CN109423950B - Steel bridge and concrete shearing combination structure thereof - Google Patents
Steel bridge and concrete shearing combination structure thereof Download PDFInfo
- Publication number
- CN109423950B CN109423950B CN201710738543.7A CN201710738543A CN109423950B CN 109423950 B CN109423950 B CN 109423950B CN 201710738543 A CN201710738543 A CN 201710738543A CN 109423950 B CN109423950 B CN 109423950B
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- shear
- truss
- plate
- shear plate
- key
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- 239000004567 concrete Substances 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 11
- 239000010959 steel Substances 0.000 title claims abstract description 11
- 238000010008 shearing Methods 0.000 title claims description 7
- 238000003466 welding Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 13
- 238000004873 anchoring Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000011150 reinforced concrete Substances 0.000 abstract description 2
- 238000009417 prefabrication Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a shear-resistant combined structure of bridge concrete, which comprises a truss type supporting structure and fishbone-shaped shear keys, wherein the fishbone-shaped shear keys are formed by longitudinally arranging shear key units, each shear key unit comprises a first shear plate, a second shear plate and a shear rod, one end of each first shear plate is connected with the middle part of each second shear plate, each shear rod traverses the first shear plate and the second shear plate, and adjacent shear key units are welded in sequence and distributed longitudinally to form the fishbone-shaped shear keys. By the arrangement, a shear groove is formed between the first shear plate and the second shear plate of the shear key, and the shear bar enables the shear key to be integrated with reinforced concrete, so that the shear resistance is improved. The truss type supporting structure adopts a prefabrication assembly technology, and in a construction site, high-strength anchoring bolts pass through reserved holes of specially-made groove type angle steel and are screwed and fixed by high-strength anchoring nuts, so that the truss of the supporting structure is spliced.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a shear-resistant combined structure of bridge concrete.
Background
The shear key is an important shearing resistant member in the steel-concrete combined structure, and has the function of effectively transmitting horizontal shearing force born by the steel bridge and preventing the two parts at the interface from sliding and separating horizontally, so that the steel structure and the concrete structure with larger elastic modulus difference form a whole to work together.
Many countries have studied that various shear key devices are used in the structural composite beam, different shear keys have different influences on the performance of a bridge, and the traditional shear keys mostly adopt traditional welded nail type shear keys or PBL shear keys, but because the stressed cross-section area of the traditional shear keys is smaller, the shear bearing value of the traditional shear keys is reduced, and the utilization rate of materials is lower.
The truss is a supporting beam structure connected through welding, riveting or bolts, and truss members mainly bear axial tension or compression force, so that the strength of materials is fully utilized, the materials are saved compared with the solid web beam when the span is large, the dead weight is reduced, and the rigidity is increased.
In recent years, due to the widespread popularization of advanced technologies in assembled structures, the application of assembled structures starts to get rid of valleys and gradually rises. The assembled structure has the advantages of high industrialization level, convenience in winter construction, reduction of work load on construction sites, reduction of material consumption, reduction of construction site dust and construction waste, and the like. Meanwhile, the method is beneficial to improving the building quality, improving the construction efficiency, reducing the construction cost and achieving the purposes of saving energy, reducing emission and protecting the environment.
Disclosure of Invention
The invention aims to provide a novel shear key which can effectively improve the shearing resistance of a steel-concrete combined structure.
The invention solves the technical problems by adopting the following scheme: the utility model provides a concrete shear resistant integrated configuration of bridge, including truss-like bearing structure and the fishbone shape shear key on upper portion of lower part, the shear key is formed along vertical arrangement by the shear key unit, the shear key unit includes first shear plate, second shear plate and shear bar, and first shear plate one end links to each other with the second shear plate middle part, and the shear bar crosses first shear plate and second shear plate, and adjacent shear key unit welds in proper order to this is along longitudinal distribution forms the shear key of fishbone shape, welds the fishbone shape shear key and fixes at bearing structure upper portion with the electric welding, forms a shear groove between two shear plates, and the shear bar crosses first shear plate and second shear plate, and distributes at certain height. The lower supporting structure is formed by connecting and combining truss units, an upper bridge deck and a lower bridge deck, wherein the truss units are provided with truss diagonal members, truss vertical members and truss chords. Here, the truss unit is a right triangle, the truss diagonal is a hypotenuse of the right triangle, the truss vertical is a right angle side of the right triangle, the truss chord is a right angle triangle bottom side, and the tailored trough angle steel is used as the truss chord. The rod pieces are arranged according to the above, and then are spliced by high-strength anchoring bolts. The truss is characterized in that the truss is fixed on the truss chord member through a transverse high-strength anchor bolt, the truss chord member is connected with the upper bridge deck plate and the lower bridge deck plate through groove structure tenons, then the truss chord member is assembled and fixed with the upper bridge deck plate and the lower bridge deck plate through the vertical high-strength anchor bolt, and the truss is screwed and fixed through high-strength nuts, so that the truss is spliced with the upper bridge deck plate and the lower bridge deck plate.
Preferably, the first shear plates and the second shear plates are connected in a longitudinal and uniform manner, are connected by welding, the angle between the first shear plates and the second shear plates is 30-150 degrees, the thickness is 1cm-5cm, the height is 5cm-10cm, and the length is 10cm-15cm.
As described above, the shear resistant combined structure of the bridge concrete provided by the invention has the following beneficial effects:
1. the shear resistance of the steel-concrete combined structure can be effectively improved through the novel shear key, the efficiency of the steel-concrete combined structure is fully exerted, and the steel structure and the concrete structure can be more effectively combined together, so that the combining capability of the two materials is improved.
2. The novel shear key comprises the shear key units, the shear key units are of a herringbone structure formed by combining the first shear plates and the second shear plates and are longitudinally distributed along the supporting structure, so that the novel shear key similar to a fishbone is integrally formed.
3. The lower support structure is of a truss structure, is prefabricated by a factory, is assembled on a construction site, and has the advantages of being high in industrialization level, convenient to construct in winter, reducing the wet workload of the construction site, reducing material consumption, reducing construction site dust, building rubbish and the like.
4. Because the shear bars are transverse to the first shear plates and the second shear plates and are in a large number, the integrity of the shear keys and the reinforced concrete is enhanced to a certain extent, and therefore the shear resistance of the structure is improved.
Drawings
In order to better illustrate the present invention, an embodiment of the present invention will be briefly described below, and of course, the following drawings are only an example of the present invention.
FIG. 1 is a schematic view of the overall structure provided by the present invention;
FIG. 2 is a left side view of the overall structure of the present invention;
FIG. 3 is a top view of the overall structure of the present invention;
fig. 4 is a front view of the overall structure of the present invention.
Wherein, in the figure:
a first shear plate-1; a second shear plate-2; truss vertical bar-3; truss diagonal bar-4; truss chord-5; shear groove-6; a vertical high-strength anchoring bolt 7; a transverse high-strength anchoring bolt-8; an upper bridge deck-9; lower deck board-10; a shear bar-11; special groove angle steel-12.
Detailed Description
For a better understanding of the present invention, reference will now be made to the embodiments of the invention by way of specific examples, which are intended to be illustrative of the basic structure of the invention and are not to be construed as limiting the invention in any way.
Referring to the drawings, the overall structure of a specific embodiment provided by the invention is shown. In one embodiment of the invention, a shear resistant composite structure of concrete of a bridge mainly comprises a truss type supporting structure and a fishbone type shear key.
The truss type supporting structure is mainly used for bearing main loads of bridges, such as compressive force, tensile force and the like. The supporting structure is formed by connecting and combining truss units, an upper bridge deck and a lower bridge deck. In the invention, a truss structure is prefabricated and spliced, an upper bridge deck 9 and a lower bridge deck 10 with high-strength anchor bolt reserved holes are prefabricated in a factory, and in a construction site, a transverse high-strength anchor bolt 8 passes through angle steel with the high-strength anchor bolt reserved holes, passes through a steel plate with the high-strength anchor bolt reserved holes, and is screwed and fixed by high-strength anchor nuts. The truss of the supporting structure is formed by connecting and combining truss units, the truss diagonal bar 4 is a hypotenuse of a right triangle, the truss vertical bar 3 is a right angle side of the right triangle, the truss chord 5 is a right angle triangle bottom side, the rod pieces are arranged according to the arrangement, and are spliced by using the vertical high-strength anchor nuts 7, so that the on-site splicing of the whole supporting structure is completed, and finally, the upper bridge deck 9 is subjected to formwork casting concrete. The prefabricated splicing technology is characterized in that the rapid splicing is realized by the embedded assembly of the special groove-type angle steel 12 and the upper bridge deck and the lower bridge deck.
The fishbone-shaped shear key is also a key of the invention, and can greatly improve the shear resistance of the structure. The shear key is typically disposed on the upper deck plate and welded to the support structure. The main structure of the shear key comprises a first shear plate 1, a second shear plate 2 and a shear bar 11. One end of the first shear plate 1 is connected with the middle part of the second shear plate 2, the shear rods 11 transversely penetrate through the first shear plate 1 and the second shear plate 2, adjacent shear key units are welded in sequence, so that fishbone-shaped shear keys are formed by longitudinal distribution along a supporting structure, and the shear keys are welded and fixed on the upper part of the upper bridge deck 9 by electric welding. The shear bars 11 are arranged to cross the first shear plate 1 and the second shear plate 2, which is beneficial to relieving the shearing force of the first shear plate 1 and the second shear plate 2, so that the deformation of the shear plates is small, and meanwhile, the heights of all the shear bars are the same.
In the invention, the angle at which the first shear plate 1 and the second shear plate 2 are connected is set to 30 DEG to 150 DEG, the thickness is set to 1cm to 5cm, the height is set to 5cm to 10cm, and the length is set to 10cm to 15cm. More specifically, the first shear plate 1 and the second shear plate 2 are connected at an angle of 90 °, the shear plates have a thickness of 1.5cm, a height of 5cm, and a length of 12cm.
Therefore, in the shear resistant combined structure provided by the invention, a shear groove 6 is formed between the two shear plates, so that the embedded of cast-in-place concrete is facilitated, and the shear resistance is improved. Meanwhile, the truss type supporting structure is prefabricated by adopting a factory, and assembled on a construction site, and the embedded type assembly technology is beneficial to rapid construction and stable structure. The invention has wide engineering application and can be suitable for various railway bridges and highway bridges.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (2)
1. The utility model provides a concrete shear resistant integrated configuration of bridge, includes truss-like bearing structure and fishbone shaped shear key, its characterized in that, the shear key comprises shear key unit along vertical arrangement, shear key unit includes first shear plate (1), second shear plate (2) and shear bar (11), angle that links to each other through the welding between first shear plate (1) and second shear plate (2), form a shear groove between two shear plates, adjacent shear key unit welds in proper order, along vertical arrangement to form fishbone shaped shear resistant integrated configuration, and the fishbone shaped shear key welds to be fixed on bearing structure upper portion, and shear bar (11) cross first shear plate (1) and second shear plate (2), and the height that all shear bars set up keeps unanimous, link to each other between first shear plate (1) and second shear plate (2) is 30 ~ 150, and thickness is set to 1cm-5cm, and height is set to 5cm-10cm and is set to 10cm-15cm length.
2. The concrete shearing resistant combined structure of the bridge according to claim 1, characterized in that the supporting structure is a factory prefabricated spliced truss structure, the supporting structure comprises truss vertical rods (3), truss diagonal rods (4), truss chords (5), upper bridge decks (9) and lower bridge decks (10), wherein the truss diagonal rods, the truss vertical rods and the truss chords form a right triangle, the truss diagonal rods are hypotenuses of the right triangle, the truss vertical rods are right angle sides of the right triangle, the truss chords are right angle triangle bottom edges, special groove type angle steels are used as the truss chords, the truss vertical rods (3) and the truss diagonal rods (4) are fixed on the truss chords (5) through transverse high-strength anchor bolts (8), the truss chords (5) are connected with the upper bridge decks and the lower bridge decks through groove structure tenons, and the truss chords (5) are assembled and fixed with the upper bridge decks and the lower bridge decks through vertical high-strength anchor bolts (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710738543.7A CN109423950B (en) | 2017-08-22 | 2017-08-22 | Steel bridge and concrete shearing combination structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710738543.7A CN109423950B (en) | 2017-08-22 | 2017-08-22 | Steel bridge and concrete shearing combination structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109423950A CN109423950A (en) | 2019-03-05 |
| CN109423950B true CN109423950B (en) | 2024-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710738543.7A Active CN109423950B (en) | 2017-08-22 | 2017-08-22 | Steel bridge and concrete shearing combination structure thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN109423950B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201250454Y (en) * | 2008-08-29 | 2009-06-03 | 万水 | Flange-shaped shear connector |
| CN101725182A (en) * | 2010-02-01 | 2010-06-09 | 昆明理工大学 | Shearing connecting piece |
| KR101084736B1 (en) * | 2011-07-05 | 2011-11-22 | 이기홍 | A shear connector which install the position-fixing device, a girder with that connector, and the method of slab construction using it all |
| CN104047223A (en) * | 2014-07-08 | 2014-09-17 | 厦门中平公路勘察设计院有限公司 | Light composite structure bridge and construction method thereof |
| CN205063126U (en) * | 2015-10-14 | 2016-03-02 | 山东隆和节能科技股份有限公司 | Belted steel pipe truss superimposed sheet |
| CN205653804U (en) * | 2016-05-16 | 2016-10-19 | 中交第一公路勘察设计研究院有限公司 | Slope assembled warp self -adaptation protection skeleton |
| CN106223188A (en) * | 2016-09-27 | 2016-12-14 | 广东工业大学 | A kind of bridge and shearing resistance combinative structure thereof |
| CN207619818U (en) * | 2017-08-22 | 2018-07-17 | 广东工业大学 | A kind of shearing resistance composite structure of the concrete of bridge |
-
2017
- 2017-08-22 CN CN201710738543.7A patent/CN109423950B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201250454Y (en) * | 2008-08-29 | 2009-06-03 | 万水 | Flange-shaped shear connector |
| CN101725182A (en) * | 2010-02-01 | 2010-06-09 | 昆明理工大学 | Shearing connecting piece |
| KR101084736B1 (en) * | 2011-07-05 | 2011-11-22 | 이기홍 | A shear connector which install the position-fixing device, a girder with that connector, and the method of slab construction using it all |
| CN104047223A (en) * | 2014-07-08 | 2014-09-17 | 厦门中平公路勘察设计院有限公司 | Light composite structure bridge and construction method thereof |
| CN205063126U (en) * | 2015-10-14 | 2016-03-02 | 山东隆和节能科技股份有限公司 | Belted steel pipe truss superimposed sheet |
| CN205653804U (en) * | 2016-05-16 | 2016-10-19 | 中交第一公路勘察设计研究院有限公司 | Slope assembled warp self -adaptation protection skeleton |
| CN106223188A (en) * | 2016-09-27 | 2016-12-14 | 广东工业大学 | A kind of bridge and shearing resistance combinative structure thereof |
| CN207619818U (en) * | 2017-08-22 | 2018-07-17 | 广东工业大学 | A kind of shearing resistance composite structure of the concrete of bridge |
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| Publication number | Publication date |
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| CN109423950A (en) | 2019-03-05 |
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