CN106592997B - The carbon cloth reinforced additional cushion block construction method of reinforced concrete square columns - Google Patents
The carbon cloth reinforced additional cushion block construction method of reinforced concrete square columns Download PDFInfo
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- CN106592997B CN106592997B CN201611066674.7A CN201611066674A CN106592997B CN 106592997 B CN106592997 B CN 106592997B CN 201611066674 A CN201611066674 A CN 201611066674A CN 106592997 B CN106592997 B CN 106592997B
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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
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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
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
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- Chemical Kinetics & Catalysis (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a kind of carbon cloth reinforced additional cushion block construction methods of reinforced concrete square columns.The Reactive Powder Concrete cushion block of prefabricated modularization（That is RPC cushion blocks, including arc angle cushion block and rectangle cushion block）；It pastes it into and is reinforced reinforced concrete square columns surface to form arc angle and outsourcing plane；Then again by carbon cloth（That is CFRP）It pastes package and arrives cushion block outer surface.Present inventive concept is novel, and construction procedure is clear, simple, practical.Avoid the process of the manual polishing carried out to the corner of reinforced concrete square columns and surface before reinforcing, to avoid the noise generated in bruting process and dust pollution and the damage to being reinforced caused by column, the construction method of quickly and easily reinforced steel concrete square column can be achieved, while also can guarantee its consolidation effect.And the RPC materials selected, intensity and durability are better than normal concrete, and are widely used to Practical Project, have more ripe preparation process, make the ideal chose of cushion block material.
Description
Technical field
The invention belongs to structural strengthening fields, and in particular to a kind of carbon cloth reinforced additional cushion block of reinforced concrete square columns
Construction method, this method improve carrying by the reinforced concrete square columns outsourcing carbon cloth to needing reinforcement and strengthening, to play
The effect of ability, to reach the requirement for extending service life.It is public that this method is suitable for the large size based on frame structure form
Building（Such as school, market）In to the reinforcement and strengthening and improvement project of reinforced concrete square columns.
Background technology
In recent years, need the building construction of reinforcement and strengthening increased, for reinforced column, traditional reinforcing mode has
The methods of section-increased method, reinforcement by sticking of sheets and carbon fibre reinforced polymer reinforcing, wherein carbon fibre reinforced polymer（CFRP）Method for strengthening again with
Its is easy for construction, does not increase the advantages such as building dead weight is used widely in recent years.But the reinforcement means is to reinforced concrete
Some problems can be encountered in the application process of earthwork column：1, before reinforcing, reinforced concrete square columns are needed its four with sander
Corner carries out chamfering polishing（Corner stress concentration is avoided, consolidation effect is influenced）, and floating paddle to its surface polishing（Expose
Aggregate surface substrate so that bond effect is more preferable）, but this process can expend a large amount of labor hour, and produced in bruting process
Raw noise and dust can all pollute surrounding enviroment.2, after pillar is polished, area of section reduces, element bearing capacity
It reduces, while concrete cover is weakened, it is serious also reinforcing bar to be leaked outside, it is viscous in concrete to influence reinforcing bar
Performance is tied, while can also cause the reduction of structure durability.
The present invention is directed to problem above, is avoided to the corner of reinforced concrete square columns and outer using additional model pad method
The polishing on surface, the Reactive Powder Concrete that cushion block material is high using intensity, durability is good（RPC）, and be prefabricated in advance
And modularization make, reinforce before the surface that area is reinforced in square column is pasted with structure glue.
Invention content
Need when it is an object of the invention to overcome to gluing CFRP reinforced steel concrete square columns to the corner of pillar and
A large amount of labor hour is expended in surface when carrying out chamfering with except paddle polishing, and generates noise and dust pollution simultaneously to being reinforced
Structural elements cause damage the problems such as, a kind of additional cushion block construction method of carbon cloth reinforced reinforced concrete square columns is provided.
The specific steps are：
Step 1, prefabricated modularization RPC cushion blocks, RPC cushion blocks include arc angle cushion block and rectangle cushion block, the arc of arc angle cushion block
It is 90 degree that degree radius, which takes 30mm, corresponding central angle, and the extension length of side that connects with arc angle takes 50mm, and rectangle cushion block is along column section direction
Length uniformly takes 100mm, and the width of RPC cushion blocks takes the width of package CFRP to add 10mm again, and RPC pad thickness is according to being reinforced
Column cross-section size size takes 20 ~ 30mm.
Step 2 determines package regions of the CFRP on being reinforced column, be used in combination the line of ink marker be reinforced column surface pop-up need to carry out
The position range of CFRP packages.
RPC cushion blocks are pasted onto the package region being reinforced on column by step 3, first use epoxy dried hanging hang structure glue by arc angle pad
Block pastes the four corners for being reinforced column package region, then uses ring in four planes between the arc angle cushion block pasted
Oxygen dried hanging hang structure gluing sticks rectangular pad block.
Step 4, after all RPC cushion blocks are all pasted in place, two L-shaped angle steel are covered into straps and are sleeved on RPC cushion block surroundings, and
The screw in angle steel set strap is tightened, RPC cushion blocks is made to be tightened, it is fixed before epoxy dried hanging hang structure glue is uncured to play
The effect of RPC cushion blocks, the epoxy dried hanging hang structure adhesive curing after 3 minutes unscrew the screw in angle steel set strap, unload L-shaped angle steel
Strap is covered, and by the gap filler joint filling of the gap between RPC cushion blocks.
Step 5, RPC cushion blocks surface wrap up CFRP, are first being pasted onto the RPC cushion blocks outer surface one layer of bottom of painting being reinforced on column
Glue is wrapped in the outside for the RPC cushion blocks for being coated with primer after then infiltrating CFRP with epoxy glue, the lap of splice of the ends CFRP is not
Less than 200mm, that is, complete the additional cushion block construction of carbon cloth reinforced reinforced concrete square columns.
The RPC cushion blocks be modulated dimension make, paste it into be reinforced on column when, such as encounter less than 100mm
Gap size when, according to actual conditions to rectangle cushion block carry out cutting mend fill out.
The technology of the present invention compared with prior art, has the following advantages and effect：
1, by reinforced concrete square columns surface mount RPC cushion blocks and forming arc angle, it can avoid manual polishing before reinforcing
This time-consuming and laborious process, while the noise generated in bruting process and dust pollution are avoided, it avoids causing to being reinforced column
Damage, so as to realize the construction method of quickly and easily reinforced steel concrete square column, while ensureing its consolidation effect.
2, the intensity of RPC materials and durability are better than normal concrete, and are widely used to Practical Project, have
More ripe preparation process, so being the ideal chose for making cushion block material.
Description of the drawings
Fig. 1 is that square column reinforces preceding snap the line and needs the schematic diagram of CFRP parcel locations in the embodiment of the present invention.
Fig. 2 is that RPC cushion blocks are pasted onto to the overall schematic behind square column surface in the embodiment of the present invention.
Fig. 3 is that two L-shaped angle steel cover strap schematic diagram in the embodiment of the present invention.
Fig. 4 is that two L-shaped angle steel cover the floor map that strap fixes RPC cushion blocks in the embodiment of the present invention.
Fig. 5 is the floor map for removing L-shaped angle steel in the embodiment of the present invention and covering package CFRP after strap.
Fig. 6 is that CFRP is finally wrapped in RPC cushion block external reinforcements in the embodiment of the present invention to be molded overall schematic.
It is marked in figure：The 1- lines of ink marker；The position range of 2- CFRP packages；3- arc angle cushion blocks；4- rectangle cushion blocks；5-CFRP；6-
L-shaped angle steel covers strap；7- angle steel covers the screw in strap.
Specific implementation mode
Present invention is further described in detail below in conjunction with the accompanying drawings：
Embodiment：
As shown in Fig. 1 ~ 6, the present embodiment is to reinforce object with 300mm length of side reinforced concrete square columns, using viscous CFRP pairs
Square column is reinforced, and construction method includes the following steps：
Step 1, prefabricated modularization RPC cushion blocks.RPC cushion blocks include arc angle cushion block 3 and rectangle cushion block 4, arc angle cushion block 3
It is 90 degree that radius of the radian, which takes 30mm, corresponding central angle, and the extension length of side that connects with arc angle takes 50mm；Rectangle cushion block 4 is along column section
Direction length uniformly takes 100mm, and the width of RPC cushion blocks takes the width of package CFRP5 to add 10mm again, CFRP wide in the present embodiment
150mm, therefore the height of RPC cushion blocks is 160mm, RPC pad thickness takes 20mm.
Step 1 as described above includes the following steps：
Step 1.1, the match ratio of RPC are shown in Table 1.Wherein content of steel fiber be volume ratio, a diameter of 0.20mm, length be 8 ~
10mm；Water-reducing agent is new high performance water-reducing agent, white powder, water-reducing rate 30%；The normal silicate water that cement is 42.5
Mud.
1 RPC match ratios of table
The preparation of step 1.2, RPC.Mixing plant should be forced mixer, and not preferably less than 45 turns of blender rotating speed/
min.It feeds intake, stirring sequence：1, accurate weighing material requested；2, quartz sand and steel fibre, steel fibre is first added gap can be used larger
Sieve sieving, stir 3min；3, cement and silicon ash is added, stirs 2min；4, powdered water-reducing agent is added, stirs 2min；
5, Jia Shui stirs 4min.
The preparation of step 1.3, RPC cushion blocks.The RPC materials being stirred should disposably be packed into cushion block die trial and be higher by die trial
Mouthful, vibration moulding on a vibration table.It should prevent die trial from beating on a vibration table when vibration, spatula is used in combination to add to insert along die trial inner wall
It smashes, until continueing to the surfaces RPC pulp.Troweling press finishing is paid attention in process of vibrating, and prevents bubble from generating.End of vibrating scrapes off more
Remaining mixture smoothes out surface of test piece with spatula, mold is put into fog room.
The maintenance of step 1.4, RPC cushion blocks.Be molded the component that finishes first to be put into 20 ± 2 DEG C of temperature, relative humidity 95% with
On standard curing room in conserve for 24 hours ~ 36h, form removal later.Natural curing is carried out to test specimen, environment when natural curing is average
Temperature is preferably higher than 10 DEG C, and component surface should keep moistening no less than 7 days.
Step 2 determines package regions of the CFRP on being reinforced column, be used in combination the line of ink marker 1 be reinforced the pop-up of column surface need to be into
The position range 2 of row CFRP packages.
Step 3 pastes RPC cushion blocks in the package region for being reinforced column, first uses epoxy dried hanging hang structure glue by arc angle cushion block 3
Paste the four corners for being reinforced column package region；Then ring is used in four planes between the arc angle cushion block 3 pasted
Oxygen dried hanging hang structure gluing sticks rectangular pad block 4.Pillar sectional dimension is 300mm × 300mm in the present embodiment, therefore arc angle cushion block 3
After having pasted, two pieces of rectangle cushion blocks 4 of patch are only needed on remaining each face.
Step 4 is fixed temporarily RPC cushion blocks.After all RPC cushion blocks are all pasted in place, two L-shaped angle steel are covered into strap 6
RPC cushion block surroundings are sleeved on, and tighten the screw 7 in angle steel set strap, RPC cushion blocks is made to be tightened, it is cladding in epoxy to play
The spiral shell in angle steel set strap is unscrewed in the effect of fixed cushion block, the epoxy dried hanging hang structure adhesive curing after 3 minutes before structure glue is uncured
Silk 7 unloads L-shaped angle steel set strap 6, in case of being had the gap between RPC cushion blocks, with gap filler joint filling.
CFRP5 is wrapped up on step 5, RPC cushion blocks surface.First it is being pasted onto one layer of RPC cushion blocks outer surface painting being reinforced on column
Primer, is wrapped in the outside for the RPC cushion blocks for being coated with primer after then infiltrating CFRP5 with epoxy glue, the overlap joint of the ends CFRP5 is grown
Degree is 200mm.The process for preparation of epoxy glue is：Epoxy glue host A and curing agent B are stirred evenly respectively, then press A:B=2:1
Mass ratio pour into container, stir directly do not have aberration.Must not there are water and greasy dirt to be mixed into when stirring.Epoxy glue is matched every time
Glue amount should not be too many, is advisable with 30 minutes glue consumptions of one man operation.At normal temperatures（25 degrees Celsius）Hardening time is 5 hours.
The RPC cushion blocks be modulated dimension make, paste it into be reinforced on column when, such as encounter less than 100mm
Gap size when, according to actual conditions to rectangle cushion block 4 carry out cutting mend fill out.
Specific embodiment described herein is only an illustration of the spirit of the invention.The technical field of the invention
Technical staff can do certain modify or supplement or adopt similar modes to described specific embodiment and substitute, but can't
Deviate the spirit or beyond the scope defined by the appended claims of the present invention.
Claims (1)
1. a kind of additional cushion block construction method of carbon cloth reinforced reinforced concrete square columns, it is characterised in that the specific steps are：
Step 1, prefabricated modularization RPC cushion blocks, RPC cushion blocks include arc angle cushion block and rectangle cushion block, the radian half of arc angle cushion block
It is 90 degree that diameter, which takes 30mm, corresponding central angle, and the extension length of side that connects with arc angle takes 50mm, and rectangle cushion block is along column section direction length
100mm, the width of RPC cushion blocks is uniformly taken to take the width of package CFRP that 10mm, RPC pad thickness is added to be cut according to column is reinforced again
Face size takes 20 ~ 30mm；
Step 2 determines package regions of the CFRP on being reinforced column, be used in combination the line of ink marker be reinforced column surface pop-up need to carry out CFRP
The position range of package；
RPC cushion blocks are pasted onto the package region being reinforced on column by step 3, are first glued arc angle cushion block with epoxy dried hanging hang structure glue
The four corners for being reinforced column package region are attached to, it is then dry with epoxy in four planes between the arc angle cushion block pasted
Hanging hang structure gluing sticks rectangular pad block；
Step 4, after all RPC cushion blocks are all pasted in place, two L-shaped angle steel are covered into straps and are sleeved on RPC cushion block surroundings, and are tightened
Angle steel covers the screw in strap, and RPC cushion blocks is made to be tightened, to play the fixed RPC pads before epoxy dried hanging hang structure glue is uncured
The effect of block, the epoxy dried hanging hang structure adhesive curing after 3 minutes unscrew the screw in angle steel set strap, unload L-shaped angle steel cuff
Item, and by the gap filler joint filling of the gap between RPC cushion blocks；
Step 5, RPC cushion blocks surface wrap up CFRP, are first being pasted onto the one layer of primer of RPC cushion blocks outer surface painting being reinforced on column,
Then the outside for the RPC cushion blocks for being coated with primer is wrapped in after CFRP being infiltrated with epoxy glue, the lap of splice of the ends CFRP is not small
In 200mm, that is, complete the additional cushion block construction of carbon cloth reinforced reinforced concrete square columns；
The RPC cushion blocks be modulated dimension make, paste it into be reinforced on column when, such as encounter the seam less than 100mm
When gap size, cutting benefit is carried out to rectangle cushion block according to actual conditions and is filled out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611066674.7A CN106592997B (en) | 2016-11-29 | 2016-11-29 | The carbon cloth reinforced additional cushion block construction method of reinforced concrete square columns |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611066674.7A CN106592997B (en) | 2016-11-29 | 2016-11-29 | The carbon cloth reinforced additional cushion block construction method of reinforced concrete square columns |
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| CN106592997A CN106592997A (en) | 2017-04-26 |
| CN106592997B true CN106592997B (en) | 2018-11-06 |
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| CN107829568A (en) * | 2017-10-27 | 2018-03-23 | 广东工业大学 | The small-bore FRP pipes reinforced steel concrete rod structure of prefabricated concrete filled and method |
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|---|---|---|---|---|
| CN202945818U (en) * | 2012-11-26 | 2013-05-22 | 方泰建设集团有限公司 | Carbon fiber cloth reinforced reinforcement concrete square column structure |
| 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 |
| CN104032974A (en) * | 2014-05-13 | 2014-09-10 | 同济大学 | Method for reinforcing steel component and structure of reinforced steel component |
| CN204001715U (en) * | 2014-08-29 | 2014-12-10 | 中国建筑第四工程局有限公司 | A kind of L-type tool-type column template bracing means |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040067335A1 (en) * | 2002-10-07 | 2004-04-08 | Guoqiang Li | Repair of damaged concrete columns or other structures using fast-curing, fiber-reinforced polymer composites |
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- 2016-11-29 CN CN201611066674.7A patent/CN106592997B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202945818U (en) * | 2012-11-26 | 2013-05-22 | 方泰建设集团有限公司 | Carbon fiber cloth reinforced reinforcement concrete square column structure |
| 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 |
| CN104032974A (en) * | 2014-05-13 | 2014-09-10 | 同济大学 | Method for reinforcing steel component and structure of reinforced steel component |
| CN204001715U (en) * | 2014-08-29 | 2014-12-10 | 中国建筑第四工程局有限公司 | A kind of L-type tool-type column template bracing means |
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Application publication date: 20170426 Assignee: Guilin Han Sounding Technology Co.,Ltd. Assignor: GUILIN University OF TECHNOLOGY Contract record no.: X2022450000479 Denomination of invention: Construction method of adding cushion blocks to reinforced concrete square columns strengthened with carbon fiber sheet Granted publication date: 20181106 License type: Common License Record date: 20221229 |
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