CN220579785U - Buffering energy consumption structure and beam falling prevention device - Google Patents
Buffering energy consumption structure and beam falling prevention device Download PDFInfo
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- CN220579785U CN220579785U CN202321953113.4U CN202321953113U CN220579785U CN 220579785 U CN220579785 U CN 220579785U CN 202321953113 U CN202321953113 U CN 202321953113U CN 220579785 U CN220579785 U CN 220579785U
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- 230000003139 buffering effect Effects 0.000 title claims abstract description 38
- 238000005265 energy consumption Methods 0.000 title claims abstract description 28
- 230000002265 prevention Effects 0.000 title claims abstract description 27
- 238000013016 damping Methods 0.000 claims abstract description 123
- 238000004873 anchoring Methods 0.000 claims description 12
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000004308 accommodation Effects 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 14
- 230000005489 elastic deformation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 101100134058 Caenorhabditis elegans nth-1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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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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- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a buffering energy consumption structure and a beam falling prevention device, and belongs to the technical field of bridge engineering. Consists of a pressing block, a first damping element, a … Nth damping element, a limit cushion block and a supporting plate. Under the action of pressure generated by tensioning the pressing block by the inhaul cable, buffering and energy reduction are realized through elastic deformation of a plurality of superposed damping elements; after the damping elements are deformed, the damping elements are easy to attach to each other and generate sliding friction to consume energy; when the deformation exceeds a certain displacement, the damping element is plastically deformed, and impact energy is further absorbed. The beam falling prevention device adopting the structure not only realizes double energy consumption and strong energy consumption capacity, but also has stronger bearing and resetting capacities through the elastoplastic deformation and sliding friction of the damping piece; the multi-stage fortification parameters such as buffer displacement, buffer rigidity, maximum force and the like of the beam falling prevention device are easy to design, and the stress is definite; the device simple structure is reliable, and economic nature is good, can effectively prevent the emergence of the roof beam body and fall the roof beam phenomenon under the seismic action.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering, and particularly relates to a buffering energy consumption structure and a beam falling prevention device.
Background
The bridge is a key node of life line engineering, and has extremely important roles in post-earthquake emergency rescue, earthquake relief and post-disaster recovery reconstruction. In-service bridges in China are over 100 thousands, a large number of bridges are in earthquake areas, and how to ensure the earthquake-resistant safety of the bridges is a core concern of the industry.
The falling beam is the most serious of bridge shock hazard, and domestic and foreign bridge shock hazard investigation shows that the falling beam disaster caused by overlarge earthquake displacement of the bridge superstructure is common. The beam falling prevention device is designed, the bridge structure is required to be ensured not to fall under the action of unexpected earthquake, the earthquake-resistant safety of the bridge structure under the condition of the ultra-fortification earthquake is effectively improved with smaller investment, and the beam falling prevention device is typical in 'small investment and large benefit'.
The research on the beam falling prevention in China starts late, the current anti-seismic standard only gives the type and the overall requirement of the beam falling prevention device, and the steel strand inhaul cable type limiting device consisting of inhaul cables, supporting plates, anchoring sleeves and fastening nuts is applied to a certain extent at present. But the device can only provide certain spacing bearing capacity, and under the earthquake impact, the buffering and the energy-absorbing effect of this type of device are poor, can not effectively reduce the earthquake power, prevent falling the roof beam effect not good. In order to meet actual engineering demands, a thick inhaul cable is often required, and an anchoring area is reinforced to ensure structural safety.
Disclosure of Invention
Aiming at the problems that the existing beam falling prevention device is insufficient in buffering and energy consumption capability, complex in anchoring structure, high in manufacturing cost and the like, the buffering and energy consumption structure is necessary to be configured on the basis of the conventional inhaul cable beam falling prevention device, the anchoring structure is optimized, the rapid attenuation of the relative motion between the beam body and between the beam body and the abutment is realized, the maximum impact force is reduced, the beam body is prevented from exceeding a bearing area of a bearing, the beam body is prevented from falling from the bearing and even falling from the bearing, and the safety of the bridge structure is ensured.
The utility model adopts the following technical scheme: a cushioning energy consuming structure comprising: the support plate and the pressing block are oppositely arranged; a first damping element, a third, an nth damping element disposed between the press block and the support plate; the N damping elements are respectively accommodated in the N-1 damping elements, and N is an integer greater than or equal to 2;
further comprises: the limiting gasket is arranged between the Nth damping element and the supporting plate; the through holes are formed in preset positions of the supporting plate, the pressing block, the first damping element, the …, the N damping element and the limiting gasket, and the through holes provide penetrating space for the inhaul cable.
In a further embodiment, the first damping element, …, nth damping element each comprise: the horizontal section is symmetrically arranged at the transition sections at the two ends of the horizontal section, and the connecting section is connected with the transition sections;
wherein, the horizontal section and the changeover portion of every group damping element form corresponding accommodation chamber, and the height of the accommodation chamber of first damping element, …, the nth damping element is the trend of reducing.
In a further embodiment, the connection sections of the first damping element, … and the nth damping element are stacked end to end in sequence.
In a further embodiment, the spacing pad includes: a horizontal plane and inclined planes symmetrically connected to both ends of the horizontal plane; a predetermined gap is left between the horizontal plane and the support plate.
In further embodiments, the first damping element, the third and the nth damping elements are made of one of steel, aluminum alloy and memory alloy.
A beam drop prevention device comprising: at least one group of connecting seats, wherein the connecting seats are provided with buffering energy consumption structures;
further comprises: the stay rope is connected between the two groups of connecting seats or between the connecting seat and the hinged base, and the locking piece is used for fixing the stay rope;
wherein, the buffering power consumption structure is as described above.
In a further embodiment, the locking member comprises:
the anchoring sleeve is sleeved on a guy cable which sequentially passes through the connecting seat and the buffering energy consumption structure;
and the fastening bolt is fastened to the anchoring sleeve.
In a further embodiment, the connecting seat is provided with a through hole, and the guy cable passes through the through hole;
the through hole is provided with an expansion port forming guide structure at one end face deviating from the buffering energy consumption structure.
The utility model has the beneficial effects that: 1. the buffer energy consumption structure formed by superposition of the damping elements realizes double energy consumption through elastic plastic deformation of the elements and sliding friction among the elements, and has strong buffer energy consumption capability.
2. The beam falling prevention device adopts a steel strand inhaul cable assembly and a buffering energy consumption structure, and inhaul cables in the steel strand inhaul cable assembly have strong tensile bearing capacity; the buffering energy consumption structure mainly bears pressure, all parts can be fully loaded under the action of the pressure, the material utilization rate is high, and the ultimate bearing capacity is strong.
3. The damping energy consumption structure and the beam falling prevention device thereof can realize multi-stage damping energy consumption under different requirements by changing the number and the shape of damping elements and adjusting the friction coefficient of the sliding surface, and have larger damping displacement.
4. The buffering energy consumption structure and the beam falling prevention device have the advantages that the parameters such as the buffering displacement, the buffering rigidity, the maximum force and the like are easy to design, the stress is definite, and the performance is stable and reliable.
5. The beam falling prevention device is simple and reliable in structure, high in cost performance, easy to engineering application, detachable in parts such as pressing blocks, damping elements and limiting washers, and easy to overhaul and maintain and replace in later period.
Drawings
Fig. 1 is a schematic diagram of a buffering energy dissipation structure in embodiment 1.
Fig. 2 is a cross-sectional view of the buffering energy dissipation structure in embodiment 1.
Fig. 3 is a schematic structural view of the first damping element in embodiment 1.
Fig. 4 is a schematic structural view of a second damping element in embodiment 1.
Fig. 5 is a schematic structural view of the briquette in example 1.
Fig. 6 is a schematic structural diagram of a limit pad in embodiment 1.
Fig. 7 is a schematic structural view of the support plate in embodiment 2.
Fig. 8 is a schematic diagram of a structure of a buffering and energy dissipating structure and a beam falling preventing device for beam-to-beam connection in embodiment 2.
Fig. 9 is a schematic diagram of a buffering energy dissipation structure and a beam falling prevention device for beam-to-beam connection in embodiment 2.
Fig. 10 is a schematic diagram of a buffering energy dissipation structure and a beam falling prevention device for pier-beam connection in embodiment 3.
Fig. 11 is a schematic diagram of a buffering energy dissipation structure and a beam falling prevention device for pier-beam connection in embodiment 3.
Each labeled in fig. 1 to 11 is: the damping energy consumption structure 1, a guy cable 2, an anchoring sleeve 3, a fastening nut 4, a hinged base 5, a beam body 6, a support 7, a pier 8, a pressing block 11, a first damping element 12, a second damping element 13, a third damping element 14, a limiting cushion block 15, a supporting plate 16, a horizontal section 121, a transition section 122, a horizontal plane 151, an inclined plane 152 and a guiding structure 161.
Detailed Description
The utility model is further described below with reference to the drawings and examples of the specification.
Example 1
A cushioning energy consuming structure 1 comprising: a press block 11, a first damping element 12, an nth damping element, a limit pad 15 and a support plate 16. Structurally, the first damping element 12, the first and the nth damping elements are sequentially arranged between the pressing block 11 and the supporting plate 16, the nth damping elements are respectively contained in the nth-1 damping elements, and N is an integer greater than or equal to 2. The spacing pad is disposed between the nth damping element and the support plate 16. As shown in fig. 1 and 2, the intermediate positions of the pressing block 11, the first damping element 12, the nth damping element, the limit pad 15 and the support plate 16 are all provided with through holes for the stay cable 2 to pass through.
In other words, the first damping element 12 is disposed on the inner side of the pressing block 11, the second damping element 13 is disposed on the inner side of the first damping element 12, and so on, the nth damping element is disposed on the inner side of the N-1 th damping element, and the limit pad 15 is disposed on the inner side of the nth damping element. Taking n=3 as an example, namely, including: a first damping element 12, a second damping element 13 and a third damping element 14.
Referring again to fig. 3 and 4, the first damping element 12, the third and the nth damping elements are relatively similar in cross section, being omega-shaped in cross section, and are embodied as follows: comprising the following steps: the horizontal section 121, the transition sections 122 symmetrically arranged at two ends of the horizontal section 121, and the connecting sections connected to the transition sections 122. The horizontal sections 121 and the transition sections 122 of each set of damping elements form corresponding accommodation cavities, the heights of the accommodation cavities of the first damping element 12, … and the nth damping element have a decreasing trend. The connection sections of the first damping elements 12, … and the N damping elements are overlapped end to end in sequence, and the N damping elements and the limit cushion 15 are propped against the supporting plate 16.
In combination with the present embodiment, the height of the accommodating cavity of the first damping element 12 is higher than that of the second damping element 13, the height of the accommodating cavity of the second damping element 13 is higher than that of the third damping element 14, and the height of the accommodating cavity of the third damping element 14 is higher than that of the limit cushion 15.
The outer surface of the accommodating cavity of the N-th damping element can be sequentially overlapped with the inner surface of the N-1-th damping element, the opposite surfaces can be mutually attached and relatively slide after deformation, and the attached surfaces of the damping elements which are likely to relatively slide are subjected to rough treatment to increase the friction coefficient and improve the energy consumption capability, and the friction coefficient is preferably between 0.25 and 0.4, so that the first damping element 12, the first damping element' s.A. and the N-th damping element are made of one of steel, aluminum alloy and memory alloy.
As shown in fig. 6, the limit gasket includes: a horizontal plane 151, and inclined planes 152 symmetrically connected to both ends of the horizontal plane 151; the horizontal surface 151 and the support plate 16 are spaced apart by a predetermined gap to provide a greater bearing stiffness. The distance of the gap is smaller than the height of the accommodating cavity of the nth damping element.
Example 2
As shown in fig. 7 and 8, a drop beam device is connected between the beam body 6 and the beam body 6 for limiting excessive relative displacement. The beam falling prevention device comprises: two groups of connecting seats are provided with a buffering energy dissipation structure 1, and the buffering energy dissipation structure 1 in the embodiment is as described in the embodiment 1.
The beam falling prevention device in this embodiment further includes: a guy cable 2 connected between the two groups of connecting seats and a locking piece for fixing the guy cable 2. Two ends of the inhaul cable 2 respectively penetrate through the connecting seat and the corresponding buffering energy dissipation structure 1.
The retaining member includes: the anchor sleeve 3 is sleeved at the end of the inhaul cable 2 which sequentially passes through the connecting seat and the buffering energy consumption structure 1, and the fastening bolt is fastened on the anchor sleeve 3 and compresses the pressing block 11. The pressing block 11 is pressed, and the first damping element 12 has certain elasticity under the action of pressure, so that the inhaul cable 2 is ensured to be in a tensioning state under the condition of normal operation of the bridge. In order to facilitate the arrangement of the stay cable 2, a through hole is formed in the connecting seat, and the stay cable passes through the through hole; the through-hole is provided with an expansion port forming guide structure 161 at an end face facing away from the buffering energy dissipation structure 1.
Based on the above description, the pressing block 11 realizes a buffering function through elastic deformation of a plurality of overlapped special-shaped damping elements under the action of pressure generated by tightening the inhaul cable 2; after deformation occurs between the damping elements, the damping elements are easy to mutually adhere and generate sliding friction to consume energy; when the displacement exceeds a certain amount, the damping element is plastically deformed, and impact energy is further absorbed.
When an earthquake occurs, the relative displacement between the beam bodies 6 is increased, the first damping element 12, the second damping element 13 and the third damping element 14 are firstly elastically deformed to buffer under the pressure action of the pressing block 11, and the relative sliding energy consumption occurs between the damping elements; as the displacement continues to be increased, the first damping element 12, the second damping element 13 and the third damping element 14 are sequentially subjected to plastic deformation, the first damping element 12, the second damping element 13 and the third damping element 14 are tightly attached under the support of the support plate 16, the local relative sliding displacement is gradually increased, the compression rigidity is increased in a step-like manner during the period, and the buffering and more energy consumption with sequentially increased rigidity are realized; after that, when the first damping element 12, the second damping element 13 and the third damping element 14 have undergone sufficient elastoplastic deformation, the inner surface of the accommodating cavity of the third damping element 14 contacts with the outer surface of the limit cushion block 15, the limit cushion block 15 provides greater bearing rigidity and bearing capacity, limit limiting, and the beam body 6 is prevented from falling from the connecting seat and falling from the beam.
Example 3
As shown in fig. 10 and 11, a beam falling preventing device is connected between a beam body 6 and a pier 8 to limit excessive relative displacement, the beam falling preventing device is composed of a buffering energy dissipation structure 1 (installed on a connecting seat) and a stay cable 2, an anchoring sleeve 3, a fastening bolt and a hinged base 5 in a steel strand stay cable 2 assembly, the hinged base 5 is fixed in the pier 8 and can adapt to a certain rotation angle, a supporting plate 16 is fixed in the connecting seat, and the connecting seat is fixed on the beam body 6. The guide structure 161 is also provided to accommodate the space required for the rotation angle of the cable 2.
When an earthquake occurs, the relative displacement between the beam body 6 and the abutment 8 is increased, the first damping element 12, the second damping element 13 and the third damping element 14 are elastically deformed to buffer under the pressure action of the pressing block 11, and the damping elements consume energy due to relative sliding; as the displacement continues to increase, the first damping element 12, the second damping element 13 and the third damping element 14 are sequentially subjected to plastic deformation, the first damping element 12, the second damping element 13 and the third damping element 14 are more tightly attached under the support of the support plate 16, the local relative sliding displacement is gradually increased, the compression rigidity is increased in a step-like manner during the period, and the buffering and more energy consumption with the sequentially increased rigidity are realized; after that, when the first damping element 12, the second damping element 13 and the third damping element 14 have undergone sufficient elastoplastic deformation, the inner surface of the cavity of the third damping element 14 contacts with the outer surface of the limit pad 15, the limit pad 15 provides greater bearing rigidity and bearing capacity, limit limiting, and the beam body 6 is prevented from falling from the connecting seat and falling from the beam.
In summary, the end of the cable 2 is fixed to the anchoring sleeve 3, the fastening nut 4 is screwed into the anchoring sleeve 3 to compress the pressing block 11, and the middle of the supporting plate 16 is provided with a through hole and a guiding structure 161 for the cable 2 to pass through and adapt to the small angle of rotation of the cable 2. The lower part of the supporting plate 16 is fixed on the beam body 6 to provide support for the beam falling prevention device. The beam falling prevention device can be arranged between the beam body 6 and the beam body 6, between the beam body 6 and the pier body or between the beam body 6 and the bridge abutment, and can effectively prevent the beam body 6 from falling from the support 7 and falling under the action of an earthquake.
Claims (8)
1. A buffering energy dissipation structure, comprising: the support plate and the pressing block are oppositely arranged; a first damping element, a third, an nth damping element disposed between the press block and the support plate; the N damping elements are respectively accommodated in the N-1 damping elements, and N is an integer greater than or equal to 2;
further comprises: the limiting gasket is arranged between the Nth damping element and the supporting plate; the through holes are formed in preset positions of the supporting plate, the pressing block, the first damping element, the …, the N damping element and the limiting gasket, and the through holes provide penetrating space for the inhaul cable.
2. The cushioning energy dissipating structure of claim 1 wherein said first damping element, …, nth damping element each comprise: the horizontal section is symmetrically arranged at the transition sections at the two ends of the horizontal section, and the connecting section is connected with the transition sections;
wherein, the horizontal section and the changeover portion of every group damping element form corresponding accommodation chamber, and the height of the accommodation chamber of first damping element, …, the nth damping element is the trend of reducing.
3. The buffering and energy-consuming structure of claim 2, wherein the connection sections of the first damping element, … and the nth damping element are sequentially overlapped end to end.
4. The cushioning energy dissipating structure of claim 1, wherein said spacing pad comprises: a horizontal plane and inclined planes symmetrically connected to both ends of the horizontal plane; a predetermined gap is left between the horizontal plane and the support plate.
5. The cushioning energy dissipating structure of claim 1, wherein the first damping element, the N-th damping element, and the first damping element are made of one of steel, aluminum alloy, and memory alloy.
6. A beam drop prevention device, comprising: at least one group of connecting seats, wherein the connecting seats are provided with buffering energy consumption structures;
further comprises: the stay rope is connected between the two groups of connecting seats or between the connecting seat and the hinged base, and the locking piece is used for fixing the stay rope;
wherein the buffering energy consuming structure is as claimed in any one of claims 1 to 5.
7. The beam drop prevention device of claim 6, wherein the locking member comprises:
the anchoring sleeve is sleeved on a guy cable which sequentially passes through the connecting seat and the buffering energy consumption structure;
and the fastening bolt is fastened to the anchoring sleeve and compresses the pressing block.
8. The beam falling prevention device according to claim 6, wherein the connecting seat is provided with a through hole, and the stay rope passes through the through hole;
the through hole is provided with an expansion port forming guide structure at one end face deviating from the buffering energy consumption structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321953113.4U CN220579785U (en) | 2023-07-21 | 2023-07-21 | Buffering energy consumption structure and beam falling prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321953113.4U CN220579785U (en) | 2023-07-21 | 2023-07-21 | Buffering energy consumption structure and beam falling prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220579785U true CN220579785U (en) | 2024-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321953113.4U Active CN220579785U (en) | 2023-07-21 | 2023-07-21 | Buffering energy consumption structure and beam falling prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220579785U (en) |
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2023
- 2023-07-21 CN CN202321953113.4U patent/CN220579785U/en active Active
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