CN106481026B - SMA-GFRP super-elasticity composite reinforcing and preparation method thereof - Google Patents
SMA-GFRP super-elasticity composite reinforcing and preparation method thereof Download PDFInfo
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- CN106481026B CN106481026B CN201611158952.1A CN201611158952A CN106481026B CN 106481026 B CN106481026 B CN 106481026B CN 201611158952 A CN201611158952 A CN 201611158952A CN 106481026 B CN106481026 B CN 106481026B
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- 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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Abstract
The present invention relates to a kind of SMA-GFRP super-elasticity composite reinforcings and preparation method thereof, a kind of preparation method of SMA-GFRP super-elasticity composite reinforcing, specific steps are as follows: a, the diameter for being 24% by percent by volume be superfine SMA of 0.5mm it is parallel with 44% GFRP tow or it is cyclic annular place, and it is solidificated between two kinds of fibers with flexible ethylene base ester resin matrix by pultrude process, the percent by volume of flexible ethylene base ester resin matrix is 32%, it is formed by pultrude process, section form uses circle identical with reinforcing bar；B, the anchoring between enhancing SMA-GFRP muscle and concrete, the surface of SMA-GFRP muscle are made into abnormity or surface scab processing.The present invention, have both ductility and corrosion resistance, GFRP tendons have been well solved in anti-seismic structure using limited problem, SMA-GFRP composite reinforcing is used for areas of plasticity hinge, improve the anti-seismic performance of structure, residual displacement accumulation after reducing consecutive shock, makes overall performance of the structure under consecutive shock disaster get a promotion.
Description
Technical field
The invention belongs to architectural and civil engineering Material Field, in particular to a kind of SMA-GFRP super-elasticity composite reinforcing and its
Preparation method.
Background technique
Traditional reinforced concrete structure mainly uses reinforcing bar as reinforcing rib, and practical experience for many years can be sent out
Existing, reinforcing bar has the following drawbacks: first, steel bars corrosion problem is extremely serious, the especially structure in coastal areas such as ocean, harbours
In, steel bar corrosion causes structural bearing capacity to substantially reduce, and is unable to reach expected service life, and huge maintenance and transformation takes
With the waste for causing resource；Permanent residual displacement occurs second, generating excessive deformation after reinforcement yielding and will lead to structure, so that
The integrated carrying ability of structure reduces.Especially when an earthquake occurs, the permanent plastic deformation of reinforcing bar is to cause armored concrete knot
The main reason for structure functionality destroys can also life-threatening safety in case of strong aftershock.
In order to solve the problems, such as the corrosion of reinforcing bar, glass fibre reinforced composion (GFRP) is because of its excellent corrosion resistance
And receive significant attention, since GFRP is a kind of fragile material, the application in anti-seismic structure is restricted.If GFRP tendons
Concrete structure can introduce ductility, then not only can solve corrosion problem, but also a large amount of energy that can dissipate in geological process
Amount, the use in anti-seismic structure will be no longer limited.Niti-shaped memorial alloy (Ni-Ti SMA: Nickel-
Titanium Shape Memory Alloy wires) there is super-elasticity and shape memory function, recoverable strain is up to 6% ~
8%, yield stress is more than 1000MPa in 400 ~ 500MPa or so, ultimate strength, and ultimate deformation is up to 25%, much higher than general gold
Belong to.Currently, the SMA-GFRP super-elasticity (superlastic made of mixing Ni-Ti SMA and GFRP tow and resin matrix
Property: refer to that sample generates the strain much larger than its elastic limit strain amount under external force, strain can be automatic extensive in unloading
Multiple phenomenon) composite reinforcing and preparation method thereof is there is not yet reported, and the optimal fiber hybrid ratio of three is research core.
Summary of the invention
The technical problem to be solved by the present invention is to how overcome the drawbacks described above of the prior art, it is super to provide a kind of SMA-GFRP
Elastic composite muscle.
In order to solve the above technical problems, the present invention also provides a kind of preparation methods of SMA-GFRP super-elasticity composite reinforcing.
Technical scheme is as follows:
A kind of this SMA-GFRP super-elasticity composite reinforcing, which includes SMA, GFRP tow and passes through pultrusion work
Skill is solidificated in the flexible ethylene base ester resin matrix between SMA and GFRP tow, SMA described (1), GFRP tow (2) with
And the percent by volume of flexible ethylene base ester resin matrix (3) is respectively 24%, 44% and 32%.
Be designed in this way, non-linear, hyperelastic SMA make SMA-GFRP composite reinforcing have flag-shaped hysteresis loops and prolong
Property, the damage accumulation generated under cyclic reversed loading is minimum, can effectively improve concrete structure in continuous strong earthquakes event
Under anti-seismic performance performance, and the smallest destruction is generated to concrete structure, after this is substantially better than traditional reinforcing bar by surrender
Permanent deformation is generated to realize ductility.In addition, mixing manufactured NEW TYPE OF COMPOSITE muscle with Ni-Ti SMA and GFRP is known as SMA-
GFRP composite reinforcing has both two features of ductility and corrosion resistance, has well solved GFRP tendons in anti-seismic structure using limited
Problem.In addition, basis material uses flexible ethylene base ester resin matrix, it is by bisphenol type or phenol aldehyde type epoxy resin and methyl-prop
A kind of denaturation epoxy resin that olefine acid reaction obtains is thermosetting resin, and this thermosetting resin adhesive strength and shock resistance are strong
Degree is big, elongation percentage is high, it is ensured that the SMA silk of high-elongation can give full play to its ductility, acted on by hysteresis and improve energy
Dissipation capabilities.
As optimization, SMA-GFRP composite reinforcing is used for the areas of plasticity hinge of beam column, in still using elsewhere for frame
GFRP tendons are as reinforcing rib, due to the higher cost of current Ni-Ti marmem, in this way, both can achieve desired effect,
Cost has been saved again.
As optimization, described SMA is placed in parallel with GFRP tow.
As optimization, described SMA and the placement of GFRP tow ring-type.
A kind of preparation method of SMA-GFRP super-elasticity composite reinforcing, specific steps are as follows:
A, by the diameter that percent by volume is 24% is 0.5mm, superfine SMA and 44% GFRP tow are placed in parallel, and
It is solidificated between two kinds of fibers with flexible ethylene base ester resin matrix by pultrude process, the body of flexible ethylene base ester resin matrix
Product percentage is 32%, is formed by pultrude process, and section form uses circle identical with reinforcing bar；
B, the anchoring between enhancing SMA-GFRP muscle and concrete, the surface of SMA-GFRP muscle are made into abnormity or surface scab
Processing.
A kind of preparation method of SMA-GFRP super-elasticity composite reinforcing, specific steps are as follows:
A, by the diameter that percent by volume is 24% is 0.5mm, superfine SMA and 44% GFRP tow ring-type are placed, and
It is solidificated between two kinds of fibers with flexible ethylene base ester resin matrix by pultrude process, the body of flexible ethylene base ester resin matrix
Product percentage is 32%, is formed by pultrude process, and section form uses circle identical with reinforcing bar；
B, the anchoring between enhancing SMA-GFRP muscle and concrete, the surface of SMA-GFRP muscle are made into abnormity or surface scab
Processing.
The beneficial effects of the present invention are:
The present invention has both two features of ductility and corrosion resistance, has well solved GFRP tendons and used in anti-seismic structure
SMA-GFRP composite reinforcing is used for areas of plasticity hinge, improves the anti-seismic performance of structure, reduce consecutive shock by limited problem
Residual displacement accumulation afterwards, makes overall performance of the structure under consecutive shock disaster get a promotion.In addition, the NEW TYPE OF COMPOSITE rigidity of soft tissues
Degree is high, ductility is good, and has shape memory function, and with gradualling mature for production technology, can promote in anti-seismic structure makes
With.
Detailed description of the invention
This SMA-GFRP super-elasticity composite reinforcing is described further with reference to the accompanying drawing:
Fig. 1 is the structural schematic diagram of the embodiment 1 of this SMA-GFRP super-elasticity composite reinforcing；
Fig. 2 is the structural schematic diagram of the embodiment 2 of this SMA-GFRP super-elasticity composite reinforcing.
In figure: 1 is SMA, 2 be GFRP tow, 3 is flexible ethylene base ester resin matrix.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, right hereinafter, referring to the drawings and the embodiments,
The present invention is further described.
Embodiment 1: as shown in Figure 1, this SMA-GFRP super-elasticity composite reinforcing, which includes SMA silk 1, GFRP tow 2
And the flexible ethylene base ester resin matrix 3 between SMA silk 1 and GFRP tow 2 is solidificated in by pultrude process；The SMA silk 1
It is placed in parallel with GFRP tow 2.
A kind of preparation method of SMA-GFRP super-elasticity composite reinforcing, specific steps are as follows:
A, the GFRP tow 2 for the superfine SMA silk 1 and 44% for being 0.5mm by the diameter that percent by volume is 24% is placed in parallel,
And it is solidificated between two kinds of fibers with flexible ethylene base ester resin matrix 3 by pultrude process, flexible ethylene base ester resin matrix 3
Percent by volume be 32%, formed by pultrude process, section form use circle identical with reinforcing bar；
B, the anchoring between enhancing SMA-GFRP muscle and concrete, the surface of SMA-GFRP muscle are made into abnormity or surface scab
Processing.
Embodiment 2: as shown in Fig. 2, this SMA-GFRP super-elasticity composite reinforcing, which includes SMA silk 1, GFRP tow 2
And the flexible ethylene base ester resin matrix 3 between SMA silk 1 and GFRP tow 2 is solidificated in by pultrude process；The SMA silk 1
With the cyclic annular placement of GFRP tow 2.
A kind of preparation method of SMA-GFRP super-elasticity composite reinforcing, specific steps are as follows:
A, the GFRP tow 2 for the superfine SMA silk 1 and 44% for being 0.5mm by the diameter that percent by volume is 24% is cyclic annular places,
And it is solidificated between two kinds of fibers with flexible ethylene base ester resin matrix 3 by pultrude process, flexible ethylene base ester resin matrix 3
Percent by volume be 32%, formed by pultrude process, section form use circle identical with reinforcing bar；
B, the anchoring between enhancing SMA-GFRP muscle and concrete, the surface of SMA-GFRP muscle are made into abnormity or surface scab
Processing.
Comparative example 1: as shown in Figure 1, this SMA-GFRP super-elasticity composite reinforcing, which includes SMA silk 1, GFRP
Tow 2 and the flexible ethylene base ester resin matrix 3 being solidificated in by pultrude process between SMA silk 1 and GFRP tow 2；It is described
SMA silk 1 and GFRP tow 2 are placed in parallel.
A kind of preparation method of SMA-GFRP super-elasticity composite reinforcing, specific steps are as follows:
A, the GFRP tow 2 for the superfine SMA silk 1 and 35.25% for being 0.5mm by the diameter that percent by volume is 31.75% is flat
Row is placed, and is solidificated between two kinds of fibers with flexible ethylene base ester resin matrix 3 by pultrude process, flexible ethylene base ester tree
The percent by volume of aliphatic radical body 3 is 33%, is formed by pultrude process, and section form uses circle identical with reinforcing bar；
B, the anchoring between enhancing SMA-GFRP muscle and concrete, the surface of SMA-GFRP muscle are made into abnormity or surface scab
Processing.Compared with embodiment 1, only SMA, CFRP tow and the percent by volume of flexible ethylene base ester resin matrix have change
Change.
Comparative example 2: as shown in Fig. 2, this SMA-GFRP super-elasticity composite reinforcing, which includes SMA silk 1, GFRP
Tow 2 and the flexible ethylene base ester resin matrix 3 being solidificated in by pultrude process between SMA silk 1 and GFRP tow 2；It is described
SMA silk 1 and the cyclic annular placement of GFRP tow 2.
A kind of preparation method of SMA-GFRP super-elasticity composite reinforcing, specific steps are as follows:
A, 2 ring of GFRP tow for the superfine SMA silk 1 and 35.25% for being 0.5mm by the diameter that percent by volume is 31.75%
Shape is placed, and is solidificated between two kinds of fibers with flexible ethylene base ester resin matrix 3 by pultrude process, flexible ethylene base ester tree
The percent by volume of aliphatic radical body 3 is 33%, is formed by pultrude process, and section form uses circle identical with reinforcing bar；
B, the anchoring between enhancing SMA-GFRP muscle and concrete, the surface of SMA-GFRP muscle are made into abnormity or surface scab
Processing.Compared with embodiment 2, only SMA, CFRP tow and the percent by volume of flexible ethylene base ester resin matrix have change
Change.
Comparative example 3: as shown in Figure 1, this SMA-GFRP super-elasticity composite reinforcing, which includes SMA silk 1, GFRP
Tow 2 and the flexible ethylene base ester resin matrix 3 being solidificated in by pultrude process between SMA silk 1 and GFRP tow 2；It is described
SMA silk 1 and GFRP tow 2 are placed in parallel.
A kind of preparation method of SMA-GFRP super-elasticity composite reinforcing, specific steps are as follows:
A, the GFRP tow 2 for the superfine SMA silk 1 and 28% for being 0.5mm by the diameter that percent by volume is 40% is placed in parallel,
And it is solidificated between two kinds of fibers with flexible ethylene base ester resin matrix 3 by pultrude process, flexible ethylene base ester resin matrix 3
Percent by volume be 32%, formed by pultrude process, section form use circle identical with reinforcing bar；
B, the anchoring between enhancing SMA-GFRP muscle and concrete, the surface of SMA-GFRP muscle are made into abnormity or surface scab
Processing.Compared with embodiment 1, only SMA, CFRP tow and the percent by volume of flexible ethylene base ester resin matrix have change
Change.
Comparative example 4: as shown in Fig. 2, this SMA-GFRP super-elasticity composite reinforcing, which includes SMA silk 1, GFRP
Tow 2 and the flexible ethylene base ester resin matrix 3 being solidificated in by pultrude process between SMA silk 1 and GFRP tow 2；It is described
SMA silk 1 and the cyclic annular placement of GFRP tow 2.
A kind of preparation method of SMA-GFRP super-elasticity composite reinforcing, specific steps are as follows:
A, the GFRP tow 2 for the superfine SMA silk 1 and 28% for being 0.5mm by the diameter that percent by volume is 40% is cyclic annular places,
And it is solidificated between two kinds of fibers with flexible ethylene base ester resin matrix 3 by pultrude process, flexible ethylene base ester resin matrix 3
Percent by volume be 32%, formed by pultrude process, section form use circle identical with reinforcing bar；
B, the anchoring between enhancing SMA-GFRP muscle and concrete, the surface of SMA-GFRP muscle are made into abnormity or surface scab
Processing.Compared with embodiment 2, only SMA, CFRP tow and the percent by volume of flexible ethylene base ester resin matrix have change
Change.
Comparative example 5: SMA single, compared with embodiment 2, only SMA percents by volume are 68%, CFRP tow
Percent by volume is 0%, and the percent by volume of flexible ethylene base ester resin matrix is 32%.
Comparative example 6: GFRP single, compared with embodiment 2, only SMA percents by volume are 0%, CFRP tow
Percent by volume is 68%, and the percent by volume of flexible ethylene base ester resin matrix is 32%.
Data Detection has been carried out to above-described embodiment and comparative example, the result is as follows:
Pass through all data in table, it is found that embodiment 1 and embodiment 2 are more excellent, and embodiment 2 is optimal.
Above-mentioned specific embodiment is only specific case of the invention, is not that the invention has other forms of limitations,
Any person skilled in the art is changed or is modified as equivalent variations possibly also with the technology contents of the disclosure above
Equivalent embodiment.But anything that does not depart from the technical scheme of the invention, implement according to the technical essence of the invention to above
Any simple modification, equivalent variations and remodeling, all shall fall within the protection scope of the present invention made by example.
Claims (2)
1. a kind of SMA-GFRP super-elasticity composite reinforcing, it is characterised in that: the composite reinforcing include SMA (1), GFRP tow (2) with
And the flexible ethylene base ester resin matrix (3) between SMA (1) and GFRP tow (2) is solidificated in by pultrude process, it is described
SMA (1), the percent by volume of GFRP tow (2) and flexible ethylene base ester resin matrix (3) be respectively 24%, 44% and
32%；
SMA described (1) and GFRP tow (2) are placed in parallel or cyclic annular placement.
2. a kind of preparation method of SMA-GFRP super-elasticity composite reinforcing, which is characterized in that specific steps are as follows:
A, it puts superfine SMA (1) that the diameter that percent by volume is 24% is 0.5mm are parallel with 44% GFRP tow (2)
It sets or ring-type is placed, and be solidificated between two kinds of fibers with flexible ethylene base ester resin matrix (3) by pultrude process, it is flexible
The percent by volume of vinyl ester matrix (3) is 32%, is formed by pultrude process, and section form is using identical as reinforcing bar
Circle；
B, the anchoring between enhancing SMA-GFRP muscle and concrete, the surface of SMA-GFRP muscle are made at abnormity or surface scab
Reason.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611158952.1A CN106481026B (en) | 2016-12-15 | 2016-12-15 | SMA-GFRP super-elasticity composite reinforcing and preparation method thereof |
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| CN201611158952.1A CN106481026B (en) | 2016-12-15 | 2016-12-15 | SMA-GFRP super-elasticity composite reinforcing and preparation method thereof |
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| EP3784844B1 (en) * | 2018-04-23 | 2024-06-05 | Owens Corning Intellectual Capital, LLC | Frp rebar and method of making same |
| CN111070735B (en) * | 2019-12-30 | 2021-07-16 | 扬州大学 | Preparation and application method of prestressed shape memory alloy-continuous fiber composite bar |
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| KR20050029730A (en) * | 2003-09-22 | 2005-03-28 | (주)엠프로 | Fiber and steel composite rod for reinforcement of concrete and how to make it |
| CN101139177A (en) * | 2007-08-16 | 2008-03-12 | 同济大学 | Extra-fine steel wire distributed fibre plastic bar and method for making same |
| CN203080803U (en) * | 2012-12-25 | 2013-07-24 | 淮南市金德实业有限公司 | Re-processable composite rib |
| WO2016130326A1 (en) * | 2015-02-10 | 2016-08-18 | University Of Houston System | Self-stressing shape memory alloy-fiber reinforced polymer patch |
-
2016
- 2016-12-15 CN CN201611158952.1A patent/CN106481026B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050029730A (en) * | 2003-09-22 | 2005-03-28 | (주)엠프로 | Fiber and steel composite rod for reinforcement of concrete and how to make it |
| CN101139177A (en) * | 2007-08-16 | 2008-03-12 | 同济大学 | Extra-fine steel wire distributed fibre plastic bar and method for making same |
| CN203080803U (en) * | 2012-12-25 | 2013-07-24 | 淮南市金德实业有限公司 | Re-processable composite rib |
| WO2016130326A1 (en) * | 2015-02-10 | 2016-08-18 | University Of Houston System | Self-stressing shape memory alloy-fiber reinforced polymer patch |
Non-Patent Citations (1)
| Title |
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| Superelastic SMA-FRP composite reinforcement for concrete structures;Nicholas Wierschem and Bassem Andrawes;《Smart Mater. Struct.》;20100114;第2页左栏第5行-第3页右栏第17行，第5页5.Parametric study，第12页7.Conclusions，附图1 |
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