CN215714579U - Swinging self-resetting bridge three-column pier structure with soft steel damper - Google Patents
Swinging self-resetting bridge three-column pier structure with soft steel damper Download PDFInfo
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- CN215714579U CN215714579U CN202121945737.2U CN202121945737U CN215714579U CN 215714579 U CN215714579 U CN 215714579U CN 202121945737 U CN202121945737 U CN 202121945737U CN 215714579 U CN215714579 U CN 215714579U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 55
- 239000010959 steel Substances 0.000 title claims abstract description 55
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 11
- 239000011152 fibreglass Substances 0.000 claims abstract description 8
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 27
- 210000002435 tendon Anatomy 0.000 claims description 19
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 11
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 239000011374 ultra-high-performance concrete Substances 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 230000006378 damage Effects 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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Abstract
The utility model discloses a swinging self-resetting bridge three-column pier structure containing a soft steel damper, which effectively improves the shock resistance of a prefabricated bridge multi-column pier bent frame structure by arranging a shear key, the soft steel damper, an unbonded prestressed rib, an energy-consuming reinforcing steel bar, glass fiber reinforced plastics and the like, is simple to construct, is convenient for later maintenance and is suitable for large-scale popularization.
Description
Technical Field
The utility model relates to the field of civil engineering, in particular to a swinging self-resetting bridge three-column pier structure with a soft steel damper.
Background
The existing bridge bent is the most convenient and shortcut in modern bridge construction by adopting a traditional cast-in-place method to realize the construction of a prefabricated bridge structure, and the method is short in construction period, economical, environment-friendly and the trend of bridge construction development. Under the action of earthquake, the traditional multi-column pier bent frame structure can cause severe damage and damage to a pier and large residual displacement, and is difficult to repair after earthquake.
Therefore, a swinging self-resetting bridge three-column pier structure containing a soft steel damper is urgently needed, and the problem of poor shock resistance of the existing precast bridge multi-column pier bent frame structure can be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a swinging self-resetting bridge three-column pier structure containing a soft steel damper, and aims to solve the problem that the existing precast bridge multi-column pier bent frame structure is poor in anti-seismic capacity.
In order to achieve the purpose, the utility model provides the following scheme:
the utility model provides a swinging self-resetting bridge three-column pier structure containing a soft steel damper, which comprises a bridge foundation, wherein a left pier, a middle pier and a right pier are vertically arranged on the upper surface of the bridge foundation side by side, the tops of the left pier, the middle pier and the right pier are jointly supported by a cover beam, and the diameter of the section of the left pier is the same as that of the section of the right pier and is larger than that of the section of the middle pier;
unbonded prestressed tendons radially penetrate through the inner parts of the left pier and the right pier, the top parts of the unbonded prestressed tendons are anchored at the top parts of the capping beams, and the bottom parts of the unbonded prestressed tendons are anchored in the bridge foundation;
the joints of the left pier and the capping beam, the joints of the left pier and the bridge foundation, the joints of the right pier and the capping beam and the joints of a plurality of right piers and the bridge foundation are all connected with shear keys and energy-consuming steel bars;
tie beams are connected between the middle part of the left pier and the middle part of the middle pier and between the middle part of the right pier and the middle part of the middle pier through mild steel dampers;
and the top and the bottom of the middle pier are surrounded by glass fiber reinforced plastics.
Preferably, the left pier, the middle pier, the right pier, the capping beam and the tie beam are all prefabricated structures.
Preferably, the cross-sectional diameter of the left pier and the cross-sectional diameter of the right pier are both 2-3 times the cross-sectional diameter of the middle pier.
Preferably, the unbonded prestressed tendons are respectively arranged at the central positions of the left pier and the right pier.
Preferably, the unbonded prestressed reinforcing steel bars and the energy-consuming reinforcing steel bars are both made of shape memory alloy reinforcing steel bars.
Preferably, the shear key is of a square steel tube structure, and the inside of the shear key is filled with ultra-high performance concrete.
Preferably, the soft steel damper and the left pier, the soft steel damper and the tie beam, the soft steel damper and the middle pier and the soft steel damper and the right pier are connected through embedded bolt assemblies.
Preferably, the mild steel damper comprises fixed steel sheets which are symmetrically arranged, an energy dissipation sheet with an opening is clamped between the fixed steel sheets, and the fixed steel sheets are clamped through bolts and nuts.
Preferably, a rubber pad is arranged on the outer side of the fixed steel sheet.
Preferably, a rubber sheet is arranged between the energy dissipation sheets with the openings.
Compared with the prior art, the utility model has the following beneficial technical effects:
according to the swinging self-resetting bridge three-column pier structure containing the mild steel damper, the whole structure adopts a factory-prefabricated on-site rapid assembling construction mode, so that the bridge construction period can be greatly shortened, and the influence on the surrounding environment and ecology is reduced; the left pier and the right pier adopt a swinging self-resetting design concept, the middle pier adopts a traditional design method, the vertical bearing capacity of the bent frame is borne by the pier and the capping beam under the normal use state, and the shearing resistance bearing capacity and the lateral bearing capacity are provided by the non-swinging middle pier, the tie beam, the shear key and the energy consumption steel bar; under the action of an earthquake, the section of the middle pier is small, the vertical rigidity is small, the swing characteristic of the left pier and the right pier is ensured, meanwhile, the middle pier is connected with the left pier and the right pier through the tie beams in a non-swing design, the lateral rigidity of the structure is increased, and the axial strength and the rigidity are mainly provided by the left pier and the right pier; the joints of the left and right piers, the bent cap and the bridge foundation are provided with a certain number of energy-consuming longitudinal ribs, so that the longitudinal bridge shear-resisting bearing capacity and the lateral rigidity can be provided for the bent frame structure in a normal use state, the energy-consuming effect is achieved, and the structural damage is reduced; meanwhile, the left pier and the right pier are provided with non-bonded prestressed tendons to provide self-resetting capability for the multi-column bent structure, so that residual displacement of the multi-column bent structure after an earthquake is greatly reduced; the tie beam based on the fuse concept is arranged between the pier in the transverse direction, so that the transverse bridge strength and rigidity of the column pier bent frame structure are increased, and a prefabricated structure is adopted, so that the construction and installation are convenient; meanwhile, the integral stability of the structural system is improved; the tie beam is connected with the mild steel damper through embedded bolt assemblies on two sides; the soft steel damper is adopted as an energy consumption component, compared with the traditional tie beam, the damage phenomenon of the joint of the tie beam and the pier after earthquake can be avoided, the soft steel damper is simple in structure and convenient to arrange, stress concentration does not exist, the energy dissipation and shock absorption effects can be well realized, the damage to the tie beam under the earthquake action can be reduced, the damage to the joint of the tie beam and the pier can also be effectively avoided, the energy consumption damper can be disassembled and reinstalled after being damaged, and the repair difficulty is greatly reduced; the adoption of the shape memory alloy steel bar as the non-adhesive prestressed bar and the energy-consuming steel bar can effectively avoid the influence of corrosion of the steel bar on the performance, increase the service life and the durability of the structure and simultaneously increase the application range of the system; the upper ring and the lower ring of the middle pier are externally coated with glass fiber reinforced plastics, so that the bearing capacity of the middle column and the deformation capacity of the bent structure are increased; the shear keys embedded in the left pier and the right pier are made of square steel pipes, and the shear strength and the torsional strength of the left pier and the right pier are improved under the action of an earthquake.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural view of a three-column pier of a swinging self-resetting bridge containing a soft steel damper provided by the utility model;
FIG. 2 is a schematic structural view of a part of a soft steel damper in a swinging self-resetting bridge three-pier structure containing the soft steel damper provided by the utility model;
FIG. 3 is a schematic structural view of an energy dissipation plate with an opening in a three-column pier structure of a swinging self-resetting bridge containing a mild steel damper provided by the utility model;
in the figure: 1: bridge foundation, 2: left pier, 3: right pier, 4: middle pier, 5: capping beam, 6: shear key, 7: mild steel damper, 7-1: energy dissipation sheet with opening, 7-2: rubber sheet, 7-3: fixing a steel sheet, 7-4: nut, 7-5: rubber pad, 7-6: bolt, 8: non-adhesive prestressed tendon, 9: energy consumption reinforcing steel bar, 10: pre-buried bolt subassembly, 11: tie beam, 12: glass fiber reinforced plastic.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model aims to provide a swinging self-resetting bridge three-column pier structure containing a soft steel damper, and aims to solve the problem that the existing precast bridge multi-column pier bent frame structure is poor in anti-seismic capacity.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1:
the embodiment provides a swinging self-resetting bridge three-column pier structure comprising a soft steel damper 7, as shown in fig. 1, the swinging self-resetting bridge three-column pier structure comprises a bridge foundation 1, wherein a left pier 2, a middle pier 4 and a right pier 3 are vertically arranged on the upper surface of the bridge foundation 1 side by side, the tops of the left pier 2, the middle pier 4 and the right pier 3 jointly support a cover beam 5, and the diameter of the section of the left pier 2 is the same as that of the section of the right pier 3, and is larger than that of the section of the middle pier 4; the inside of the left pier 2 and the inside of the right pier 3 are both radially provided with unbonded prestressed tendons 8 in a penetrating manner, the tops of the unbonded prestressed tendons 8 are anchored at the tops of the capping beams 5, and the bottoms of the unbonded prestressed tendons 8 are anchored in the bridge foundation 1; the joints of the left pier 2 and the capping beam 5, the joints of the left pier 2 and the bridge foundation 1, the joints of the right pier 3 and the capping beam 5 and the joints of a plurality of right piers 3 and the bridge foundation 1 are connected with shear keys 6 and energy-consuming steel bars 9; tie beams 11 are connected between the middle part of the left pier 2 and the middle part of the middle pier 4 and between the middle part of the right pier 3 and the middle part of the middle pier 4 through mild steel dampers 7; the top and bottom of the middle pier 4 are surrounded by glass fiber reinforced plastic 12.
Specifically, the left pier 2, the middle pier 4, the right pier 3, the cover beam 5 and the tie beam 11 are all prefabricated structures, and construction is convenient.
Further, the cross-sectional diameter of the left pier 2 and the cross-sectional diameter of the right pier 3 are both 2 times the cross-sectional diameter of the middle pier 4.
Further, unbonded tendons 8 are respectively arranged at the central positions of the left pier 2 and the right pier 3.
Furthermore, the unbonded prestressed reinforcing steel bars 8 and the energy-consuming reinforcing steel bars 9 are both made of shape memory alloy reinforcing steel bars.
Further, the shear key 6 is of a square steel tube structure, and the inside of the shear key is filled with ultra-high performance concrete.
Further, as shown in fig. 2, the mild steel damper 7 and the left pier 2, the mild steel damper 7 and the tie beam 11, the mild steel damper 7 and the middle pier 4, and the mild steel damper 7 and the right pier 3 are connected through the embedded bolt assembly 10.
Furthermore, the soft steel damper 7 comprises fixed steel sheets 7-3 which are symmetrically arranged, energy dissipation sheets 7-1 with openings are clamped between the fixed steel sheets 7-3, and the fixed steel sheets 7-3 are clamped by bolts 7-6 and nuts 7-4.
Furthermore, a rubber pad 7-5 is arranged on the outer side of the fixed steel sheet 7-3.
Further, as shown in figure 3, rubber sheets 7-2 are arranged between the energy dissipation sheets 7-1 with the openings.
The utility model provides a swinging self-resetting bridge three-column pier structure containing a mild steel damper, which comprises the following construction methods: the method comprises the following steps that the bridge foundation 1 is cast in site, a non-adhesive prestressed tendon 8 is arranged between the sections of a left pier 2 and a right pier 3, the bottom of the non-adhesive prestressed tendon 8 is anchored in the bridge foundation 1, and after the top of the non-adhesive prestressed tendon 8 penetrates through a cover beam 5, prestress is applied and anchored at the top of the cover beam 5; the left pier 2 and the right pier 3 are connected with the capping beam 5 and the bridge foundation 1 at the upper and lower joints by shear force keys 6; the energy-consuming steel bars 9 at the bottom are respectively inserted into the reserved holes of the left pier 2 and the right pier 3 and then grouted to ensure effective bonding, and the energy-consuming steel bars 9 at the top are inserted into the reserved holes in the bent cap 5 and then grouted to ensure effective bonding; the mild steel damper 7 is respectively fixed with the tie beam 11, the left pier 2, the right pier 3 and the middle pier 4 through the embedded bolt assembly 10; and finally, the upper end and the lower end of the middle pier 3 are annularly and externally coated with glass fiber reinforced plastics 12.
The utility model provides a swinging self-resetting bridge three-column pier structure containing a soft steel damper, which has the following advantages that firstly, the construction mode adopts prefabricated assembly, the restraint of a left pier and a right pier is relaxed, the swinging self-resetting design is adopted, the bent structure swings under the action of an earthquake, the structure is reset through a non-bonding prestressed tendon, the residual displacement and the concrete cracking after the bent structure is in the earthquake can be greatly reduced, and the earthquake damage and the damage of the bent structure are reduced. Secondly, this structural system has adopted the design of taking mild steel attenuator ductility tie beam, compares with the multi-column bent frame structure of traditional area tie beam, and the mild steel attenuator can effectually avoid pier stud and tie beam node to destroy, and power consumption mild steel attenuator simple structure moreover, and the cost is cheap, can quick replacement after becoming invalid. Thirdly, the non-adhesive prestressed tendons and the non-adhesive energy-consuming steel bars are adopted in the structural system, so that the influence of corrosion on the performance of the steel bars can be effectively avoided, and the service life and the durability of the structure are increased. And fourthly, the glass fiber reinforced plastics wrapped outside the upper side and the lower side of the middle pier improve the bearing capacity and the energy consumption capacity of a structural system, delay the cracking and crushing of concrete at the positions of the pier column, the capping beam and the foundation node, and have certain energy consumption capacity. Fifthly, the lateral strength and rigidity of the structural system are provided by the middle pier and the tie beam with the energy dissipation soft steel damper, and the vertical strength and rigidity, the collapse resistance and the energy dissipation capacity are provided by the left pier and the right pier.
The principle and the implementation mode of the utility model are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (10)
1. The utility model provides a contain three pier structures of rocking from restoring to throne bridge of mild steel attenuator, includes the bridge foundation, the upper surface of bridge foundation is vertical side by side to be equipped with left mound, well mound and right mound, a left side mound well mound with the common bearing in top of right mound has bent cap, its characterized in that: the diameter of the section of the left pier is the same as that of the section of the right pier, and the diameters of the sections of the left pier and the right pier are both larger than that of the section of the middle pier;
unbonded prestressed tendons radially penetrate through the inner parts of the left pier and the right pier, the top parts of the unbonded prestressed tendons are anchored at the top parts of the capping beams, and the bottom parts of the unbonded prestressed tendons are anchored in the bridge foundation;
the joints of the left pier and the capping beam, the joints of the left pier and the bridge foundation, the joints of the right pier and the capping beam and the joints of a plurality of right piers and the bridge foundation are all connected with shear keys and energy-consuming steel bars;
tie beams are connected between the middle part of the left pier and the middle part of the middle pier and between the middle part of the right pier and the middle part of the middle pier through mild steel dampers;
and the top and the bottom of the middle pier are surrounded by glass fiber reinforced plastics.
2. The rocking self-resetting bridge three-column pier structure containing the mild steel damper as claimed in claim 1, wherein: the left pier, the middle pier, the right pier, the capping beam and the tie beam are all prefabricated structures.
3. The rocking self-resetting bridge three-column pier structure containing the mild steel damper as claimed in claim 1, wherein: the diameter of the section of the left pier and the diameter of the section of the right pier are both 2-3 times of the diameter of the section of the middle pier.
4. The rocking self-resetting bridge three-column pier structure containing the mild steel damper as claimed in claim 1, wherein: the unbonded prestressed tendons are respectively arranged at the central positions of the left pier and the right pier.
5. The rocking self-resetting bridge three-column pier structure containing the mild steel damper as claimed in claim 1, wherein: the unbonded prestressed reinforcing steel bars and the energy-consuming reinforcing steel bars are both made of shape memory alloy reinforcing steel bars.
6. The rocking self-resetting bridge three-column pier structure containing the mild steel damper as claimed in claim 1, wherein: the shear key is of a square steel tube structure, and the inside of the shear key is filled with ultra-high performance concrete.
7. The rocking self-resetting bridge three-column pier structure containing the mild steel damper as claimed in claim 1, wherein: the soft steel damper and the left pier, the soft steel damper and the tie beam, the soft steel damper and the middle pier and the soft steel damper and the right pier are connected through embedded bolt assemblies.
8. The rocking self-resetting bridge three-column pier structure containing the mild steel damper as claimed in claim 1, wherein: the soft steel damper comprises fixed steel sheets which are symmetrically arranged, an energy dissipation sheet with an opening is clamped between the fixed steel sheets, and the fixed steel sheets are clamped through bolts and nuts.
9. The rocking self-resetting bridge three-column pier structure containing the mild steel damper as claimed in claim 1, wherein: and a rubber pad is arranged on the outer side of the fixed steel sheet.
10. The rocking self-resetting bridge three-column pier structure containing the mild steel damper as claimed in claim 1, wherein: and a rubber sheet is arranged between the energy dissipation sheets with the holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121945737.2U CN215714579U (en) | 2021-08-18 | 2021-08-18 | Swinging self-resetting bridge three-column pier structure with soft steel damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121945737.2U CN215714579U (en) | 2021-08-18 | 2021-08-18 | Swinging self-resetting bridge three-column pier structure with soft steel damper |
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| Publication Number | Publication Date |
|---|---|
| CN215714579U true CN215714579U (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121945737.2U Expired - Fee Related CN215714579U (en) | 2021-08-18 | 2021-08-18 | Swinging self-resetting bridge three-column pier structure with soft steel damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215714579U (en) |
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2021
- 2021-08-18 CN CN202121945737.2U patent/CN215714579U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |