CN108677683A - Improve the combined bridge and production method of shear connector fatigue life - Google Patents
Improve the combined bridge and production method of shear connector fatigue life Download PDFInfo
- Publication number
- CN108677683A CN108677683A CN201810402014.4A CN201810402014A CN108677683A CN 108677683 A CN108677683 A CN 108677683A CN 201810402014 A CN201810402014 A CN 201810402014A CN 108677683 A CN108677683 A CN 108677683A
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- China
- Prior art keywords
- shear connector
- concrete slab
- girder
- fatigue life
- steel box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000004567 concrete Substances 0.000 claims abstract description 74
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- 239000003822 epoxy resin Substances 0.000 claims abstract description 28
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 28
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 28
- 238000011065 in-situ storage Methods 0.000 claims description 9
- 238000009408 flooring Methods 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000009416 shuttering Methods 0.000 description 2
- 239000011374 ultra-high-performance concrete Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000002689 soil 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
- E01D12/00—Bridges characterised by a combination of structures not covered as a whole by a single one of groups E01D2/00 - E01D11/00
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling 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 the combined bridges and production method that improve shear connector fatigue life, steel box-girder includes two girder steels extended along bridge length direction, several are along spaced apart first diaphragm plate in bridge length direction, every 1 first diaphragm plate is fixedly connected with two girder steels, and each girder steel top is equipped with the support plate extended along bridge length direction；Shear connector is fixedly connected on the supporting plate；Concrete slab bottom end offers identical as shear connector number and one-to-one preformed hole, and when concrete slab is placed on steel box-girder, each shear connector is respectively protruding into corresponding preformed hole；It is perfused with epoxy resin mortar layer between each support plate both ends and concrete slab.The combined bridge effectively improves the cohesive force of combination interface between steel box-girder and concrete slab, the shear resistance for increasing combination interface so that the stress concentration of shear connector and concrete slab is improved, to effectively improve the fatigue life of shear connector.
Description
Technical field
The present invention relates to the combined bridges and production method that improve shear connector fatigue life.
Background technology
Steel-concrete combined structure bridge is an important branch in current science of bridge building, either crosses over deep wealthy sea
The especially big Oversea bridge in gorge, or all kinds of Short/Medium Span Bridges of urban transportation are solved, composite bridge all uses force greatly it
Ground.Due to that can give full play to the advantage of different materials or system respectively, composite structure technology is also to work as front axle beam innovation system
One of important directions.Active force wherein between girder steel and concrete slab is transmitted by shear connector, shear connector
Fatigue behaviour have key effect to the service life of bridge and normal use.And combined bridge in the prior art, shearing connect
Fitting easy tos produce sliding and leads to fatigue rupture.
Invention content
The present invention provides the combined bridges and production method that improve shear connector fatigue life, and which overcome background skills
The existing deficiency of art.The present invention solves one of used technical solution of its technical problem：
Improve shear connector fatigue life combined bridge, it include several be connected with each other steel box-girders, several
Shear connector, several epoxy resin mortar layers and concrete slab；
Steel box-girder includes two girder steels extended along bridge length direction, several are spaced apart along bridge length direction
First diaphragm plate, every 1 first diaphragm plate are fixedly connected with two girder steels, and each girder steel top is equipped with along bridge length side
To the support plate of extension；
Shear connector is fixedly connected on the supporting plate；
Concrete slab bottom end offers identical as shear connector number and one-to-one preformed hole, works as concrete
Each shear connector is respectively protruding into corresponding preformed hole when floorings are placed on steel box-girder；
Epoxy resin mortar layer is perfused between each support plate and concrete slab.
Among one preferred embodiment：Epoxy resin mortar layer thickness is 5-15mm.
Among one preferred embodiment：It is additionally provided with rubber pad, epoxy between each support plate both ends and concrete slab
Screed is located in the region that rubber pad, support plate and concrete slab surround.
Among one preferred embodiment：Steel box-girder further includes the bottom plate extended along bridge length direction, bottom plate both ends respectively with
Two girder steels connect, and multiple longitudinal ribs extended along bridge length direction are provided on the bottom plate between two girder steels.
Among one preferred embodiment：It is connected by the second diaphragm plate between two neighboring steel box-girder.
Among one preferred embodiment：Shear connector is peg, and two pegs are welded in each support plate.
Among one preferred embodiment：Concrete slab includes precast section and Cast-in-Situ Segment, is led between two neighboring precast section
The mode for crossing tongue and groove connection connects Cast-in-Situ Segment, and preformed hole is arranged in precast section.
Among one preferred embodiment：It is provided with deformed bar in the hogging moment area of concrete slab.
The present invention solve the used technical solution of its technical problem second is that：Improve shear connector fatigue life
The production method of combined bridge：
Step 10, be prefabricated in the factory steel box-girder and shear connector, then shear connector is soldered to the support of steel box-girder
On plate and it is transported to scene, is attached by the second diaphragm plate between adjacent two steel box-girders；
Step 20, be prefabricated in the factory concrete slab precast section and precast section in advance remain for place deformed bar
Pre-manufactured hole and preformed hole for accommodating shear connector, and precast section is transported to scene, by the way of tongue and groove connection
The connection that pours carried out between Cast-in-Situ Segment and precast section forms concrete slab；
Step 30, deformed bar is mounted in pre-manufactured hole, and prestressing force is applied so that concrete to deformed bar
The hogging moment area of floorings is in preloading condition；
Step 40, rubber pad is placed on to the both ends of support plate；
Step 50, concrete slab is placed on steel box-girder and shear connector stretches into preformed hole correspondingly
It is interior；
Step 60, epoxy resin mortar is perfused in the region that rubber pad, support plate and concrete slab surround；
Step 70, the casting concrete in each preformed hole, shear connector and concrete slab are fixed
Connection, just completes the assembly of combined bridge.
Among one preferred embodiment：In step 60, the thickness control of epoxy resin mortar is in 5-15mm.
Compared with the background art, it has the following advantages that the technical program：
1. be perfused with epoxy resin mortar layer between each support plate and concrete slab, epoxy resin mortar by support plate, cut
Power connector and concrete slab three are attached, and effectively increase combination interface between steel box-girder and concrete slab
Cohesive force so that the stress globality of entire combined bridge is more preferable, and the shear resistance for increasing combination interface to shear
The stress concentration of connector and concrete slab is improved, so as to effectively improve the fatigue life of shear connector.Together
When, the precast section in steel box-girder, shear connector and concrete slab can be completed transported again to construction site in factory process,
Can assembly connection at the scene, reduce situ wet operation and shuttering work, ensure that site operation quality, improve building industry
Change efficiency of assembling.
2. epoxy resin mortar layer thickness is 5-15mm, effectively improving for the fatigue life of shear connector can guarantee.
3. being additionally provided with rubber pad between each support plate both ends and concrete slab, epoxy resin mortar layer is located at rubber
In the region that pad, support plate and concrete slab surround, rubber pad can be by the gap between concrete slab and support plate
It is reserved, be there is no gap between concrete slab and support plate when concrete slab being prevented to be placed on steel box-girder and make
Epoxy resin mortar can not be perfused.
4. steel box-girder further includes bottom plate and longitudinal rib, it is further ensured that the stability of steel box-girder, prevents steel box-girder from locally occurring
Buckling.
5. being provided with deformed bar in the hogging moment area of concrete slab, tension, the cracking resistance of hogging moment area can be improved
Performance.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 depicts the lateral schematic cross-sectional view of the combined bridge of a preferred embodiment.
Fig. 2 depicts longitudinal schematic cross-sectional view of the combined bridge of a preferred embodiment.
Fig. 3 depicts the elevational schematic view of the concrete slab of a preferred embodiment.
Fig. 4 depicts the front schematic view of the shear connector of a preferred embodiment.
Fig. 5 depicts the cross-sectional view of the rubber pad of a preferred embodiment.
Fig. 6 depicts the assembling schematic diagram of a steel box-girder and concrete slab of a preferred embodiment.
Specific implementation mode
Fig. 1 to Fig. 6 is please referred to, a preferred embodiment of the combined bridge of shear connector fatigue life is improved, it is described
The combined bridge of shear connector fatigue life is improved, it includes several steel box-girders 10 being connected with each other, several shearing companies
Fitting 20, several epoxy resin mortar layers 30 and concrete slab 40.
Steel box-girder 10 includes two girder steels 11 extended along bridge length direction, several are along bridge length direction interval cloth
The first diaphragm plate 12 set, every 1 first diaphragm plate 12 are fixedly connected with two girder steels 11, and 11 top of each girder steel is equipped with
The support plate 13 extended along bridge length direction.In the present embodiment, using the side of welding between the first diaphragm plate 12 and girder steel 11
Formula is fixed, and is also fixed using welding manner between support plate 13 and girder steel 11.
In the present embodiment, rubber pad 50 is additionally provided between 13 both ends of each support plate and concrete slab 40.Rubber
Pad 50 can reserve the gap between concrete slab 40 and support plate 13, to facilitate the perfusion of epoxy resin mortar.
In the present embodiment, steel box-girder 10 further includes the bottom plate 14 extended along bridge length direction, 14 both ends of bottom plate respectively with
Two girder steels 11 connect, and multiple longitudinal ribs extended along bridge length direction are provided on the bottom plate 14 between two girder steels 11
15.15 top of longitudinal rib is connected with every 1 first diaphragm plate 13.
In the present embodiment, several steel box-girders 10 are arranged laterally at a spacing, and pass through the second cross between two neighboring steel box-girder 10
Partition board 16 is connected.Second number of diaphragm plate 16 is identical as 12 numbers of the first diaphragm plate and corresponds, the second 16 liang of diaphragm plate
End is connected with the first diaphragm plate 12 of two neighboring steel box-girder respectively.
Shear connector 20 is fixedly connected in support plate 13.In the present embodiment, shear connector 20 is peg, Mei Yizhi
Two pegs are welded on fagging 13.Positioned at the support plate 13 of fringe region, two pegs are located at the same side of support plate 13, position
Support plate 13 in bridge intermediate region, two pegs are located at the left and right sides of support plate 13.
In the present embodiment, shear connector 20 carries out an arranged for interval by group number, and one group of shear connector 20 is set there are six cutting
Power connector 20 and two-by-two interval be arranged side by side.
40 bottom face of concrete slab offers identical as 20 numbers of shear connector and one-to-one preformed hole 41,
When concrete slab 40 is placed on steel box-girder 10, each shear connector 20 is respectively protruding into corresponding preformed hole 41.This
In embodiment, the arrangement mode of preformed hole 41 is as shown in figure 3, identical as the arrangement mode of shear connector 20.
In the present embodiment, concrete slab 40 includes precast section 42 and Cast-in-Situ Segment 43, between two neighboring precast section 42
Cast-in-Situ Segment 43 is connected by way of tongue and groove connection, preformed hole 41 is arranged in precast section 42.Precast section 42 can be complete in plant produced
At being transported again to construction site.
In the present embodiment, concrete slab 40 uses ultra-high performance concrete material, and thickness is in 50mm or so.Due to super
With normal concrete there are significant difference, ultra-high performance concrete material can reduce bridge floor and split the mechanical property of high performance concrete
The generation of seam.
In the present embodiment, deformed bar 44 is provided in the hogging moment area of concrete slab 40.After the present invention uses
Combined techniques, that is, the pre-manufactured hole for being used on and placing deformed bar is reserved in the precast section 42 of casting concrete floorings, when
Precast section 42 is transported to after scene is combined with Cast-in-Situ Segment 43, then deformed bar 44 is mounted in pre-manufactured hole, and to answering in advance
Power reinforcing bar 44 applies prestressing force so that the hogging moment area of concrete slab be in preloading condition, can improve resisting for hogging moment area
It draws, compressive property.
Epoxy resin mortar layer 30 is perfused between each support plate 13 and concrete slab 40.In the present embodiment, epoxy
30 thickness of screed is 5-15mm.Preferably, the thickness of epoxy resin mortar layer 30 is set as 10mm.The combination of combined bridge during operation
Interface portion shearing force is transmitted by epoxy resin mortar, is reduced the Fatigue Stress Amplitude of shear connector and is improved fatigue life.
In the present embodiment, epoxy resin mortar floor 30 is located at the area that rubber pad 50, support plate 13 and concrete slab 40 surround
In domain so that epoxy resin mortar is attached support plate 13, shear connector 20 and 40 three of concrete slab.
The production method for improving the combined bridge of shear connector fatigue life：
Step 10, be prefabricated in the factory steel box-girder 10 and shear connector 20, then shear connector 20 is soldered to steel box-girder
Support plate 13 on and be transported to scene, be attached by the second diaphragm plate 16 between adjacent steel box-girder 10；
Step 20, be prefabricated in the factory concrete slab precast section 42 and precast section 42 in advance remain for place prestressing force
The pre-manufactured hole of reinforcing bar 44 and preformed hole 41 for accommodating shear connector 20, and precast section 42 is transported to scene, using enterprise
The mode of mouth connection carries out the connection that pours between Cast-in-Situ Segment 43 and precast section 42 and forms concrete slab 40；
Step 30, deformed bar 44 is mounted in pre-manufactured hole, and prestressing force is applied to deformed bar 44 so that mixed
The hogging moment area of solidifying soil floorings 40 is in preloading condition；
Step 40, rubber pad 50 is placed on to the both ends of support plate 13；
Step 50, by concrete slab 40 be placed on steel box-girder 10 and shear connector 20 stretch into correspondingly it is pre-
It boxes out in 41；
Step 60, epoxy resin mortar is perfused in the region that rubber pad 50, support plate 13 and concrete slab 40 surround；This
In embodiment, in step 60, the thickness control of epoxy resin mortar is in 5-15mm.Preferably, the thickness of epoxy resin mortar is set as 5mm.
Step 70, the casting concrete in each preformed hole 41, by shear connector 20 and concrete slab 40 into
Row is fixedly connected, and just completes the assembly of combined bridge.
It is perfused with epoxy resin mortar layer 30 between 13 both ends of each support plate and concrete slab 40, effectively increases steel
The cohesive force of combination interface between box beam 10 and concrete slab 40 so that the stress globality of entire combined bridge is more preferable,
And the shear resistance for increasing combination interface so that the stress concentration of shear connector and concrete slab is improved, to
The fatigue life of shear connector 20 can be effectively improved.Meanwhile in steel box-girder 10, shear connector 20 and concrete slab
Precast section 42 can be completed transported again to construction site in factory process, can assembly connection at the scene, reduce situ wet operation and
Shuttering work ensure that site operation quality, improve building industrialization efficiency of assembling.
The above, only present pre-ferred embodiments, therefore cannot limit the scope of implementation of the present invention according to this, i.e., according to
Equivalent changes and modifications made by the scope of the claims of the present invention and description all should still belong in the range of the present invention covers.
Claims (10)
1. improving the combined bridge of shear connector fatigue life, it is characterised in that：It includes the steel case that several are connected with each other
Beam, several shear connectors, several epoxy resin mortar layers and concrete slab；
Steel box-girder includes two girder steels extended along bridge length direction, several are along bridge length direction spaced apart first
Diaphragm plate, every 1 first diaphragm plate are fixedly connected with two girder steels, and each girder steel top is equipped with prolongs along bridge length direction
The support plate stretched；
Shear connector is fixedly connected on the supporting plate；
Concrete slab bottom end offers identical as shear connector number and one-to-one preformed hole, works as concrete bridge deck
Each shear connector is respectively protruding into corresponding preformed hole when plate is placed on steel box-girder；
It is perfused with epoxy resin mortar layer between each support plate both ends and concrete slab.
2. the combined bridge according to claim 1 for improving shear connector fatigue life, it is characterised in that：Epoxy resin mortar
Layer thickness is 5-15mm.
3. the combined bridge according to claim 1 or 2 for improving shear connector fatigue life, it is characterised in that：It is each
Rubber pad is additionally provided between support plate both ends and concrete slab, epoxy resin mortar layer is located at rubber pad, support plate and coagulation
In the region that native floorings surround.
4. the combined bridge according to claim 1 for improving shear connector fatigue life, it is characterised in that：Steel box-girder is also
Include the bottom plate extended along bridge length direction, bottom plate both ends are connect with two girder steels respectively, are located at the bottom between two girder steels
Multiple longitudinal ribs extended along bridge length direction are provided on plate.
5. the combined bridge according to claim 1 for improving shear connector fatigue life, it is characterised in that：It is two neighboring
It is connected by the second diaphragm plate between steel box-girder.
6. the combined bridge according to claim 1 for improving shear connector fatigue life, it is characterised in that：Shear connection
Part is peg, and two pegs are welded in each support plate.
7. the combined bridge of the raising shear connector fatigue life according to claim 1 or 4 or 5 or 6, feature exist
In：Concrete slab includes precast section and Cast-in-Situ Segment, is connected by way of tongue and groove connection between two neighboring precast section existing
Section is poured, preformed hole is arranged in precast section.
8. the combined bridge of the raising shear connector fatigue life according to claim 1 or 4 or 5 or 6, feature exist
In：It is provided with deformed bar in the hogging moment area of concrete slab.
9. the production method for improving the combined bridge of shear connector fatigue life, it is characterised in that：
Step 10, be prefabricated in the factory steel box-girder and shear connector, then shear connector is soldered in the support plate of steel box-girder
And it is transported to scene, it is attached by the second diaphragm plate between adjacent two steel box-girders；
Step 20, be prefabricated in the factory concrete slab precast section and precast section in advance remain for place deformed bar it is pre-
Drilling and preformed hole for accommodating shear connector, and precast section is transported to scene, it is carried out by the way of tongue and groove connection
The connection that pours between Cast-in-Situ Segment and precast section forms concrete slab；
Step 30, deformed bar is mounted in pre-manufactured hole, and prestressing force is applied so that concrete bridge deck to deformed bar
The hogging moment area of plate is in preloading condition；
Step 40, rubber pad is placed on to the both ends of support plate；
Step 50, concrete slab is placed on steel box-girder and shear connector stretches into preformed hole correspondingly, and
Concrete slab is in contact with rubber pad；
Step 60, epoxy resin mortar is perfused in the region that rubber pad, support plate and concrete slab surround；
Step 70, the casting concrete in each preformed hole, shear connector and concrete slab are fixedly connected,
Just the assembly of combined bridge is completed.
10. the production method of the combined bridge according to claim 9 for improving shear connector fatigue life, feature exist
In：In step 60, the thickness control of epoxy resin mortar is in 5-15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810402014.4A CN108677683A (en) | 2018-04-28 | 2018-04-28 | Improve the combined bridge and production method of shear connector fatigue life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810402014.4A CN108677683A (en) | 2018-04-28 | 2018-04-28 | Improve the combined bridge and production method of shear connector fatigue life |
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| Publication Number | Publication Date |
|---|---|
| CN108677683A true CN108677683A (en) | 2018-10-19 |
Family
ID=63802641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810402014.4A Pending CN108677683A (en) | 2018-04-28 | 2018-04-28 | Improve the combined bridge and production method of shear connector fatigue life |
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| Country | Link |
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| CN (1) | CN108677683A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749117A (en) * | 2020-06-18 | 2020-10-09 | 苏交科集团股份有限公司 | Dumbbell-shaped stud shear connector and construction method thereof |
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| CN106638259A (en) * | 2017-02-16 | 2017-05-10 | 上海市城市建设设计研究总院（集团）有限公司 | Upper structure of prefabricated cover-beam-free type combined steel plate bridge and assembling construction method of upper structure |
| CN107700345A (en) * | 2017-10-17 | 2018-02-16 | 青海省高等级公路建设管理局 | A kind of wet seam anticorrosion construction method of steel-concrete combination beam and purposes |
| CN208517806U (en) * | 2018-04-28 | 2019-02-19 | 华侨大学 | A kind of combined bridge improving shear connector fatigue life |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604841A (en) * | 1983-04-01 | 1986-08-12 | Barnoff Robert M | Continuous, precast, prestressed concrete bridge deck panel forms, precast parapets, and method of construction |
| CN104929034A (en) * | 2015-06-25 | 2015-09-23 | 浙江大学 | Small modularized steel-concrete rapid-construction box girder bridge and construction method thereof |
| CN105256723A (en) * | 2015-09-01 | 2016-01-20 | 中铁大桥勘测设计院集团有限公司 | Multi-girder section steel-doublelayer concrete bridge deck composite beam implementing technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111749117A (en) * | 2020-06-18 | 2020-10-09 | 苏交科集团股份有限公司 | Dumbbell-shaped stud shear connector and construction method thereof |
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Application publication date: 20181019 |