation support with buildings such as bridge, aqueduct, houses
With, subtract shock insulation displacement accordingly because vibration absorption and isolation support plays to subtract function of shock insulation and need, so vibration absorption and isolation support in earthquake centre all
It can be subjected to displacement or deform, can not all be resetted completely after these displacements or deformation shake so that building can not return to after shake
State before shake, the use of building, especially post-earthquake emergency response passage are had a strong impact on.Part-structure must be complete after requiring shake simultaneously
All reset could use, such as hydraulic engineering aqueduct, it is impossible to and reset completely, the antipriming failure of aqueduct junction can be caused, so as to
Lead to not water delivery, structural failure.The endless all reset of other buildings can also change the distribution of building internal force, or even surmount
Intrinsic controlled range, it is the normal service of building, and tackles next earthquake, brings very big influence.
The existing vibration absorption and isolation support for possessing runback bit function typically has following several：First, laminated rubber damping bearing,
Be using bearing material of main part rubber viscoelastic property, under action of horizontal seismic, occurred level deform when absorb and
Dissipation seismic energy, so as to reach the purpose for subtracting shock insulation.The shortcomings that aging and aged properties change being present greatly due to rubber, it makes
Approved with the life-span person of being not designed；Simultaneously also there is creep in rubber, and rubber support deforms for a long time, lead to not complete
Portion resets；Second, double curved surface support（Also it is friction pendulum support）, it is a kind of using sphere swing principle, using gravity in sphere
The restoring force that provides of component realize and reset, it is maximum in maximum its restoring force of position of swing angle, zero swing angle position its
Restoring force is zero, and this phenomenon is that sphere swings intrinsic phenomenon, so as to cause double curved surface support close to zero swing position
Restoring force is less than frictional force, so as to realize complete Self-resetting；Double curved surface support is swung using sphere, and its hunting period is solid
Fixed cycle, when earthquake occurs, it is possible to can be overlapped with the seismic shock cycle, so as to amplify geological process, subtract shock insulation ability and pay no attention to
Think.Above two possesses the vibration absorption and isolation support of runback bit function when realizing damping, plane of its direction of displacement in horizontal displacement
Interior no constraint, it is possible to which occurring that displacement is excessive causes to fall beam.
The content of the invention
Present invention solves the technical problem that it can be resetted completely after just there is provided a kind of shake, the inclined-plane that damping and isolation effect is good
Guide type subtracts shock insulation Self-resetting bearing.
In order to solve the above technical problems, inclined-plane guide type of the present invention subtract technical scheme that shock insulation Self-resetting bearing uses for：
Including with upper bracket plate component, the first plane slide plate, core, spherical slide plate and lower support plate, the lower support plate bottom surface point
Into spaced the first inclined-plane and the second inclined-plane, all inclined directions in first inclined-plane are identical, and all described second is oblique
The inclined direction in face is identical, and the inclined direction in the first inclined-plane is inclined in opposite direction with second inclined-plane, owns
The first adjacent inclined-plane and the second inclined-plane joining are on the same axis；First inclined-plane and the second inclined-plane are in two inclined-plane intersection axis
Both lateral sides form strip groove and the convex stalk of upper bar shaped；Lower crossed ramp plate is provided with below the lower support plate, it is described
Lower crossed ramp plate upper surface is provided with corresponding with first inclined-plane and the second inclined-plane the 3rd inclined-plane and the 4th inclined-plane, owns
The inclined direction in 3rd inclined-plane is identical, and the inclined direction on all 4th inclined-planes is identical, and the 3rd inclined-plane tilts
Direction and the 4th inclined-plane it is inclined in opposite direction, all the 3rd adjacent inclined-planes and the 4th inclined-plane joining are same
On axis；3rd inclined-plane and the 4th inclined-plane form lower strip groove and the lower convex stalk of bar shaped in two inclined-plane intersection axis both lateral sides；
The convex stalk of lower bar shaped of the upper strip groove, the convex stalk of upper bar shaped and the 3rd described inclined-plane composition that are formed on the first described inclined-plane,
Lower strip groove is engaged；Upper strip groove, the convex stalk of upper bar shaped and the 4th described inclined-plane formed on the second described inclined-plane
The convex stalk of lower bar shaped, the lower strip groove of composition are engaged.
Its additional technical feature is：
Wearing plate is provided with below first inclined-plane and the second inclined-plane, is set above the 3rd inclined-plane and the 4th inclined-plane
There is stainless steel plate, the wearing plate and stainless steel plate form friction pair；
The wear-resisting board slot below first inclined-plane and the second inclined-plane, the wearing plate are embedded in wear-resisting board slot, described stainless
Steel plate is welded on above the 3rd inclined-plane and the 4th inclined-plane；
The angle α on first inclined-plane and horizontal plane meets below equation：∣Sinα∣>∣ Cos α ∣ f, wherein , ∣ Sin α ∣ are angle α
Sinusoidal absolute value；∣ Cos α ∣ are the absolute value of angle α cosine；F be the first inclined-plane and the 3rd inclined-plane or the second inclined-plane and
Coefficient of friction between 4th inclined-plane.
Inclined-plane guide type provided by the present invention subtracts shock insulation Self-resetting bearing compared with prior art, has advantages below：
First, due to including with upper bracket plate component, the first plane slide plate, core, spherical slide plate and lower support plate, the undersetting
Plate bottom surface is divided into spaced the first inclined-plane and the second inclined-plane, and all inclined directions in first inclined-plane are identical, Suo Yousuo
State that the inclined direction on the second inclined-plane is identical, the inclined direction phase in the inclined direction in the first inclined-plane and second inclined-plane
Instead, all the first adjacent inclined-planes and the second inclined-plane joining be on the same axis；First inclined-plane and the second inclined-plane are on two inclined-planes
Intersection axis both lateral sides form strip groove and the convex stalk of upper bar shaped；Lower crossed ramp is provided with below the lower support plate
Plate, the lower crossed ramp plate upper surface are provided with the 3rd inclined-plane corresponding with first inclined-plane and the second inclined-plane and the 4th oblique
Face, the inclined direction in all 3rd inclined-planes is identical, and the inclined direction on all 4th inclined-planes is identical, and the described 3rd is oblique
The inclined direction in face inclined in opposite direction, all the 3rd adjacent inclined-planes and the 4th inclined-plane joining with the 4th inclined-plane
On the same axis；3rd inclined-plane and the 4th inclined-plane form lower strip groove and lower bar shaped in two inclined-plane intersection axis both lateral sides
Convex stalk；The lower bar shaped that upper strip groove, the convex stalk of upper bar shaped formed on the first described inclined-plane forms with the 3rd described inclined-plane
Convex stalk, lower strip groove are engaged；Upper strip groove, the convex stalk of upper bar shaped and the described the 4th formed on the second described inclined-plane
The convex stalk of lower bar shaped, the lower strip groove of inclined-plane composition are engaged, and under normal conditions, lower support plate is located at lower crossed ramp plate
Medium position, the 3rd contact of incline plane of the first inclined-plane of lower support plate and corresponding lower crossed ramp plate, the second of lower support plate
4th contact of incline plane of inclined-plane and corresponding lower crossed ramp plate, in the presence of earthquake or other external force occurs, when bearing by
When arriving active force to the left, the first inclined-plane the 3rd inclined-plane corresponding to is relative to be slid, the second inclined-plane of lower support plate with it is right
4th inclined-plane of the lower crossed ramp plate answered leaves, and the first inclined-plane produces sliding friction, friction consumption with the 3rd corresponding inclined-plane
Can, realization subtracts shock insulation, and in moving process, is become between lower support plate and lower crossed ramp plate by two crossed ramp contacts
Into pure contact of incline plane, upper building forms edge to the pressure of bearing on inclined-plane between lower support plate and lower crossed ramp plate
Slope level component, restoring force is provided for bearing reset itself, bearing replys original state completely automatically, and the size of restoring force is not
Change with support displacement and change, eliminate bearing and diminish the phenomenon that can not reset completely swinging zero return power, equally, when
When bearing is by active force to the right, the second inclined-plane the 4th inclined-plane corresponding to is relative to be slid, and the first of lower support plate is oblique
Face is left with the 3rd inclined-plane of corresponding lower crossed ramp plate, equally restoring force can be provided for bearing reset itself, described
The upper strip groove and convex stalk of lower bar shaped, after the convex stalk of upper bar shaped and lower strip groove coordinates, lower support plate and lower crossed ramp plate
Along upper strip groove to or upper bar shaped it is convex obstruct to can guiding movement, on horizontal strip groove or upper bar shaped it is convex stalk direction it is not removable
It is dynamic, the power in this direction can be resisted, inclined-plane guide type is subtracted shock insulation Self-resetting bearing and manufactured using steel, eliminates the macromolecules such as rubber
Influence of the material creep to reset；Second, due to being provided with wearing plate below first inclined-plane and the second inclined-plane, described
Stainless steel plate is provided with above 3rd inclined-plane and the 4th inclined-plane, the wearing plate and stainless steel plate form friction pair, improve branch
The service life of seat, while the frictional force between lower support plate and lower crossed ramp plate is reduced, reset effect is more preferably；Third,
It is described stainless because wear-resisting board slot, the wearing plate are embedded in wear-resisting board slot below first inclined-plane and the second inclined-plane
Steel plate is welded on above the 3rd inclined-plane and the 4th inclined-plane, and processing and construction are more convenient；Fourth, due to first inclined-plane
Meet below equation with the angle α of horizontal plane：∣Sinα∣>∣ Cos α ∣ f, wherein , ∣ Sin α ∣ are angle α sinusoidal absolute value；∣
Cos α ∣ are the absolute value of angle α cosine；F rubbing between the first inclined-plane and the 3rd inclined-plane or the second inclined-plane and the 4th inclined-plane
Coefficient is wiped, ensures that bearing can reach complete Self-resetting.
Brief description of the drawings
Fig. 1 is the structural representation that inclined-plane guide type of the present invention subtracts shock insulation Self-resetting bearing；
Fig. 2 is the structural representation of lower support plate；
Fig. 3 is Fig. 2 A-A views；
Fig. 4 is Fig. 2 B-B views；
Fig. 5 is the structural representation of lower crossed ramp plate；
Fig. 6 is Fig. 5 C-C views；
Fig. 7 is Fig. 2 D-D views.
Embodiment
Inclined-plane guide type of the present invention is subtracted with reference to the accompanying drawings and detailed description shock insulation Self-resetting bearing structure and
Use principle is described in further details.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, inclined-plane guide type of the present invention subtracts shock insulation Self-resetting bearing
Structural representation, inclined-plane guide type of the present invention subtract shock insulation Self-resetting bearing due to including with upper bracket plate component 1, the first plane
Slide plate 2, core 3, spherical slide plate 10 and lower support plate 5, the bottom surface of lower support plate 5 are divided into the first spaced inclined-plane 6 and second
Inclined-plane 7, the second inclined-plane 7 are two, and the first inclined-plane 6 is one, and the first inclined-plane 6 is between two the second inclined-planes 7, certain first
The number on the inclined-plane 7 of inclined-plane 6 and second can be set as needed, and the first inclined-plane 6 and the second inclined-plane 7 are spaced.All first
6 inclined direction of inclined-plane is identical, and the inclined direction on all second inclined-planes 7 is identical, the inclined direction 6 in the first inclined-plane and described the
Two inclined-planes 7 it is inclined in opposite direction, all the first adjacent inclined-planes 6 and the joining of the second inclined-plane 7 are on the same axis；First
The inclined-plane 7 of inclined-plane 6 and second forms strip groove 61,71 and the convex stalk 62,72 of upper bar shaped in two inclined-plane intersection axis both lateral sides；
Lower crossed ramp plate 4 is provided with below lower support plate 5, the lower upper surface of crossed ramp plate 4 is provided with and the first inclined-plane 6 and second
3rd inclined-plane 8 and the 4th inclined-plane 9 corresponding to inclined-plane 7, all 3rd inclined-plane, 8 inclined directions are identical, and all 4th inclined-planes 9 incline
Oblique direction is identical, 8 inclined direction of the 3rd inclined-plane and the 4th inclined-plane 9 it is inclined in opposite direction, all adjacent three is oblique
Face 8 and the joining of the 4th inclined-plane 9 are on the same axis；3rd inclined-plane 8 and the 4th inclined-plane 9 are in two inclined-plane intersection axis both lateral sides
Form lower strip groove 81,91 and the convex stalk 82,92 of lower bar shaped；Upper strip groove 61, the convex stalk of upper bar shaped formed on first inclined-plane 6
62 stalks 82 convex with the lower bar shaped of the 3rd inclined-plane 8 composition, lower strip groove 81 are engaged；The upper bar shaped formed on second inclined-plane 7 is recessed
Groove 71, the convex stalk 72 of upper bar shaped stalk 91 convex with the lower bar shaped of the 4th inclined-plane 9 composition, lower strip groove 92 are engaged.
Under normal conditions, lower support plate 5 is located at the lower medium position of crossed ramp plate 4, the first inclined-plane of lower support plate 5
6 contact with the 3rd inclined-plane 8 of corresponding lower crossed ramp plate 4, the second inclined-plane 7 and the corresponding lower crossed ramp of lower support plate 5
4th inclined-plane 9 of plate 4 contacts.In the presence of earthquake or other external force occurs, when bearing is by active force to the left, first
Inclined-plane 6 slides along corresponding 3rd inclined-plane 8 is relative, the second inclined-plane 7 of lower support plate 5 and corresponding lower crossed ramp plate 4
The 4th inclined-plane 9 leave, the first inclined-plane 6 produces sliding friction, friction energy-dissipating with the 3rd corresponding inclined-plane 8, and realization subtracts shock insulation,
And become pure inclined-plane by two crossed ramp contacts in moving process, between lower support plate 5 and lower crossed ramp plate 4 and connect
Touch, upper building is formed along slope level point to the pressure of bearing on inclined-plane between lower support plate and lower crossed ramp plate
Power, restoring force is provided for bearing reset itself, bearing replys original state completely automatically, and the size of restoring force is not with support displacement
Change and change, eliminate bearing diminishes the phenomenon that can not reset completely in swing zero return power, equally, when bearing by
During right active force, the second inclined-plane 7 slides along corresponding 4th inclined-plane 9 is relative, the first inclined-plane 6 of lower support plate 5 with it is right
3rd inclined-plane 8 of the lower crossed ramp plate answered leaves, and equally can provide restoring force for bearing reset itself.In upper strip groove
61st, 71 and lower bar shaped it is convex stalk 82,92 with upper bar shaped it is convex stalk 62,72 and lower strip groove 81,91 coordinate after, lower support plate 5 with
Crossed ramp plate 4 along upper strip groove 61,71 directions or upper bar shaped it is convex stalk 62,72 directions can guiding movement, the bar shaped on horizontal
62,72 directions of the convex stalk of the bar shaped of groove 61,71 or upper are irremovable, can resist the power in this direction.Inclined-plane guide type subtracts shock insulation runback
Position bearing is manufactured using steel, eliminates influence of the rubber Polymer material creep to reset.
Wearing plate 11 is provided with below the first inclined-plane 6 and the second inclined-plane 7, is set above the 3rd inclined-plane 8 and the 4th inclined-plane 9
Stainless steel plate 12 is equipped with, wearing plate 11 and stainless steel plate 12 form friction pair, improve the service life of bearing, reduce simultaneously
Frictional force between lower support plate and lower crossed ramp plate, reset effect is more preferably.
The wear-resisting board slot 13 below the first inclined-plane 6 and the second inclined-plane 7, wearing plate 11 is embedded in wear-resisting board slot 13, stainless
Steel plate 12 is welded on the top on the 3rd inclined-plane 8 and the 4th inclined-plane 9, and processing and construction are more convenient.
The angle α on the first inclined-plane 6 and horizontal plane meets below equation：∣Sinα∣>∣ Cos α ∣ f, wherein , ∣ Sin α ∣ are angle
α sinusoidal absolute value；∣ Cos α ∣ are the absolute value of angle α cosine；F is the first inclined-plane 6 and the 3rd inclined-plane 8 or the second inclined-plane
7 and the 4th coefficient of friction between inclined-plane 9, ensure that bearing can reach complete Self-resetting.
Protection scope of the present invention is not limited solely to above-described embodiment, if structure and inclined-plane guide type of the present invention subtract every
It is identical to shake Self-resetting seat structure, just falls in the scope of protection of the invention.
Claims (4)
1. inclined-plane guide type subtracts shock insulation Self-resetting bearing, including with upper bracket plate component, the first plane slide plate, core, sphere
Slide plate and lower support plate, it is characterised in that：
The lower support plate bottom surface is divided into spaced the first inclined-plane and the second inclined-plane, all inclined sides in first inclined-plane
To identical, the inclined direction on all second inclined-planes is identical, the inclined direction in the first inclined-plane and second inclined-plane
It is inclined in opposite direction, all the first adjacent inclined-planes and the second inclined-plane joining are on the same axis；First inclined-plane and
Two inclined-planes form strip groove and the convex stalk of upper bar shaped in two inclined-plane intersection axis both lateral sides；
Lower crossed ramp plate is provided with below the lower support plate, the lower crossed ramp plate upper surface is provided with and described
3rd inclined-plane and the 4th inclined-plane corresponding to one inclined-plane and the second inclined-plane, the inclined direction in all 3rd inclined-planes is identical, owns
The inclined direction on the 4th inclined-plane is identical, the inclined direction in the inclined direction in the 3rd inclined-plane and the 4th inclined-plane
On the contrary, all the 3rd adjacent inclined-planes and the 4th inclined-plane joining are on the same axis；3rd inclined-plane and the 4th inclined-plane are oblique two
Face intersection axis both lateral sides form lower strip groove and the lower convex stalk of bar shaped；
The upper strip groove that is formed on the first described inclined-plane, the lower bar shaped of the convex stalk of upper bar shaped and described the 3rd inclined-plane composition are convex
Stalk, lower strip groove are engaged；Upper strip groove, the convex stalk of upper bar shaped formed on the second described inclined-plane is oblique with described the 4th
The convex stalk of lower bar shaped, the lower strip groove of face composition are engaged.
2. inclined-plane guide type according to claim 1 subtracts shock insulation Self-resetting bearing, it is characterised in that：On first inclined-plane
Second inclined-plane lower section is provided with wearing plate, stainless steel plate is provided with above the 3rd inclined-plane and the 4th inclined-plane, it is described resistance to
Nog plate and stainless steel plate form friction pair.
3. inclined-plane guide type according to claim 2 subtracts shock insulation Self-resetting bearing, it is characterised in that：On first inclined-plane
It is embedded in wear-resisting board slot, the wearing plate below the second inclined-plane in wear-resisting board slot, the stainless steel plate is welded on the described 3rd
Above inclined-plane and the 4th inclined-plane.
4. the inclined-plane guide type according to claim 1,2 or 3 subtracts shock insulation Self-resetting bearing, it is characterised in that：Described first
The angle α of inclined-plane and horizontal plane meets below equation：∣Sinα∣>∣ Cos α ∣ f, wherein , ∣ Sin α ∣ are the sinusoidal absolute of angle α
Zhi , ∣ Cos α ∣ are the absolute value of angle α cosine, and f is between the first inclined-plane and the 3rd inclined-plane or the second inclined-plane and the 4th inclined-plane
Coefficient of friction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710786604.7A CN107605061B (en) | 2017-09-04 | 2017-09-04 | Inclined plane guiding type shock-absorbing and isolating self-resetting support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710786604.7A CN107605061B (en) | 2017-09-04 | 2017-09-04 | Inclined plane guiding type shock-absorbing and isolating self-resetting support |
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| Publication Number | Publication Date |
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| CN107605061A true CN107605061A (en) | 2018-01-19 |
| CN107605061B CN107605061B (en) | 2023-05-05 |
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| CN201710786604.7A Active CN107605061B (en) | 2017-09-04 | 2017-09-04 | Inclined plane guiding type shock-absorbing and isolating self-resetting support |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826333A (en) * | 2019-03-01 | 2019-05-31 | 北京科技大学 | A kind of frcition damper of achievable variable damping power output |
| CN112459277A (en) * | 2020-11-17 | 2021-03-09 | 长江师范学院 | Building shock absorption method based on inclined plane matching conversion energy dissipation principle |
| CN112854025A (en) * | 2021-01-13 | 2021-05-28 | 中铁九局集团有限公司 | Construction method for treating corner overrun defect of high-speed railway bridge support |
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| CN207110109U (en) * | 2017-09-04 | 2018-03-16 | 丰泽工程橡胶科技开发股份有限公司 | Inclined-plane guide type subtracts shock insulation Self-resetting bearing |
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| EP0439272A2 (en) * | 1990-01-20 | 1991-07-31 | Sumitomo Gomu Kogyo Kabushiki Kaisha | Vibration-proofing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826333A (en) * | 2019-03-01 | 2019-05-31 | 北京科技大学 | A kind of frcition damper of achievable variable damping power output |
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| CN112459277A (en) * | 2020-11-17 | 2021-03-09 | 长江师范学院 | Building shock absorption method based on inclined plane matching conversion energy dissipation principle |
| CN112854025A (en) * | 2021-01-13 | 2021-05-28 | 中铁九局集团有限公司 | Construction method for treating corner overrun defect of high-speed railway bridge support |
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|---|---|
| CN107605061B (en) | 2023-05-05 |
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Address after: 053000 rubber and plastics Road 15, north industrial base, Hengshui Economic Development Zone, Hebei Applicant after: FENGZE INTELLIGENT EQUIPMENT Co.,Ltd. Applicant after: CHANGJIANG SURVEY PLANNING DESIGN AND RESEARCH Co.,Ltd. Address before: 053000 rubber and plastics Road 15, north industrial base, Hengshui Economic Development Zone, Hebei Applicant before: FENGZE ENGINEERING RUBBER S&T DEVELOPMENT Co.,Ltd. Applicant before: CHANGJIANG SURVEY PLANNING DESIGN AND RESEARCH Co.,Ltd. |
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