CN110173125A - A kind of method of the external prestressing transplanting anti-bend reinforced beam of steel plate - Google Patents
A kind of method of the external prestressing transplanting anti-bend reinforced beam of steel plate Download PDFInfo
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- CN110173125A CN110173125A CN201910289214.8A CN201910289214A CN110173125A CN 110173125 A CN110173125 A CN 110173125A CN 201910289214 A CN201910289214 A CN 201910289214A CN 110173125 A CN110173125 A CN 110173125A
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- steel plate
- reinforcement
- steel
- processed
- external prestressing
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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
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
Abstract
The present invention relates to building girder reinforcement technique fields, and in particular to a kind of method of the external prestressing transplanting anti-bend reinforced beam of steel plate includes the following steps: (S1), treats reinforcement progress status identification, then chooses steel plate to be processed by design requirement；(S2), the steel plate to be processed is stretched, so that the elongation of the steel plate to be processed is reached design requirement, obtains pre-stressed steel plate；(S3), the bottom surface polishing and cleaning treatment to described to reinforcement, then by the pre-stressed steel plate with to reinforcement against；(S4), the pre-stressed steel plate is fixed on the bottom to reinforcement.The method increase the bending strengths to reinforcement, improve the utilization rate of steel plate materials, solve the problems, such as structural stress lag, the bearing capacity to reinforcement is improved, is conducive to earthquake-resistant structure, is conducive to the utilization of space, without formwork, easy to operate, easy to control, cost is relatively low for engineering material.
Description
Technical field
The present invention relates to building girder reinforcement technique fields, and in particular to a kind of external prestressing transplanting anti-bend reinforced beam of steel plate
Method.
Background technique
Building renovation reinforce be the building function of existing building Years Of Service for a long time or newly change and generate social
There are relevant design specification and corresponding acceptance criteria in industry, the personal safety of this Relationship to people, country.
Reinforcement technique or measure are relatively more, it may be said that and it can delay the service life of building and generate social value, these
Technology respectively has advantage and disadvantage and using above there is specific range, is all passive reinforcement method to most of beam type flexural member, and passive
Method for strengthening specification and engineering experience comparative maturity, but passive reinforcement method haves the defects that stress lag, moreover passive enforcement
The rigidity deformation analysis specification of method does not have theoretical formula checking computations.It is exactly active reinforcement method for another solution, is being added
Gu the problem of component applies external prestressing, can solve component stress lag, applies prestressed method one to component
As have falling temperature method, support displacement method etc., prestressed material has some Materials with High Strength such as carbon fiber, steel strand wires, reinforcing bar, but carbon fiber
It cannot be given full play to again with steel strand wires in the upper strength of materials of reinforcing, cause the waste of material.
Summary of the invention
In order to overcome shortcoming and defect existing in the prior art, the purpose of the present invention is to provide a kind of external prestressings
The method for transplanting the anti-bend reinforced beam of steel plate, by after steel plate stretching to be processed again against and be fixed on bottom to reinforcement, thus
Reach external prestressing to migrate to reinforcement to play reinforcement and strengthening effect, improve the bending strength to reinforcement, improves
The utilization rate of steel plate materials solves the problems, such as structural stress lag, improves the bearing capacity to reinforcement, and it is anti-to be conducive to structure
Shake；Compared with increasing beam section method for strengthening, the method for the external prestressing transplanting anti-bend reinforced beam of steel plate of the invention, which is more saved, is built
The space built is conducive to the utilization of space, and the less strenthening member self weight of consumptive material is lighter, without formwork, easy to operate, control
Convenient, cost is relatively low for engineering material.
The purpose of the invention is achieved by the following technical solution: a kind of side of the external prestressing transplanting anti-bend reinforced beam of steel plate
Method includes the following steps:
(S1), it treats reinforcement and carries out status identification, then choose steel plate to be processed by design requirement；
(S2), composition tensioning self equilibrium systems are connect with the steel plate to be processed using tensioning equipment and are stretched described wait locate
Steel plate is managed, so that the elongation of the steel plate to be processed is reached design requirement, obtains pre-stressed steel plate；
(S3), the bottom surface polishing and cleaning treatment to described to reinforcement, then by the pre-stressed steel plate with wait reinforce
Beam against；
(S4), the pre-stressed steel plate is run through using fastener and implantation is described to reinforcement, by the prestress steel
Plate is fixed on the bottom to reinforcement, completes external prestressing and transplants the anti-bend reinforced beam of steel plate.
Preferably, in the step (S1), according to it is described to reinforcement needed for bearing capacity with the determination steel to be processed
The physical quantity of plate, the physical quantity are at least one of thickness, initial length, width, stress, strain and elongation.
Preferably, in the step (S2), the both ends of the steel plate to be processed are connected separately with the first fixed block and second
Fixed block；The tensioning equipment includes the flexible steel sleeve for being resisted against the steel plate to be processed, is located in flexible steel sleeve
First power transmission steel member and the second power transmission steel member, the pressurization being located between the first power transmission steel member and the second power transmission steel member
Equipment, the flexible steel sleeve is between first fixed block and the second fixed block.
Preferably, the tensioning equipment further includes the first stiffening plate and second for being respectively arranged at the both ends of flexible steel sleeve
Stiffening plate, first stiffening plate are connect by the first pin with the first power transmission steel member, and second stiffening plate passes through
Second pin is connect with the second power transmission steel member.
Preferably, in the step (S3), the grinding process is polished using Buddha's warrior attendant sanding head, and the cleaning treatment uses
Acetone cleaning.
Preferably, the step (S3) further include: the pre-stressed steel plate with to reinforcement against before, to described pre-
Stress steel plate applies steel bonding glue close to the one side to reinforcement.
Preferably, in the step (S4), the fastener is screw rod or chemical bolt.
Preferably, the step (S4) further include: after being implanted into the fastener, in the side to reinforcement and institute
State the bottom surface setting hoop plate of pre-stressed steel plate.
Preferably, the step (S4) further include: the surface of the pre-stressed steel plate is coated with Fireproof antirust coating.
It, will be to the beneficial effects of the present invention are the method for the external prestressing transplanting anti-bend reinforced beam of steel plate of the invention
After processing steel plate stretching again against and be fixed on bottom to reinforcement, thus reach external prestressing migrate to reinforcement with
Reinforcement and strengthening effect is played, the bending strength to reinforcement is improved, the utilization rate of steel plate materials is improved, solves structural stress
The problem of lag, improves the bearing capacity to reinforcement, is conducive to earthquake-resistant structure；Compared with increasing beam section method for strengthening, the present invention
The method of the external prestressing transplanting anti-bend reinforced beam of steel plate more save the space of building, be conducive to the utilization of space, consume
Material less strenthening member self weight is lighter, and without formwork, easy to operate, easy to control, cost is relatively low for engineering material.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of external prestressing transplanting steel plate of the invention；
Fig. 2 is the sectional view of A-A in Fig. 1；
Fig. 3 is the structural schematic diagram that the present invention makes the pre-stressed steel plate.
Appended drawing reference are as follows: 1, to reinforcement；2, steel plate to be processed；3, tensioning equipment；31, stretch steel sleeve；32, it first passes
Power steel member；33, the second power transmission steel member；34, pressurized equipment；35, the first stiffening plate；36, the second stiffening plate；4, prestress steel
Plate；5, fastener；6, the first fixed block；7, the second fixed block；8, the first pin；9, the second pin；10, plate is bound round.
Specific embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further below with reference to examples and drawings
Bright, the content that embodiment refers to not is limitation of the invention.
As shown in Figure 1-3, a kind of method of the external prestressing transplanting anti-bend reinforced beam of steel plate, includes the following steps:
(S1), it treats reinforcement 1 and carries out status identification, then choose steel plate 2 to be processed by design requirement；
(S2), connect using tensioning equipment 3 with the steel plate 2 to be processed composition tensioning self equilibrium systems and stretch it is described to
Steel plate 2 is handled, so that the elongation of the steel plate to be processed 2 is reached design requirement, obtains pre-stressed steel plate 4；
(S3), the bottom surface polishing and cleaning treatment to described to reinforcement 1, then by the pre-stressed steel plate 4 with it is to be added
Gu beam 1 against；
(S4), the pre-stressed steel plate 4 is run through using fastener 5 and implantation is described to reinforcement 1, by the prestressing force
Steel plate 4 is fixed on the bottom to reinforcement 1, completes external prestressing and transplants the anti-bend reinforced beam of steel plate.
The method that the external prestressing transplants the anti-bend reinforced beam of steel plate, after steel plate 2 to be processed is stretched again against and it is fixed
In the bottom to reinforcement 1, migrates to reinforcement 1 to reach external prestressing to play reinforcement and strengthening effect, improve
To the bending strength of reinforcement 1, the utilization rate of steel plate materials is improved, structural stress lag is solved the problems, such as, improves wait reinforce
The bearing capacity of beam 1, is conducive to earthquake-resistant structure；Compared with increasing beam section method for strengthening, external prestressing of the invention transplants steel plate
The method of anti-bend reinforced beam more saves the space of building, is conducive to the utilization of space, and consumptive material less makes strenthening member certainly
Weight is lighter, and without formwork, easy to operate, easy to control, cost is relatively low for engineering material.
Wherein, in step (S1), the purpose for carrying out status identification is described to carrying needed for reinforcement 1 in order to obtain
Power, and then suitable steel plate 2 to be processed is chosen, prestressing force is wanted lower than described to reinforcement 1 after avoiding steel plate 2 to be processed from handling
Ask and cause structural stability difference and safety it is low.In step (S2), the steel plate to be processed is extended using the tensioning equipment 3
2 and the elongation of design requirement is obtained, to obtain the prestressing force generated by 2 tensile deformation of steel plate to be processed.Step (S3)
In, polishing and cleaning treatment with obtain relative smooth to 1 bottom surface of reinforcement, avoid because of the bottom surface bumps to reinforcement 1
It is uneven and lead to 4 local pressure of pre-stressed steel plate.In step (S4), the fastener 5 be implanted into it is described to reinforcement 1, both
The pre-stressed steel plate 4 can be made to be anchored on the bottom to reinforcement 1, the pre-stressed steel plate 4 is avoided to loosen, prevent because
Caused structural stress to lag by secondary loading is generated in exogenic processes, and be capable of fixing the position of the pre-stressed steel plate 4, prevented
The pre-stressed steel plate 4 deviates.
In the present embodiment, in the step (S1), according to it is described to bearing capacity needed for reinforcement 1 with determine described in
The physical quantity of steel plate 2 is handled, the physical quantity is at least one in thickness, initial length, width, stress, strain and elongation
Kind.
By it is described to bearing capacity needed for reinforcement 1 based on, steel plate 2 to be processed is calculated according to mechanics of materials formula
Physical quantity, the physical quantity include at least thickness, initial length, stress, strain and elongation, the width of steel plate 2 to be processed
Can be depending on the width to reinforcement 1, the mechanics of materials formula that the present invention uses includes at least:
σ=F ÷ A, wherein σ indicates that stress, F indicate the axle power of cross section, and A indicates the area of cross section；
ε=△ L ÷ L, wherein ε indicates strain, and L indicates that initial length, △ L indicate elongation；
σ=E ε, wherein E indicates that young's modulus, σ indicate that stress, ε indicate strain；
And the external prestressing strengthening section in " GB 50367-2013 concrete structure reinforcement design specification " is by curved structure
The normal section bearing capacity formula of part.
Determine the physical quantity of the steel plate to be processed 2, convenient for steel plate 2 to be processed by scheduled elongation at
Reason prevents the elongation of the pre-stressed steel plate 4 from leading to that stress is relatively low lower than design requirement and reduces the stability of reinforcement,
The elongation of the pre-stressed steel plate 4 is prevented to be higher than design requirement and the steel plate to be processed 2 is caused to be broken and scrap.
In the present embodiment, in the step (S2), the both ends of the steel plate 2 to be processed are connected separately with the first fixed block
6 and second fixed block 7；The tensioning equipment 3 includes the flexible steel sleeve 31 for being resisted against the steel plate to be processed 2, is located in
The the first power transmission steel member 32 and the second power transmission steel member 33 of flexible steel sleeve 31 are located in the first power transmission steel member 32 and second
Pressurized equipment 34 between power transmission steel member 33, the flexible steel sleeve 31 are located at first fixed block 6 and the second fixed block 7
Between.
By adopting the above technical scheme, it is passed using the flexible steel sleeve 31 of tensioning equipment 3, the first power transmission steel member 32, second
Power steel member 33 and pressurized equipment 34, so that the steel plate to be processed 2 generates certain deformation, it is suffered to cope with structure itself
The load arrived is finally reached design requirement so that the steel plate to be processed 2 be made to obtain certain elongation.In use, described add
Equipment 34 is pressed to extend to its both ends, the first power transmission steel member 32 and the second power transmission steel member 33 obtain contrary, size respectively
Identical power so that the first power transmission steel member 32 and the second power transmission steel member 33 respectively with the first fixed block 6 and the second fixed block 7
Against the pressurized equipment 34 is further extended to its both ends, so that the steel plate to be processed 2 be made to generate certain deformation.Institute
It states the first fixed block 6 and the second fixed block 7 to be not only convenient for stretching force being transferred to the steel plate to be processed 2, but also runs through in fastener 5
Pre-stressed steel plate 4 avoids damaging the pre-stressed steel plate 4 during being implanted into reinforcement 1.
In the present embodiment, the tensioning equipment 3 further include be respectively arranged at flexible steel sleeve 31 both ends first plus
Strong plate 35 and the second stiffening plate 36, first stiffening plate 35 are connect by the first pin 8 with the first power transmission steel member 32,
Second stiffening plate 36 is connect by the second pin 9 with the second power transmission steel member 33.
By adopting the above technical scheme, first fixed block 6 and 7 stress of the second fixed block are more advantageous to and is transferred to described
Steel plate 2 to be processed avoids the steel plate to be processed 2 from bending in stretching process and deformation thus ejects the tensioning equipment 3
And cause safety accident；First stiffening plate 35, the second stiffening plate 36, the first pin 8 and the second pin 9 are removably
It is set to the both ends of the tensioning equipment 3.
In the present embodiment, in the step (S3), the grinding process is polished using Buddha's warrior attendant sanding head, at the cleaning
Reason is cleaned using acetone.
It is polished using Buddha's warrior attendant sanding head, so that the bottom surface to reinforcement 1 is formed the new face of closely knit concrete structure, using acetone
The component faying face for having greasy dirt object is cleaned in cleaning, guarantees the flatness and cleanliness of the bottom surface to reinforcement 1.
In the present embodiment, the step (S3) further include: the pre-stressed steel plate 4 with to reinforcement 1 against before,
Steel bonding glue is applied close to the one side to reinforcement 1 to the pre-stressed steel plate 4.
By adopting the above technical scheme, i.e. the pre-stressed steel plate 4 and steel bonding glue forms steel bonding, and steel bonding glue is by the prestressing force
Steel plate 4 closely bonds to form unified entirety to reinforcement 1 with described, and steel bonding glue can normal stress work after being fully cured
Make, common bending resistance, the more effective bearing capacity improved to reinforcement 1 improves structural seismic capacity and space utilization rate.Steel-bonded reinforcement
Beam type flexural member is the technical solution of relative ideal, because of the intensity of the pre-stressed steel plate 4 and strain relatively reinforcing bar,
But steel-bonded reinforcement the problem of there is also Stress resorts, and the present invention in such a way that external prestressing transplants steel bonding in steel-bonded reinforcement
Flexural member is more advantageous to and overcomes the problems, such as that structural stress lags, provides safeguard for structural safety.
Above-mentioned technical proposal improves holding for 10-60% on the basis of original bearing capacity that can bear to reinforcement 1
Carry power.
In the present embodiment, in the step (S4), the fastener 5 is screw rod or chemical bolt.
By adopting the above technical scheme, the fastener 5 of implantation is more firm, and the pre-stressed steel plate 4 is avoided to loosen or fall off.?
It is implanted into before the fastener 5, needs first to make first fixed block 6, the second fixed block 7 and the steel plate to be processed 2
Hole, convenient for the installation of fastener 5.In embodiment, the fastener 5 is screw rod, and in other embodiments, the fastener 5 is
Chemical bolt.
In the present embodiment, the step (S4) further include: after being implanted into the fastener 5, in the side to reinforcement 1
Face and the bottom surface of the pre-stressed steel plate 4 setting hoop plate 10.
By adopting the above technical scheme, on the one hand, the hoop plate 10 of setting improves the pre-stressed steel plate 4 and to reinforcement 1
Bond strength avoids the pre-stressed steel plate 4 from loosening or fall off；On the other hand, the hoop plate 10 itself is exactly integral structure,
It forms in the side to reinforcement 1 and the bottom surface of the pre-stressed steel plate 4 and is similar to U-shaped structure, to improve
The shearing strength to reinforcement 1.
In the present embodiment, the step (S4) further include: the surface of the pre-stressed steel plate 4 is applied coated with Fireproof antirust
Material.
By adopting the above technical scheme, it avoids the pre-stressed steel plate 4 from being exposed to for a long time in external environment to weather and institute
Stating pre-stressed steel plate 4 reduces the bending strength of the pre-stressed steel plate 4, and then leads to the bearing capacity of reinforcement
It reduces, has delayed the service life of reinforcement.
Above-described embodiment is the preferable implementation of the present invention, and in addition to this, the present invention can be realized with other way,
Do not depart under the premise of present inventive concept it is any obviously replace it is within the scope of the present invention.
Claims (9)
1. a kind of method of the external prestressing transplanting anti-bend reinforced beam of steel plate, characterized by the following steps:
(S1), it treats reinforcement and carries out status identification, then choose steel plate to be processed by design requirement；
(S2), composition tensioning self equilibrium systems are connect with the steel plate to be processed using tensioning equipment and stretch the steel to be processed
Plate makes the elongation of the steel plate to be processed reach design requirement, obtains pre-stressed steel plate；
(S3), the bottom surface polishing and cleaning treatment to described to reinforcement, then supports the pre-stressed steel plate with to reinforcement
It leans on；
(S4), the pre-stressed steel plate is run through using fastener and implantation is described to reinforcement, the pre-stressed steel plate is consolidated
Due to the bottom to reinforcement, completes external prestressing and transplant the anti-bend reinforced beam of steel plate.
2. a kind of method of external prestressing transplanting anti-bend reinforced beam of steel plate according to claim 1, it is characterised in that: institute
State in step (S1), according to it is described to reinforcement needed for bearing capacity with the physical quantity of the determination steel plate to be processed, the object
Reason amount is at least one of thickness, initial length, width, stress, strain and elongation.
3. a kind of method of external prestressing transplanting anti-bend reinforced beam of steel plate according to claim 1, it is characterised in that: institute
It states in step (S2), the both ends of the steel plate to be processed are connected separately with the first fixed block and the second fixed block；The tensioning dress
Set including be resisted against the steel plate to be processed flexible steel sleeve, be located in the first power transmission steel member and of flexible steel sleeve
Two power transmission steel members, the pressurized equipment being located between the first power transmission steel member and the second power transmission steel member, the flexible steel bushing
Pipe is between first fixed block and the second fixed block.
4. a kind of method of external prestressing transplanting anti-bend reinforced beam of steel plate according to claim 3, it is characterised in that: institute
Stating tensioning equipment further includes the first stiffening plate and the second stiffening plate for being respectively arranged at the both ends of flexible steel sleeve, and described first adds
Strong plate is connect by the first pin with the first power transmission steel member, and second stiffening plate passes through the second pin and described second
The connection of power transmission steel member.
5. a kind of method of external prestressing transplanting anti-bend reinforced beam of steel plate according to claim 1, it is characterised in that: institute
It states in step (S3), the grinding process is polished using Buddha's warrior attendant sanding head, and the cleaning treatment is cleaned using acetone.
6. a kind of method of external prestressing transplanting anti-bend reinforced beam of steel plate according to claim 1, it is characterised in that: institute
State step (S3) further include: the pre-stressed steel plate with to reinforcement against before, to the pre-stressed steel plate close to described
One side to reinforcement applies steel bonding glue.
7. a kind of method of external prestressing transplanting anti-bend reinforced beam of steel plate according to claim 1, it is characterised in that: institute
It states in step (S4), the fastener is screw rod or chemical bolt.
8. a kind of method of external prestressing transplanting anti-bend reinforced beam of steel plate according to claim 1, it is characterised in that: institute
State step (S4) further include: after being implanted into the fastener, at the side to reinforcement and the bottom of the pre-stressed steel plate
Face setting hoop plate.
9. a kind of method of external prestressing transplanting anti-bend reinforced beam of steel plate according to claim 1, it is characterised in that: institute
State step (S4) further include: the surface of the pre-stressed steel plate is coated with Fireproof antirust coating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910289214.8A CN110173125B (en) | 2019-04-11 | 2019-04-11 | Method for reinforcing beam by bending-resistant steel plate in external prestress transplantation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910289214.8A CN110173125B (en) | 2019-04-11 | 2019-04-11 | Method for reinforcing beam by bending-resistant steel plate in external prestress transplantation |
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| CN110173125A true CN110173125A (en) | 2019-08-27 |
| CN110173125B CN110173125B (en) | 2021-06-08 |
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Cited By (2)
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| CN110674454A (en) * | 2019-10-24 | 2020-01-10 | 同济大学建筑设计研究院(集团)有限公司 | Simplified calculation method for flexural bearing capacity of sticky steel reinforced prestressed concrete beam |
| CN115446977A (en) * | 2022-09-15 | 2022-12-09 | 河南省城乡规划设计研究总院股份有限公司 | Production device and method for reinforcing steel strand net reinforced ECC (error correction code) prefabricated slab for reinforcement and reinforcing method |
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| CN110173125B (en) | 2021-06-08 |
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