CN209039974U - The crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings constructs - Google Patents
The crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings constructs Download PDFInfo
- Publication number
- CN209039974U CN209039974U CN201821575889.6U CN201821575889U CN209039974U CN 209039974 U CN209039974 U CN 209039974U CN 201821575889 U CN201821575889 U CN 201821575889U CN 209039974 U CN209039974 U CN 209039974U
- Authority
- CN
- China
- Prior art keywords
- floorings
- concrete
- freely
- composite beam
- continuous position
- 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.)
- Active
Links
Abstract
The utility model proposes a kind of crack resistence at freely-supported combined system composite beam bridge support floorings continuous position constructions, comprising: an at least block concrete prefabricated board, at least a block concrete prefabricated board are arranged between adjacent girder steel top flange；Multi-disc steel mesh, multi-disc steel mesh is arranged in the top layer of corresponding concrete prefabricated board, and reinforced mesh both ends should carry out default connection with the steel mesh in the floorings outside continuous structure region；Pouring concrete layer afterwards；Resistance to plucking not shear connector, shear connections are not arranged at the top of girder steel resistance to plucking, under vehicle-mounted operating condition, floorings tensile stress level to be below the maximum tension stress of concrete in target area, to place the cracking at the continuous position of floorings.Crack resistence construction can effectively discharge compound action, and lowering girder steel prevents the cracking of floorings to be effectively reduced the tensile stress level of floorings to the effect of contraction of floorings, improve the durability of floorings.
Description
Technical field
The utility model relates to technical field of structural engineering, in particular to a kind of freely-supported combined system composite beam bridge support bridge
The crack resistence at the continuous position of panel constructs.
Background technique
As shown in Figure 1, for the comfort for guaranteeing driving, simply supported beam mostly uses greatly the continuous structural form of bridge floor, that is, cancels
Intermediate warp seam, by floorings, continuous placing is integral near support.Meanwhile as shown in Fig. 2, due to the continuous structure,
It frequently can lead to floorings and bear very big hogging moment effect under operation state.In traditional design, often by adding
Nearby reinforcing bar inside floorings controls fracture width caused by hogging moment to close support, however, even if the crack of concrete
Width can be controlled, but under temperature action, shrinkage and creep and long-term reciprocal vehicle loading, floorings still have can not
The problem of Cracking avoided, to further result in the cracking of asphalt mixture surfacing, water will penetrate into concrete internal corrosion by crack
Reinforcing bar can penetrate into destruction support at bridge floor support, the endurance quality of bridge structure greatly reduces, also give the maintenance in later period
Reparation brings great difficulty.
Aiming at the problem that floorings crack because of compound action, a kind of effective solution method is provided in the related technology,
But the solution is main at present or is used for the hogging moment region of continuous composite beam, simple bridge continuous for floorings
Beam, there are no people to propose practical to practice method.Therefore, it is badly in need of a kind of effective structural form and cooperates such connector, and mentions
For corresponding construction method, to fundamentally control the cracking at the continuous position of floorings.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.
For this purpose, the purpose of this utility model is that proposing a kind of continuous portion of freely-supported combined system composite beam bridge support floorings
The crack resistence construction of position.
In order to achieve the above objectives, the utility model proposes the continuous positions of freely-supported combined system composite beam bridge support floorings
Crack resistence construction, comprising: an at least block concrete prefabricated board, an at least block concrete prefabricated board are arranged in adjacent
Between girder steel top flange, wherein the top dabbing of every block concrete prefabricated board, to enhance concrete joint surface product；Multi-disc reinforcing bar
Net, the multi-disc steel mesh is arranged in the top layer of corresponding concrete prefabricated board, and reinforced mesh both ends should be with continuous structure
The steel mesh in floorings outside region carries out default connection；Pouring concrete layer afterwards；Resistance to plucking not shear connector, the resistance to plucking is not
Shear connector is arranged at the top of girder steel, under vehicle-mounted operating condition, floorings tensile stress level to be below in target area
The maximum tension stress of concrete, to place the cracking at the continuous position of the floorings.
The crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings of the utility model constructs, by adopting
With continuous structure, and then the compound action of support nearby steel and concrete slab is effectively discharged, really realizes concrete cracking
Effectively control, lowering girder steel prevents bridge floor so that being effectively reduced the tensile stress level of floorings to the effect of contraction of floorings
The cracking of plate improves the durability of floorings.
Further, shear connector is not screw resistance to plucking not shear connector to the resistance to plucking, with laterally and/or longitudinally
Movable property is set to bridge floor, wherein the screw resistance to plucking not shear connector by screw rod, nut and external low elastic modulus material
Composition.
Further, the bottom level of at least one layer of steel mesh be higher than the resistance to plucking not shear connector top it is high
Degree.
Further, the rear pouring concrete layer is poured after the completion of discontinuous structure realm concreting.
Optionally, the thickness of an at least block concrete prefabricated board is in 10cm between 20cm, and every block concrete
Prefabricated board is configured with the reinforced mesh for being no less than one layer.
Optionally, the reinforced mesh spacing at the top of every block concrete prefabricated board is less than or equal to 10cm.
Optionally, the reinforced mesh uses Ribbed Bar, and bar diameter is greater than or equal to 10mm.
Further, the last layer concrete of the rear pouring concrete layer is ungauged regions slightly expanded concrete, and is limited swollen
Swollen rate is greater than 0.02%.
Further, the thickness of the last layer concrete adds prefabricated plate thickness equal with the thickness of position floorings.
The additional aspect of the utility model and advantage will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
The utility model is above-mentioned and/or additional aspect and advantage from the following description of the accompanying drawings of embodiments will
Become obvious and be readily appreciated that, in which:
Fig. 1 is that traditional system of simple supporting combines beam support floorings continuous structure schematic diagram nearby；
Fig. 2 is that traditional system of simple supporting combines beam support floorings top flange tensile stress distribution schematic diagram nearby；
Fig. 3 is the crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings of the utility model embodiment
Structural texture schematic diagram；
Fig. 4 is the crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings of the utility model embodiment
Concrete prefabricated board structural schematic diagram in construction；
Fig. 5 is the crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings of the utility model embodiment
Resistance to plucking in construction not shear connector structural schematic diagram.
Description of symbols:
The crack resistence construction at the continuous position of 10- freely-supported combined system composite beam bridge support floorings, 1- concrete prefabricated board,
2- steel mesh, 3- last layer concrete, 4- resistance to plucking not shear connector, 5- girder steel ,-common peg, 7- normal areas concrete
Plate, 8- bridge pad and 9- bridge pier.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
The freely-supported combined system composite beam bridge support bridge proposed according to the utility model embodiment is described with reference to the accompanying drawings
The crack resistence at the continuous position of panel constructs.
Fig. 3 is the anti-of the continuous position of freely-supported combined system composite beam bridge support floorings of the utility model one embodiment
Crack structural texture schematic diagram.
As shown in figure 3, the crack resistence construction 10 at the continuous position of freely-supported combined system composite beam bridge support floorings includes:
An at least block concrete prefabricated board 1, multi-disc steel mesh 2, rear pouring concrete layer 3 and resistance to plucking not shear connector 4.
Wherein, as shown in figure 4, at least a block concrete prefabricated board 1 is arranged between adjacent girder steel top flange,
In, the top dabbing of every block concrete prefabricated board, to enhance concrete joint surface product.Multi-disc steel mesh 2 is arranged in correspondence
The top layer of concrete prefabricated board, and reinforced mesh both ends should be preset with the steel mesh in the floorings outside continuous structure region
Connection.Shear connector is not arranged at the top of girder steel resistance to plucking, to be used for the floorings tensile stress in target area under vehicle-mounted operating condition
Level is below the maximum tension stress of concrete, to place the cracking at the continuous position of floorings.The utility model embodiment is prevented
Cracking construction 10 to make materials conveniently, and simple structure, quick construction, stress is clearly reasonable, and construction quality is easily guaranteed, tool
There is good technical economic benefit.
It should be noted that the crack resistence of the utility model embodiment constructs, it is primarily adapted for use in system of simple supporting composite beam bridge
Nearby the continuous position of floorings is mainly used for support that is, suitable for the continuous system of simple supporting composite beam bridge of floorings after first freely-supported
Near support it is appropriate within the scope of, within the scope of this, by traditional Beams bridge common shear connector replace
For resistance to plucking not shear connector, it then is laid with concrete prefabricated board in the region, and in concrete prefabricated board surface configuration reinforcing bar
Then net pours the region concrete and forms floorings continuous structure.It is used at the continuous position of the support floorings of composite beam bridge
The crack resistence technology can effectively discharge the compound action in the region, lower girder steel to the effect of contraction of floorings, thus effectively
Ground reduces the tensile stress level of the region floorings, prevents the cracking of floorings, improves the durability of floorings.Meanwhile it being laid with
Concrete prefabricated board can be used as construction when after pouring concrete template, and have both stress effect, speed of application can be accelerated, together
When reduce construction cost, promote bridge floor performance.
Further, as shown in figure 5, in one embodiment of the utility model, shear connector 4 is not screw rod to resistance to plucking
Formula resistance to plucking not shear connector, is set to bridge floor with laterally and/or longitudinally movable property, wherein screw resistance to plucking not shearing resistance connects
Fitting is made of screw rod, nut and external low elastic modulus material.
Wherein, the thickness of external low elastic modulus material carries out true according to the maximum slippage that vehicle-mounted lower floorings may occur
It is fixed, and should have certain more than needed.
Further, in one embodiment of the utility model, the bottom level of at least one layer of steel mesh is higher than resistance to plucking
The not overhead height of shear connector.
Optionally, in one embodiment of the utility model, at least the thickness of a block concrete prefabricated board is in 10cm
To between 20cm, and every block concrete prefabricated board is configured with no less than one layer of reinforced mesh.
Optionally, in one embodiment of the utility model, between the reinforced mesh at the top of every block concrete prefabricated board
Away from less than or equal to 10cm.Wherein, reinforced mesh uses Ribbed Bar, and bar diameter is greater than or equal to 10mm.
It should be noted that concrete prefabricated board 1 should be shelved 3~6 months before use.
Further, in one embodiment of the utility model, rear pouring concrete layer is in discontinuous structure realm coagulation
Soil is poured after the completion of pouring.
Further, in one embodiment of the utility model, the last layer concrete of rear pouring concrete layer is no receipts
Miniature expansive concrete, and limited expansion rate is greater than 0.02%, the thickness of last layer concrete adds prefabricated plate thickness and position bridge
The thickness of panel is equal.
Wherein, the grade of last layer concrete is determined according to practical calculating at the top of concrete prefabricated board.
For example, in construction, existing girder steel top layout resistance to plucking not shear connector, then between girder steel
It is laid with concrete prefabricated board, answers appropriate dabbing at the top of concrete prefabricated board to enhance conjunction old and new concret area, reinforced mesh
Both ends are effectively connect with the steel mesh in the floorings outside continuous structure region, guarantee effective power transmission, pour it is outer its
Remaining region concrete and then the last layer concrete for pouring the continuum, last layer concrete ungauged regions microdilatancy coagulation
Soil, limited expansion rate should be greater than 0.02%.
Traditional crack resistence scheme can not fundamentally solve the problem of Cracking at the continuous position of floorings, can only pass through increasing
Arrangement of reinforcement is added to carry out the development of control bridge face fracture width, crack can all generate always, and a small amount of engineering practice is attempted near support
Using the better high-performance concrete material of tensile property, but it can greatly increase the material cost of bridge again and be constructed into
This.The continuous structure of the utility model embodiment on the basis of not increasing structural material cost and construction cost, from structure by
It sets out in power mechanism, by the compound action of steel and concrete slab near release support, be truly realized concrete cracking has
Effect control.In addition, because of the deformation of bottom girder steel cooperative transformation will not occur for floorings after using the continuous structure,
Therefore it there will not be any tensile stress to generate, since floorings part additionally uses prefabricated board, and be configured with steel in last layer
Muscle net, contraction and influence of the creep beharior to concrete slab near support also fall below minimum.
It should be noted that the aforementioned noun for referring to that spacing, strength grade of concrete etc. are similar, size is all in accordance with reality
Calculating is firmly believed, is not specifically limited herein.
Prevent at the continuous position of freely-supported combined system composite beam bridge support floorings proposed according to the utility model embodiment
Cracking construction by using continuous structure, and then effectively discharges the compound action of steel and concrete slab near support, really real
Effective control of existing concrete cracking lowers girder steel to the effect of contraction of floorings, so that the drawing for being effectively reduced floorings is answered
Power is horizontal, prevents the cracking of floorings, improves the durability of floorings.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention,
It is a, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field
For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (9)
1. a kind of crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings constructs characterized by comprising
An at least block concrete prefabricated board, an at least block concrete prefabricated board be arranged in adjacent girder steel top flange it
Between, wherein the top dabbing of every block concrete prefabricated board, to enhance concrete joint surface product；
Multi-disc steel mesh, the multi-disc steel mesh are arranged in the top layer of corresponding concrete prefabricated board, and reinforced mesh both ends
Default connection should be carried out with the steel mesh in the floorings outside continuous structure region；
Pouring concrete layer afterwards；And
Resistance to plucking not shear connector, shear connector is not arranged at the top of girder steel the resistance to plucking, under vehicle-mounted operating condition, mesh
Floorings tensile stress level is below the maximum tension stress of concrete in mark region, to place opening for the continuous position of the floorings
It splits.
2. the crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings according to claim 1 constructs,
It is characterized in that, shear connector is not screw resistance to plucking not shear connector to the resistance to plucking, with laterally and/or longitudinally movable
Property be set to bridge floor, wherein shear connector is not made of the screw resistance to plucking screw rod, nut and external low elastic modulus material.
3. the crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings according to claim 1 constructs,
It is characterized in that, the bottom level of at least one layer steel mesh is higher than the overhead height of the resistance to plucking not shear connector.
4. the crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings according to claim 1 constructs,
It is characterized in that, pouring concrete layer is poured after the completion of discontinuous structure realm concreting after described.
5. the crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings according to claim 1 constructs,
It is characterized in that, the thickness of an at least block concrete prefabricated board is in 10cm between 20cm, and every block concrete is prefabricated
Plate is configured with the reinforced mesh for being no less than one layer.
6. the crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings according to claim 5 constructs,
It is characterized in that, the reinforced mesh spacing at the top of every block concrete prefabricated board is less than or equal to 10cm.
7. the crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings according to claim 6 constructs,
It is characterized in that, the reinforced mesh uses Ribbed Bar, and bar diameter is greater than or equal to 10mm.
8. the crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings according to claim 1 constructs,
It is characterized in that, the last layer concrete of pouring concrete layer is ungauged regions slightly expanded concrete after described, and limited expansion rate is big
In 0.02%.
9. the crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings according to claim 8 constructs,
It is characterized in that, the thickness of the last layer concrete adds prefabricated plate thickness equal with the thickness of position floorings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821575889.6U CN209039974U (en) | 2018-09-26 | 2018-09-26 | The crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings constructs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821575889.6U CN209039974U (en) | 2018-09-26 | 2018-09-26 | The crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings constructs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209039974U true CN209039974U (en) | 2019-06-28 |
Family
ID=67034434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821575889.6U Active CN209039974U (en) | 2018-09-26 | 2018-09-26 | The crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings constructs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209039974U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951419A (en) * | 2018-09-26 | 2018-12-07 | 清华大学 | The crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings constructs |
| CN108951419B (en) * | 2018-09-26 | 2024-04-26 | 清华大学 | Anti-cracking structure of bridge deck continuous part of simply supported combined beam bridge support |
-
2018
- 2018-09-26 CN CN201821575889.6U patent/CN209039974U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951419A (en) * | 2018-09-26 | 2018-12-07 | 清华大学 | The crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings constructs |
| CN108951419B (en) * | 2018-09-26 | 2024-04-26 | 清华大学 | Anti-cracking structure of bridge deck continuous part of simply supported combined beam bridge support |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105839510B (en) | A kind of steel and ultra-high performance concrete composite continuous bridge structure and its construction method | |
| CN104831617B (en) | Steel-ultra-high performance concrete combination beam based on fin-plate type bridge floor and construction method | |
| CN104294748B (en) | A kind of hybrid beam cable-stayed bridge adapter section structure and construction method thereof | |
| US4991248A (en) | Load bearing concrete panel reconstruction | |
| CN106677049A (en) | Assembled steel-concrete combination structure bridge and construction method | |
| CN104612050B (en) | A kind of simply supported beam continuous new construction of bridge bridge floor and constructional method | |
| CN106638304A (en) | UHPC-common-concrete-lamination composite bridge-deck-slab construction and constructing method thereof | |
| CN106894347B (en) | A kind of splicing bridge and bridge reorganization and expansion method based on cast-in-place united layer supertronic | |
| CN105804769A (en) | Method for reinforcing tunnel lining through corrugated steel plate | |
| CN207973983U (en) | It can rapidly-assembled precast bridge | |
| CN108385503A (en) | A kind of assembled light combination beam freely-supported structure changes continuous structure and its construction method | |
| CN107587424A (en) | A kind of ultra-high performance concrete floorings | |
| CN108951399A (en) | A kind of Single-box multi-chamber box beam bridge and its construction method | |
| CN110258289A (en) | Prestressed concrete continuous box girder bridge laterally spells wide structure | |
| CN113322771B (en) | Seamless bridge structure based on ultrahigh-toughness cement-based composite material and construction method | |
| CN108035252A (en) | A kind of simply supported girder bridge panel continuous structure and its construction method | |
| CN207878254U (en) | A kind of assembled light combination beam freely-supported structure changes continuous structure | |
| CN103882797A (en) | Composite corrugated steel web box girder and construction technology thereof | |
| CN209039974U (en) | The crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings constructs | |
| CN209114299U (en) | A kind of Single-box multi-chamber box beam bridge | |
| CN109338899A (en) | A kind of the steel reinforced concrete combination beam and its construction method of weldless connection part | |
| CN205474785U (en) | Steel - ultra high performance concrete combination continuous bridge structure | |
| CN110409288A (en) | The shear connector and construction method of unidirectional slip | |
| CN108951419A (en) | The crack resistence at the continuous position of freely-supported combined system composite beam bridge support floorings constructs | |
| CN214882958U (en) | Steel-concrete combined bridge deck poured by concrete beams in separate bins |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |