CN108798054A - A kind of reinforcement means for the enhancing damaged frame column that ECC is combined with reinforced mesh - Google Patents
A kind of reinforcement means for the enhancing damaged frame column that ECC is combined with reinforced mesh Download PDFInfo
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- CN108798054A CN108798054A CN201810544074.XA CN201810544074A CN108798054A CN 108798054 A CN108798054 A CN 108798054A CN 201810544074 A CN201810544074 A CN 201810544074A CN 108798054 A CN108798054 A CN 108798054A
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- frame column
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- 230000002787 reinforcement Effects 0.000 title claims abstract description 23
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 8
- 210000003205 muscle Anatomy 0.000 claims description 21
- 239000004568 cement Substances 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000004567 concrete Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 9
- 239000010883 coal ash Substances 0.000 claims description 8
- 239000010881 fly ash Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 230000008961 swelling Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000007580 dry-mixing Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 229910002114 biscuit porcelain Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 235000011837 pasties Nutrition 0.000 claims description 2
- 239000008399 tap water Substances 0.000 claims description 2
- 235000020679 tap water Nutrition 0.000 claims description 2
- 238000009966 trimming Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000012946 outsourcing Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 238000009432 framing Methods 0.000 abstract 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract 1
- 230000002250 progressing effect Effects 0.000 abstract 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 description 8
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000011182 bendable concrete Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001965 increasing effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of reinforcement means of ECC enhancing damaged frame columns being combined with reinforced mesh, belong to damaged frame column field of reinforcement in civil engineering.The present invention uses reinforced mesh outsourcing frame column, can not only improve the vertical bearing capacity of frame column, the crack progressing of acceptable framing mask trestle well.The ECC that the present invention uses is a kind of random short-fibre enhancing cement-base composite material with superpower toughness, has significant effect in terms of the ductility, energy dissipation capacity, corrosion resistance, impact resistance and the wearability that improve structure.
Description
Technical field
The present invention relates to a kind of ECC（High tenacity cement-base composite material, Engineered Cementitious
Composite, abbreviation ECC）With the reinforcement means for the enhancing damaged frame column that reinforced mesh is combined, belongs in civil engineering and shake
Damage Frame column reinforcement field.
Background technology
Column is that the most important load-carrying member of frame structure also results in structural collapse even if there is individual columns to fail.One
Aspect, frame column are biasing members, and section deformation bearing capacity can not show a candle to by the beam based on curved effect.Frame column is set to have
There is preferable shock resistance, should ensure that frame column has enough bearing capacities and necessary deformability.Currently, to frame column
Reinforcing mainly has encased steel plate method, carbon cloth reinforced method, prestress steel strand reinforced method etc..Encased steel plate method mainly passes through steel
The components such as plate hoop, high-strength bolt, formed outsourcing one encased steel plate banding it is tight round frame column, to the cross of reinforcing frame trestle
To constraint；CFRP Sheet Strengthening Method is that carbon cloth is attached on frame column, to increase lateral confinement to frame column；Prestress steel
Twisted wire method is using accessories such as galvanized strand wires, bolts.Frame shaft steel strand wires round, using stretching method to round steel twist
Line tensioning, later the surface smear polymer mortar of steel strand wires again.
Invention content
For currently to the limited of the reinforcement technique of frame column, set forth herein the increasings that a kind of ECC is combined with reinforced mesh
The reinforcement means of strong frame column.
The technical solution adopted by the present invention is：A kind of reinforcement means for the enhancing frame column that ECC is combined with reinforced mesh,
Include the following steps：
Damaged frame column 1 is surface-treated, the concrete layer loosened is cut, after exposing coarse aggregate again
Secondary carry out removing surface；
The surrounding of frame column 1 after treatment installs reinforced mesh 5, and the protective cover that reinforced mesh 5 forms is fitted in frame column
1 surface, wherein reinforced mesh 5 are vertically overlapped by vertical muscle and transverse bar, indulge the diameter of muscle and transverse bar no more than in frame column 1
The diameter of stirrup；
In the external coating interfacial agents of reinforced mesh 5, then smears ECC and form reinforcing layer；
Moisture-keeping maintaining is carried out to ECC reinforcing layers 3.
Preferably, the mounting means of reinforced mesh 5 is：Vertical muscle is placed in internal layer, and transverse bar is placed in outer layer, and vertical muscle is abutted against place
The surface of frame column 1 after reason, and connected vertical muscle using transverse bar, it is overlapped between the transverse bar of two adjacent surfaces, lap joint
Column Angle Position is avoided in position, and adjacent lap joint is bounded on each side on face and offsets one from another；The infall and and transverse bar of vertical muscle and transverse bar
Lap-joint use resistance electric welding connection.
Preferably, interfacial agents are cement and expanded slurry interfacial agents, and interfacial agents match ratio is cement：Second class powered coal ash：UEA expands
Agent：Water=1:0.1:0.1:0.4, cement and second class powered coal ash are first carried out dry mixing formation dry powder when preparation, and be uniformly mixed；It
UEA swelling agents and water are uniformly mixed afterwards and form intermixture；Finally intermixture is added in dry powder, and is stirred to thick
State.
Preferably, smear ECC to smear using artificial, point two layers of progress is firmly rubbed when first layer is smeared, it is ensured that mortar with
The closely knit combination of interface and bar-mat reinforcement avoids enclosed gap, and first layer thickness control is in 10mm；First layer is tight after the completion of smearing
Then the second layer is smeared, second layer thickness control is in 20mm.Wherein ECC is by cement, flyash, sand, polyvinyl alcohol
（PVA）The polymer material that the components such as fiber, water and additive mix, the selection for ECC match ratios and preparation reference
Patent of invention " a kind of high tenacity cement-base composite material "（Patent No. CN107382183）In scheme carry out.Concrete component is
Cement, flyash, sand, water, water-reducing agent and PVA fibers, wherein count in mass ratio, cement：Flyash：Sand：Water：Water-reducing agent=1：
（1.0~1.2）：（0.6~0.8）：（0.42~0.57）：（0.001~0.003）；It is equal with the mixing of cement, flyash, sand and water-reducing agent
Total volume after even is radix, and the volume of PVA fibers is 13 ~ 20kg/m3。7、
Preferably, stepIn moisture-keeping maintaining is taken 28 days to ECC reinforcing layers.
The operation principle of the present invention：Reinforced mesh provides lateral confinement for frame column, therefore the lateral of confined concrete becomes
Shape improves the compression strength and deformability of concrete, and to provide lateral-supporting to reinforcing bar, prevents vertical muscle lateral deflection.ECC is not
Only the high-tensile with high tenacity sum, also preferable density fill up the reinforcing layer of frame column using ECC, can be very
Good meets reinforcement criteria.
Beneficial effects of the present invention：Method reinforced concrete frame column using the present invention, can improve frame column well
Vertical bearing capacity, can also improve the deformability for improving frame column well, the cracking resistance, anti-of frame column can also be improved
Erosiveness.
Description of the drawings
Fig. 1 is the main schematic diagram of Frame column reinforcement of the present invention；
Fig. 2 is the reinforced mesh schematic diagram of Frame column reinforcement of the present invention；
Fig. 3 is the diagrammatic cross-section after Frame column reinforcement of the present invention.
In figure：1-frame column, 2- reinforced mesh, 3-ECC reinforcing layers.
Specific implementation mode
The present invention is described in further details with reference to the accompanying drawings and detailed description, but invention be not limited to
Lower embodiment.
Embodiment 1：As shown in Figs. 1-3, a kind of reinforcement means for the enhancing frame column that ECC is combined with reinforced mesh, packet
Include following steps：
Dabbing processing is carried out to the concrete layer that 1 outer layer of frame column is damaged or loosens, chisel goes the pine of concrete surface
Dynamic layer rinses interface, side trimming wire brushing is loosened to the shaft surface of dabbing until exposing coarse aggregate using tap water
Bisque；
The surrounding of frame column 1 after treatment installs reinforced mesh 2, and the protective cover that reinforced mesh 2 forms is fitted in frame column
1 surface, wherein reinforced mesh 2 are vertically overlapped by vertical muscle and transverse bar, indulge the diameter of muscle and transverse bar no more than in frame column 1
The diameter of stirrup；
In the external coating interfacial agents of reinforced mesh 2, the brushing exerted oneself with hairbrush ensures boundary on the interface cleared up
Face agent brushing is uniform, then smears ECC and form reinforcing layer；
Moisture-keeping maintaining is carried out to ECC reinforcing layers 3.
Wherein ECC is by cement, flyash, sand, polyvinyl alcohol（PVA）The components such as fiber, water and additive mix
Polymer material, selection for ECC match ratios and prepare with reference to patent of invention " a kind of high tenacity cement-base composite material "
（Patent No. CN107382183）In scheme carry out.
Embodiment 2：As shown in Fig. 2, the mounting means of reinforced mesh 2 is：Vertical muscle is placed in internal layer, and transverse bar is placed in outer layer, will
The surface of vertical muscle abuts against that treated frame column 1, and connected vertical muscle using transverse bar, it is taken between the transverse bar of two adjacent surfaces
It connects, column Angle Position is avoided in the position of lap joint, and adjacent lap joint is bounded on each side on face and offsets one from another；The infall of vertical muscle and transverse bar
And and transverse bar lap-joint use resistance electric welding connection.
Smear ECC to smear using artificial, point two layers of progress is firmly rubbed when first layer is smeared, it is ensured that mortar and interface and
The closely knit combination of bar-mat reinforcement avoids enclosed gap, and first layer thickness control is in 10mm；And then first layer applies after the completion of smearing
The second layer is smeared, second layer thickness control is in 20mm.Wherein ECC is by cement, flyash, sand, polyvinyl alcohol（PVA）Fiber,
The polymer material that the components such as water and additive mix.
Embodiment 3：The diameter that muscle is indulged in the present embodiment takes the 1/30 of the 1 smaller length of side of frame column, the grid ruler of reinforced mesh
Very little 1/20 value according to the 1 smaller length of side of frame column, this is 15mm × 15mm binding positioning, transverse bar according to size of mesh opening
The lap of splice be 20mm.
Wherein interfacial agents are cement and expanded slurry interfacial agents, and interfacial agents match ratio is cement：Second class powered coal ash：UEA swelling agents：
Water=1:0.1:0.1:0.4, cement and second class powered coal ash are first carried out dry mixing formation dry powder when preparation, and be uniformly mixed；Later will
UEA swelling agents and water, which are uniformly mixed, forms intermixture；Finally intermixture is added in dry powder, and is stirred to viscous pasty state.
The ECC of filling is according to " a kind of high tenacity cement-base composite material "（Patent No. CN107382183）Implement in invention
The match ratio and preparation method of example 1 carried out, to 3 moisture-keeping maintaining of ECC reinforcing layers 28 days.
The vertical bearing capacity, strength degradation, breakoff phenomenon of reinforcing frame trestle are probed into this experiment.Experiment hair
It is existing, it is used with the effect ratio for the reinforcing damaged frame column that high-strength steel mesh sheet is combined using ECC fillings and increases cross-section of frame column ruler
Very little consolidation effect wants excellent, wherein bearing power increase 25% or so, and strength degradation degree reduces.Especially when the bearing capacity of component
When higher, ECC filled layers only have crack expansion, are peeled off almost without ECC Block, and use and tried using the reinforcing of Enlargement of Section
Part but has apparent polymer to peel off.To sum up, adding with the enhancing damaged frame column that high-strength steel mesh sheet is combined, is filled using ECC
Solid method can obtain relatively good effect.
The specific implementation mode of the present invention is explained in detail above in conjunction with attached drawing, but the present invention is not limited thereto,
Within the knowledge of a person skilled in the art, it can also make without departing from the purpose of the present invention each
Kind variation.
Claims (7)
1. a kind of reinforcement means for the enhancing frame column that ECC is combined with reinforced mesh, which is characterized in that include the following steps：
To damaged frame column（1）It is surface-treated, cuts the concrete layer loosened, after exposing coarse aggregate again
Secondary carry out removing surface；
Frame column after treatment（1）Surrounding install reinforced mesh（2）, reinforced mesh（2）The protective cover of composition is fitted in
Frame column（1）Surface, wherein reinforced mesh（2）It is vertically overlapped by vertical muscle and transverse bar, the diameter for indulging muscle and transverse bar is little
In frame column（1）The diameter of interior stirrup；
In reinforced mesh（2）External coating interfacial agents, then smear ECC formed reinforcing layer；
To ECC reinforcing layers（3）Carry out moisture-keeping maintaining.
2. the reinforcement means for the enhancing frame column that ECC according to claim 1 is combined with reinforced mesh, feature exist
In the stepDetailed process be：To frame column（1）Outer layer breakage or the concrete layer loosened carry out at dabbing
Reason, chisel remove the loosening layer of concrete surface, and until exposing coarse aggregate, interface is rinsed using tap water to the shaft surface of dabbing,
The bisque that side trimming wire brushing loosens.
3. the reinforcement means for the enhancing frame column that ECC according to claim 1 is combined with reinforced mesh, feature exist
In the reinforced mesh（2）Mounting means be：Vertical muscle is placed in internal layer, and transverse bar is placed in outer layer, and vertical muscle abuts against to treated
Frame column（1）Surface, and vertical muscle is connected using transverse bar, is overlapped between the transverse bar of two adjacent surfaces, the position of lap joint
Column Angle Position is avoided, adjacent lap joint is bounded on each side on face and offsets one from another；The infall of vertical muscle and transverse bar and and transverse bar take
It meets place and uses resistance electric welding connection.
4. the reinforcement means for the enhancing frame column that ECC according to claim 1 is combined with reinforced mesh, feature exist
In the interfacial agents are cement and expanded slurry interfacial agents, and interfacial agents match ratio is cement：Second class powered coal ash：UEA swelling agents：Water=1:
0.1:0.1:0.4, cement and second class powered coal ash are first carried out dry mixing formation dry powder when preparation, and be uniformly mixed；It is later that UEA is swollen
Swollen dose and water are uniformly mixed and form intermixture；Finally intermixture is added in dry powder, and is stirred to viscous pasty state.
5. the reinforcement means for the enhancing frame column that ECC according to claim 1 is combined with reinforced mesh, feature exist
In the smearing ECC is smeared using artificial, and point two layers of progress is firmly rubbed, it is ensured that mortar and interface and steel when first layer is smeared
The closely knit combination of muscle net avoids enclosed gap, and first layer thickness control is in 10mm；And then first layer is smeared after the completion of smearing
The second layer, second layer thickness control is in 20mm.
6. the reinforcement means for the enhancing frame column that ECC is combined with reinforced mesh according to claim 1 or 5, feature
It is, the group of the ECC is divided into cement, flyash, sand, water, water-reducing agent and PVA fibers, wherein counts in mass ratio, cement：Powder
Coal ash：Sand：Water：Water-reducing agent=1：（1.0~1.2）：（0.6~0.8）：（0.42~0.57）：（0.001~0.003）；With cement, fine coal
Ash, the total volume of sand and water-reducing agent after mixing are radix, and the volume of PVA fibers is 13 ~ 20kg/m3。
7. the reinforcement means for the enhancing frame column that ECC according to claim 1 is combined with reinforced mesh, feature exist
In the stepIn moisture-keeping maintaining is taken 28 days to ECC reinforcing layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810544074.XA CN108798054A (en) | 2018-05-31 | 2018-05-31 | A kind of reinforcement means for the enhancing damaged frame column that ECC is combined with reinforced mesh |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810544074.XA CN108798054A (en) | 2018-05-31 | 2018-05-31 | A kind of reinforcement means for the enhancing damaged frame column that ECC is combined with reinforced mesh |
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| Publication Number | Publication Date |
|---|---|
| CN108798054A true CN108798054A (en) | 2018-11-13 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810544074.XA Pending CN108798054A (en) | 2018-05-31 | 2018-05-31 | A kind of reinforcement means for the enhancing damaged frame column that ECC is combined with reinforced mesh |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06322999A (en) * | 1993-05-14 | 1994-11-22 | Tonen Corp | Concrete column |
| JPH09158493A (en) * | 1995-12-11 | 1997-06-17 | Nippon Riwaaku:Kk | Earthquake resistance reinforcing method for existing reinforced concrete column |
| CN103590616A (en) * | 2013-11-08 | 2014-02-19 | 湖南大兴加固改造工程有限公司 | Reactive powder fiber concrete reinforced concrete column and reinforcement method |
| CN104727567A (en) * | 2015-02-10 | 2015-06-24 | 中国矿业大学 | TRC square column reinforcing method for improving fiber woven grid and fine concrete adhesive property |
| CN104775627A (en) * | 2015-02-11 | 2015-07-15 | 石家庄经济学院 | Steel plate net cage reinforced concrete column structure and preparation method |
| CN107304634A (en) * | 2016-04-19 | 2017-10-31 | 郑州大学 | A kind of high strength stainless steel silk screen strengthens ECC reinforced concrete structures |
| CN107382183A (en) * | 2017-06-29 | 2017-11-24 | 昆明理工大学 | A kind of high tenacity cement-base composite material |
-
2018
- 2018-05-31 CN CN201810544074.XA patent/CN108798054A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06322999A (en) * | 1993-05-14 | 1994-11-22 | Tonen Corp | Concrete column |
| JPH09158493A (en) * | 1995-12-11 | 1997-06-17 | Nippon Riwaaku:Kk | Earthquake resistance reinforcing method for existing reinforced concrete column |
| CN103590616A (en) * | 2013-11-08 | 2014-02-19 | 湖南大兴加固改造工程有限公司 | Reactive powder fiber concrete reinforced concrete column and reinforcement method |
| CN104727567A (en) * | 2015-02-10 | 2015-06-24 | 中国矿业大学 | TRC square column reinforcing method for improving fiber woven grid and fine concrete adhesive property |
| CN104775627A (en) * | 2015-02-11 | 2015-07-15 | 石家庄经济学院 | Steel plate net cage reinforced concrete column structure and preparation method |
| CN107304634A (en) * | 2016-04-19 | 2017-10-31 | 郑州大学 | A kind of high strength stainless steel silk screen strengthens ECC reinforced concrete structures |
| CN107382183A (en) * | 2017-06-29 | 2017-11-24 | 昆明理工大学 | A kind of high tenacity cement-base composite material |
Non-Patent Citations (1)
| Title |
|---|
| 夏寿荣: "《最新混凝土外加剂生产配方精选400例》", 31 January 2014, 中国建材工业出版社 * |
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Application publication date: 20181113 |