CN219690283U - Assembled steel-concrete composite beam adopting detachable cluster high-strength bolt connecting piece - Google Patents
Assembled steel-concrete composite beam adopting detachable cluster high-strength bolt connecting piece Download PDFInfo
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- CN219690283U CN219690283U CN202321359361.6U CN202321359361U CN219690283U CN 219690283 U CN219690283 U CN 219690283U CN 202321359361 U CN202321359361 U CN 202321359361U CN 219690283 U CN219690283 U CN 219690283U
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- 239000004567 concrete Substances 0.000 title claims abstract description 38
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 50
- 239000010959 steel Substances 0.000 claims description 50
- 238000004873 anchoring Methods 0.000 claims description 27
- 239000011178 precast concrete Substances 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 238000005336 cracking Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000002929 anti-fatigue Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses an assembled steel-concrete composite beam adopting a detachable cluster high-strength bolt connecting piece, and relates to the technical field of assembled composite beam bridges. The utility model can improve the anti-fatigue capability of the composite beam connecting piece, improve the integrity of the cluster high-strength bolt connecting piece, reduce the group nail effect, reduce the internal stress of the concrete slab in the hogging moment area, improve the cracking load of the bridge deck, realize the rapid maintenance and replacement of the bridge deck and improve the availability of the bridge deck.
Description
Technical Field
The utility model relates to the technical field of assembled composite beam bridges, in particular to an assembled steel-concrete composite beam adopting a detachable cluster high-strength bolt connecting piece.
Background
The steel plate composite beam bridge integrates the advantages of steel and concrete into a whole due to the simple structure and good in-plane bending resistance and shearing resistance, is convenient for standardized production and assembly type construction, can improve the structural construction efficiency and easily ensure the construction quality, is widely applied to small and medium span bridges, and gradually becomes the key development direction of small and medium span bridge engineering in China.
At present, the steel plate composite beam bridge is widely connected by welding nails, and the bridge deck of the connecting form is difficult to dismantle, long in construction period and high in maintenance cost. In recent years, traffic load and environmental corrosion are increasingly aggravated, in the operation process of the bridge, fatigue cracking of the bridge deck slab frequently occurs, and steel bars and bolts have the phenomenon of severe corrosion to different degrees, so that the performance of the steel-concrete composite girder bridge is adversely affected.
Especially for the hogging moment area of the continuous combined beam, the combined action of the concrete plates and the steel beams causes the concrete plates to be pulled, and the compressive stress of the lower flange of the steel beams is increased and is easy to be unstable. The tensile stress in the concrete slab cannot be effectively released due to the restraint of the peg connection, and the overall performance of the composite beam is more adversely affected under the effects of corrosion and fatigue coupling. Because the repairability of the bridge deck is limited, related diseases can occur repeatedly, so that huge maintenance expenditure is caused, and the bridge deck can not be replaced quickly when the bridge deck is damaged to a certain extent.
Disclosure of Invention
The utility model provides an assembled steel-concrete composite beam adopting a detachable cluster high-strength bolt connecting piece, which is used for solving the problems that the traditional steel-concrete composite beam shear connecting piece is low in fatigue resistance, and bridge decks in hogging moment areas are large in tensile stress and easy to crack, and the bridge decks are difficult to replace and reuse.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides an adopt removable cluster bolted connection spare assembled steel reinforced concrete composite beam that excels in, includes girder steel, removable cluster bolted connection spare and precast concrete decking that excels in, girder steel and precast concrete decking pass through removable cluster bolted connection spare and connect.
The utility model further discloses the following technology:
preferably, the steel beam adopts an I-shaped steel beam, and comprises a steel beam upper flange plate, a steel beam web plate and a steel beam lower flange plate.
Preferably, the detachable cluster high-strength bolt connecting piece comprises a high-strength bolt, a high-strength anchoring nut and a high-strength fastening nut, wherein the high-strength bolt is connected to a preformed hole of the upper flange of the steel beam in a penetrating mode, the aperture of the preformed hole is 2-3 mm larger than the diameter of a screw rod of the high-strength bolt, and the high-strength bolt is fixed on the steel beam by applying a pre-tightening force on the high-strength anchoring nut and the high-strength fastening nut.
Preferably, an upper anchoring base plate is arranged between the high-strength anchoring nut and the steel beam, a lower anchoring base plate is arranged between the high-strength fastening nut and the steel beam, and the high-strength bolts are connected to the upper anchoring base plate and the lower anchoring base plate in a penetrating manner.
Preferably, the precast concrete deck slab comprises concrete slabs, reserved holes, reinforcing steel bars in the slabs and wet joints, the concrete slabs are erected on the steel beams, the reserved holes correspond to the positions of the detachable cluster high-strength bolt connecting pieces, the detachable cluster high-strength bolt connecting pieces extend into the reserved holes, and the adjacent concrete slabs are connected through the wet joints.
Preferably, the reserved holes and the wet joints are provided with grouting materials.
Compared with the prior art, the technical scheme provided by the utility model has the following advantages:
1. according to the technical scheme provided by the utility model, the high-strength bolts are adopted to replace the traditional welding studs, so that the fatigue resistance of the combined beam connecting piece can be effectively improved;
2. the technical scheme provided by the utility model adopts a mode of combining the high-strength bolt connecting piece and the anchoring base plate to carry out the structural form of the connecting piece, and the use of the anchoring base plate can improve the integrity of the cluster high-strength bolt connecting piece and reduce the influence of the group nail effect.
3. According to the technical scheme provided by the utility model, the high-strength bolt connecting piece is connected with the steel beam reserved hole in a penetrating way, the bridge deck plate in the hogging moment area transmits shearing force to the high-strength bolt connecting piece in the stressing process, limited displacement can occur in the steel beam, the stress born in the concrete slab can be reduced, and the cracking load of the bridge deck plate is improved.
4. The technical scheme provided by the utility model adopts the detachable high-strength bolt connecting piece, so that the parts exceeding the service life or the components seriously damaged can be conveniently and quickly removed and replaced, and the bridge deck can maintain good integrity in the removing process, thereby being convenient for recycling.
The technical scheme of the utility model is further described in detail through the drawings and the embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of 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 utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an assembled steel-concrete composite beam using a detachable cluster high-strength bolt connection;
FIG. 2 is a schematic view of the installation of the upper deck slab of a removably fabricated steel-concrete composite beam;
FIG. 3 is a schematic view of a detachable high-strength bolt cluster connector for an assembled steel-concrete continuous composite beam;
fig. 4 is a schematic view of the assembly of the detachable high strength bolt cluster connector shown in fig. 1.
In the figure: 1. a steel beam; 2. the cluster high-strength bolt connecting piece can be disassembled; 3. prefabricating a concrete bridge deck; 101. a flange plate on the steel beam; 102. a steel beam web; 103. a steel beam lower flange plate; 104. a preformed hole; 201. a high-strength bolt; 202. a high strength anchor nut; 203. an upper anchoring backing plate; 204. a lower anchoring backing plate; 205. a high-strength fastening nut; 3. prefabricating a concrete bridge deck; 301. a concrete slab; 302. reserving holes; 303. reinforcing steel bars in the plates; 304. wet seams.
The specific embodiment is as follows:
as shown in fig. 1 to 4, the assembled steel-concrete composite beam adopting the detachable cluster high-strength bolt connection piece comprises a steel beam 1, a detachable cluster high-strength bolt connection piece 2 and a precast concrete bridge deck 3.
The steel beam 1 comprises a steel beam upper flange plate 101, a steel beam web 102 and a steel beam lower flange plate 103.
The girder steel upper flange plate 101 is provided with a preformed hole 104.
The detachable cluster high-strength bolt connection piece 2 comprises a high-strength bolt 201, a high-strength anchoring nut 202, an upper anchoring backing plate 203, a lower anchoring backing plate 204 and a high-strength fastening nut 205. The high-strength bolts 201 pass through the high-strength anchoring nuts 202, the upper anchoring backing plates 203, the steel beam upper flange plates 101, the lower anchoring backing plates 204 and the high-strength fastening nuts 205 from top to bottom, and the high-strength bolt connecting pieces are fixed on the steel beam 1 by applying pretightening force.
Precast concrete deck slab 3 includes concrete slabs 301, preformed holes 302, in-slab rebar 303, and wet joints 304. The reserved holes 302 correspond to the positions of the detachable cluster high-strength bolt connectors 2, the concrete plates 301 are erected on the steel beams 1, and the prefabricated reinforced concrete composite beam adopting the detachable cluster high-strength bolt connectors is formed through the reserved holes 302 and the wet joints 304.
The detachable cluster high-strength bolt connecting piece 2 adopts high-strength bolt bearing type connection, and takes sliding between connecting plate layers as normal use, so that small amount of sliding is allowed to be generated on the bridge deck on the upper part of the assembled steel-concrete composite beam by adopting the detachable cluster high-strength bolt connecting piece.
The detachable cluster high-strength bolt connecting piece 2 is screwed down under the pretightening force, the upper anchoring base plate 203 and the lower anchoring base plate 204 tightly clamp the steel beam 1 under the pretightening action of the high-strength anchoring nut 202 and the high-strength fastening nut 205, and the friction force between the detachable cluster high-strength bolt connecting piece 2 and the steel beam 1 provides initial shearing resistance of a steel-concrete interface and resists sliding.
The high-strength fastening nut 205 of the detachable cluster high-strength bolt connecting piece 2 is a locknut, so that the fatigue resistance of the connecting piece can be effectively improved.
The steel beam 1, the detachable cluster high-strength bolt connecting piece 2 and the precast concrete bridge deck 3 are subjected to factory prefabrication processing, vehicle transportation, field assembly and field cast-in-place section construction to complete the construction of the assembled steel-concrete composite beam by adopting the detachable cluster high-strength bolt connecting piece.
The preformed holes 301 of the precast concrete deck panels 3 and the wet joints 302 between adjacent precast concrete deck panels 3 are preferably of a non-shrink concrete material of a number one higher than the precast concrete deck panel 3 material.
The detachable cluster high-strength bolt connecting piece adopted by the utility model can be also applied to a transverse connecting structure of a steel-concrete composite beam.
The foregoing description of the utility model is provided to facilitate the understanding and application of the utility model to those skilled in the art. It will be apparent to those skilled in the art that various modifications may be readily made thereto and that the general principles described herein may be applied to other embodiments without the need for inventive faculty. Therefore, the utility model is not limited to the description herein, and those skilled in the art, based on the disclosure of the utility model, should make improvements and modifications within the scope of the utility model.
Claims (6)
1. The utility model provides an adopt removable cluster bolted connection spare assembled steel reinforced concrete composite beam that excels in, its characterized in that includes girder steel, removable cluster bolted connection spare and precast concrete bridge deck, girder steel and precast concrete bridge deck are through removable cluster bolted connection spare that excels in.
2. The assembled steel-concrete composite beam adopting the detachable cluster high-strength bolt connectors according to claim 1, wherein the steel beam adopts an I-shaped steel beam, and comprises a steel beam upper flange plate, a steel beam web plate and a steel beam lower flange plate.
3. The steel-concrete composite beam assembled by adopting the detachable cluster high-strength bolt connecting piece according to claim 2, wherein the detachable cluster high-strength bolt connecting piece comprises a high-strength bolt, a high-strength anchoring nut and a high-strength fastening nut, the high-strength bolt is connected to a preformed hole of a top flange of the steel beam in a penetrating way, the aperture of the preformed hole is 2-3 mm larger than the diameter of a screw rod of the high-strength bolt, and the high-strength bolt is fixed on the steel beam by applying a pre-tightening force on the high-strength anchoring nut and the high-strength fastening nut.
4. A steel-concrete composite beam assembled by adopting a detachable cluster high-strength bolt connecting piece according to claim 3, wherein an upper anchoring base plate is arranged between the high-strength anchoring nut and the steel beam, a lower anchoring base plate is arranged between the high-strength fastening nut and the steel beam, and the high-strength bolts are connected to the upper anchoring base plate and the lower anchoring base plate in a penetrating manner.
5. The assembled steel-concrete composite beam adopting the detachable clustered high-strength bolt connectors according to claim 1, wherein the precast concrete bridge deck comprises concrete slabs, reserved holes, reinforcing steel bars in the slabs and wet joints, the concrete slabs are erected on the steel beams, the reserved holes correspond to the positions of the detachable clustered high-strength bolt connectors, the detachable clustered high-strength bolt connectors extend into the reserved holes, and adjacent concrete slabs are connected through the wet joints.
6. The fabricated steel-concrete composite beam using the detachable clustered high-strength bolted connection according to claim 5, wherein said pre-perforated holes and wet joints are provided with grouting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321359361.6U CN219690283U (en) | 2023-05-31 | 2023-05-31 | Assembled steel-concrete composite beam adopting detachable cluster high-strength bolt connecting piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321359361.6U CN219690283U (en) | 2023-05-31 | 2023-05-31 | Assembled steel-concrete composite beam adopting detachable cluster high-strength bolt connecting piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219690283U true CN219690283U (en) | 2023-09-15 |
Family
ID=87970963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321359361.6U Active CN219690283U (en) | 2023-05-31 | 2023-05-31 | Assembled steel-concrete composite beam adopting detachable cluster high-strength bolt connecting piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219690283U (en) |
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2023
- 2023-05-31 CN CN202321359361.6U patent/CN219690283U/en active Active
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