CN207958968U - A kind of ultra-high performance concrete and regular reinforcement concrete combination beam - Google Patents
A kind of ultra-high performance concrete and regular reinforcement concrete combination beam Download PDFInfo
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- CN207958968U CN207958968U CN201721846306.4U CN201721846306U CN207958968U CN 207958968 U CN207958968 U CN 207958968U CN 201721846306 U CN201721846306 U CN 201721846306U CN 207958968 U CN207958968 U CN 207958968U
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Abstract
The utility model is related to structure-design technique fields, more particularly to a kind of ultra-high performance concrete and regular reinforcement concrete combination beam, including UHPC precast main beams, it is characterized in that, the prefabricated backs of UHPC preset shear connector, reinforced mesh after-pouring ordinary concrete is set in the UHPC precast beams apical margin, ordinary reinforced concrete floorings are poured after formation.The utility model has the advantages that component is light and handy, transporting and hoisting is simple, construction is convenient, can give full play to material stress performance, good economy performance.
Description
Technical field
The utility model is related to structure-design technique fields, and in particular to a kind of ultra-high performance concrete and regular reinforcement concrete
The combination beam of combination beam more particularly to a kind of UHPC precast beams and ordinary reinforced concrete floorings composition.
Background technology
Ultra-high performance concrete（Ultra-High Performance Concrete, abbreviation UHPC) it is a kind of from material
The various aspects such as composition, mix-design, microstructure are different from a kind of novel concrete sill of common high performance concrete,
With superhigh intensity, superhigh tenacity and superelevation durability.Be applied to bridge structure, will assign bridge structure component it is light and handy,
The advantages that transporting and hoisting is simple, construction is convenient, anti-seismic performance is good, durability is good, and substructure lightness can be pushed further into
Precast assembly designs, and adapts to the developing direction and trend of current Urban Bridge Construction, has broad application prospects.
The compression strength and tensile strength of UHPC materials are all far above normal concrete（Compression strength >=120Mpa, axle center
Tensile strength is up to 7 ~ 12MPa）.High intensity compared to UHPC, elasticity modulus are only 1.3 ~ 1.5 times of normal concrete,
About 4.5 ~ 5 × 104 Mpa, the about a quarter of steel elasticity modulus.Its tunneling boring is applied to by the bridge knot based on curved
When structure, since its elasticity modulus of materials is not high enough, compression strength is far above tensile strength, find to work as girder lower edge in structure design
Tensile region UHPC gives full play to its tensile strength and compressive region UHPC compression is anti-still far below it when tension reinforcement reaches surrender
Compressive Strength, the high compressive strength of compressive region UHPC fail to be not fully exerted.Simultaneously as UHPC material prices be apparently higher than it is general
Logical concrete, causes the economy of tunneling boring UHPC girders bad.It is one using UHPC-RC compound sections for this problem
A preferably solution.
External existing UHPC-RC combination beams form of fracture is that UHPC I-beams are combined with regular reinforcement concrete bridge plate
Beam, the UHPC precast H-beams edge of a wing is relatively narrow, needs separately to set the working measures such as falsework for floorings construction.
Therefore, those skilled in the art is dedicated to developing that a kind of component is light and handy, transporting and hoisting is simple, convenient, energy of constructing
Give full play to material stress performance, good economy performance bridge structure.
Utility model content
The purpose of this utility model be exactly in order to overcome the above-mentioned deficiencies of the prior art place and a kind of very-high performance is provided
Concrete and regular reinforcement concrete combination beam, transporting and hoisting light and handy with component is simply, construction is convenient, can give full play to material
The advantages of stress performance, good economy performance.
The utility model aim can be achieved through the following technical solutions：A kind of ultra-high performance concrete and regular reinforcement concrete
Combination beam, including UHPC precast beams, which is characterized in that the prefabricated backs of UHPC preset shear connector, pre- in the UHPC
Reinforced mesh after-pouring ordinary concrete is arranged in back edge processed, and ordinary reinforced concrete floorings are poured after formation.
Further, the UHPC precast beams are by room temperature maintaining ultra-high performance concrete or steam curing type very-high performance
Concrete for making.
Further, the UHPC precast beams form of fracture includes π shapes, T shapes or box-shaped.
Preferably, the UHPC precast beam sections of stating are π shape sections, compare tee-section, and the construction of π shape section precast beams is steady
It is qualitative preferable；For box section, the prefabricated beam prefabricated processing demoulding of π shape sections is more convenient, therefore for Mid and minor spans
For bridge, the form of fracture of π shape section precast beams is more excellent.
Further, the structural elements of the UHPC Prefabricated bar bodies configuration regular reinforcement, can further increase UHPC
The bending resistance of precast beam, ultimate shear-carrying capacity.
Further, the UHPC Prefabricated bar bodies are the structural elements for configuring deformed bar, can be further increased
The bending resistance of UHPC precast beams, ultimate shear-carrying capacity, and controllable tensile stress of the precast beam under normal operating condition.
Further, when the UHPC Prefabricated bar bodies configuration deformed bar, the UHPC precast beams can be first to open
Method or post-stressed component.
Further, the UHPC precast beams are that monolithic or multi-disc are arranged in direction across bridge.
Further, lateral connection structure is arranged in span centre and beam-ends when direction across bridge multi-disc is arranged in the UHPC precast beams
Part；The bearing distribution that can further improve after lateral connection component between multi-disc girder is set.
Further, when the UHPC precast beams direction across bridge multi-disc arrangement, UHPC precast beams are arranged in span centre or beam-ends
Lateral connection component includes but not limited to UHPC diaphragm plates, regular reinforcement concrete diaphragm plate, steel construction steel flanged beam or open web type tabula
Plate, steel pipe be horizontally-supported, horizontal prestressed draw-bar.
Further, the UHPC precast beams the preset shear connector of back include but not limited to rebar connector,
Structural steel connecting member.
Further, the regular reinforcement concrete bridge plate is that whole casts in situs or partial precast part are cast-in-place.
Further, the regular reinforcement concrete bridge plate is that direction across bridge uniform thickness is arranged or according to UHPC precast beam section features
And direction across bridge Varying-thickness is arranged.
Further, after the UHPC-RC combination beams application range includes but not limited to simply supported beam, continuous beam, first freely-supported
The stiff girder of continuous beam, Suo Cheng formula bridges.
Compared with prior art, the utility model has the advantage of：Compared to conventional prestressed concrete prefabricated small box girder or in advance
Stress concrete hollow board beam, UHPC-RC combined beam structures from heavy and light, transporting and hoisting is convenient, structure height is small, anti-seismic performance is more preferable,
Durability is more preferable；It compares and steel-concrete composite beams, UHPC-RC combination beams are more economical, late maintaining is at low cost；It is cut compared to complete
Face UHPC beams, UHPC-RC combination beams reduce the use of compressive region UHPC while making full use of the high-tensile of lower edge UHPC
Amount（UHPC superelevation compression strength tends not to give full play in Short/Medium Span Bridge）, instead regular reinforcement concrete, stress is more
Rationally, economy is more preferable；After pour reinforcing bar concrete bridge plate as compression flange, can by direction across bridge multi-disc UHPC precast beams connect altogether
While with stress, also serve as leveling layer of mating formation, further decrease structure height and dead weight, make organization plan it is more economical, it is energy saving,
Environmental protection.Compared to external existing UHPC I-beams and regular reinforcement concrete bridge plate combination beam, the utility model eliminates bridge
Panel construction formwork, construction are more convenient.
Description of the drawings
Fig. 1 is the first schematic cross-sectional view of the UHPC-RC combination beams of the utility model.
Fig. 2 is second of schematic cross-sectional view of the UHPC-RC combination beams of the utility model.
Fig. 3 is the third schematic cross-sectional view of the UHPC-RC combination beams of the utility model.
Fig. 4 is the first schematic cross-sectional view of the UHPC precast beams of the utility model.
Fig. 5 is second of schematic cross-sectional view of the UHPC precast beams of the utility model.
Fig. 6 is the third schematic cross-sectional view of the UHPC precast beams of the utility model.
Fig. 7 is the UHPC-RC combination beam elevational schematic views of the utility model.
Specific implementation mode
The feature of the utility model is described in further detail by embodiment below in conjunction with attached drawing, in order to the same industry
The understanding of technical staff：
Such as Fig. 1 ~ 2, figure acceptance of the bid note is respectively：UHPC precast beams 1, RC floorings concrete 2, UHPC precast beams preset Shear connection
The lateral connection component being arranged in span centre or beam-ends between UHPC precast beams when part 3, RC floorings reinforcing bar 4, direction across bridge multi-disc arrangement
5, the common arrangement of reinforcement 12 of UHPC precast beams, UHPC precast beams prestress reinforcement 13.
Embodiment：
A kind of ultra-high performance concrete (UHPC) and regular reinforcement concrete（RC）Composite bridge, structure is as shown in Figure 1,
The combination beam is formed with the connection of RC floorings 2 by the pre-buried shear connector 3 of setting by one or more pieces UHPC precast beams 1 and is combined
Reinforcing bar 4 is arranged in the common stress of section, wherein RC floorings.UHPC precast beams 1 can be used as RC floorings 2 and RC floorings arrangement of reinforcement 4
Operation platform, facilitate the construction of RC floorings.It, can be in the span centre between each precast beam when UHPC precast beam transverse direction multi-discs are arranged
Or lateral connection component 5 is arranged to enhance the bearing distribution between each precast beam in beam-ends.
The utility model can effectively play the high-tensile and superhigh tenacity of UHPC materials in girder structure, and subtract
The economy of UHPC dosage lift structures, operation principle are as follows in few structure：First, 1 prefabricated processing of UHPC precast beams, together
When in the pre-buried shear connector of back 3；It can need to determine whether common steel bar stress 12 is set in UHPC precast beams according to stress
And deformed bar 13, to further increase bending resistance, the shearing resistance stress performance of UHPC precast beams.Then UHPC precast beams are set up,
And construct floorings reinforcing bar 4 and bridge deck concrete 2 using UHPC precast beams as operation platform, after pour the loads of RC floorings 2 by
UHPC precast beams 1 undertake, and RC floorings 2 also serve as screed-coat.After RC floorings 2 maintenance reach design strength after, RC floorings 2 with
UHPC precast beams 1 form the composite structure section of common stress, bridge floor of then constructing by shear connector 3 and interfacial adhesion
Mat formation wearing course and affiliated facility, bridge construction finishes.Wherein RC floorings 2 as composite structure section compression flange with
UHPC precast beams 1 bear bridge deck and affiliated facility load and operation live load jointly, meanwhile, RC floorings 2 are in lateral multi-disc
When UHPC precast beams 1 are arranged, lateral connection and the load distributional effects of multi-disc UHPC precast beams 1 are played.1 cross-bridges of UHPC precast beams
When being arranged to multi-disc, the transverse connection structure 5 between setting precast beam is needed to decide whether according to stress, further to improve multi-disc
Bearing distribution between UHPC precast beams 1.
Since UHPC precast beams 1 are only subjected to dead weight and RC floorings concrete 2 before forming composite structure with RC floorings concrete 2
Weight in wet base, and formed composite structure after operation mobile load local pressure and compound section entirety stress in top flange be pressurized mainly by RC
Floorings concrete 2 is born, therefore precast beam top flange plate thickness can be thinned when 1 section of UHPC precast beams is designed（Most thin thickness can subtract
To 5cm）, to mitigate the lifting weight and UHPC dosages of UHPC precast beams 1, and then the economy of lift structure scheme.
Claims (9)
1. a kind of ultra-high performance concrete and regular reinforcement concrete combination beam, including UHPC precast beams, which is characterized in that the UHPC
Prefabricated back presets shear connector, and reinforced mesh after-pouring ordinary concrete is arranged in the UHPC precast beams apical margin, is poured after formation
Ordinary reinforced concrete floorings.
2. ultra-high performance concrete according to claim 1 and regular reinforcement concrete combination beam, it is characterised in that the UHPC
Precast beam is made by room temperature maintaining ultra-high performance concrete or steam curing type ultra-high performance concrete.
3. ultra-high performance concrete according to claim 1 and regular reinforcement concrete combination beam, it is characterised in that the UHPC
Precast beam form of fracture includes π shapes, T shapes or box-shaped.
4. ultra-high performance concrete according to claim 1 and regular reinforcement concrete combination beam, it is characterised in that the UHPC
Prefabricated bar body is the structural elements for configuring regular reinforcement.
5. ultra-high performance concrete according to claim 1 and regular reinforcement concrete combination beam, it is characterised in that the UHPC
Prefabricated bar body is the structural elements for configuring deformed bar.
6. ultra-high performance concrete according to claim 1 and regular reinforcement concrete combination beam, it is characterised in that the UHPC
Precast beam is that monolithic or multi-disc are arranged in direction across bridge.
7. ultra-high performance concrete according to claim 6 and regular reinforcement concrete combination beam, it is characterised in that the UHPC
Lateral connection component is arranged in span centre and beam-ends when direction across bridge multi-disc is arranged in precast beam.
8. ultra-high performance concrete according to claim 7 and regular reinforcement concrete combination beam, it is characterised in that the cross-bridges
The lateral connection component being arranged to multi-disc arrangement UHPC precast beams in span centre or beam-ends includes UHPC diaphragm plates, regular reinforcement concrete cross
Partition board, steel construction steel flanged beam, open web type diaphragm plate, steel pipe be horizontally-supported or horizontal prestressed draw-bar.
9. ultra-high performance concrete according to claim 1 and regular reinforcement concrete combination beam, it is characterised in that the UHPC
Precast beam includes rebar connector or structural steel connecting member in the preset shear connector of back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721846306.4U CN207958968U (en) | 2017-12-26 | 2017-12-26 | A kind of ultra-high performance concrete and regular reinforcement concrete combination beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721846306.4U CN207958968U (en) | 2017-12-26 | 2017-12-26 | A kind of ultra-high performance concrete and regular reinforcement concrete combination beam |
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| CN207958968U true CN207958968U (en) | 2018-10-12 |
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| CN201721846306.4U Active CN207958968U (en) | 2017-12-26 | 2017-12-26 | A kind of ultra-high performance concrete and regular reinforcement concrete combination beam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761185A (en) * | 2019-10-16 | 2020-02-07 | 广州地铁设计研究院股份有限公司 | Prestress assembly type track beam for station and construction method thereof |
| CN112031027A (en) * | 2020-09-30 | 2020-12-04 | 福州大学 | UHPC-RC combined overlapped assembly type comprehensive pipe gallery structure and construction method thereof |
-
2017
- 2017-12-26 CN CN201721846306.4U patent/CN207958968U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761185A (en) * | 2019-10-16 | 2020-02-07 | 广州地铁设计研究院股份有限公司 | Prestress assembly type track beam for station and construction method thereof |
| CN112031027A (en) * | 2020-09-30 | 2020-12-04 | 福州大学 | UHPC-RC combined overlapped assembly type comprehensive pipe gallery structure and construction method thereof |
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