CN116446266B - Beam falling prevention damping device and beam falling prevention damping system - Google Patents
Beam falling prevention damping device and beam falling prevention damping system Download PDFInfo
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- CN116446266B CN116446266B CN202310449776.0A CN202310449776A CN116446266B CN 116446266 B CN116446266 B CN 116446266B CN 202310449776 A CN202310449776 A CN 202310449776A CN 116446266 B CN116446266 B CN 116446266B
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- 238000013016 damping Methods 0.000 title claims abstract description 89
- 230000002265 prevention Effects 0.000 title claims abstract description 42
- 230000035939 shock Effects 0.000 claims abstract description 54
- 238000009413 insulation Methods 0.000 claims abstract description 24
- 238000006073 displacement reaction Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
- 230000007123 defense Effects 0.000 description 10
- 230000006378 damage Effects 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
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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
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The application provides an anti-falling beam damping device and an anti-falling beam damping system, wherein the anti-falling beam damping device comprises a first support, a second support, an inertial damping component and a inhaul cable, and the first support is suitable for being connected with a bridge; the second support is suitable for being connected with the bridge pier; the inertial damping component is transversely arranged, one end of the inertial damping component is connected with the first support, and the other end of the inertial damping component is connected with the second support; one end of the inhaul cable is connected with the first support, and the other end of the inhaul cable is connected with the second support. The beam falling prevention damping system comprises the beam falling prevention damping device and the shock insulation support, wherein the beam falling prevention damping device is respectively connected with a bridge and a bridge pier; the shock insulation support is arranged between the bridge and the bridge pier, and the upper end and the lower end of the shock insulation support are respectively connected with the bridge and the bridge pier.
Description
Technical Field
The application belongs to the technical field of bridge damping, and particularly relates to a beam falling prevention damping device and a beam falling prevention damping system.
Background
Damping and shock insulation techniques have proven to be an effective approach to improving seismic safety of bridge structures. However, conventional shock absorbing and isolating devices are not effective in preventing bridge drop damage under cross/near fault seismic action. The multiple earthquake damages show that the fault area is easy to generate earthquake damages such as beam falling, support sliding, stop block and expansion joint damage.
Under the action of cross/near fault earthquake, on one hand, the non-uniform ground permanent displacement on two sides of the fracture zone and the long period speed pulse of the cross/near fault earthquake require the shock absorbing and isolating device to have outstanding displacement capability. On the other hand, the inertial kinetic energy and deformation energy caused by the cross/near fault earthquake are much larger than those in the far-field earthquake, and the earthquake reduction and isolation device is required to have larger energy consumption capability.
At present, the beam falling prevention device mainly comprises a guy cable, a stop block, a viscous damper, a mild steel damper and the like. The stay rope and the stop block improve the earthquake resistance of the structure through the redistribution of the internal forces of the structure, but almost have no energy consumption effect under the earthquake effect. The viscous damper utilizes the silicon oil in the cylinder body to be extruded at a high speed to generate damping to dissipate seismic energy, but the cost is high, the pier top arrangement occupies space, and the effect of controlling the relative displacement of the beam pier is limited. The soft steel damper has more damping tenons, utilizes soft steel yielding to dissipate seismic energy, has small single tenons and high quantity requirements, and needs to meet the use requirements of trains on bridge rigidity under normal operation.
Therefore, a novel bridge beam falling prevention technology is developed aiming at the cross/near fault earthquake action so as to meet the requirements of large deformation and high energy consumption of the cross/near fault bridge.
Disclosure of Invention
The embodiment of the application provides a beam falling prevention damping device and a beam falling prevention damping system, and aims to provide a beam falling prevention technology capable of meeting the requirements of large deformation and high energy consumption of a cross/near fault bridge.
In order to achieve the above purpose, the application adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides an anti-beam-falling shock absorber, including:
the first support is suitable for being connected with a bridge;
the second support is suitable for being connected with the bridge pier;
the inertial damping component is transversely arranged, one end of the inertial damping component is connected with the first support, and the other end of the inertial damping component is connected with the second support;
and one end of the inhaul cable is connected with the first support, and the other end of the inhaul cable is connected with the second support.
With reference to the first aspect, in a possible implementation manner of the beam falling prevention damping device provided by the embodiment of the application, the inertial damping component comprises a ball screw, a nut, a sleeve, a flywheel and a damping element, wherein one end of the ball screw is connected with the first support, and the other end of the ball screw extends into the sleeve; the sleeve is connected with the second support; the nut is arranged at one end of the sleeve facing the first support and is in running fit with the sleeve; the flywheel is connected with the nut and is in running fit with the sleeve; the damping element is arranged between the flywheel and the sleeve, connected with the sleeve and attached to the flywheel.
In combination with the first aspect, in a possible implementation manner of the beam falling prevention damping device provided by the embodiment of the application, a first ball joint is arranged at one end, far away from the sleeve, of the ball screw, a second ball joint is arranged at one end, far away from the ball screw, of the sleeve, the first ball joint is connected with the first support and has a degree of freedom of rotation relative to the first support, and the second ball joint is connected with the second support and has a degree of freedom of rotation relative to the second support.
In combination with the first aspect, in a possible implementation manner of the beam falling prevention damping device provided by the embodiment of the application, the first support and the second support each comprise a bottom plate, a mounting plate and a cover plate, the bottom plate is used for being connected with a bridge or a bridge pier, the mounting plate is connected with the bottom plate, the cover plate is connected with the mounting plate, and the first ball joint or the second ball joint is clamped between the mounting plate and the cover plate, so that the degree of freedom of rotation relative to the mounting plate and the cover plate is provided.
With reference to the first aspect, in one possible implementation manner of the beam falling prevention damping device provided by the embodiment of the application, the cable is a high-strength steel cable or a memory alloy cable.
In a second aspect, an embodiment of the present application provides an anti-beam-falling shock absorbing system, which is characterized by comprising:
the anti-falling beam damping device is respectively connected with the bridge and the bridge pier;
the shock insulation support is arranged between the bridge and the pier, and the upper end and the lower end of the shock insulation support are respectively connected with the bridge and the pier.
In combination with the second surface, in one possible implementation manner of the anti-beam falling damping system provided by the embodiment of the application, the anti-beam falling damping device is arranged along the direction in which the beam falling easily occurs to the bridge, and is arranged on one side of the shock insulation support in the direction in which the beam falling easily occurs to the bridge.
In combination with the second face, in one possible implementation of the anti-drop beam shock absorbing system provided by the embodiment of the present application, the maximum allowable displacement of the inertial damping assembly is greater than the maximum allowable shear deformation of the shock isolation mount.
With reference to the second aspect, in a possible implementation manner of the anti-drop beam damping system provided by the embodiment of the present application, the allowable maximum displacement of the inhaul cable is greater than the allowable maximum displacement of the inertial damping assembly.
The beam falling prevention damping device provided by the application has the beneficial effects that: compared with the prior art, the beam falling prevention damping device provided by the application combines the advantages of the inertial device and the inhaul cable limiter, can avoid resonance generated by a bridge structure and speed pulse of cross/near fault earthquake, dissipates earthquake energy, simultaneously controls the relative displacement of beam piers, prevents the beam falling from being damaged, and can play a role in pier-beam connection by inhaul cables, thereby achieving the purpose of beam falling prevention.
The beam falling prevention damping system provided by the application has the beneficial effects that: compared with the prior art, the beam falling prevention damping system provided by the application can realize multiple defense lines and graded destruction, and the pier top shock insulation support provides a first defense line when in earthquake action, and the maximum displacement of the shock insulation support under the first defense line does not exceed the allowable shear deformation of the shock insulation support; the inertial damping component provides a second line of defense, consumes seismic energy during seismic action, adjusts the frequency of the structure and provides rigidity when the shock insulation support is deformed beyond a limit; the inhaul cable provides a third line of defense, plays a role in pier-beam connection after the shock insulation support and the inertial damping component fail, and achieves the purpose of preventing beam falling; through the synergistic effect of the shock insulation support and the beam falling prevention damping device, the goal of 'small and medium shock without damage, large shock energy consumption and huge shock without beam falling' is finally realized.
Drawings
FIG. 1 is a schematic cross-sectional view of a beam-falling prevention damping device according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a front view of a shock absorbing system for preventing beams from falling according to an embodiment of the present application;
fig. 3 is a schematic front view of a beam falling preventing shock absorbing system according to a second embodiment of the present application;
reference numerals illustrate:
11. a bottom plate; 12. a mounting plate; 13. a cover plate; 21. a ball screw;
22. a nut; 23. a sleeve; 24. a flywheel; 25. a damping element;
26. a first ball joint; 27. a second ball joint; 30. a guy cable; 40. a shock insulation support;
51. a bridge; 52. and (3) pier.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The following description of the technical solutions according to the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways and the spatially relative descriptions used herein are construed accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.
Referring to fig. 1, an explanation will be made on the beam falling preventing shock absorbing device provided by the present application. The beam falling prevention damping device comprises a first support, a second support, an inertial damping component and a inhaul cable 30, wherein the first support is suitable for being connected with a bridge 51; the second support is adapted to be connected to the bridge pier 52; the inertial damping component is transversely arranged, one end of the inertial damping component is connected with the first support, and the other end of the inertial damping component is connected with the second support; one end of the inhaul cable 30 is connected with the first support, and the other end is connected with the second support.
The beam falling prevention damping device provided by the application has the beneficial effects that: compared with the prior art, the beam falling prevention damping device provided by the application combines the advantages of the inertial device and the stay cable 30 limiter, can avoid resonance generated by the bridge 51 structure and speed pulse of the cross/near fault earthquake, dissipates earthquake energy, simultaneously controls the relative displacement of beam piers, prevents the beam falling from being damaged, and the stay cable 30 can play a role in pier-beam connection to realize the beam falling prevention purpose.
As shown in fig. 1, in a specific implementation manner of the beam falling prevention damping device provided by the embodiment of the application, the inertial damping component comprises a ball screw 21, a nut 22, a sleeve 23, a flywheel 24 and a damping element 25, wherein one end of the ball screw 21 is connected with a first support, and the other end extends into the sleeve 23; the sleeve 23 is connected with the second support; the nut 22 is arranged at one end of the sleeve 23 facing the first support and is in rotary fit with the sleeve 23; the flywheel 24 is connected with the nut 22 and is in running fit with the sleeve 23; the damping element 25 is arranged between the flywheel 24 and the sleeve 23, connected to the sleeve 23 and attached to the flywheel 24.
Specifically, the damping element 25 is a viscous damping element, or may be replaced by a friction damping element; wherein the viscous damping element is constituted by a viscous liquid filled between the sleeve 23 and the flywheel 24.
When the inertial damping component acts on an earthquake, the ball screw 21 converts the linear relative motion at two ends of the ball screw into high-speed rotary motion of the flywheel 24, namely conversion of translational motion and rotation is realized, the rotational inertia of the flywheel 24 generates inertial acting force which is far greater than the inertial acting force generated by the physical mass of the flywheel, and therefore the effect of inertial volume synergy is achieved; meanwhile, the rapid rotation of the flywheel 24 can amplify the damping of the damping element 25, so that the effects of energy consumption and efficiency improvement are achieved.
The inertial damping component utilizes the flywheel 24 inertial amplification mechanism and the tuning mechanism to realize dynamic mass amplification and energy consumption synergy, namely, the adjustment of the structural inertial characteristics of the bridge 51 is realized on the premise of basically not changing the physical mass.
In a specific implementation manner of the beam drop preventing shock absorbing device provided in the embodiment of the present application, as shown in fig. 1, a first ball joint 26 is disposed at an end of the ball screw 21 away from the sleeve 23, a second ball joint 27 is disposed at an end of the sleeve 23 away from the ball screw 21, the first ball joint 26 is connected to the first support and has a degree of freedom of rotation relative to the first support, and the second ball joint 27 is connected to the second support and has a degree of freedom of rotation relative to the second support.
Further, as shown in fig. 1, in a specific implementation manner of the beam falling prevention shock absorbing device provided by the embodiment of the application, each of the first support and the second support includes a base plate 11, an installation plate 12 and a cover plate 13, the base plate 11 is used for being connected with a bridge 51 or a bridge pier 52, the installation plate 12 is connected with the base plate 11, the cover plate 13 is connected with the installation plate 12, and the first ball joint 26 or the second ball joint 27 is clamped between the installation plate 12 and the cover plate 13, so that the degree of freedom of rotation relative to the installation plate 12 and the cover plate 13 is provided.
It should be noted that, make the both ends of the shock attenuation subassembly that holds that is used to rotate with first support and second support respectively and be connected, have relative first support and second support pivoted degree of freedom, can effectively unload, transform the shearing force that is used to hold shock attenuation subassembly and first support and second support junction received, avoid the junction to stretch out.
As shown in fig. 1, in a specific implementation manner of the beam falling prevention damping device provided by the embodiment of the application, the stay 30 is a high-strength steel cable stay or a memory alloy stay.
The inhaul cable 30 can play a role in pier-beam connection, plays a tensioning role when the inertial damping component reaches the maximum working displacement, pulls the bridge 51, prevents the falling beam, and achieves the purpose of preventing the falling beam.
Referring to fig. 2 and fig. 3 together, based on the same inventive concept, an embodiment of the present application further provides an anti-beam-falling shock absorbing system, including: the beam falling prevention damping device and the shock insulation support 40 are respectively connected with the bridge 51 and the bridge pier 52; the shock insulation support 40 is arranged between the bridge 51 and the bridge pier 52, and the upper end and the lower end are respectively connected with the bridge 51 and the bridge pier 52.
Specifically, the beam falling prevention damper is provided on one side of the bridge pier 52 where the beam falling easily occurs, and is provided along the direction where the beam falling easily occurs.
As shown in fig. 2 and 3, in a specific implementation of the anti-drop beam shock absorbing system provided by the embodiments of the present application, the maximum displacement allowed by the inertial damping assembly is greater than the maximum shear deformation allowed by the shock mount 40.
As shown in fig. 2 and 3, in one specific implementation of the anti-drop beam shock system provided by the embodiments of the present application, the allowable maximum displacement of the cable 30 is greater than the allowable maximum displacement of the inertial damping assembly.
The beam falling prevention damping system provided by the embodiment of the application has the beneficial effects that: compared with the prior art, the girder falling prevention damping system provided by the embodiment of the application can realize multiple defense lines and graded destruction, and the pier top shock insulation support 40 provides a first defense line when in earthquake action, and the maximum displacement of the shock insulation support 40 under the defense line does not exceed the allowable shear deformation of the shock insulation support 40; the inertial damping assembly provides a second line of defense, expends seismic energy during seismic action, adjusts the frequency of the structure, and provides stiffness when the shock mounts 40 deform beyond a limit; the inhaul cable 30 provides a third defense line, plays a role in pier-beam connection after the shock insulation support 40 and the inertial damping component fail, and achieves the purpose of preventing beam falling; through the synergistic effect of the shock insulation support 40 and the beam falling prevention damping device, the aims of 'small, medium shock without damage, large shock energy consumption and huge shock without beam falling' are finally realized.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (6)
1. The utility model provides a prevent roof beam damping device that falls which characterized in that includes:
the first support is suitable for being connected with a bridge (51);
the second support is suitable for being connected with the bridge pier (52);
the inertial damping component is transversely arranged, one end of the inertial damping component is connected with the first support, and the other end of the inertial damping component is connected with the second support; and
a guy cable (30), one end of which is connected with the first support and the other end of which is connected with the second support; the inhaul cable (30) is a high-strength steel cable inhaul cable or a memory alloy inhaul cable;
the inertial damping component comprises a ball screw (21), a nut (22), a sleeve (23), a flywheel (24) and a damping element (25), wherein one end of the ball screw (21) is connected with the first support, and the other end of the ball screw extends into the sleeve (23); the sleeve (23) is connected with the second support; the nut (22) is arranged at one end of the sleeve (23) facing the first support and is in running fit with the sleeve (23); the flywheel (24) is connected with the nut (22) and is in running fit with the sleeve (23); the damping element (25) is arranged between the flywheel (24) and the sleeve (23), is connected with the sleeve (23) and is attached to the flywheel (24); the damping element is a friction damping element;
the ball screw (21) is kept away from the one end of sleeve pipe (23) is equipped with first ball joint (26), the one end that sleeve pipe (23) kept away from ball screw (21) is equipped with second ball joint (27), first ball joint (26) with first support is connected, and has relative first support pivoted degree of freedom, second ball joint (27) with second support is connected, and has relative second support pivoted degree of freedom.
2. The beam drop prevention damping device according to claim 1, wherein the first support and the second support each comprise a base plate (11), a mounting plate (12) and a cover plate (13), the base plate (11) is used for being connected with a bridge (51) or a bridge pier (52), the mounting plate (12) is connected with the base plate (11), the cover plate (13) is connected with the mounting plate (12), and the first ball joint (26) or the second ball joint (27) is clamped between the mounting plate (12) and the cover plate (13) and has a degree of freedom of rotation relative to the mounting plate (12) and the cover plate (13).
3. A beam fall prevention shock absorbing system, comprising:
the girder falling prevention shock absorbing device according to any one of claims 1 to 2, which is connected to a bridge (51) and a pier (52), respectively; and
the shock insulation support (40) is arranged between the bridge (51) and the bridge pier (52), and the upper end and the lower end of the shock insulation support are respectively connected with the bridge (51) and the bridge pier (52).
4. A girder-falling prevention shock absorbing system according to claim 3, wherein the girder-falling prevention shock absorbing device is arranged along the girder-falling direction of the bridge (51) and is arranged at one side of the girder-falling direction of the bridge (51) of the shock insulation support (40).
5. A drop beam damping system according to claim 3, wherein the maximum allowable displacement of the inertial damping assembly is greater than the maximum allowable shear deformation of the shock isolation mount (40).
6. The anti-drop beam shock system of claim 5, wherein the allowed maximum displacement of the pull cable (30) is greater than the allowed maximum displacement of the inertial damping assembly.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310449776.0A CN116446266B (en) | 2023-04-24 | 2023-04-24 | Beam falling prevention damping device and beam falling prevention damping system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310449776.0A CN116446266B (en) | 2023-04-24 | 2023-04-24 | Beam falling prevention damping device and beam falling prevention damping system |
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| CN116446266A CN116446266A (en) | 2023-07-18 |
| CN116446266B true CN116446266B (en) | 2023-11-17 |
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| CN117071770B (en) * | 2023-08-24 | 2024-01-26 | 石家庄铁道大学 | Flywheel energy storage and shock absorption device for shock insulation structure |
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| CN112575674A (en) * | 2020-12-16 | 2021-03-30 | 石家庄铁道大学 | Combined multistage three-dimensional anti-seismic bridge limiting device based on BRB technology |
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