CN104695720A - Method for reinforcing steel structure through FRP (Fiber Reinforced Polymer) - Google Patents
Method for reinforcing steel structure through FRP (Fiber Reinforced Polymer) Download PDFInfo
- Publication number
- CN104695720A CN104695720A CN201310657191.4A CN201310657191A CN104695720A CN 104695720 A CN104695720 A CN 104695720A CN 201310657191 A CN201310657191 A CN 201310657191A CN 104695720 A CN104695720 A CN 104695720A
- Authority
- CN
- China
- Prior art keywords
- frp
- steel
- reinforcing
- reinforced polymer
- pitch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Working Measures On Existing Buildindgs (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a method for reinforcing a steel structure through FRP (Fiber Reinforced Polymer). The FRP adopted in the invention is carbon fibre reinforced polymer (CFRP), specifically, mesophase pitch (MP) based carbon fiber is used as raw material, the mesophase pitch based carbon fiber is the fiber obtained by spinning processing of pitch obtained through thermal polymerization of isotropic pitch with high aroma content, and having a mesophase or liquid-crystal structure, and the stress performance of the fiber is improved, so that a reinforcing effect is realized. The method has the characteristics that since the fiber reinforced polymer (FRP) has the characteristics of being high in specific strength and specific stiffness, and corrosion-resistant, the fiber reinforced polymer (FRP) is widely applied to reinforcing of a concrete structure, and the steel structure reinforced through the fiber reinforced polymer (FRP) has a good effect. The method for reinforcing the steel structure through the fiber reinforced polymer (FRP) has the characteristics that the specific strength is high, rapid construction is achieved, and bearing capacity of the structure is obviously improved after construction.
Description
Technical field
The invention discloses a kind of method that FRP reinforces steel work, particularly based on the reinforcement means of carbon fiber (CFRP).
Background technology
In-service steel work, as bridge, building, structure, coastal and offshore engineering, petrochemical industry pressure vessel, pipeline, tower mast etc., because various defect may be produced in design, manufacture, work progress, in use because the reasons such as overload, corrosion, fatigue can cause the damage accumulation of structure, thus affect the safety of structure.Traditional steel structure reinforcing method is connected, rivets or bond to the damage location of original structure Plate Welding, bolt, though these methods improve original structure rejected region force-bearing situation to a certain extent, but serve new problem to structure band again, as produced new damage and welding residual stress etc. simultaneously.
In order to overcome the problems referred to above, the present invention designs a kind of method that FRP reinforces steel work, fibre reinforced composites (Fiber Reinforced Polymer, being called for short FRP) structural strengthening technology then overcomes the shortcoming of various method above, and due to FRP specific strength and specific modulus is high, corrosion-resistant and the feature such as easy construction, be widely used in concrete structure reinforcement reparation.Research in recent years shows, FRP reinforces steel work and also demonstrates good effect.
Summary of the invention
Object of the present invention is exactly the defect existed for prior art, invents a kind of method that FRP reinforces steel work.Its technical scheme is a kind of method that FRP reinforces steel work, it is characterized in that: that the FRP in the present invention adopts is carbon fibre reinforced composite (CFBR), specifically with mesophase spherule drop (MP) base carbon fibre for raw material, mesophase pitch-based carbon fibers is that the pitch with mesophase spherule or liquid crystal structure obtained by the same sex pitch of thermal polymerization high aromatic content is carried out spinning processing and the fiber made, and obtains the FRP in the present invention.
FRP reinforcement and repair steel work adopts FRP plate (or cloth) to paste steel structure member damage location or harmless girder steel position, improves or improve its stress performance, realize reinforcement effect.
The weak link of FRP reinforcing steel work is the bonding adhesive between steel and FRP interface, and the present invention adopts the epobond epoxyn of two component, has the advantages that bonding is strong, connectivity is good.Before stickup CFRP, the process strengthening steel surface can strengthen sticking strength and durability.Surfacing or blasting treatment can remove iron rust, various coating and paint from steel structure surface, strengthen bond effect.When CFRP being pasted in 15h after surfacing completes, otherwise adhesion strength can be reduced.Application acceleration maintenance process, such as electric blanket or heater improve the maintenance speed of cementing agent.
Embody rule situation has: flexural member reinforcing (comprising the reinforcing of the reinforcing of not damaged defect girder steel, damage girder steel), the reinforcing of tension (pressure) component, Fatigue Consolidation.
Feature of the present invention is: fiber-reinforced composite material (FRP) is due to the feature such as have specific strength and specific stiffness is high, corrosion-resistant, and be used widely in concrete structure reinforcement, FRP reinforces steel work and also demonstrates good effect.FBR material has higher modulus of elasticity, and intensity is high; Stress relaxation is little, and namely keep length constant at material, stress increases in time and reduces slowly; There is good anti-fatigue performance; There is good endurance quality, as frost resistance, resistance to weathering, resistance to chemical attack, fatigue behaviour, impact toughness etc.FRP reinforce steel work method have have that specific strength is high, quick construction, the features such as structural bearing capacity significantly improves after construction.
Detailed description of the invention
A kind of FRP reinforces the method for steel work, that it is characterized in that the FRP employing in the present invention is carbon fibre reinforced composite (CFBR), specifically with mesophase pitch (MP) base carbon fibre for raw material, mesophase pitch-based carbon fibers is that the pitch with mesophase spherule or liquid crystal structure obtained by the same sex pitch of thermal polymerization high aromatic content is carried out spinning processing and the fiber made, and obtains the FRP in the present invention.
FRP reinforcement and repair steel work adopts FRP plate (or cloth) to paste harmless girder steel position, improves or improve its stress performance.
The weak link of FRP reinforcing steel work is the bonding adhesive between steel and FRP interface, adopts the epobond epoxyn of two component, has the advantages that bonding is strong, connectivity is good.Before stickup CFRP, the process strengthening steel surface can strengthen sticking strength and durability.Surfacing or blasting treatment can remove iron rust, various coating and paint from steel structure surface, strengthen bond effect.When CFRP being pasted in 15h after surfacing completes, otherwise adhesion strength can be reduced.Application acceleration maintenance process, such as electric blanket or heater improve the maintenance speed of cementing agent.
The reinforcing of not damaged defect girder steel: after the process such as steel surface rust cleaning, first pasted aluminum alloy honeycomb plate, can improve the bending resistance anti-pressure ability of steel like this, obtain the effect of reinforcing steel before stickup CFRP plate.
Claims (4)
1. the method for a FRP reinforcing steel work, it is characterized in that: based on the reinforcement means of carbon fiber (CFRP), with mesophase pitch (MP) base carbon fibre for raw material, mesophase pitch-based carbon fibers is that the pitch with mesophase spherule or liquid crystal structure obtained by the same sex pitch of thermal polymerization high aromatic content is carried out spinning processing and the fiber made, and obtains the FRP in the present invention.
2. a kind of FRP according to claim 1 reinforces the method for steel work, it is characterized in that: FRP reinforcement and repair steel work adopts FRP plate (or cloth) to paste steel structure member damage location or harmless girder steel position, improve or improve its stress performance, realizing reinforcement effect.
3. a kind of FRP according to claim 1 reinforces the method for steel work, it is characterized in that: the present invention adopts the epobond epoxyn of two component, there is bonding strong, the feature that connectivity is good, before stickup CFRP, the process strengthening steel surface can strengthen sticking strength and durability, surfacing or blasting treatment can remove iron rust from steel structure surface, various coating and paint, strengthen bond effect, when pasting CFRP in 15h after surfacing completes, otherwise can adhesion strength be reduced, , with acceleration maintenance process, such as electric blanket or heater improve the maintenance speed of cementing agent.
4. a kind of FRP according to claim 1 reinforces the method for steel work, it is characterized in that: embody rule situation has: flexural member is reinforced (comprising the reinforcing of the reinforcing of not damaged defect girder steel, damage girder steel), the reinforcing, Fatigue Consolidation etc. of tension (pressure) component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310657191.4A CN104695720A (en) | 2013-12-09 | 2013-12-09 | Method for reinforcing steel structure through FRP (Fiber Reinforced Polymer) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310657191.4A CN104695720A (en) | 2013-12-09 | 2013-12-09 | Method for reinforcing steel structure through FRP (Fiber Reinforced Polymer) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104695720A true CN104695720A (en) | 2015-06-10 |
Family
ID=53343231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310657191.4A Pending CN104695720A (en) | 2013-12-09 | 2013-12-09 | Method for reinforcing steel structure through FRP (Fiber Reinforced Polymer) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104695720A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714695A (en) * | 2016-02-18 | 2016-06-29 | 沈阳建筑大学 | Anchoring structure for reinforcing T beam FRP |
| CN105714696A (en) * | 2016-03-14 | 2016-06-29 | 岩土科技股份有限公司 | Concrete bridge plate reinforcing method |
| CN105714700A (en) * | 2016-04-29 | 2016-06-29 | 长安大学 | External reinforcing system and reinforcing method for concrete bridge deck slab body |
| CN106320730A (en) * | 2016-08-24 | 2017-01-11 | 广东工业大学 | Method for reinforcing hole edge cracks of steel plate with holes |
| CN109881577A (en) * | 2019-03-28 | 2019-06-14 | 北京工业大学 | A kind of steel and CFRP combined stress band and preparation method thereof |
| CN111379434A (en) * | 2018-12-28 | 2020-07-07 | 宝山钢铁股份有限公司 | Carbon fiber reinforcement method for crane beam with variable cross section |
| CN111877548A (en) * | 2020-08-07 | 2020-11-03 | 青岛理工大学 | Non-constrained connection node of support type damper and existing RC frame structure |
| CN113658181A (en) * | 2021-10-20 | 2021-11-16 | 山东天亚达新材料科技有限公司 | Method, device and equipment for repairing marine steel structure |
-
2013
- 2013-12-09 CN CN201310657191.4A patent/CN104695720A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714695A (en) * | 2016-02-18 | 2016-06-29 | 沈阳建筑大学 | Anchoring structure for reinforcing T beam FRP |
| CN105714696A (en) * | 2016-03-14 | 2016-06-29 | 岩土科技股份有限公司 | Concrete bridge plate reinforcing method |
| CN105714696B (en) * | 2016-03-14 | 2017-08-15 | 岩土科技股份有限公司 | Concrete bridge beam slab reinforcement means |
| CN105714700A (en) * | 2016-04-29 | 2016-06-29 | 长安大学 | External reinforcing system and reinforcing method for concrete bridge deck slab body |
| CN106320730A (en) * | 2016-08-24 | 2017-01-11 | 广东工业大学 | Method for reinforcing hole edge cracks of steel plate with holes |
| CN111379434A (en) * | 2018-12-28 | 2020-07-07 | 宝山钢铁股份有限公司 | Carbon fiber reinforcement method for crane beam with variable cross section |
| CN109881577A (en) * | 2019-03-28 | 2019-06-14 | 北京工业大学 | A kind of steel and CFRP combined stress band and preparation method thereof |
| CN111877548A (en) * | 2020-08-07 | 2020-11-03 | 青岛理工大学 | Non-constrained connection node of support type damper and existing RC frame structure |
| CN111877548B (en) * | 2020-08-07 | 2021-09-14 | 青岛理工大学 | Non-constrained connection node of support type damper and existing RC frame structure |
| CN113658181A (en) * | 2021-10-20 | 2021-11-16 | 山东天亚达新材料科技有限公司 | Method, device and equipment for repairing marine steel structure |
| CN113658181B (en) * | 2021-10-20 | 2021-12-28 | 山东天亚达新材料科技有限公司 | Method, device and equipment for repairing marine steel structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104695720A (en) | Method for reinforcing steel structure through FRP (Fiber Reinforced Polymer) | |
| He et al. | Debonding of CFRP-to-steel joints with CFRP delamination | |
| Liu et al. | Effect of fatigue loading on bond strength between CFRP sheets and steel plates | |
| Pang et al. | Experimental study on the bond behavior of CFRP-steel interfaces under quasi-static cyclic loading | |
| CN102049230B (en) | Preparation and application of cement material self-repairing molecular self-assembled microspheres | |
| CN102729544A (en) | FRP (Fiber Reinforced Polymer)-steel advanced composite material for structure reinforcement and preparation method thereof | |
| CN208578344U (en) | A kind of intermediate plate type articulated anchor device of fiber reinforced composite board | |
| Borrie et al. | Fatigue performance of CFRP patched pre-cracked steel plates after extreme environmental exposure | |
| CN108149848A (en) | The composite anchorage and its installation method of FRP presstressed reinforcing steels | |
| CN107905126A (en) | A kind of detachable pre-stressed fiber cloth stretching and anchoring device | |
| CN101725256B (en) | Method for reinforcing wood beam by carbon fiber | |
| CN204060021U (en) | The concrete beam that a kind of FRP plate is reinforced | |
| CN205116773U (en) | Wire net mixes fiber reinforced concrete reinforced structure | |
| Liu et al. | Synergistic effect of acidic environmental exposure and fatigue loads on FRP tendons | |
| Colombi et al. | Fatigue behavior of cracked steel beams reinforced by using CFRP materials | |
| Kabir et al. | Effects of layer orientation of CFRP strengthened hollow steel members | |
| CN104060536A (en) | Basalt fiber composite reinforcement | |
| Korminejad et al. | Experimental and numerical analyses of damaged-steel plate reinforced by CFRP patch in moisture and the acidic environment under tensile test | |
| CN216475887U (en) | Novel interface FRP section bar-concrete combination beam | |
| Cyril Thomas et al. | Testing and evaluation of bond surface profile influencing the CFRP strengthening of steel members | |
| CN106320730A (en) | Method for reinforcing hole edge cracks of steel plate with holes | |
| CN104060537B (en) | Basalt fibre compound stay cable | |
| Abdel-Rahman et al. | An overview of fibre reinforced concrete, FRC and fibres properties and current applications | |
| CN104405136B (en) | The method that non-stretching type fiber prestress applies | |
| CN112249896B (en) | Method for reinforcing and repairing damaged steel pipe structure of hoisting machine by carbon fiber cloth |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150610 |