CN107672194A - A kind of FRP stirrups with ribbing and preparation method - Google Patents
A kind of FRP stirrups with ribbing and preparation method Download PDFInfo
- Publication number
- CN107672194A CN107672194A CN201710806419.XA CN201710806419A CN107672194A CN 107672194 A CN107672194 A CN 107672194A CN 201710806419 A CN201710806419 A CN 201710806419A CN 107672194 A CN107672194 A CN 107672194A
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- Prior art keywords
- frp
- core
- ribbing
- stirrups
- cross rib
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
- E04C5/073—Discrete reinforcing elements, e.g. fibres
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a kind of FRP stirrups with ribbing and preparation method, the FRP with ribbing is made up of core, the collection of filaments, external mold；Described core and outer mould surface has cross rib groove, and resin is filled up in cross rib groove, obtains FRP winding pipe using wet winding technology technique, FRP stirrups finished product with ribbing is obtained after cutting.The preparation method step：(1) fill up resin in the inner side cross rib groove of core and core is installed to wrapping machine；(2) fiber is wound on core using wet winding technology technique；(3) resin is filled up in the outside cross rib groove of external mold, carries out matched moulds；(4) assembly is put into heating chamber after the completion of matched moulds to be heating and curing；(5) demoulding obtains FRP winding pipe after cooling down；(6) FRP winding pipe is cut into final FRP stirrups finished product with ribbing according to design width with cutting blade.FRP stirrups with ribbing prepared by the present invention have that fiber is continuous, and fibre tensile strength is high, and grip of concrete is strong, and production efficiency is high, low cost and other advantages.
Description
Technical field
The present invention relates to a kind of fibrous composite processing method, a kind of particularly a kind of band being applied in civil engineering
Rib FRP stirrups and preparation method.
Background technology
With large-scale economic construction and construction industry high speed development, various new materials constantly gush like the mushrooms after rain
It is existing.How to utilize high performance material and combined with traditional material, creatively apply, be overcome in architectural engineering
The deficiency of traditional material, and the advantages of combination new material and traditional material, put in face of researcher.
In reinforced concrete structure, stirrup plays shearing resistance, reduces crack, form steel reinforcement cage, prevent vertical muscle flexing, constraint
The important function such as core concrete.Therefore, stirrup performance can be increased substantially as stirrup using the FRP tendons of high-strength light,
So as to improve the performance equipped with FRP tendons concrete component.On the other hand, it is right because stirrup is in the outermost of concrete structure
In the external world, corrosion is more sensitive, therefore can preferably solve corrosion using the original stirrup muscle of corrosion resistant FRP tendons replacement and ask
Topic so that concrete structure can be used in the more serious environment of the corrosion such as ocean.
FRP (Fiber Reinforced Polymer) muscle is mainly made up of two sections of material：A part is reinforcing fiber,
It is main to play transmission and supporting role, it is the main body of stress；Another part is synthetic resin, plays bonding and plastotype in the composite
Effect, forms entirety by fibre bundle, enables the common stress of filament, while and can protects filament from mechanical damage and change
Learn corrosion.
In civil engineering Practical Project, FRP stirrups are mostly closed.At present, FRP stirrups mainly have two kinds of sides of preparation
Method：First method is to carry out twice bended after using thermoplastic FRP stirrup pultrusion.Experimental study discovery, brake forming
FRP stirrups afterwards, it can be significantly reduced in the intensity of bending section, its value is generally the 30%~80% of straightway.Second method
It is that FRP stirrups are prepared using die pressing, although this method quality of finished product good, mould is complicated, low production efficiency, it is difficult to batch
Amount production.
In order to improve the adhesive property of FRP stirrups and concrete, field of civil engineering is frequently with following several measure means
FRP stirrups surface is processed：(1) in the preceding spiral wound fibre bundle on muscle of FRP stirrups solidification；(2) Mechanical Method is used
Directly FRP stirrups surface is processed；(3) it is in screw thread, scab or pressure on surface rolling ripple, the surface for making muscle with haulage chain
Trace shape；(4) FRP stirrups are allowed to be formed concavo-convex by the die head with concavo-convex inner surface；(5) fiber woven belt is used on FRP stirrups
Son, formed concavo-convex；(6) on FRP stirrups surface coated with shot-like particle or chopped fiber.Wherein method (1) to (4) is only applicable to linear pattern
FRP tendons, it is not readily applicable in flexure type FRP tendons (such as stirrup in beam or post).Method (5) and (6) are not straight lines by FRP tendons
The limitation of type or flexure type, but surface adhesiveness can be poor, is easily extracted from concrete, it is impossible to effectively given play to composite wood
The advantage of material.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of FRP stirrups with ribbing and preparation method.This hair
The bright adhesive property that with the two-sided FRP stirrups with ribbing of high efficiency production, can effectively improve FRP tendons and concrete.
The purpose of the present invention is achieved through the following technical solutions：
A kind of FRP stirrups with ribbing and preparation method, it is characterised in that：The FRP stirrups with ribbing are by core (1), fiber
(2), external mold (3), winding control machine (6), resin (8) and cutting blade (11) etc. are prepared；Described core (1) and external mold
(3) there is cross rib groove (4) on surface, and resin (8) is filled up in cross rib groove (4), and FRP windings are obtained using wet winding technology technique
Manage (10), FRP stirrups finished product (12) with ribbing is obtained after cutting.
Described core (1) is hollow rectangular section, and the corner of core (1) is provided with circular arc chamfering；Core (1) surface is equal
Even smearing release agent.
Described cross rib groove (4) shape is trapezoidal, and the spacing of cross rib groove (4) cannot be greater than FRP stirrup thickness
0.7 times, the angle of cross rib groove (4) side and core (1) surface cannot be less than 45 °.
The described uniform smearing release agent in external mold (3) surface, surface set outside cross rib groove (5) and core (1) surface
The specification of the inner side cross rib groove (4) of setting is the same.
Described wet winding technology technique is by after fiber (2) impregnation, and core (1) is directly wound under tension force
On.
The outer surface of described FRP winding pipe (10) and inner surface are both provided with cross rib；By FRP winding pipe (10) by cutting
FRP stirrups finished product (12) with ribbing is obtained after cutting blade (11) cutting.
A kind of FRP stirrups with ribbing of the present invention and preparation method, are prepared as follows：
(1) fill up resin in the inner side cross rib groove of core and core is installed on wrapping machine；
(2) fiber is wound on core by using wet winding technology technique；
(3) resin is filled up in the outside cross rib groove of external mold, and carries out matched moulds；
(4) assembly is put into heating chamber after the completion of matched moulds to be heating and curing；
(5) demoulding obtains FRP winding pipe after supercooling；
(6) FRP winding pipe is cut into final FRP stirrups finished product with ribbing according to design width with cutting blade.
Matched moulds in described step (4) is heating and curing, and warm temperature and time are determined according to resin model.
The cutter of described step (6) can select fibre resin cutting sheet or diamond cutting cutter or chopper, specifically
Cutting method needs to be determined according to actual conditions.
The beneficial effects of the present invention are：
A kind of FRP stirrups with ribbing of the present invention and preparation method, using winding shaping process, manufactured FRP stirrups are in ring
Upper fiber is successively opened, and stirrup intensity can be effectively ensured；Inner core corner chamfering seamlessly transits in winding shaping process, can protect
The fiber in card stirrup knee does not have fold, and fiber is continuous, and stirrup knee intensity is high.The Internal core mould rigidity used is big, into
Product precision is good；The integrally formed resin cross rib of the present invention can effectively improve the extraction-resistant behavior of FRP stirrups, ensure FRP stirrups
Bonding between concrete.It is simultaneously high using winding shaping process production efficiency, it is suitable for producing in batches.
Brief description of the drawings
Fig. 1 is matched moulds schematic diagram；
Fig. 2 is matched moulds diagrammatic cross-section；
Fig. 3 is the Wrapping formed schematic diagram of FRP stirrups；
Fig. 4 is FRP winding pipe cutting schematic diagrams；
Fig. 5 is FRP stirrups finished product schematic diagram with ribbing.
Embodiment
The present invention is described in more detail below in conjunction with the accompanying drawings, the present embodiment premised on the technical solution of the present invention under enter
Row is implemented, and gives detailed embodiment, but protection scope of the present invention is not limited to following implementations.
The invention provides a kind of FRP stirrups with ribbing and preparation method.The present invention can be two-sided with ribbing with high efficiency production
FRP stirrups, the adhesive property of FRP tendons and concrete can be effectively improved.
The purpose of the present invention is achieved through the following technical solutions：
A kind of FRP stirrups with ribbing and preparation method, the FRP stirrups with ribbing are controlled by core 1, fiber 2, external mold 3, winding
Machine 6, resin 8 and cutting blade 11 etc. are prepared；Described core 1 and the surface of external mold 3 has cross rib groove, is filled out in cross rib groove
Full resin 8, obtains FRP winding pipe 10 using wet winding technology technique, FRP stirrups finished product 12 with ribbing is obtained after cutting.
A kind of FRP stirrups with ribbing of the present invention and preparation method, are prepared by following detailed step：
Step 1, with reference to shown in Fig. 1, core 1 is hollow rectangular section, and the material of core 1 is mild steel.The corner of core 1
Circular arc chamfering is provided with, does not have inner side cross rib groove 4 at chamfering.With reference to shown in Fig. 2, core 1 and the surface of external mold 3 have inner side horizontal
Costal fovea groove 4 and outside cross rib groove 5.All cross rib groove shapes are trapezoidal, and the spacing of cross rib groove cannot be greater than FRP stirrups
The angle on 0.7 times of thickness, cross rib groove side and surface cannot be less than 45 °.With reference to shown in Fig. 2, uniformly smeared on core 1
Releasing agent, then by resin brush on core 1.It is required that resin is fully filled with inner side cross rib groove 4, and cross rib resin must have
Enough viscosity, it is ensured that big flowing will not occur.With reference to shown in Fig. 3, core 1 is installed on wrapping machine.
Step 2, with reference to shown in Fig. 3, first by fiber yarn 7 by dolly built with resin 8 carry out impregnation, then
It is wound under tension force on core 1.Fiber 2 has certain tension force during due to winding, so fiber 2 will not enter inner side
In cross rib groove 4.Winding control machine 6 can control the rotation of core 1, so as to control the tension force of fiber 2.In addition, winding control machine 6
Motion of the dolly equipped with resin 8 on carriage walking beam 9 can be controlled, so as to control the winding angle of fiber 2.
Step 3, with reference to shown in Fig. 1 and Fig. 2, the related fiber 2 of core 1 is taken from winding control machine 6 after the completion of winding
Under, then carry out matched moulds.The smearing release agent uniform first of external mold 3, then by resin brush on external mold 3, it is desirable to which resin is filled out completely
Full outside cross rib groove 5, cross rib resin must have enough viscosity, it is ensured that big flowing will not occur.Equally, in tension force effect
Under, fiber 2 will not enter in outside cross rib groove 5.With reference to shown in Fig. 1, one shares four pieces of external molds 3, respectively from four direction
Apply 0.02~0.06MPa pressure to fiber 2, under external pressure, fiber 2 will be more closely knit, so as to higher strong
Degree.Pressure should not be too big, and fiber 2 can be pressed into inner side cross rib groove 4 and outside cross rib groove 5 by excessive pressure.
Step 4, assembly is put into heating chamber after the completion of matched moulds and is heating and curing, acid extraction is according to tree
Epoxy-type number is determined, and solidification temperature is generally 80~150 DEG C, and hardening time is generally 2~3h.
Step 5, assembly is taken out into heating chamber, and natural cooling at room temperature after the completion of solidification, by core 1 after cooling
Taken out from FRP winding pipe 10.Glass fibre thermal coefficient of expansion is (2.7~7.2) × 10-6/ DEG C, mild steel thermal coefficient of expansion is
(11.3~13) × 10-6/℃.Because mild steel thermal coefficient of expansion is more than glass fibre thermal coefficient of expansion, so the FRP after cooling
Winding pipe 10 can separate with core 1 naturally.
Step 6, with reference to shown in Fig. 4, the FRP winding pipe 10 after solidification is cut according to design width using cutting blade 11
It is cut into final FRP stirrups finished product 12 with ribbing.The width of stirrup is not preferably greater than 1.5 times of FRP stirrup thickness.Cutting blade 11 has more
Selection is planted, it is necessary to be determined according to fiber type and fiber wind angle, fibre resin cutting sheet or diamond can be selected
Cutting sheet or chopper, specific cutting method need to be determined according to actual conditions.
It is FRP stirrups finished product with ribbing with reference to shown in Fig. 5, the two-sided (inner side and outer with ribbing of FRP stirrups with ribbing of the invention
Side), stirrup extraction-resistant behavior is good；Cross rib and fiber are integrally formed, and cross rib is not in stripping problem；Fiber is continuous, stirrup intensity
It is high.
Above is the exemplary embodiments of the present invention, and protection scope of the present invention is not limited to this, and it is any to be familiar with this skill
The technical staff in art field the invention discloses technical scope in, the change or replacement that can readily occur in, should all cover at this
Within the protection domain of invention.Therefore, protection scope of the present invention should be defined by the protection domain of claims.
Claims (9)
1. a kind of FRP stirrups with ribbing and preparation method, it is characterised in that：The FRP stirrups with ribbing are by core (1), the collection of filaments
(2), external mold (3), winding control machine (6), resin (8) and cutting blade (11) etc. are prepared；Described core (1) and external mold
(3) there is cross rib groove (4) on surface, and resin (8) is filled up in cross rib groove (4), and FRP windings are obtained using wet winding technology technique
Manage (10), FRP stirrups finished product (12) with ribbing is obtained after cutting.
2. a kind of FRP stirrups with ribbing according to claim 1 and preparation method, it is characterised in that：Described core (1) is
Hollow rectangular section, the corner of core (1) are provided with circular arc chamfering；The uniform smearing release agent in core (1) surface.
3. a kind of FRP stirrups with ribbing according to claim 1 and preparation method, it is characterised in that：Described cross rib groove
(4) shape is trapezoidal, and the spacing of cross rib groove (4) cannot be greater than 0.7 times of FRP stirrup thickness, cross rib groove (4) side with
The angle on core (1) surface cannot be less than 45 °.
4. a kind of FRP stirrups with ribbing according to claim 1 and preparation method, it is characterised in that：Described external mold (3) table
The uniform smearing release agent in face, surface set outside cross rib groove (5) and the inner side cross rib groove (4) of core (1) surface setting
Specification is the same.
5. a kind of FRP stirrups with ribbing according to claim 1 and preparation method, it is characterised in that：Described Wet Winding Process
Moulding process is by after the collection of filaments (2) impregnation, is directly wound under tension force on core (1).
6. a kind of FRP stirrups with ribbing according to claim 1 and preparation method, it is characterised in that：Described FRP winding pipe
(10) outer surface and inner surface is both provided with cross rib；Band is obtained after FRP winding pipe (10) is cut by cutting blade (11)
Rib FRP stirrups finished product (12).
7. a kind of FRP stirrups with ribbing and preparation method, it is characterised in that comprise the following steps to be prepared：
(1) fill up resin in the inner side cross rib groove of core and core is installed on wrapping machine；
(2) fiber is wound on core by using wet winding technology technique；
(3) resin is filled up in the outside cross rib groove of external mold, and carries out matched moulds；
(4) assembly is put into heating chamber after the completion of matched moulds to be heating and curing；
(5) demoulding obtains FRP winding pipe after supercooling；
(6) FRP winding pipe is cut into final FRP stirrups finished product with ribbing according to design width with cutting blade.
8. a kind of FRP stirrups with ribbing according to claim 7 and preparation method, it is characterised in that：In described step (4)
Matched moulds be heating and curing, warm temperature and time are determined according to resin model.
9. a kind of FRP stirrups with ribbing according to claim 7 and preparation method, it is characterised in that：Described step (6)
Cutter (11) can select fibre resin cutting sheet or diamond cutting cutter or chopper, and specific cutting method is needed according to reality
Situation determines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710806419.XA CN107672194A (en) | 2017-09-08 | 2017-09-08 | A kind of FRP stirrups with ribbing and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710806419.XA CN107672194A (en) | 2017-09-08 | 2017-09-08 | A kind of FRP stirrups with ribbing and preparation method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109129801A (en) * | 2018-10-10 | 2019-01-04 | 南京林业大学 | A kind of continuous bamboo wood stirrup production method of annular |
| CN109551780A (en) * | 2018-12-19 | 2019-04-02 | 南京锋晖复合材料有限公司 | A kind of production technology of FRP closed stirrup |
| CN110370686A (en) * | 2019-08-13 | 2019-10-25 | 核工业第八研究所 | A kind of double composite material enhancing ring manufacture crafts |
| CN110821047A (en) * | 2019-12-13 | 2020-02-21 | 南通装配式建筑与智能结构研究院 | Composite steel bar FRP stirrup and preparation method thereof |
| WO2020053550A1 (en) * | 2018-09-12 | 2020-03-19 | Lentus Composites Limited | Manufacture of annular components |
| CN112140593A (en) * | 2020-09-09 | 2020-12-29 | 长安大学 | On-site forming device and method for non-linear FRP (fiber reinforced plastic) ribs |
| CN113386367A (en) * | 2021-05-27 | 2021-09-14 | 江苏弄潮儿复合材料有限公司 | U-shaped reinforced carbon fiber plate and processing technology thereof |
| CN114889171A (en) * | 2022-05-19 | 2022-08-12 | 南京理工大学 | Core die and preparation method of unidirectional winding plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104890253A (en) * | 2015-06-11 | 2015-09-09 | 长沙丰博环保科技有限公司 | Glass fiber reinforced plastic inner reinforcing rib wound integrated vessel and production process and equipment thereof |
| CN105109066A (en) * | 2015-08-13 | 2015-12-02 | 江苏恒神股份有限公司 | Molding technology of single-ring closed type fiber reinforced resin base composite material stirrups |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104890253A (en) * | 2015-06-11 | 2015-09-09 | 长沙丰博环保科技有限公司 | Glass fiber reinforced plastic inner reinforcing rib wound integrated vessel and production process and equipment thereof |
| CN105109066A (en) * | 2015-08-13 | 2015-12-02 | 江苏恒神股份有限公司 | Molding technology of single-ring closed type fiber reinforced resin base composite material stirrups |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020053550A1 (en) * | 2018-09-12 | 2020-03-19 | Lentus Composites Limited | Manufacture of annular components |
| CN109129801A (en) * | 2018-10-10 | 2019-01-04 | 南京林业大学 | A kind of continuous bamboo wood stirrup production method of annular |
| CN109551780A (en) * | 2018-12-19 | 2019-04-02 | 南京锋晖复合材料有限公司 | A kind of production technology of FRP closed stirrup |
| CN109551780B (en) * | 2018-12-19 | 2020-08-11 | 南京锋晖复合材料有限公司 | Production process of FRP (fiber reinforced plastic) closed stirrup |
| CN110370686A (en) * | 2019-08-13 | 2019-10-25 | 核工业第八研究所 | A kind of double composite material enhancing ring manufacture crafts |
| CN110370686B (en) * | 2019-08-13 | 2021-03-12 | 核工业第八研究所 | Manufacturing process of double-composite material reinforced ring |
| CN110821047A (en) * | 2019-12-13 | 2020-02-21 | 南通装配式建筑与智能结构研究院 | Composite steel bar FRP stirrup and preparation method thereof |
| CN112140593A (en) * | 2020-09-09 | 2020-12-29 | 长安大学 | On-site forming device and method for non-linear FRP (fiber reinforced plastic) ribs |
| CN113386367A (en) * | 2021-05-27 | 2021-09-14 | 江苏弄潮儿复合材料有限公司 | U-shaped reinforced carbon fiber plate and processing technology thereof |
| CN114889171A (en) * | 2022-05-19 | 2022-08-12 | 南京理工大学 | Core die and preparation method of unidirectional winding plate |
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Application publication date: 20180209 |