CN206128673U - High ductility fibre concrete strengthening roof beam - Google Patents
High ductility fibre concrete strengthening roof beam Download PDFInfo
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- CN206128673U CN206128673U CN201621044183.8U CN201621044183U CN206128673U CN 206128673 U CN206128673 U CN 206128673U CN 201621044183 U CN201621044183 U CN 201621044183U CN 206128673 U CN206128673 U CN 206128673U
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Abstract
The utility model discloses a high ductility fibre concrete strengthening roof beam, including concrete beam, bury first atress reinforcing bar layer underground in concrete beam's bottom surface, the concrete layer outside the first atress reinforcing bar layer is high ductility fibre concrete layer. In order to solve the poor problem of current reinforcing construction process operability. At first removing cover to reinforcement chisel at the bottom of the former concrete beam, making the atress reinforcing bar expose, the newly -increased muscle of being advocated welds with short muscle with the former muscle of being advocated, then builds high ductility fibre concrete on the surface. The utility model discloses utilizing the mechanical properties of high ductility fibre concrete, consolidating the load -carrying properties that good common working property of the newly -increased structure in back and primary structure and wholeness can increase substantially former concrete beam, consolidate simple process, the construction is convenient and it is less to increase the cross -section, structure safety and suitability are better.
Description
Technical field
The utility model belongs to the reinforced construction method of beams of concrete, and in particular to a kind of high elongation fiber concrete is reinforced
Beam.
Background technology
Reinforced beam is one of industry and the important component in civil building, and application is widely.In beam
During military service use, due to inadequate natural endowment of constructing, the durability such as use condition change and concrete material deterioration, steel bar corrosion
The reasons such as damage cause reinforced beam load-carrying properties to be degenerated, and Lack of support phenomenon occur, to guarantee that structure is safe, normal
Use, reinforcement and strengthening need to be carried out to it.Traditional beams of concrete increasing section method for strengthening, is using the reinforced concrete of same material
The former beams of concrete bearing cross-section product of soil increase, to reach the purpose for improving structural bearing capacity.Existing reinforcement technique has the disadvantage scene
Work operations amount is big, and from great, curing period is long, and production and life are had a certain impact, and section increase to constructional appearance and
House headroom also has a certain impact.
There is during service performance degradation, failure so that exit military service in xoncrete structure, mostly with the fragility of material and
Cracking is relevant, and conventional cement based composites tensile strength is low, cracking resistance is poor, fragility is big, when temperature deformation and contraction distortion
When suffering restraints, it is easy to cause the cracking of material.The presence in crack not only reduces the bearing capacity of material, makes material low
Destroy in the presence of ultimate load, and for hazardous medium such as water, Cl-、CO2Deng the passage there is provided erosion, so that
The durability of structure is greatly lowered.Fiber concrete will synthesize chemical fibre and traditional concrete combines, and is concrete
One key areas of study on the modification, and high elongation fiber concrete material is used as a kind of advanced composite material (ACM), it is strong with its tension
The advantages of degree height, light weight, good rotproofness, easy construction, favored by vast engineering circles personage.
The content of the invention
For the defect and deficiency of existing concrete precast floor slab reinforcement means, the utility model is based on fibrous material microcosmic
Mechanical property method for designing, it is considered to fiber properties, matrix characteristics and fiber and basal body interface characteristic and its between interaction
Affect, the high ductility cement-base composite material obtained after to material mix proportion design optimization, using high ductility fiber coagulation
Soil mechanics performance, proposes a kind of a kind of high elongation fiber concrete reinforcement safe efficient, of good performance.
In order to realize above-mentioned task, the concrete technical scheme that the utility model is adopted is as follows：
A kind of high elongation fiber concrete reinforcement, including beams of concrete, bury first and receive in the bottom surface of beams of concrete
Power steel bar layer, the concrete layer outside the first steel bar stress layer is high elongation fiber concrete layer.
Further, the second steel bar stress layer, the first steel bar stress layer and second are also buried under the first steel bar stress layer
Steel bar stress layer is embedded in high elongation fiber concrete layer.
Further, also interval arranges the short muscle of welding, weldering between the first steel bar stress layer and the second steel bar stress layer
Connect short muscle for reinforce the first steel bar stress layer and the second steel bar stress layer.
Specifically, the described short muscle of welding is the short muscle of grade III steel of a diameter of 20mm, welds the long 100mm of short muscle, adjacent weldering
It is 200～400mm to connect the spacing between short muscle.
More specifically, the bottom hole in beams of concrete is implanted into the second steel bar stress layer；On second steel bar stress layer side by side
Multiple second steel bar stresses are set, and the second steel bar stress is the grade III steel of a diameter of 25mm；The aperture of drilling be 28mm, hole depth >=
15d。
Further, multiple first steel bar stresses, the first steel bar stress diameter are set up in parallel on the first described steel bar stress layer
For the three-level reinforcing bar of 25mm.
In addition, the thickness of high elongation fiber concrete layer is 20～25mm.
Advantage of the present utility model is：
(1) using high elongation fiber concrete and newly-increased vertical muscle and former bar connecting synergy reinforcement means, reinforcement
Ultimate bearing capacity is significantly improved, and its deformation ductility is increased considerably, and good with the adhesive property of original structure, is remarkably improved
The globality and anti-seismic performance of structure；
(2) construction method process is simple of the present utility model, easy to operate, is had good using high ductility cement-base composite material
Good durability, can extend service structure service life, reduces cost, and increase section is less after being reinforced using the method, uses
Property is preferable.
Description of the drawings
Fig. 1 is the structural representation of high elongation fiber concrete reinforcement in embodiment 1；
Fig. 2 is sectional views of the Fig. 1 along A-A；
Fig. 3 is sectional views of the Fig. 1 along B-B；
Each label is expressed as in figure：It is fine that the steel bar stresses of 1- first, 2- weld the high ductility of short muscle, the steel bar stresses of 3- second, 4-
Dimension concrete layer, 5- beams of concretes, 6- concrete columns, 7- stirrups；
The utility model is illustrated below in conjunction with specification drawings and specific embodiments.
Specific embodiment
High elongation fiber concrete reinforcement of the present utility model, including beams of concrete 5, in the bottom surface of beams of concrete 5
Embedded first steel bar stress layer, the concrete layer outside the first steel bar stress layer is high elongation fiber concrete layer 4.High ductility fiber
Concrete crushing strength can reach more than 60MPa, and ultimate tensile strength can reach more than 100 times of normal concrete, with similar
The plastic deformation ability of steel, is a kind of ecotecture material with high intensity, high ductility, high-durability and high damnification resistant ability
Material, improves the bearing capacity and ductility of structure, using the synergy between high elongation fiber concrete and steel bar stress, improves beam
The bearing capacity and ductility of body itself；
In order to further increase intensity, the second steel bar stress layer, the first stress steel are also buried under the first steel bar stress layer
Muscle layer and the second steel bar stress layer are embedded in high elongation fiber concrete layer 4.In the friendship of beams of concrete 5 and concrete column 6
The second steel bar stress layer of drilling implantation at boundary；Multiple second steel bar stresses 3, the second stress are set up in parallel on second steel bar stress layer
Reinforcing bar 3 is the grade III steel of a diameter of 25mm；The aperture of drilling be 28mm, hole depth >=15d.Not only increase the intensity of beam body itself
And bearing capacity, while also enhancing the attachment force between beams of concrete and concrete column, enhance the fastness between Liang Yuzhu.
Meanwhile, also interval arranges the short muscle 2 of welding between the first steel bar stress layer and the second steel bar stress layer, welds short muscle
2 are used to reinforce the first steel bar stress layer and the second steel bar stress layer.Using high elongation fiber concrete and newly-increased vertical muscle and raw steel
Muscle connection synergy reinforcement means, reinforcement ultimate bearing capacity is significantly improved, and its deformation ductility is increased considerably, and and former
The adhesive property of structure is good, is remarkably improved the globality and anti-seismic performance of structure；The addition for welding short muscle 2 further increases
Stress between strong two steel bar layers, and step setting not only material-saving, while the dispersiveness for passing through stress, will hold
Carry power to be uniformly distributed, make the first steel bar stress layer, weld between short muscle and the second steel bar stress layer and high elongation fiber concrete
Synergy preferably expressed.
Preferably, welding short muscle 2 can adopt the short muscle of grade III steel of a diameter of 20mm, weld the long 100mm of short muscle 2, adjacent weldering
It is 200～400mm to connect the spacing between short muscle 2.Further, multiple first steel bar stresses 1 are set up in parallel on the first steel bar stress layer,
The three-level reinforcing bar of a diameter of 25mm of the first steel bar stress 1.In addition, the thickness of high elongation fiber concrete layer 4 is 20～25mm.
Embodiment 1：
With reference to Fig. 1-3, the sectional dimension for treating reinforced concrete beam 5 of the present embodiment is 500 × 900mm, and beam span is
5 first steel bar stresses 1, the grade III steel of a diameter of 25mm are arranged in 8.1m, beam bottom；First steel bar stress 1 of beam bottom and beam
The reinforcing bar that top is arranged is carried out strapped by stirrup 7；
During construction：The rendering layer on the surface of beams of concrete 5 is cut first to concrete, makes the stress of beam bottommost first
Expose at least half in the section of reinforcing bar 1；Concrete defect position (loose concrete, breakage) should be cleared up to solid base；
Secondly, in beams of concrete 5 and the junction of concrete column 6 drilling the second steel bar stress 3 of implantation, the stress of beam bottom second
Reinforcing bar 3 is the grade III steel of a diameter of 25mm, positioning drilling, aperture 28mm, hole depth >=15d, with hair-dryer and brush cleaning duct
Till hole inwall is without floating dust；
3rd, bar planting is adopted using modified epoxide resin adhesive or the A level anchoring adhesives of modified vinyl vinegar class adhesive
Irrigator injecting glue；The second steel bar stress 3 handled well is rotated in slow insertion duct, is made anchoring adhesive be evenly affixed to second and is received
In the surface of power reinforcing bar 3 and thread gaps；The second steel bar stress 3 being plugged can not be disturbed again, after anchoring adhesive curing period terminates, with directly
Short reinforcement of weld the second steel bar stress 3 of muscle 2 and the first steel bar stress 1 are welded in footpath for the grade III steel of 20mm, weld short muscle 2 and grow
100mm, spacing is 200～400mm, and wherein steel bar meter and colligation etc. should meet《Concrete structure engineering construction quality accident
Specification》The requirement of GB50204-2015.
Finally, pour interface to new-old concrete to process, dabbing, fully wetting, and interface is obtained using Pattex hundred
Agent brushing.Pressure is smeared before high elongation fiber concrete layer 4, should be come and gone along reinforcement surface and be watered moistening, and after beam face is slightly dry again
Carry out pressure to smear, the thickness of high elongation fiber concrete layer 4 is 25mm, subsequently covers beam surface to prevent water with transparent plastic film
Point evaporation, take measures wet curing 5 days, prevents burning sun to be exposed to the sun, and obtains final product reinforcement.
The high elongation fiber concrete that the utility model is used is for application number：201210435078.7, it is entitled " a kind of
The formula of the concrete in high elongation fiber concrete low-rise shear wall ".
Claims (4)
1. a kind of high elongation fiber concrete reinforcement, it is characterised in that including beams of concrete (5), at the bottom of beams of concrete (5)
The first steel bar stress layer is buried in face, the concrete layer outside the first steel bar stress layer is high elongation fiber concrete layer (4)；
The second steel bar stress layer is also buried under the first steel bar stress layer, the first steel bar stress layer and the second steel bar stress layer are buried
It is located in high elongation fiber concrete layer (4)；
Also interval arranges the short muscle (2) of welding between the first steel bar stress layer and the second steel bar stress layer, and welding short muscle (2) is used for
Reinforce the first steel bar stress layer and the second steel bar stress layer；
The short muscle of described welding (2) is the short muscle of grade III steel of a diameter of 20mm, welds the long 100mm of short muscle (2), the short muscle of adjacent solder
(2) spacing between is 200～400mm.
2. high elongation fiber concrete reinforcement as claimed in claim 1, it is characterised in that in the bottom hole of beams of concrete
It is implanted into the second steel bar stress layer；Multiple second steel bar stresses (3), the second steel bar stress are set up in parallel on second steel bar stress layer
(3) be a diameter of 25mm grade III steel；The aperture of drilling be 28mm, hole depth >=15d.
3. high elongation fiber concrete reinforcement as claimed in claim 1, it is characterised in that the first described steel bar stress layer
On be set up in parallel multiple first steel bar stresses (1), the three-level reinforcing bar of a diameter of 25mm of the first steel bar stress (1).
4. high elongation fiber concrete reinforcement as claimed in claim 1, it is characterised in that high elongation fiber concrete layer
(4) thickness is 20～25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621044183.8U CN206128673U (en) | 2016-09-08 | 2016-09-08 | High ductility fibre concrete strengthening roof beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621044183.8U CN206128673U (en) | 2016-09-08 | 2016-09-08 | High ductility fibre concrete strengthening roof beam |
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| Publication Number | Publication Date |
|---|---|
| CN206128673U true CN206128673U (en) | 2017-04-26 |
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ID=58568803
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621044183.8U Active CN206128673U (en) | 2016-09-08 | 2016-09-08 | High ductility fibre concrete strengthening roof beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898204A (en) * | 2021-10-26 | 2022-01-07 | 中建八局天津建设工程有限公司 | Reinforcing structure of frame beam and reinforcing method thereof |
-
2016
- 2016-09-08 CN CN201621044183.8U patent/CN206128673U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898204A (en) * | 2021-10-26 | 2022-01-07 | 中建八局天津建设工程有限公司 | Reinforcing structure of frame beam and reinforcing method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230419 Address after: Room 203, No. 7, Middle Section of Jingcheng Road, Jingwei Industrial Park, Xi'an Economic and Technological Development Zone, Shaanxi Province, 710299 Patentee after: Xi'an Jianda Special Engineering Co.,Ltd. Address before: 710064 No. 126 central section of South Ring Road, Yanta District, Xi'an, Shaanxi Patentee before: CHANG'AN University |