CN108560943A - The CFRP prestressing force assembled reinforcement means and reinforcement assembly of light steel flexural member - Google Patents
The CFRP prestressing force assembled reinforcement means and reinforcement assembly of light steel flexural member Download PDFInfo
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- CN108560943A CN108560943A CN201810315271.4A CN201810315271A CN108560943A CN 108560943 A CN108560943 A CN 108560943A CN 201810315271 A CN201810315271 A CN 201810315271A CN 108560943 A CN108560943 A CN 108560943A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 270
- 239000010959 steel Substances 0.000 title claims abstract description 270
- 239000004918 carbon fiber reinforced polymer Substances 0.000 title claims abstract description 139
- 230000002787 reinforcement Effects 0.000 title claims abstract description 64
- 238000004873 anchoring Methods 0.000 claims abstract description 33
- 238000005452 bending Methods 0.000 abstract description 35
- 230000006378 damage Effects 0.000 abstract description 24
- 238000000034 method Methods 0.000 abstract description 12
- 238000010276 construction Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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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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- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The present invention relates to the reinforcement means of light steel flexural member.This method includes：At least one middle part tensioning component is arranged between the both ends of the lower flange of the light steel flexural member；CFRP plates are passed through into the lower surface of the parallel lower flange for being fixed on the light steel flexural member of both ends anchoring assembly；And the adjustment middle part tensioning component, it is used to support the CFRP plates and is deformed towards the direction far from the light steel flexural member.The reinforcement means, simple and convenient, engineering practicability is strong, effectively increases anti-bending bearing capacity, bending stiffness and the fatigue life of light steel flexural member；And both ends anchoring assembly and middle part tensioning component with the use of the local stability for improving light steel flexural member web, improve the utilization rate of CFRP plates, avoid the stripping damage of CFRP plates.
Description
Technical field
The present invention relates to structure of steel product technical fields, in particular it relates to the reinforcement means of light steel flexural member, more
In particular it relates to the reinforcement means and reinforcement assembly of light steel flexural member.
Background technology
Lightweight steel construction is the steel structure system of a kind of young and great vitality, is widely used to general industrial or agricultural, quotient
Industry, service building, such as office building, villa, warehouse, stadiums, amusement, tourism building and low, multistoried housing construction neck
Domain.Lightweight steel construction refers to《Steel Portal Frames technical regulation》Defined has light-duty roof system and light-duty exterior wall
The single layer reality abdomen portal frame structure of (can also conditionally use building block exterior wall).Light steel or lightweight steel component then refer to light steel
C-type purlin on component in structure, such as light-duty roof system.
The validity of prestressed reinforcement steel construction is proven in many engineerings, can in actual engineer application
Prestress application on a certain or certain components, can also be applied over the entire structure.Apply prestressing force in steel construction,
The bearing capacity of component or structure can be improved, Reducing distortion achievees the purpose that saving steel, reduces project cost.
However, prestress strengthening method simple for process, engineering practicability is strong also needs further to study.
Invention content
The application is made to the discovery of following facts and problem and understanding based on inventor：
For light steel flexural member, by it is applied prestressing force can make structure do not generated under working load crack or
Fracture width reduces.It is many to apply prestressed method, there is antiarch method, direct stretching method, ripple anchorage stretching method etc..However this
A little methods use jack to carry out tensioning mostly, and complex process is not strong in practical engineering.Discovery based on the above issues,
Prefabricated CFRP prestress applications component is combined by inventor with CFRP plates, is realized to the lower flange of light steel flexural member
Prestressed reinforcement.The reinforcement process is simple and convenient, and engineering practicability is strong, effectively increases the bending resistance carrying of light steel flexural member
Power, bending stiffness and fatigue life；And the use of the prefabricated CFRP prestress application components improves light steel by curved structure
The local stability of part web improves the utilization rate of CFRP plates, avoids the stripping damage of CFRP plates.
For this purpose, in the first aspect of the present invention, the present invention proposes a kind of reinforcement means of light steel flexural member.According to this
The embodiment of invention, the reinforcement means include：At least one middle part tensioning component is arranged in the light steel flexural member
Between the both ends of lower flange；CFRP plates are passed through into the parallel lower flange for being fixed on the light steel flexural member of both ends anchoring assembly
Lower surface；And the adjustment middle part tensioning component, the CFRP plates are used to support towards the side far from the light steel flexural member
To being deformed；Wherein, the both ends anchoring assembly is arranged at the both ends of the lower flange of the light steel flexural member, the middle part
Tensioning component is arranged between the light steel flexural member and the CFRP plates.
Reinforcement means according to the ... of the embodiment of the present invention, simple and convenient, engineering practicability is strong, effectively increases light steel by curved structure
Anti-bending bearing capacity, bending stiffness and the fatigue life of part；And both ends anchoring assembly and middle part tensioning component are used cooperatively
The local stability for improving light steel flexural member web, improves the utilization rate of CFRP plates, and the stripping for avoiding CFRP plates is broken
It is bad.It should be noted that the reinforcement means reduces the vertical relative deformation of flexural member, stripping shear stress is reduced, to
Cohesive stripping damage is avoided, its ultimate bearing capacity is c correspondingly increased.In addition, the use of reinforcement means improves CFRP plates
Utilization rate needs the height of prodigious deformation competence exertion fiber to pretend this is because the intensity of CFRP plates is high, elasticity modulus is small
With, to CFRP by the reinforcement means apply pretension, can make CFRP structure destruction before give full play to its intensity.
According to an embodiment of the invention, above-mentioned reinforcement means can also further comprise following additional technical feature at least it
One：
According to an embodiment of the invention, there are one the middle part tensioning components, and it is arranged in the light steel by curved structure
The span centre of the lower flange of part.Reinforcement means according to the ... of the embodiment of the present invention is simpler and more direct, and engineering practicability is stronger, and cost is lower,
Effectively increase anti-bending bearing capacity, bending stiffness and the fatigue life of light steel flexural member；And both ends anchoring assembly and in
Tensioning component in portion's is used cooperatively the local stability for improving light steel flexural member web, improves the utilization rate of CFRP plates,
Avoid the stripping damage of CFRP plates.
According to an embodiment of the invention, the middle part tensioning component includes：The U-shaped hoop fixed plate of steel, the U-shaped hoop of steel are fixed
Plate is arranged between the both ends of the lower flange of the light steel flexural member and wraps the web of the light steel flexural member；Adjustment
Screw rod, the adjustment screw, which rotationally sequentially passes through, connects the U-shaped hoop fixed plate of steel and the light steel flexural member；With
And supporting surface, the supporting surface are vertically connected with the adjustment screw, be used to support the CFRP plates towards far from the light steel by
The direction of curved component is deformed.It should be noted that supporting surface is supported on CFRP plates, supporting surface and adjustment screw screw thread phase
Mutually cooperation.The distance between supporting surface and light steel flexural member can be adjusted by rotating adjustment screw, when distance increases,
The direction that supporting surface jack-up CFRP plates are directed away from light steel flexural member is deformed, to generate pre-tensile stress.According to this hair
The reinforcement means of bright embodiment is simpler and more direct, and engineering practicability is stronger, and cost is lower, further improves light steel flexural member
Anti-bending bearing capacity, bending stiffness and fatigue life improve the utilization rate of CFRP plates, avoid the stripping damage of CFRP plates；
Simultaneously because the U-shaped hoop fixed plate of steel has wrapped the web of light steel flexural member, to further improve light steel flexural member
The local stability of web.
According to an embodiment of the invention, the both ends anchoring assembly includes：The U-shaped hoop of steel, the U-shaped hoop of steel are arranged described
The both ends of the lower flange of light steel flexural member and the web for wrapping the light steel flexural member, are used for the two of the CFRP plates
End is compressed on the both ends of the lower flange of the light steel flexural member；And high-strength bolt, the high-strength bolt sequentially pass through connection
The U-shaped hoop of the steel, the CFRP plates and the light steel flexural member.Reinforcement means according to the ... of the embodiment of the present invention is simpler
Victory, engineering practicability is stronger, and cost is lower, further improve the anti-bending bearing capacity of light steel flexural member, bending stiffness and
Fatigue life improves the utilization rate of CFRP plates, avoids the stripping damage of CFRP plates；Simultaneously because the U-shaped hoop of steel wraps
The web of light steel flexural member, to further improve the local stability of light steel flexural member web.
In the second aspect of the present invention, the present invention proposes a kind of light steel flexural member reinforcement assembly.It is according to the present invention
Embodiment, the light steel flexural member reinforcement assembly include：Light steel flexural member；CFRP plates, the CFRP plates are arranged in parallel in
The underface of the lower flange of the light steel flexural member, and connect with the light steel flexural member, tie point is located at described light
The both ends of the lower flange of steel flexural member；And prefabricated CFRP prestress application components, the prefabricated CFRP prestressing force are applied
It includes both ends anchoring assembly and at least one middle part tensioning component to add component, and the both ends anchoring assembly is arranged in the tie point
Place, the both ends of the lower flange for the both ends of the CFRP plates to be fixed on to the light steel flexural member, it is described it is at least one in
Portion's tensioning component is arranged between the both ends of the lower flange of the light steel flexural member, and positioned at the light steel flexural member and
Between the CFRP plates, it is used to support the CFRP plates and is deformed towards the direction far from the light steel flexural member.
Light steel flexural member reinforcement assembly according to the ... of the embodiment of the present invention, simple and convenient, engineering practicability is strong, effectively improves
Anti-bending bearing capacity, bending stiffness and fatigue life of light steel flexural member；And the prefabricated CFRP prestress application groups
The use of part improves the local stability of light steel flexural member web, improves the utilization rate of CFRP plates, avoids CFRP plates
Stripping damage.It should be noted that the reinforcement assembly reduces the vertical relative deformation of flexural member, reduces stripping and cut and answer
Power c correspondingly increases its ultimate bearing capacity so as to avoid stripping damage is bonded.In addition, the use of reinforcement assembly improves
The utilization rate of CFRP plates needs prodigious deformation competence exertion fiber this is because the intensity of CFRP plates is high, elasticity modulus is small
High-strength effect applies pretension by the reinforcement assembly to CFRP, CFRP can be made to give full play to its intensity before structure destruction.
According to an embodiment of the invention, above-mentioned light steel flexural member reinforcement assembly can also further comprise following supplementary technology
At least one feature：
According to an embodiment of the invention, the prefabricated CFRP prestress application components include both ends anchoring assembly and one
The span centre in the lower flange of the light steel flexural member is arranged in middle part tensioning component, the middle part tensioning component.According to the present invention
The light steel flexural member reinforcement assembly of embodiment is simpler and more direct, and engineering practicability is stronger, and cost is lower, effectively increase light steel by
Anti-bending bearing capacity, bending stiffness and the fatigue life of curved component；And the use of prefabricated CFRP prestress application components carries
The high local stability of light steel flexural member web, improves the utilization rate of CFRP plates, avoids the stripping damage of CFRP plates.
According to an embodiment of the invention, the middle part tensioning component includes：The U-shaped hoop fixed plate of steel, the U-shaped hoop of steel are fixed
Plate is arranged between the both ends of the lower flange of the light steel flexural member and wraps the web of the light steel flexural member；Adjustment
Screw rod, the adjustment screw, which rotationally sequentially passes through, connects the U-shaped hoop fixed plate of steel and the light steel flexural member；With
And supporting surface, the supporting surface are vertically connected with the adjustment screw, be used to support the CFRP plates towards far from the light steel by
The direction of curved component is deformed.It should be noted that supporting surface is supported on CFRP plates, supporting surface and adjustment screw screw thread phase
Mutually cooperation.The distance between supporting surface and light steel flexural member can be adjusted by rotating adjustment screw, when distance increases,
The direction that supporting surface jack-up CFRP plates are directed away from light steel flexural member is deformed, to generate pre-tensile stress.According to this hair
The light steel flexural member reinforcement assembly of bright embodiment is simpler and more direct, and engineering practicability is stronger, and cost is lower, further improves light
Anti-bending bearing capacity, bending stiffness and the fatigue life of steel flexural member, the utilization rate of CFRP plates is improved, avoids CFRP plates
Stripping damage；Simultaneously because the U-shaped hoop fixed plate of steel has wrapped the web of light steel flexural member, it is light to further improve
The local stability of steel flexural member web.
According to an embodiment of the invention, the both ends anchoring assembly includes：The U-shaped hoop of steel, the U-shaped hoop of steel are arranged described
The both ends of the lower flange of light steel flexural member and the web for wrapping the light steel flexural member, are used for the two of the CFRP plates
End is compressed on the both ends of the lower flange of the light steel flexural member；And high-strength bolt, the high-strength bolt sequentially pass through connection
The U-shaped hoop of the steel, the CFRP plates and the light steel flexural member.Light steel flexural member according to the ... of the embodiment of the present invention is reinforced
Component is simpler and more direct, and engineering practicability is stronger, and cost is lower, further improves the anti-bending bearing capacity of light steel flexural member, resists
Curved rigidity and fatigue life improve the utilization rate of CFRP plates, avoid the stripping damage of CFRP plates；Simultaneously because steel is U-shaped
Hoop has wrapped the web of light steel flexural member, to further improve the local stability of light steel flexural member web.
Description of the drawings
Fig. 1 is the positive stereoscopic diagram of the structure of light steel flexural member reinforcement assembly according to the ... of the embodiment of the present invention；
Fig. 2 is that the overall structure front solid of the application of light steel flexural member reinforcement assembly according to the ... of the embodiment of the present invention is shown
It is intended to；
Fig. 3 is the reverse side stereoscopic schematic diagram of the structure of light steel flexural member reinforcement assembly according to the ... of the embodiment of the present invention；
Fig. 4 is that the overall structure reverse side solid of the application of light steel flexural member reinforcement assembly according to the ... of the embodiment of the present invention is shown
It is intended to；
Fig. 5 is application system overall schematic according to the ... of the embodiment of the present invention；And
Fig. 6 is the detailed schematic of middle part tensioning component and both ends anchoring assembly according to the ... of the embodiment of the present invention,
Wherein, (a) is the detailed schematic of middle part tensioning component, is (b) detailed schematic of both ends anchoring assembly.
Reference numeral：
100：Light steel flexural member
200：CFRP plates
310：Both ends anchoring assembly
311：The U-shaped hoop of steel
312：High-strength bolt
320：Middle part tensioning component
321：The U-shaped hoop fixed plate of steel
322：Adjustment screw
323：Supporting surface
400：Roof boarding
500：Ridge
600：Roof purline
700：Cornice purlin
800：Girder steel
900：Shingle nail
1000：Wall purlins
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings.Below with reference to
The embodiment of attached drawing description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The reinforcement means of light steel flexural member
In the first aspect of the present invention, the present invention proposes a kind of reinforcement means of light steel flexural member.According to the present invention
Embodiment, the reinforcement means includes：The bottom wing in the light steel flexural member is arranged at least one middle part tensioning component
Between the both ends of edge；CFRP plates are passed through into the following table of the parallel lower flange for being fixed on the light steel flexural member of both ends anchoring assembly
Face；And the adjustment middle part tensioning component, it is used to support the CFRP plates and is produced towards the direction far from the light steel flexural member
Change shape；Wherein, the both ends anchoring assembly is arranged in the both ends of the lower flange of the light steel flexural member, the middle part tensioning
Component is arranged between the light steel flexural member and the CFRP plates.
The reinforcement means, simple and convenient, engineering practicability is strong, effectively increase light steel flexural member anti-bending bearing capacity,
Bending stiffness and fatigue life；And both ends anchoring assembly and being used cooperatively for middle part tensioning component improve light steel by curved structure
The local stability of part web improves the utilization rate of CFRP plates, avoids the stripping damage of CFRP plates.It should be noted that
The reinforcement means reduces the vertical relative deformation of flexural member, reduces stripping shear stress, broken so as to avoid stripping is bonded
It is bad, c correspondingly increase its ultimate bearing capacity.In addition, the use of reinforcement means improves the utilization rate of CFRP plates, this is because
The intensity of CFRP plates is high, elasticity modulus is small, needs the high-strength effect of prodigious deformation competence exertion fiber, is added by this to CFRP
Solid method applies pretension, and CFRP can be made to give full play to its intensity before structure destruction.
Another embodiment according to the present invention, the middle part tensioning component only there are one, and be arranged the light steel by
The span centre of the lower flange of curved component.The reinforcement means is simpler and more direct, and engineering practicability is stronger, and cost is lower, effectively increases light
Anti-bending bearing capacity, bending stiffness and the fatigue life of steel flexural member；And both ends anchoring assembly and middle part tensioning component
With the use of the local stability for improving light steel flexural member web, the utilization rate of CFRP plates is improved, avoids CFRP plates
Stripping damage.
Another embodiment according to the present invention, the middle part tensioning component include：The U-shaped hoop fixed plate of steel, the U-shaped hoop of steel
Fixed plate is arranged between the both ends of the lower flange of the light steel flexural member and wraps the web of the light steel flexural member；
Adjustment screw, the adjustment screw, which rotationally sequentially passes through, connects the U-shaped hoop fixed plate of steel and the light steel by curved structure
Part；And supporting surface, the supporting surface are vertically connected with the adjustment screw, are used to support the CFRP plates towards far from described light
The direction of steel flexural member is deformed.It should be noted that supporting surface is supported on CFRP plates, supporting surface and adjustment screw spiral shell
Line cooperates.The distance between supporting surface and light steel flexural member can be adjusted by rotating adjustment screw, when distance increases
When big, the direction that supporting surface jack-up CFRP plates are directed away from light steel flexural member is deformed, to generate pre-tensile stress.It should add
Solid method is simpler and more direct, and engineering practicability is stronger, and cost is lower, further improve light steel flexural member anti-bending bearing capacity,
Bending stiffness and fatigue life improve the utilization rate of CFRP plates, avoid the stripping damage of CFRP plates；Simultaneously because steel U
Type hoop fixed plate has wrapped the web of light steel flexural member, to which the part for further improving light steel flexural member web is steady
It is qualitative.
Another embodiment according to the present invention, the both ends anchoring assembly include：The U-shaped hoop of steel, the U-shaped hoop setting of steel exist
The both ends of the lower flange of the light steel flexural member and the web for wrapping the light steel flexural member are used for the CFRP plates
Both ends be compressed on the light steel flexural member lower flange both ends；And high-strength bolt, the high-strength bolt sequentially pass through
Connect the U-shaped hoop of the steel, the CFRP plates and the light steel flexural member.The reinforcement means is simpler and more direct, engineering practicability
Stronger, cost is lower, further improves anti-bending bearing capacity, bending stiffness and the fatigue life of light steel flexural member, improves
The utilization rates of CFRP plates, avoids the stripping damage of CFRP plates；Simultaneously because the U-shaped hoop of steel has wrapped light steel flexural member
Web, to further improve the local stability of light steel flexural member web.
Light steel flexural member reinforcement assembly
In the second aspect of the present invention, the present invention proposes a kind of light steel flexural member reinforcement assembly.It is described with reference to figure 5
Light steel flexural member reinforcement assembly can be applied to roof purline 600 or cornice purlin 700.According to an embodiment of the invention, join
Fig. 1, Fig. 2, Fig. 3 and Fig. 4 are examined, the light steel flexural member reinforcement assembly includes：Light steel flexural member 100；CFRP plates 200,
The CFRP plates 200 are arranged in parallel in the underface of the lower flange of the light steel flexural member 100, and with the light steel by curved
Component 100 connects, and tie point is located at the both ends of the lower flange of the light steel flexural member；And prefabricated CFRP prestress applications
Component, the prefabricated CFRP prestress application components include both ends anchoring assembly 310 and at least one middle part tensioning component
320, the both ends anchoring assembly 310 is arranged at the tie point, described for being fixed on the both ends of the CFRP plates 200
The both ends of the lower flange of light steel flexural member 100, at least one middle part tensioning component 320 are arranged in the light steel by curved structure
Between the both ends of the lower flange of part 100, and between the light steel flexural member 100 and the CFRP plates 200, for branch
The CFRP plates are supportted to be deformed towards the direction far from the light steel flexural member.
The light steel flexural member reinforcement assembly, simple and convenient, engineering practicability is strong, effectively increases light steel flexural member
Anti-bending bearing capacity, bending stiffness and fatigue life；And the use of prefabricated CFRP prestress application components improves light steel
The local stability of flexural member web improves the utilization rate of CFRP plates, avoids the stripping damage of CFRP plates.It needs to illustrate
, which reduces the vertical relative deformation of flexural member, reduces stripping shear stress, so as to avoid stripping is bonded
From destruction, its ultimate bearing capacity is c correspondingly increased.In addition, the use of reinforcement assembly improves the utilization rate of CFRP plates, this is
Because the intensity of CFRP plates is high, elasticity modulus is small, the high-strength effect of prodigious deformation competence exertion fiber is needed, CFRP is passed through
The reinforcement assembly applies pretension, and CFRP can be made to give full play to its intensity before structure destruction.
Another embodiment according to the present invention, with reference to figure 1, Fig. 2, Fig. 3 and Fig. 4, the prefabricated CFRP prestressing force is applied
It includes both ends anchoring assembly 310 and a middle part tensioning component 320 to add component, and the middle part tensioning component 320 is arranged described
The span centre of the lower flange of light steel flexural member 100.The light steel flexural member reinforcement assembly is simpler and more direct, and engineering practicability is stronger,
Cost is lower, effectively increases anti-bending bearing capacity, bending stiffness and the fatigue life of light steel flexural member；And it is prefabricated
The use of CFRP prestress application components improves the local stability of light steel flexural member web, improves the utilization of CFRP plates
Rate avoids the stripping damage of CFRP plates.
Another embodiment according to the present invention, with reference to (a) in figure 6, the middle part tensioning component 320 includes：The U-shaped hoop of steel
Fixed plate 321, the U-shaped hoop fixed plate 321 of steel are arranged between the both ends of the lower flange of the light steel flexural member 100 and wrap
Wrap the web of the light steel flexural member 100；Adjustment screw 322, the adjustment screw 322 rotationally sequentially pass through connection
The U-shaped hoop fixed plate 321 of the steel and the light steel flexural member 100；And supporting surface 323, the supporting surface 323 with it is described
Adjustment screw 322 is vertically connected, and is used to support the CFRP plates 200 and is generated towards the direction far from the light steel flexural member 100
Deformation.It should be noted that supporting surface is supported on CFRP plates, supporting surface cooperates with adjustment screw screw thread.Supporting surface with
The distance between light steel flexural member can be adjusted by rotating adjustment screw, and when distance increases, supporting surface jacks up CFRP
The direction that plate is directed away from light steel flexural member is deformed, to generate pre-tensile stress.The light steel flexural member reinforcement assembly
Simpler and more direct, engineering practicability is stronger, and cost is lower, and anti-bending bearing capacity, the bending resistance for further improving light steel flexural member are rigid
Degree and fatigue life, the utilization rate of CFRP plates is improved, the stripping damage of CFRP plates is avoided；Simultaneously because the U-shaped hoop of steel is solid
Fixed board has wrapped the web of light steel flexural member, to further improve the local stability of light steel flexural member web.
Another embodiment according to the present invention, with reference to (b) in figure 6, the both ends anchoring assembly 310 includes：The U-shaped hoop of steel
311, the U-shaped hoop of the steel 311 is arranged the both ends in the lower flange of the light steel flexural member 100 and wraps the light steel by curved
The web of component 100, two of lower flange for the both ends of the CFRP plates 200 to be compressed on to the light steel flexural member 100
End；And high-strength bolt 312, the high-strength bolt 312 sequentially pass through the U-shaped hoop 311 of the connection steel, the CFRP plates 200 with
And the light steel flexural member 100.The light steel flexural member reinforcement assembly is simpler and more direct, and engineering practicability is stronger, and cost is lower,
Anti-bending bearing capacity, bending stiffness and the fatigue life for further improving light steel flexural member, improve the utilization of CFRP plates
Rate avoids the stripping damage of CFRP plates；Simultaneously because steel is U-shaped to bind round the web for having wrapped light steel flexural member, thus into one
Step improves the local stability of light steel flexural member web.
Embodiment
A kind of CFRP prestressing force assembled reinforcement assemblies of light steel flexural member, reinforcement assembly include：
Light steel flexural member, light steel flexural member are suitable for load bearing lightweight steel component, with reference to figure 5, such as Light roofing
C-type purlin 600 or 700；CFRP plates, CFRP plates are located on light steel flexural member, and there are two be connected to light steel to tool on CFRP plates
Tie point on flexural member；And prefabricated CFRP prestress application components.
A kind of CFRP prestressing force assembled reinforcement assemblies of light steel flexural member, prefabricated CFRP prestress application component packets
Include both ends anchoring assembly and middle part tensioning component：Both ends anchoring assembly be include punching the U-shaped hoop of steel and high-strength bolt, steel it is U-shaped
CFRP plates are compressed on light steel flexural member by hoop, and wrap the web of light steel flexural member, and high-strength bolt is connected to light steel
Between flexural member and the U-shaped hoop of steel, CFRP plates constitute above-mentioned company by the part that the U-shaped hoop of steel is suppressed and is connected with light steel flexural member
Contact.Middle part tensioning component is located at the span centre of light steel flexural member lower flange, middle part tensioning component include the U-shaped hoop fixed plate of steel,
Adjustment screw and supporting surface, the U-shaped hoop fixed plate of steel are fixed on the span centre of light steel flexural member lower flange and wrap its web, adjust
Whole screw rod is rotatably arranged on light steel flexural member, and supporting surface and adjustment screw screw-thread fit, adjustment screw support when rotating
The distance between face and light steel flexural member are adjustable, and supporting surface is supported on CFRP plates, supporting surface with light steel flexural member
The distance between can jack up the Direction distortion that CFRP plates are directed away from light steel flexural member when increasing.
A kind of CFRP prestressing force assembled reinforcement means of light steel flexural member, includes the following steps：Step 1：By middle part
The U-shaped fixed plate of steel of tensioning component is welded to connect the span centre in light steel flexural member lower flange, wherein middle part tensioning component also wraps
Adjustment screw and supporting surface are included, adjustment screw is rotatably arranged in the U-shaped fixed plate of steel, and supporting surface is matched with adjustment screw screw thread
It closes, middle part tensioning component is maintained at the closed state of the supporting surface fitting U-shaped fixed plate of steel；Step 2：By light steel flexural member bottom wing
Corresponding bolt hole is got at the both ends of edge, and by corresponding region ball blast or sandblasting, and the CFRP plates of non-tensioning are placed in middle part tensioning
On component, the U-shaped hoop of the steel of both ends anchoring assembly is pressed on CFRP plates, is then bolted on, thus by the both ends of CFRP plates
It is fixed on the both ends of light steel flexural member lower flange；Step 3：Adjustment screw on the tensioning component of rotation middle part so that CFRP plates
It is propped up come to generate pre-tensile stress.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be to be electrically connected or can communicate each other；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly.For this field
For those of ordinary skill, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (8)
1. a kind of reinforcement means of light steel flexural member, which is characterized in that including：
At least one middle part tensioning component is arranged between the both ends of the lower flange of the light steel flexural member；
CFRP plates are passed through into the lower surface of the parallel lower flange for being fixed on the light steel flexural member of both ends anchoring assembly；And
The middle part tensioning component is adjusted, the CFRP plates is used to support and generates change towards the direction far from the light steel flexural member
Shape；
Wherein, the both ends anchoring assembly is arranged in the both ends of the lower flange of the light steel flexural member, the middle part tensioning group
Part is arranged between the light steel flexural member and the CFRP plates.
2. reinforcement means according to claim 1, which is characterized in that there are one the middle part tensioning components, and sets
Set the span centre in the lower flange of the light steel flexural member.
3. reinforcement means according to claim 1 or 2, which is characterized in that the middle part tensioning component includes：
The U-shaped hoop fixed plate of steel, the U-shaped hoop fixed plate of steel are arranged between the both ends of the lower flange of the light steel flexural member simultaneously
Wrap the web of the light steel flexural member；
Adjustment screw, the adjustment screw rotationally sequentially pass through connect the U-shaped hoop fixed plate of steel and the light steel by
Curved component；And
Supporting surface, the supporting surface are vertically connected with the adjustment screw, are used to support the CFRP plates towards far from the light steel
The direction of flexural member is deformed.
4. reinforcement means according to claim 1 or 2, which is characterized in that the both ends anchoring assembly includes：
The U-shaped hoop of steel, the U-shaped hoop of the steel both ends in the lower flange of the light steel flexural member are set and wrap the light steel by
The web of curved component, the both ends of the lower flange for the both ends of the CFRP plates to be compressed on to the light steel flexural member；And
High-strength bolt, the high-strength bolt sequentially pass through the U-shaped hoop of the connection steel, the CFRP plates and the light steel by curved structure
Part.
5. a kind of light steel flexural member reinforcement assembly, which is characterized in that including：
Light steel flexural member；
CFRP plates, the CFRP plates are arranged in parallel in the underface of the lower flange of the light steel flexural member, and with it is described light
Steel flexural member connects, and tie point is located at the both ends of the lower flange of the light steel flexural member；And
Prefabricated CFRP prestress application components, the prefabricated CFRP prestress application components include both ends anchoring assembly and extremely
Few middle part tensioning component,
The both ends anchoring assembly is arranged at the tie point, for by the both ends of the CFRP plates be fixed on the light steel by
The both ends of the lower flange of curved component,
At least one middle part tensioning component is arranged between the both ends of the lower flange of the light steel flexural member, and is located at
Between the light steel flexural member and the CFRP plates, the CFRP plates are used to support towards the side far from the light steel flexural member
To being deformed.
6. light steel flexural member reinforcement assembly according to claim 5, which is characterized in that the prefabricated CFRP prestressing force
It includes both ends anchoring assembly and a middle part tensioning component to apply component, and one middle part tensioning component is arranged in the light steel
The span centre of the lower flange of flexural member.
7. light steel flexural member reinforcement assembly according to claim 5 or 6, which is characterized in that the middle part tensioning component
Including：
The U-shaped hoop fixed plate of steel, the U-shaped hoop fixed plate of steel are arranged between the both ends of the lower flange of the light steel flexural member simultaneously
Wrap the web of the light steel flexural member；
Adjustment screw, the adjustment screw rotationally sequentially pass through connect the U-shaped hoop fixed plate of steel and the light steel by
Curved component；And
Supporting surface, the supporting surface are vertically connected with the adjustment screw, are used to support the CFRP plates towards far from the light steel
The direction of flexural member is deformed.
8. light steel flexural member reinforcement assembly according to claim 5 or 6, which is characterized in that the both ends anchoring assembly
Including：
The U-shaped hoop of steel, the U-shaped hoop of the steel both ends in the lower flange of the light steel flexural member are set and wrap the light steel by
The web of curved component, the both ends of the lower flange for the both ends of the CFRP plates to be compressed on to the light steel flexural member；And
High-strength bolt, the high-strength bolt sequentially pass through the U-shaped hoop of the connection steel, the CFRP plates and the light steel by curved structure
Part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810315271.4A CN108560943A (en) | 2018-04-10 | 2018-04-10 | The CFRP prestressing force assembled reinforcement means and reinforcement assembly of light steel flexural member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810315271.4A CN108560943A (en) | 2018-04-10 | 2018-04-10 | The CFRP prestressing force assembled reinforcement means and reinforcement assembly of light steel flexural member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108560943A true CN108560943A (en) | 2018-09-21 |
Family
ID=63534567
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810315271.4A Pending CN108560943A (en) | 2018-04-10 | 2018-04-10 | The CFRP prestressing force assembled reinforcement means and reinforcement assembly of light steel flexural member |
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| CN (1) | CN108560943A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020159833A1 (en) * | 2019-01-28 | 2020-08-06 | Smith William E | Pre-stressed sinusoidal members in assembly and applications |
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| KR200193344Y1 (en) * | 2000-03-17 | 2000-08-16 | 박대열 | Assembly tensioning steel girder beam |
| CN101781936A (en) * | 2009-12-10 | 2010-07-21 | 中国建筑科学研究院 | Method and device for reinforcing beam by adopting prestressed carbon fiber plate |
| CN201649682U (en) * | 2010-04-27 | 2010-11-24 | 武汉大学 | Compound reinforcing concrete flexural member |
| CN107842210A (en) * | 2017-12-08 | 2018-03-27 | 清华大学 | The construction package and its method for applying prestressing force of CFRP plate multi-point support prestressed reinforcements |
| CN208267409U (en) * | 2018-04-10 | 2018-12-21 | 清华大学 | Light steel flexural member reinforcement assembly |
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| KR200193344Y1 (en) * | 2000-03-17 | 2000-08-16 | 박대열 | Assembly tensioning steel girder beam |
| CN101781936A (en) * | 2009-12-10 | 2010-07-21 | 中国建筑科学研究院 | Method and device for reinforcing beam by adopting prestressed carbon fiber plate |
| CN201649682U (en) * | 2010-04-27 | 2010-11-24 | 武汉大学 | Compound reinforcing concrete flexural member |
| CN107842210A (en) * | 2017-12-08 | 2018-03-27 | 清华大学 | The construction package and its method for applying prestressing force of CFRP plate multi-point support prestressed reinforcements |
| CN208267409U (en) * | 2018-04-10 | 2018-12-21 | 清华大学 | Light steel flexural member reinforcement assembly |
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| WO2020159833A1 (en) * | 2019-01-28 | 2020-08-06 | Smith William E | Pre-stressed sinusoidal members in assembly and applications |
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