CN207878254U - A kind of assembled light combination beam freely-supported structure changes continuous structure - Google Patents
A kind of assembled light combination beam freely-supported structure changes continuous structure Download PDFInfo
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- CN207878254U CN207878254U CN201820091604.5U CN201820091604U CN207878254U CN 207878254 U CN207878254 U CN 207878254U CN 201820091604 U CN201820091604 U CN 201820091604U CN 207878254 U CN207878254 U CN 207878254U
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Abstract
The utility model provides a kind of assembled light combination beam freely-supported structure changes continuous structure, including being oppositely arranged two across the light-duty combination simply supported beam prefabricated unit of steel and ultra-high performance concrete and being set to cast-in-place ultra-high performance concrete pier top crossbeam between the two, prefabricated unit includes multiple steel I-beams, floorings on steel I-beam and the interconnecting piece set on steel I-beam end, interconnecting piece includes the first connecting portion for being set to prefabricated unit end and the second connecting portion on another prefabricated unit, first connecting portion forms pier top crossbeam with the cast-in-place ultra-high performance concrete of second connecting portion mating area.The freely-supported structure changes continuous structure of the utility model solves the problems, such as the easy crack in tension of traditional steel reinforced concrete combination continuous beam the decking in the negative moment region and the easy unstability of girder steel compression, the durability of Continuous Bridge is more preferable, the service life is longer, it can realize that scene zero is welded simultaneously, reduce field operation amount, the assembly rate for improving structure, convenient for assembling, rapid construction.
Description
Technical field
The present invention relates to a kind of bridge member and its technical field of construction, especially a kind of assembled light combination beam freely-supported
Structure changes continuous structure and its construction method.
Background technology
Currently, assembled steel-concrete composite beam is because can make full use of the performance of steel tension, the property of concrete compression
Can, and be more and more widely used.But it will produce concrete in tension, the unfavorable feelings that girder steel is pressurized in hogging moment region
Condition, serviceability limit stage, concrete slab is easy to crack, reduces combination beam rigidity, influences safety and the durability of structure.It is right
For workability, in assembled steel-concrete composite beam, floorings are partial precast, pour floorings seam workload
Greatly, site operation heavy workload.In addition, it is to solve hogging moment area concrete in tension that conventional steel-, which mixes composite continuous bridge, girder steel by
The problem of pressure, usually uses and cast-in-place concrete is arranged at pier top compressive region girder steel, and pier top tension floorings are arranged by a variety of constructions
It applies（Stretch-draw prestressing force, adjustment concrete slab pour order, using temporary support etc.）To reduce the tensile stress of concrete slab
Level increases the field operation amount of composite bridge, reduces assembly rate.
The light-duty combination beam of steel-ultra-high performance concrete has from heavy and light, intensity is high, durability is good, structure height is low, assembly
The high advantage of rate is, it can be achieved that girder one-pass molding, and integral prefabricated and lifting, the harsh Clearance requirement of adaptation Urban Bridge can
The interference to existing traffic under bridge is reduced as far as possible, is had broad application prospects.There to be excellent tensile property（Compared with high tensile
Intensity and the Crack Control ability stablized）Ultra-high performance concrete be used for concrete in tension zone floorings, be expected to solve coagulation
Native floorings problem easy to crack.
Publication No. is that the patent of invention of 106049255 A of CN discloses a kind of light-duty combination beam of steel-ultra-high performance concrete
Simply supported non-uniform structure constructs and its construction method, the construction include be oppositely arranged two across simply supported beam and connection two across simply supported beam
Cast-in-place ultra-high performance concrete interconnecting piece, simply supported beam includes diaphragm, floorings and double steel I-beams, is set on double steel I-beams
There are endplate, endplate to be welded on web and steel I-beam lower flange, cast-in-place ultra-high performance concrete interconnecting piece portion envelops
Web.The stressing conditions of the hogging moment area of the construction are improved, still, prefabricated unit both ends include width be 0.25 ~
0.3m diaphragms increase prefabricated unit lifting weight, and it connects the table that reinforcing bar is connected to lower flange by welding
On face, there are problems that process is complicated, reduces Standard, in addition its double support design can under carload effect
Can there are problems that negative reaction.
Invention content
It provides a kind of easy for construction the purpose of the present invention is overcoming the above-mentioned insufficient of the prior art, and avoids the occurrence of bearing
The assembled light combination beam freely-supported structure changes continuous structure and its construction method of negative reaction problem, it is mixed using steel-very-high performance
Solidifying soil is composed, and the stressing conditions of the hogging moment area of the structure continuous structure bridge are improved, and concrete slab is not easy
Cracking, girder steel Compression Stability problem are resolved, and durability is more preferable, and the service life is longer, while can realize that scene zero is welded, and are subtracted
Few field operation amount, improves the assembly rate of structure, convenient for assembling, rapid construction.
The technical scheme is that：A kind of assembled light combination beam freely-supported structure changes continuous structure, including set relatively
Two set are across the light-duty combination simply supported beam prefabricated unit of steel-ultra-high performance concrete and are set to cast-in-place very-high performance between the two
Concrete pier head piece, the prefabricated unit include multiple steel I-beams, the floorings on steel I-beam and be set to I-shaped
The interconnecting piece of girder steel beam-ends, the interconnecting piece include being set to the first connecting portion of prefabricated unit end and pre- set on another
Second connecting portion on unit processed, first connecting portion include the first cross connecting plate, first be arranged on the first cross connecting plate
Diaphragm plate, each steel I-beam center of first connecting portion upper edge are symmetrical arranged even number first longitudinal direction connecting plate, and first is horizontal
It is concordant with first longitudinal direction connecting plate end to connecting plate；Second connecting portion includes the second cross connecting plate, the second cross connecting plate
Second diaphragm plate of upper setting, each steel I-beam center of second connecting portion upper edge are symmetrical arranged odd number second longitudinal direction and connect
Fishplate bar, second longitudinal direction connecting plate are stretched out relative to the second cross connecting plate；First connecting portion cooperatively forms mixed with second connecting portion
Solidifying knoll head piece casting area, and cast-in-place ultra-high performance concrete forms pier top crossbeam.
The continuous structure of the present invention can give full play to the pull resistance of ultra-high performance concrete excellent compressive property and steel
Can, not only solve concrete slab easy crack in tension in hogging moment area in whole stress, girder steel is pressurized easily and stable ask occurs
The problem of topic also conveniently brings great convenience in workability, reduces field operation amount as far as possible, improve assembled
The assembly rate of the light-duty combination beam of steel-ultra-high performance concrete.
The interconnecting piece of steel I-beam, floorings and prefabricated unit end is in factory's one-pass molding, integral prefabricated formation, knot
Structure has preferable globality, saves steel using amount, and greatly reduce the field operation amount in work progress, ensure that structure
The workmanship of part, and then the stress performance for the freely-supported structure changes continuous structure provides guarantee.
First connecting portion and second connecting portion can reinforce the lateral ties of the two neighboring steel I-beam, and as the letter
The side form and bed die of the cast-in-place ultra-high performance concrete of branch structure changes continuous structure are to facilitate construction.First connecting portion and the second connection
Portion is preferably connected to steel I-beam end by welding.
Preferably, cast-in-place ultra-high performance concrete pier top beam width is 300 ~ 500 mm.
Further, the steel I-beam includes web, set on the upper limb wing on web top and the lower edge wing of lower part.
Preferably, steel I-beam each section to be formed by welding to be formed or directly processed using hot rolling i shaped steel, into one
Step ensures the workmanship of component.
Further, the second connecting portion corresponds to the second longitudinal direction connecting plate at each steel I-beam center by the side I-steel
Beam web is stretched out towards second connecting portion.First longitudinal direction connecting plate by be welded to connect be fixed on the first cross connecting plate and
On first diaphragm plate, first longitudinal direction connecting plate length is 200 ~ 400 mm.Other second longitudinal direction connecting plates are solid by being welded to connect
It is scheduled on the second cross connecting plate and the second diaphragm plate.Second longitudinal direction connecting plate length is 200 ~ 400 mm.
The setting of longitudinally connected plate can reinforce the longitudinally connected of prefabricated unit and cast-in-place ultra-high performance concrete, convenient for assembly
Change adjacent prefabricated unit matching construction when construction.When first connecting portion and second connecting portion cooperatively form cast-in-place region, first
Longitudinally connected plate connect Board position with second longitudinal direction and interlocks, the portion that second longitudinal direction connecting plate is stretched out relative to the second cross connecting plate
Divide and be snapped between adjacent first longitudinal direction connecting plate, keeps the support force of cast-in-place ultra-high performance concrete stronger.
Further, the steel I-beam lower edge wing opposing connections stretch out, with the first cross connecting plate of interconnecting piece or the
Two cross connecting plate length are concordant.
Specifically, the steel I-beam lower edge wing is stretched out relative to the first diaphragm plate or the second diaphragm plate, the first cross connecting plate
Or second cross connecting plate respectively include that the coupling part among the lower edge wing that adjacent steel I-beam stretches out and I-steel is arranged
The coupling part at beam both ends；Between coupling part and the steel I-beam lower edge wing and between diaphragm plate by welding manner into
Row connection forms whole；The width of wherein the first cross connecting plate is preferably 300 ~ 450 mm, the width of the second cross connecting plate
Preferably 150 ~ 300 mm.Connecting plate can not only play the lateral stressed effect for reinforcing steel I-beam, be also used as pier
Push up the bed die of the cast-in-place ultra-high performance concrete pier top crossbeam of hogging moment.
Preferably, the first cross connecting plate and the second cross connecting plate have the first diaphragm plate and the second diaphragm plate to separate respectively
At the inside region close to steel I-beam and the lateral area close to longitudinally connected plate, wherein the inside of the first cross connecting plate
Width is 80 ~ 120 mm, and outside width is 200 ~ 320 mm, and the inboard width of the second cross connecting plate is 80 ~ 120 mm, outside
Width is 100 ~ 180 mm.
First diaphragm plate or the second diaphragm plate respectively include being arranged partition part among adjacent steel I-beam web and
The partition part of steel I-beam web outside, partition part and steel I-beam web, the lower edge wing and the first cross connecting plate or the
It is whole that two cross connecting plates connect formation by welding.
Further, the first cross connecting plate of steel I-beam exterior portion of the first connecting portion and second connecting portion,
Bolt hole is offered on two cross connecting plates, the first diaphragm plate and the second diaphragm plate, the radius of bolt hole is preferably 5 ~ 30 mm,
The setting of hole connects convenient for combining the transverse direction of simply supported beam prefabricated unit by bolt other assembled lights adjacent with direction across bridge
Fishplate bar or diaphragm plate are connected, and ensure the density that the cast-in-place ultra-high performance concrete of pier top crossbeam pours, convenient for applying for combination beam
Work reduces Contraction in Site amount.
Further, the first longitudinal direction connecting plate is provided in the junction with the first cross connecting plate and the first diaphragm plate
Hole；In second connecting portion, web with respect to the second diaphragm plate stretching at, the second diaphragm plate bottom be arranged hole, web stretch out
Locate both sides other second longitudinal direction connecting plates disposed in parallel with the junction of the second cross connecting plate and the second diaphragm plate to be arranged
Hole.The radius of hole is 50~150mm, during cast-in-place ultra-high performance concrete, the concrete of different separated regions
Connected by hole it is one whole, to ensure density that cast-in-place concrete pours.
Further, the top and bottom that first diaphragm plate is connect with steel I-beam web are respectively equipped with hole, and second
The top and bottom that diaphragm plate is connect with steel I-beam web are respectively equipped with hole, to effectively avoid diaphragm plate, longitudinally connected
The a plurality of weld seam of plate and web weld intersects.
Further, it is fixedly installed shear connector on the steel I-beam upper limb wing, floorings pass through shear connector
It is connect with the steel I-beam upper limb wing, shear connector is provided on interconnecting piece.
Preferably, the specific location of shear connector setting is the steel I-beam upper limb wing, the first diaphragm plate is indulged towards first
It is connected to connecting plate side, the first cross connecting plate upside, first longitudinal direction connecting plate both sides, the second diaphragm plate towards second longitudinal direction
On the upside of plate side, the second cross connecting plate and second longitudinal direction connecting plate both sides.
Preferably, shear connector form is socket cap weldering nail, and the height of socket cap weldering nail is 40 ~ 150 mm, adjacent circle
Column cap weldering nail spacing be 100 ~ 400 mm, this setting can make between ultra-high performance concrete and steel plate combine it is even closer,
It avoids that delamination sliding phenomenon occurs.
Further, the floorings upper limb is provided with notch, pre-buried in notch to be provided with upper limb longitudinal direction embedded ribs, and leads to
The floorings upper limb longitudinal direction embedded ribs binding for crossing dowel and contiguous prefabricated unit connects integral force structure.It is making full use of
On the basis of the excellent tensile property of ultra-high performance concrete, which further enhances pier top ultra-high performance concrete interconnecting piece
Bending resistance draw performance and be convenient for site operation, can effectively solve freely-supported structure changes continuous structure pier top hogging moment area concrete bridge deck
The problem of the easy crack in tension of plate.
Further, the lower edge longitudinal direction embedded ribs of part stretching, adjacent two prefabricated unit are additionally provided on the floorings
Lower edge longitudinal direction embedded bar interlaced arrangement, to further strengthen the longitudinally connected and whole stress of floorings.
Further, ultra-high performance concrete is Reactive Powder Concrete of the compression strength not less than 100MPa, very-high performance
Fibre reinforced concrete is closely knit with rib reinforced composite material etc..Ultra-high performance concrete is more easily implemented assembled steel-very-high performance
The lightweight of concrete light combination simply supported beam, high intensity, high rigidity.
The construction method of the present invention, includes the following steps：
S1：The light-duty combination simply supported beam prefabricated unit of the assembled steel-ultra-high performance concrete that is prefabricated in the factory, specific steps
For：
S1.1：It is wing at steel I-beam in factory's welding web, the upper limb wing, lower edge, or directly use market finished product hot rolling
I shaped steel is processed to form steel I-beam；
S1.2：Two steel I-beams are arranged in parallel and are fixed temporarily, and first connecting portion or second connecting portion are connected
It is fixed on the end of two steel I-beams；
S1.3：Shearing is welded in the corresponding position of the steel I-beam upper limb wing, first connecting portion and second connecting portion
Connector；
S1.4：In the top formwork erection and binding floorings muscle of the steel I-beam, ultra-high performance concrete is then poured,
And it is conserved in time；
S1.5：When pouring ultra-high performance concrete and reaching design requirement, form removal, storage to designated position is formed
The prefabricated assembled light-duty combination beam prefabricated unit of steel-ultra-high performance concrete.
S2：Set up at the construction field (site) be oppositely arranged by the prefabricated obtained prefabricated units of the S1, connect first connecting portion
It is oppositely arranged with two prefabricated units of second connecting portion, first connecting portion and second connecting portion is made to cooperatively form cast-in-place superelevation
It can concrete pier head piece region；
S3：The upper limb longitudinal direction embedded ribs of two neighboring prefabricated unit are bound with dowel, and pay attention to lower edge longitudinal direction embedded ribs
It is horizontal to form pier top in cast-in-place ultra-high performance concrete pier top crossbeam region cast in situs ultra-high performance concrete in interlaced arrangement
Beam；
S4：Cast-in-place pier top crossbeam is conserved, system transform is carried out after reaching design strength, makes the assembly being oppositely arranged
The light-duty combination beam of formula-ultra-high performance concrete becomes beam structure from simple beam structure；
S5：After system transform, the construction of appurtenant work and deck paving is carried out, that is, completes the assembled light combination
The construction of beam freely-supported structure changes continuous structure.
Beneficial effects of the present invention：
（1）Steel I-beam and floorings one-pass molding, integral prefabricated in factory in the present invention so that combination beam has more preferable
Globality, save steel using amount, reduce the program carried out at the construction field (site), ensure that the workmanship of component, while can save
Save the dosage of steel.
（2）Reliable superelevation is arranged using ultra-high performance concrete, pier top in pier top the decking in the negative moment region in the present invention
Energy concrete lateral ties, the examining tensile behavior that can not only make full use of ultra-high performance concrete excellent solve the mixed combination of traditional steel-
The problem of the easy crack in tension of negative moment section of beam concrete slab can also make full use of excellent compression of ultra-high performance concrete
Can, reinforce hogging moment girder steel Compression Stability performance, avoid hogging moment girder steel unstability, to fully improve continuous composite beam bear it is curved
The stressing conditions of square extend the service life of continuous bridge structure construction.
（3）Structure continuous structure after elder generation's freely-supported of the present invention, main construction procedure are completed in pre-fabricated factory, existing factory
It only needs to bind a small amount of reinforcing bar, is not necessarily to welded reinforcement, then pours ultra-high performance concrete, field operation amount is few, assembly
Rate is high.
（4）The light-duty combination beam freely-supported structure changes continuous structure of assembled steel-ultra-high performance concrete of the present invention can
The construction equipment and construction technology that combination beam is mixed using existing steel-, without increasing new equipment investment, without to construction personnel
New skills training is carried out, construction method is easy, quick.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of assembled light combination beam freely-supported structure changes continuous structure of the present embodiment；
Fig. 2 is the structural schematic diagram of first connecting portion in Fig. 1；
Fig. 3 is the structural schematic diagram of second connecting portion in Fig. 1；
Fig. 4 is that first connecting portion and second connecting portion are used cooperatively schematic diagram；
Fig. 5 is the structural schematic diagram of prefabricated unit where first connecting portion；
Fig. 6 is the structural scheme of mechanism of prefabricated unit where second connecting portion.
In figure：1-prefabricated unit, 2-pier top crossbeams, 3-steel I-beams, the 3-1-upper limb wing, 3-2-web, 3-3-
The lower edge wing, 4-floorings, 4-1-notch, 4-2-upper limb longitudinal direction embedded bar, 4-3-lower edge longitudinal direction embedded bar, 4-4-
Connect reinforcing bar, 5-first connecting portions, the first cross connecting plates of 5-1-, the first diaphragm plates of 5-2-, 5-3-first longitudinal direction connection
Plate, 6-second connecting portions, the second cross connecting plates of 6-1-, the second diaphragm plates of 6-2-, 6-3-second longitudinal direction connecting plate, 7-
Shear connector, 8-bolts hole.9-holes.
Specific implementation mode
The present invention is described in further details below with reference to Figure of description and specific embodiment.
Embodiment 1
A kind of assembled light combination beam freely-supported structure changes continuous structure of the present embodiment, including be oppositely arranged two across steel-
The light-duty combination simply supported beam prefabricated unit of ultra-high performance concrete 1 and it is set to cast-in-place ultra-high performance concrete pier top between the two
Crossbeam 2, each prefabricated unit 1 include 2 steel I-beams 3 disposed in parallel, the floorings 4 on steel I-beam 3 and are set to
The interconnecting piece of 3 end of steel I-beam, the interconnecting piece include being set to the first connecting portion 5 of 1 end of prefabricated unit and being set to
Second connecting portion 6 on another prefabricated unit 1, first connecting portion 5 cooperatively form concrete pier head piece with second connecting portion 6
2 casting area, and cast-in-place ultra-high performance concrete forms pier top crossbeam 2.
Light-duty 1 standard span of combination simply supported beam prefabricated unit of assembled steel-ultra-high performance concrete of the present embodiment is
30m is highly 1.0m, width 3.0m, the vertical bridge of pier top crossbeam 2 to thickness be 0.4m.
Steel I-beam 3 includes web 3-2, set on the upper limb wing 3-1 on the tops the web 3-2 and lower edge wing 3-3 of lower part, is passed through
It being welded, 3 height of steel I-beam is 880mm, and web 3-2 thickness is 16mm, is highly 848mm, top flange thickness 12mm,
Width is 300mm, lower flange thickness 20mm, width 500mm, between the center of 2 steel I-beams 3 of same prefabricated unit 1
Away from for 1800mm.
The lower edge wing 3-3 of one prefabricated unit 1 stretches out, and the first diaphragm plate 5-2 is welded on 3 end of steel I-beam, and first is horizontal
It by lower edge wing 3-3 extensions and is welded between 23 lower edge wing 3-3 of steel I-beam and under steel I-beam 3 to connecting plate 5-1
The board group of edge of a wing both sides is at the first cross connecting plate 5-1 is separated into towards the inside at steel I-beam 3 by the first diaphragm plate 5-2
Exterior portion at part and separate steel I-beam 3.2 group first disposed in parallel is also fixedly welded on first diaphragm plate 5-2
Longitudinally connected plate 5-3, every group of first longitudinal direction connecting plate 5-3 are to be connect with the first diaphragm plate 5-2 along 3 web 3-2 of steel I-beam
Locate symmetrically arranged 2, the first longitudinal direction ends connecting plate 5-3 are concordant with the first cross connecting plate 5-1 exterior portions end.First
Cross connecting plate 5-1 width is 400 mm, and the inboard portion width at steel I-beam 3 is 100mm, close to steel I-beam 3
The exterior portion width at place is 300 mm, and thickness is identical as 3 lower edge wing 3-3 thickness of steel I-beam.
The web 3-2 and lower edge wing 3-3 of another prefabricated unit 1 stretch out, and the second diaphragm plate 6-2 is welded on 2 I-shapeds
Between 3 web 3-2 of girder steel and on the outside of web 3-2, second longitudinal direction connecting plate 6-3 is that web 3-2 is stretched out with respect to the second diaphragm plate 6-2
Part, the second cross connecting plate 6-1 include lower edge wing 3-3 extensions and be welded on 23 lower edge wing 3-3 of steel I-beam it
Between and lower edge wing 3-3 on the outside of part, the second cross connecting plate 6-1 is separated into towards at steel I-beam 3 by the second diaphragm plate 6-2
Inboard portion and principle steel I-beam 3 at exterior portion.The width of second cross connecting plate 6-1 is 200mm, close to I-shaped
Inboard portion width at girder steel 3 is 100mm, and the exterior portion width at steel I-beam 3 is 100 mm, thickness and work
3 lower edge wing 3-3 thickness of word girder steel is identical, 3 web 3-2 extensions length of steel I-beam, 300 mm.
First diaphragm plate 5-2 and the second diaphragm plate 6-2 thickness are, highly highly consistent with web 3-2.
First diaphragm plate 5-2 and the second diaphragm plate 6-2 are provided with shear connector 7, Shear connection far from 3 side of steel I-beam
7 form of part is socket cap weldering nail, and the highly preferred of socket cap weldering nail is 100 mm, and the spacing of adjacent column head weldering nail is preferably
200 mm。
First longitudinal direction junction steel plate and the both sides second longitudinal direction connecting plate 6-3 are welded with shear connector 7, shear connector 7
It welds and follows closely for socket cap, be in interlaced arrangement, the highly preferred of socket cap weldering nail is 60 mm, and adjacent column head weldering nail spacing is 150
mm。
The exterior portion upper surface of first cross connecting plate 5-1 and the second cross connecting plate 6-1 are provided with shear connector
7, shear connector 7 is socket cap weldering nail, is in interlaced arrangement, the highly preferred of socket cap weldering nail is 80 mm, the weldering of adjacent column head
Nail spacing is 200 mm.
First diaphragm plate 5-2, the first cross connecting plate 5-1, the second diaphragm plate 6-2, the second outsides cross connecting plate 6-1 are
Bolt hole 8 is offered, 8 radius of bolt hole is 12mm.
The first longitudinal direction connecting plate 5-3 is arranged with the junction of the first cross connecting plate 5-1 and the first diaphragm plate 5-2
The radius of hole 9, hole 9 is 100mm；In second connecting portion, second longitudinal direction connecting plate 6-3 is web 3-2 with respect to the second cross
Partition board 6-2 extensions, the second bottoms diaphragm plate 6-2 of the web extending area left and right sides are both provided with hole 9, hole 9
Radius is 50mm.
Floorings 4 are set to the top of steel I-beam 3, and are connect with steel I-beam 3 by shear connector 7, floorings 4
Thickness is 120mm, and floorings 4 are set as band notch 4-1 in 1 both ends floorings of prefabricated unit, 4 upper limb and construct, pre- in notch 4-1
It is embedded to be equipped with 4 upper limb longitudinal direction embedded bar 4-2 of floorings, and by connecting reinforcing bar 4-4 and vertical bridge to adjacent prefabricated unit 1
Floorings 4 upper limb longitudinal direction embedded bar 4-2 bindings connect integral force structure.1 both ends floorings of prefabricated unit, 4 lower edge is arranged
There is a lower edge longitudinal direction embedded bar 4-3, and stretched out from 4 end lower edge part of floorings, and with vertical bridge to the bridge of contiguous prefabricated unit 1
4 lower edge longitudinal direction embedded bar 4-3 of panel is in interlaced arrangement.
The light-duty combination simply supported beam prefabricated unit of assembled steel-ultra-high performance concrete 1 is oppositely arranged, a prefabricated unit 1
First connecting portion 5 and the second connecting portion of another prefabricated unit 16 are mutually matched, and the first cross connecting plate 5-1 and second laterally connects
Fishplate bar 6-1 contacts, second longitudinal direction connecting plate 6-3 is with respect to one group of first longitudinal direction of partial insertion that the second cross connecting plate 6-1 stretches out
It is horizontal that cast-in-place ultra-high performance concrete pier top is collectively formed in region between connecting plate 5-3, first connecting portion 5 and second connecting portion 6
2 region of beam forms cast-in-place ultra-high performance concrete pier top crossbeam 2, width 400mm after cast-in-place ultra-high performance concrete.
Floorings 4 and cast-in-place ultra-high performance concrete pier top crossbeam 2 are poured by ultra-high performance concrete, the present embodiment
Ultra-high performance concrete be very-high performance fibre reinforced concrete.
The construction method of the assembled light combination beam freely-supported structure changes continuous structure, includes the following steps：
S1：The light-duty combination simply supported beam prefabricated unit 1 of the assembled steel-ultra-high performance concrete that is prefabricated in the factory, it is specific to walk
Suddenly it is：
S1.1：Steel I-beam 3 is formed, or directly uses city in factory welding web 3-2, upper limb wing 3-1, lower edge wing 3-3
Field finished product hot rolling I-shaped is processed to form steel I-beam 3；
S1.2：Two steel I-beams 3 are arranged in parallel and are fixed temporarily, and first connecting portion 5 or second connecting portion 6 are connected
It connects and is fixed on the end of two steel I-beams 3；
S1.3：It is welded in the corresponding position of the 3 upper limb wing 3-1 of steel I-beam, first connecting portion 5 and second connecting portion 6
Connect shear connector 7；
S1.4：In the top formwork erection and binding 4 muscle of floorings of the steel I-beam 3, very-high performance coagulation is then poured
Soil, and conserved in time；
S1.5：When pouring ultra-high performance concrete and reaching design requirement, form removal, storage to designated position is formed
The light-duty combination beam prefabricated unit of prefabricated assembled steel-ultra-high performance concrete 1.
S2：Set up at the construction field (site) be oppositely arranged by the prefabricated obtained prefabricated units 1 of the S1, connect first connecting portion
5 and two prefabricated units 1 of second connecting portion 6 be oppositely arranged, so that first connecting portion 5 and second connecting portion 6 is cooperatively formed cast-in-place
2 region of ultra-high performance concrete pier top crossbeam；
S3：The upper limb longitudinal direction embedded ribs of two neighboring prefabricated unit 1 are bound with dowel, and pay attention to lower edge longitudinal direction embedded ribs
It is horizontal to form pier top in 2 region cast in situs ultra-high performance concrete of cast-in-place ultra-high performance concrete pier top crossbeam in interlaced arrangement
Beam 2；
S4：Cast-in-place pier top crossbeam 2 is conserved, system transform is carried out after reaching design strength, makes the dress being oppositely arranged
Beam structure is become from simple beam structure with formula-ultra-high performance concrete light-duty combination beam；
S5：After system transform, the construction of appurtenant work and deck paving is carried out, that is, completes the assembled light combination
The construction of beam freely-supported structure changes continuous structure.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of assembled light combination beam freely-supported structure changes continuous structure, including two be oppositely arranged are mixed across steel-very-high performance
It coagulates the light-duty combination simply supported beam prefabricated unit of soil and is set to cast-in-place ultra-high performance concrete pier top crossbeam between the two, it is described pre-
Unit processed includes multiple steel I-beams, the floorings on steel I-beam and the interconnecting piece set on steel I-beam end, described
Interconnecting piece includes the first connecting portion for being set to prefabricated unit end and the second connecting portion on another prefabricated unit,
It is characterized in that：First connecting portion includes being connected to the first cross connecting plate and of between steel I-beam and steel I-beam both sides
One diaphragm plate, each steel I-beam center of first connecting portion upper edge are symmetrical arranged even number first longitudinal direction connecting plate；Second
Interconnecting piece includes the second cross connecting plate and the second diaphragm plate for being connected between steel I-beam and steel I-beam both sides, and second connects
The each steel I-beam center of socket part upper edge is symmetrical arranged odd number second longitudinal direction connecting plate；First connecting portion is connect with second
Portion cooperatively forms concrete pier head piece casting area, and cast-in-place ultra-high performance concrete forms pier top crossbeam.
2. a kind of assembled light combination beam freely-supported structure changes continuous structure as described in claim 1, it is characterised in that：First
Cross connecting plate is concordant with first longitudinal direction connecting plate end, and second longitudinal direction connecting plate is stretched out relative to the second cross connecting plate, or
The second cross connecting plate of person is concordant with second longitudinal direction connecting plate end, and first longitudinal direction connecting plate is stretched relative to the first cross connecting plate
Go out.
3. a kind of assembled light combination beam freely-supported structure changes continuous structure as claimed in claim 1 or 2, it is characterised in that：
The steel I-beam includes web, set on the upper limb wing on web top and the lower edge wing of lower part.
4. a kind of assembled light combination beam freely-supported structure changes continuous structure as claimed in claim 3, it is characterised in that：It is described
The second longitudinal direction connecting plate that second connecting portion corresponds to each steel I-beam center is connected by the side steel I-beam web towards second
Portion is stretched out.
5. a kind of assembled light combination beam freely-supported structure changes continuous structure as claimed in claim 3, it is characterised in that：It is described
The steel I-beam lower edge wing is stretched out relative to the first diaphragm plate or the second diaphragm plate, with the first cross connecting plate of interconnecting piece or second
Cross connecting plate length is concordant.
6. a kind of assembled light combination beam freely-supported structure changes continuous structure as described in claim 4 or 5, it is characterised in that：
First cross connecting plate, the second cross connecting plate, the first cross on the outside of the steel I-beam of the first connecting portion and second connecting portion
Bolt hole is offered on partition board and the second diaphragm plate；The first longitudinal direction connecting plate with the first cross connecting plate and the first tabula
Hole is arranged in the junction of plate；In second connecting portion, web with respect to the second diaphragm plate stretching at, the second diaphragm plate bottom setting
Hole, at web stretching both sides second longitudinal direction connecting plate disposed in parallel with the second cross connecting plate and the second diaphragm plate
Hole is arranged in junction.
7. a kind of assembled light combination beam freely-supported structure changes continuous structure as described in claim 4 or 5, it is characterised in that：
Shear connector is fixedly installed on the steel I-beam upper limb wing, floorings are connect by shear connector with the upper limb wing, even
Shear connector is provided in socket part.
8. a kind of assembled light combination beam freely-supported structure changes continuous structure as claimed in claim 1 or 2, which is characterized in that
The floorings upper limb is provided with notch, pre-buried in notch to be provided with upper limb longitudinal direction embedded ribs, and by dowel with it is adjacent
The floorings upper limb longitudinal direction embedded ribs binding of prefabricated unit connects integral force structure.
9. assembled light combination beam freely-supported structure changes continuous structure according to claim 8, which is characterized in that described
The lower edge longitudinal direction embedded ribs of part stretching are additionally provided on floorings, the lower edge longitudinal direction embedded bar of adjacent two prefabricated unit interlocks
Arrangement.
10. according to 1,2,4,5,9 any one of them assembled light combination beam freely-supported structure changes continuous structure of claim,
It is characterized in that, the ultra-high performance concrete is Reactive Powder Concrete of the compression strength not less than 100MPa, very-high performance fibre
Dimension enhancing concrete is closely knit with rib reinforced composite material.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108385503A (en) * | 2018-01-19 | 2018-08-10 | 湖南大学 | A kind of assembled light combination beam freely-supported structure changes continuous structure and its construction method |
| CN109440630A (en) * | 2018-11-21 | 2019-03-08 | 辽宁省交通规划设计院有限责任公司 | Freely-supported steel-mixes composite beam bridge beam-ends structure and its construction method |
| CN111395188A (en) * | 2020-04-02 | 2020-07-10 | 江西省高速公路投资集团有限责任公司 | Construction method of steel-concrete composite beam |
-
2018
- 2018-01-19 CN CN201820091604.5U patent/CN207878254U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108385503A (en) * | 2018-01-19 | 2018-08-10 | 湖南大学 | A kind of assembled light combination beam freely-supported structure changes continuous structure and its construction method |
| CN109440630A (en) * | 2018-11-21 | 2019-03-08 | 辽宁省交通规划设计院有限责任公司 | Freely-supported steel-mixes composite beam bridge beam-ends structure and its construction method |
| CN111395188A (en) * | 2020-04-02 | 2020-07-10 | 江西省高速公路投资集团有限责任公司 | Construction method of steel-concrete composite beam |
| CN111395188B (en) * | 2020-04-02 | 2021-05-04 | 江西省高速公路投资集团有限责任公司 | Construction method of steel-concrete composite beam |
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