CN105888283A - Method for reinforcing reinforced concrete shear wall structure by using FRP grid strengthened ECC strips - Google Patents
Method for reinforcing reinforced concrete shear wall structure by using FRP grid strengthened ECC strips Download PDFInfo
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- CN105888283A CN105888283A CN201610306266.8A CN201610306266A CN105888283A CN 105888283 A CN105888283 A CN 105888283A CN 201610306266 A CN201610306266 A CN 201610306266A CN 105888283 A CN105888283 A CN 105888283A
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- 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
-
- 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
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention provides a method for reinforcing a reinforced concrete shear wall structure by using FRP grid strengthened ECC strips. The method comprises the following steps: (1) determining FRP grid strengthened ECC network distribution rate, and widths, intervals and included angles of the reinforcing strips, producing FRP grids, and carrying out sand blasting on surfaces of the FRP grids; (2) treating concrete surfaces; (3) mounting the FRP grids, and fixing the FRP grids on raw concrete surfaces by using fixing pieces; (4) applying an interface agent; (5) blending ultra-high-toughness cement composite materials ECC; (6) spraying the blended ultra-high-toughness cement composite materials ECC, casting in place or smearing on places fixedly provided with the FRP grids; and (7) maintaining: maintaining the ECC in a moisturized manner. By the method, problems existing in an existing method for reinforcing a reinforced concrete shear wall are solved, anti-cracking ability, deformation ability, energy dissipation ability, anti-erosion performance, shock resistance and the like of the reinforced concrete shear wall can be improved remarkably, and meanwhile reinforcing economy is considered.
Description
Technical field
The present invention relates to a kind of new material FRP grid and strengthen ECC band reinforced steel concrete (RC) shear wall structure
New technique, belong to technical field of buildings.
Background technology
Engineered Cementitious Composites is called for short ECC, be a kind of have superpower toughness disorderly to point
Cloth short fiber reinforced cement-base composite material.It is different from common fibre reinforced concrete (Fiber Reinforced
Concrete, FRC), ECC is to utilize fracture mechanics, microphysics mechanics and Principle of Statistics, carries out material system systematically
Design, adjust and optimize the Novel engineering cement-base composite material obtained.ECC is typically with cement, mineral admixture, quartz
Sand, as matrix, does reinforcing material with fiber, and in the case of fiber volume volume is less than 2%, its ultimate tensile strength is generally 3%
～in the range of 7%, there is elongation strain hardening capacity and multiple crack growth feature, and the multiple crack growth fracture width of saturation
Less than 0.1mm, energy dissipation capacity is 3 times of conventional fibre concrete.The superhigh tenacity of ECC uniqueness, high cracking resistance energy, thoroughly change
The situation that conventional concrete fragility is big, easy to crack, therefore it is improving the ductility of structure, energy dissipation capacity, corrosion resistance, anti-impact
Hitting property and wearability aspect have significant effect, have in anti-seismic structure, large deformation structure, shock resistance structure and reparation structure
Vast potential for future development.Abroad, by these advantages, ECC has been applied to slope reinforcement, the reinforcing on dam surface, bridge
The fields such as beam connecting plate, seismic Reinforced Concrete Beams.
Fibrage grid (FRP grid) profile has two kinds of forms of two and three dimensions.Fiber knitted net has lightweight, height
By force, the advantage such as bidirectional stress, easy construction, the construction that may be used for adverse circumstances.Abroad, fiber knitted net extensively should
For fields such as Tunnel Engineering, slope reinforcement, runway, strand engineerings.Additionally, due to fiber knitted net is non magnetic material
Material, so being well suited for being applied in the structures higher to environment magnetic requirements such as hospital, laboratory, observation station.At present, reinforcing bar
The reinforcement means of concrete shear force wall mainly has the methods such as steel-bonded reinforcement, Strengthening by Steel-Packing, fibrous material reinforcing.According to existing
Result of study can obtain following conclusions: (1) steel bonding and Strengthening by Steel-Packing: use different steel bondings and Strengthening by Steel-Packing
Mode can improve the horizontal bearing capacity of concrete shear force wall, but is not significantly improved the ductility of concrete shear force wall；
On failure mode, during steel-bonded reinforcement, the anchorage style of body of wall end is to property such as the failure mode of concrete shear force wall and bearing capacities
Index can there is obvious impact, without the anchoring handling body of wall end well, it is difficult to ensure the stress of body of wall end
Can, test specimen is it would appear that body of wall root lifts, and reinforcing bar is broken to wait and destroyed, and destroys serious bottom body of wall, is not reaching to change body of wall
The purpose of failure mode；(2) fiber reinforced: designing not enough shear wall for damaged shear wall and shear resistance, FRP reinforces
Technology be can yet be regarded as one reinforcing mode fast and effectively, but owing to Linear elastic mechanics feature, the dissipation energy of FRP are less,
Easily bonding failure, need the factors such as fabulous anchor measure to have impact on the whole of FRP usefulness to play.
Summary of the invention
It is an object of the invention to for above-mentioned the deficiencies in the prior art, it is provided that a kind of FRP grid strengthens ECC reinforced steel to be mixed
The method of solidifying soil shear wall structure, it is possible to increase reinforced concrete shear wall cracking resistance, deformability, energy dissipation capacity and anti-impact
Hit performance.
The technical scheme is that and be achieved in that: a kind of FRP grid strengthens ECC reinforced steel concrete shear wall knot
The method of structure, is carried out in the following manner:
L () determines that FRP grid strengthens the FRP distribution rate of ECC, reinforces the width of band, spacing and angle, raw according to design size
Produce FRP grid, and FRP surface mesh is carried out blasting treatment；
(2) concrete surface processes, it would be desirable to the concrete structural surface mortar of reinforcing polishes off, and exposes aggregate；
(3) FRP grid is installed, uses fixture that FRP grid is fixed on former concrete surface；
(4) brush interfacial agents；
(5) mix superhigh tenacity cement composite material ECC；
(6) the superhigh tenacity cement composite material ECC mixed is sprayed, cast-in-place or be put on and be fixed with the place of FRP grid；
(7) maintenance, carries out moisture-keeping maintaining to superhigh tenacity cement composite material ECC.
FRP grid is square net or network.
FRP grid is that carbon fiber, glass fibre or aramid fiber impregnated in and form woven mesh in the resin of corrosion resistance
Entirety.
The present invention solves the problem that existing reinforced concrete shear wall reinforcement means exists, and uses the method for the present invention to add
Gu xoncrete structure, it is remarkably improved reinforced concrete shear wall cracking resistance, deformability, energy dissipation capacity, erosion-resisting characteristics
And shock resistance etc..
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the scheme of installation of rectangle PRP grid.
Fig. 2 is the scheme of installation of rhombus FRP grid.
Wherein: 1.FRP grid strengthens ECC band, 2. RC shear wall, 3. rivet.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not paying creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
The method of the present invention is carried out in the following manner:
L (), according to design requirement, determines that FRP grid strengthens the FRP distribution rate of ECC, reinforces the width of band, spacing and angle,
Produce FRP grid according to design size, and FRP surface mesh is carried out blasting treatment；
(2) concrete surface processes, it would be desirable to the concrete structural surface mortar of reinforcing polishes off, and exposes aggregate；
(3) FRP grid is installed, uses the fixtures such as rivet that FRP grid is fixed on former concrete surface, note fixed；
(4) brush interfacial agents；The kind of interfacial agents is more, and its concrete use step may have certain discrepancy, use time
Time to configure in strict accordance with the description of interfacial agents and to use, it is ensured that quality；
(5) mix superhigh tenacity cement composite material ECC, mobility needs to meet construction requirement, and intensity meets design requirement；
(6) the superhigh tenacity cement composite material ECC mixed is sprayed, cast-in-place or be put on and be fixed with the place of FRP grid；Super
High tenacity cement composite material ECC thickness meets design requirement.
(7) maintenance, carries out moisture-keeping maintaining to superhigh tenacity cement composite material ECC.
As illustrated in fig. 1 and 2, FRP grid strengthens ECC band 1 can be Rectangular grid or rhombus net grid-like arrangement.
The FRP net 1 that FRP grid strengthens in ECC band 1 is fixed on RC shear wall 2 by rivet 3.
RC shear wall is general under horizontal loading or geological process produces diagonal crack, generation failure by shear, FRP on body of wall
Grid strengthens ECC and refers to that superhigh tenacity cement composite material ECC includes that FRP grid, FRP grid refer to carbon fiber, glass fibre
Or aramid fiber contour performance continuous fiber impregnated in the resin of corrosion resistance, form the entirety of woven mesh.
FRP grid strengthens ECC and combines the advantage of chopped fiber and fiber knitted net, can be obviously improved the tough of material
Property, improve the Crack Control ability of material so that crack developing obtains the finest and closely woven, and a large amount of microcrack occurs, shows very
High ductility and resistance capacity to deformation, can realize the innoxious dispersion to distress in concrete, obtain higher bearing capacity simultaneously,
Solve the endurance issues that armored concrete produces because of steel bar corrosion.This material is reinforced for reinforced concrete shear wall can
Obtaining more superior consolidation effect, after making reinforcing, structure obtains more preferable cracking resistance, antidetonation, corrosion resistance, has preferably
Durability and fire resistance, the impact on constructional appearance shape is less, and it is simple and quick to construct.It addition, FRP grid strengthens ECC
Band reinforce shear wall body method compared with FRP grid strengthen whole of ECC reinforce shear wall body method more economical, flexible,
It is suitable for.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (3)
1. the method that a FRP grid strengthens ECC reinforced steel concrete shear wall structure, it is characterised in that be according to following side
Formula is carried out:
L () determines that FRP grid strengthens ECC distribution rate, reinforces the width of band, spacing and angle, produce FRP according to design size
Grid, and FRP surface mesh is carried out blasting treatment；
(2) concrete surface processes, it would be desirable to the concrete structural surface mortar of reinforcing polishes off, and exposes aggregate；
(3) FRP grid is installed, uses fixture that FRP grid is fixed on former concrete surface；
(4) brush interfacial agents；
(5) mix superhigh tenacity cement composite material ECC；
(6) the superhigh tenacity cement composite material ECC mixed is sprayed, cast-in-place or be put on and be fixed with the place of FRP grid；
(7) maintenance, carries out moisture-keeping maintaining to superhigh tenacity cement composite material ECC.
FRP grid the most according to claim 1 strengthens the method for ECC reinforced steel concrete shear wall structure, its feature
It is: it is Rectangular grid distribution or network layout that FRP grid strengthens ECC band.
FRP grid the most according to claim 1 strengthens the method for ECC reinforced steel concrete shear wall structure, its feature
It is: FRP grid is that carbon fiber, glass fibre or aramid fiber impregnated in the resin of corrosion resistance and form the whole of woven mesh
Body.
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| CN201610306266.8A CN105888283A (en) | 2016-05-10 | 2016-05-10 | Method for reinforcing reinforced concrete shear wall structure by using FRP grid strengthened ECC strips |
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| CN201610306266.8A CN105888283A (en) | 2016-05-10 | 2016-05-10 | Method for reinforcing reinforced concrete shear wall structure by using FRP grid strengthened ECC strips |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437189A (en) * | 2016-09-12 | 2017-02-22 | 上海市建筑科学研究院 | Method of reinforcing and restoring earthquake-damaged reinforced concrete frame |
| CN107740593A (en) * | 2017-09-06 | 2018-02-27 | 江苏尼高科技有限公司 | Warehouse separated type external wall outer insulation repairing and reinforcing method |
| CN108298904A (en) * | 2018-02-08 | 2018-07-20 | 中国矿业大学 | A kind of reinforcement means for the ECC composite fibre mesh grids improving masonry wall anti-seismic performance |
| CN108457201A (en) * | 2018-02-06 | 2018-08-28 | 山西省交通科学研究院 | Ultra-high performance concrete lattice ruggedized construction and its method for reinforcing masonry arch bridge |
| CN108843042A (en) * | 2018-07-18 | 2018-11-20 | 华侨大学 | A kind of compound constant reinforced concrete column and its reinforcement means |
| CN108868188A (en) * | 2018-08-22 | 2018-11-23 | 天津核海源科技发展有限公司 | A kind of tool to lock in restrictive condition lower steel plate bonding from absorption rest |
| CN108894533A (en) * | 2018-09-07 | 2018-11-27 | 中冶建筑研究总院有限公司 | A kind of wall reinforcement structure and reinforcement means |
| CN109138162A (en) * | 2018-09-07 | 2019-01-04 | 中国人民解放军陆军工程大学 | A kind of prefabricated arches and production method |
| CN109555331A (en) * | 2018-11-26 | 2019-04-02 | 广东工业大学 | A kind of anchor structure and construction method promoting beams of concrete Flexural strength efficiency |
| CN109726449A (en) * | 2018-12-12 | 2019-05-07 | 长安大学 | A kind of lattice point intersection anchoring process suitable for rigid lattice network shape material |
| CN109838015A (en) * | 2019-01-11 | 2019-06-04 | 东南大学 | Configure the high shearing resistance performance concrete shear wall of fiber-reinforced composite material grid ribs |
| CN110173127A (en) * | 2019-06-04 | 2019-08-27 | 无锡市建筑设计研究院有限责任公司 | The ruggedized construction and its construction technology of parts of shear wall structure wall body concrete replacement |
| CN111502326A (en) * | 2020-04-30 | 2020-08-07 | 江苏绿材谷新材料科技发展有限公司 | Rapid prestress FRP grid reinforcing method |
| CN112482813A (en) * | 2020-12-03 | 2021-03-12 | 武汉大学 | FRP/ECC permeable bidirectional reinforced concrete bidirectional slab capable of reinforcing damaged steel bar in two directions and preparation method thereof |
| CN112482816A (en) * | 2020-12-03 | 2021-03-12 | 武汉大学 | FRP/ECC double-faced adhesive type reinforced concrete bidirectional plate for reinforcing damaged steel bar and preparation method thereof |
| CN112554332A (en) * | 2020-12-10 | 2021-03-26 | 上海席得建筑设计有限公司 | Core section of thick bamboo for architectural design |
| CN113700333A (en) * | 2021-09-01 | 2021-11-26 | 中国建筑第七工程局有限公司 | High-density reinforcing method for concrete integral structure |
| CN114704116A (en) * | 2022-04-20 | 2022-07-05 | 上海天补材料科技有限公司 | GRC decorative line repairing and reinforcing method |
| CN114718339A (en) * | 2022-04-26 | 2022-07-08 | 中交上海港湾工程设计研究院有限公司 | Structure for reinforcing beam, plate and column by adopting basalt fiber grid system and construction method |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437189A (en) * | 2016-09-12 | 2017-02-22 | 上海市建筑科学研究院 | Method of reinforcing and restoring earthquake-damaged reinforced concrete frame |
| CN107740593B (en) * | 2017-09-06 | 2020-05-15 | 江苏尼高科技有限公司 | External thermal insulation repair reinforcing method for divided bin type external wall |
| CN107740593A (en) * | 2017-09-06 | 2018-02-27 | 江苏尼高科技有限公司 | Warehouse separated type external wall outer insulation repairing and reinforcing method |
| CN108457201A (en) * | 2018-02-06 | 2018-08-28 | 山西省交通科学研究院 | Ultra-high performance concrete lattice ruggedized construction and its method for reinforcing masonry arch bridge |
| CN108298904A (en) * | 2018-02-08 | 2018-07-20 | 中国矿业大学 | A kind of reinforcement means for the ECC composite fibre mesh grids improving masonry wall anti-seismic performance |
| CN108843042A (en) * | 2018-07-18 | 2018-11-20 | 华侨大学 | A kind of compound constant reinforced concrete column and its reinforcement means |
| CN108868188A (en) * | 2018-08-22 | 2018-11-23 | 天津核海源科技发展有限公司 | A kind of tool to lock in restrictive condition lower steel plate bonding from absorption rest |
| CN108868188B (en) * | 2018-08-22 | 2023-12-12 | 天津核海源科技发展有限公司 | Tool for bonding and self-adsorption supporting locking of steel plate under limiting condition |
| CN108894533A (en) * | 2018-09-07 | 2018-11-27 | 中冶建筑研究总院有限公司 | A kind of wall reinforcement structure and reinforcement means |
| CN109138162A (en) * | 2018-09-07 | 2019-01-04 | 中国人民解放军陆军工程大学 | A kind of prefabricated arches and production method |
| CN109555331A (en) * | 2018-11-26 | 2019-04-02 | 广东工业大学 | A kind of anchor structure and construction method promoting beams of concrete Flexural strength efficiency |
| CN109726449B (en) * | 2018-12-12 | 2022-11-29 | 长安大学 | Lattice point cross anchoring method suitable for rigid grid material |
| CN109726449A (en) * | 2018-12-12 | 2019-05-07 | 长安大学 | A kind of lattice point intersection anchoring process suitable for rigid lattice network shape material |
| CN109838015A (en) * | 2019-01-11 | 2019-06-04 | 东南大学 | Configure the high shearing resistance performance concrete shear wall of fiber-reinforced composite material grid ribs |
| CN109838015B (en) * | 2019-01-11 | 2020-11-20 | 东南大学 | High-shear-resistance concrete shear wall provided with fiber reinforced composite material grid bars |
| CN110173127A (en) * | 2019-06-04 | 2019-08-27 | 无锡市建筑设计研究院有限责任公司 | The ruggedized construction and its construction technology of parts of shear wall structure wall body concrete replacement |
| CN111502326A (en) * | 2020-04-30 | 2020-08-07 | 江苏绿材谷新材料科技发展有限公司 | Rapid prestress FRP grid reinforcing method |
| CN112482813A (en) * | 2020-12-03 | 2021-03-12 | 武汉大学 | FRP/ECC permeable bidirectional reinforced concrete bidirectional slab capable of reinforcing damaged steel bar in two directions and preparation method thereof |
| CN112482816A (en) * | 2020-12-03 | 2021-03-12 | 武汉大学 | FRP/ECC double-faced adhesive type reinforced concrete bidirectional plate for reinforcing damaged steel bar and preparation method thereof |
| CN112554332A (en) * | 2020-12-10 | 2021-03-26 | 上海席得建筑设计有限公司 | Core section of thick bamboo for architectural design |
| CN113700333A (en) * | 2021-09-01 | 2021-11-26 | 中国建筑第七工程局有限公司 | High-density reinforcing method for concrete integral structure |
| CN113700333B (en) * | 2021-09-01 | 2023-11-10 | 中国建筑第七工程局有限公司 | High-density reinforcement method for concrete integral structure |
| CN114704116A (en) * | 2022-04-20 | 2022-07-05 | 上海天补材料科技有限公司 | GRC decorative line repairing and reinforcing method |
| CN114718339A (en) * | 2022-04-26 | 2022-07-08 | 中交上海港湾工程设计研究院有限公司 | Structure for reinforcing beam, plate and column by adopting basalt fiber grid system and construction method |
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Application publication date: 20160824 |