CN208517806U - A kind of combined bridge improving shear connector fatigue life - Google Patents
A kind of combined bridge improving shear connector fatigue life Download PDFInfo
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- CN208517806U CN208517806U CN201820636060.6U CN201820636060U CN208517806U CN 208517806 U CN208517806 U CN 208517806U CN 201820636060 U CN201820636060 U CN 201820636060U CN 208517806 U CN208517806 U CN 208517806U
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- shear connector
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- girder
- fatigue life
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Abstract
The utility model discloses a kind of combined bridges for improving 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 one 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 preformed hole identical and one-to-one with shear connector number, and when concrete slab is placed on steel box-girder, each shear connector is respectively protruding into corresponding preformed hole；Epoxy resin mortar layer is perfused between each support board 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, which concentrates the stress of shear connector and concrete slab, to be improved, to effectively improve the fatigue life of shear connector.
Description
Technical field
The utility model relates to a kind of combined bridges for improving shear connector fatigue life.
Background technique
Steel-concrete combined structure bridge is an important branch in current science of bridge building, either across 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 when front axle beam innovation system
One of important directions.Wherein the active force 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 is easy to produce sliding and leads to fatigue rupture.
Utility model content
The utility model provides a kind of combined bridge for improving shear connector fatigue life, and which overcome background techniques
Existing deficiency.The technical solution adopted by the utility model to solve the technical problem is that:
A kind of combined bridge improving shear connector fatigue life, if it include several steel box-girders interconnected,
Dry 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 one 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 preformed hole identical and one-to-one with shear connector number, 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 is with a thickness of 5-15mm.
Among one preferred embodiment: being additionally provided with rubber pad, epoxy between each support board 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 include along bridge length direction extend bottom plate, 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: being connected between two neighboring steel box-girder by the second diaphragm plate.
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: being provided with deformed bar in the hogging moment area of concrete slab.
The technical program compared with the background art, it has the following advantages:
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 of connector and concrete slab, which is concentrated, to be 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 assembly efficiency.
2. epoxy resin mortar layer can guarantee effectively improving for the fatigue life of shear connector with a thickness of 5-15mm.
3. being additionally provided with rubber pad between each support board 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.
Detailed description of the invention
The utility model is described in further detail 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 embodiment
Please refer to Fig. 1 to Fig. 6, an a kind of preferred embodiment of the combined bridge for improving shear connector fatigue life, institute
A kind of combined bridge for the raising shear connector fatigue life stated, it includes several steel box-girders 10 interconnected, several
A shear connector 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 one first diaphragm plate 12 are fixedly connected with two girder steels 11, and each 11 top of 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 each 13 both ends of 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 include along bridge length direction extend bottom plate 14,14 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 one first diaphragm plate 12.
In the present embodiment, several steel box-girders 10 are arranged laterally at a spacing, horizontal by second between two neighboring steel box-girder 10
Partition 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 preformed hole 41 identical and one-to-one with 20 numbers of shear connector,
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 in such a way that tongue and groove connects, 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
There are significant difference, ultra-high performance concrete material can be reduced bridge floor and splits the mechanical property and normal concrete 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.The utility model is adopted
With rear combined techniques, the prefabricated of deformed bar is placed that is, reserving to be used in the precast section 42 of casting concrete floorings
Hole is mounted in pre-manufactured hole after precast section 42, which is transported to scene, to be combined with Cast-in-Situ Segment 43, then by deformed bar 44, and right
Deformed bar 44 applies prestressing force so that the hogging moment area of concrete slab is in preloading condition, can improve hogging moment area
Tension, compressive property.
Epoxy resin mortar layer 30 is perfused between each support plate 13 and concrete slab 40.In the present embodiment, epoxy
Screed 30 is with a thickness of 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 between adjacent steel box-girder 10 by the second diaphragm plate 16；
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 protrude 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 each 13 both ends of 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 concentrates the stress of shear connector and concrete slab to be improved, thus
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 assembly efficiency.
The above, only the utility model preferred embodiment, therefore, it cannot be limited according to, and the utility model is implemented
It is practical new to should still belong to this for range, i.e., equivalent changes and modifications made according to the scope of the patent of the utility model and the content of the manual
In the range of type covers.
Claims (8)
1. a kind of combined bridge for improving shear connector fatigue life, it is characterised in that: it includes that several are interconnected
Steel box-girder, 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 one 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 preformed hole identical and one-to-one with shear connector number, works as concrete bridge deck
Each shear connector is respectively protruding into corresponding preformed hole when plate is placed on steel box-girder；
Epoxy resin mortar layer is perfused between each support board ends and concrete slab.
2. a kind of combined bridge for improving shear connector fatigue life according to claim 1, it is characterised in that: epoxy
Screed is with a thickness of 5-15mm.
3. a kind of combined bridge for improving shear connector fatigue life according to claim 1 or 2, it is characterised in that:
Be additionally provided with rubber pad between each support board ends and concrete slab, epoxy resin mortar layer be located at rubber pad, support plate and
In the region that concrete slab surrounds.
4. a kind of combined bridge for improving shear connector fatigue life according to claim 1, it is characterised in that: steel case
Beam further includes the bottom plate extended along bridge length direction, and bottom plate both ends are connect with two girder steels respectively, is located between two girder steels
Bottom plate on be provided with it is multiple along bridge length direction extend longitudinal ribs.
5. a kind of combined bridge for improving shear connector fatigue life according to claim 1, it is characterised in that: adjacent
It is connected between two steel box-girders by the second diaphragm plate.
6. a kind of combined bridge for improving shear connector fatigue life according to claim 1, it is characterised in that: shearing
Connector is peg, and two pegs are welded in each support plate.
7. a kind of combined bridge of raising shear connector fatigue life, feature described according to claim 1 or 4 or 5 or 6
Be: concrete slab includes precast section and Cast-in-Situ Segment, is connected in such a way that tongue and groove connects between two neighboring precast section
Cast-in-Situ Segment, preformed hole are arranged in precast section.
8. a kind of combined bridge of raising shear connector fatigue life, feature described according to claim 1 or 4 or 5 or 6
It is: is provided with deformed bar in the hogging moment area of concrete slab.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820636060.6U CN208517806U (en) | 2018-04-28 | 2018-04-28 | A kind of combined bridge improving shear connector fatigue life |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820636060.6U CN208517806U (en) | 2018-04-28 | 2018-04-28 | A kind of combined bridge improving shear connector fatigue life |
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| CN208517806U true CN208517806U (en) | 2019-02-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108677683A (en) * | 2018-04-28 | 2018-10-19 | 华侨大学 | Improve the combined bridge and production method of shear connector fatigue life |
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2018
- 2018-04-28 CN CN201820636060.6U patent/CN208517806U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108677683A (en) * | 2018-04-28 | 2018-10-19 | 华侨大学 | Improve the combined bridge and production method of shear connector fatigue life |
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