CN104772798B - Pre-stress FRP strengthens bamboo-wood structure integrated timber and its manufacture method - Google Patents
Pre-stress FRP strengthens bamboo-wood structure integrated timber and its manufacture method Download PDFInfo
- Publication number
- CN104772798B CN104772798B CN201510163463.4A CN201510163463A CN104772798B CN 104772798 B CN104772798 B CN 104772798B CN 201510163463 A CN201510163463 A CN 201510163463A CN 104772798 B CN104772798 B CN 104772798B
- Authority
- CN
- China
- Prior art keywords
- frp
- bamboo
- layer
- layers
- wood
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
Abstract
The invention discloses a kind of pre-stress FRP enhancing bamboo-wood structure integrated timber and its manufacture method, the material to include：Lumber layer (1), FRP layers (2) and bamboo wood layer (3)；FRP layers (2) are using the FRP for being applied with stretch-draw prestressing force；It is bonded together by the order of lumber layer (1), bamboo wood layer (3), FRP layers (2), bamboo wood layer (3), lumber layer (1), and the end of lumber layer (1) is fixed at the both ends of FRP layers (2) by anchor.The manufacture method includes：Timber pretreatment process, bamboo particle pretreatment process and FRP pretreatment process are carried out respectively, and carries out bonding superposition by said sequence, then is respectively mounted anchor at the both ends of FRP layers (2), so as to form pre-stress FRP enhancing bamboo-wood structure integrated timber.The embodiment of the present invention can not only make FRP enhancing bamboo-wood structures be increased dramatically with the bending strength of integrated timber, and the ratio of strength to weight is high, durability is strong, save high-quality timber, cost-effective, manufacture method is simple.
Description
Technical field
The present invention relates to engineered composite material field, more particularly to a kind of pre-stress FRP enhancing bamboo-wood structure integrated timber
And its manufacture method.
Background technology
FRP is Fiber-reinforced polymer abbreviation, and Chinese is fibre reinforced composites, it be with
Fiber is reinforcing material, the composite using resin as matrix, has the characteristics of high intensity, low-density.FRP enhancing structures collect
Become a useful person is to strengthen the advanced engineering fuzzy sets that timber obtains superior performance using FRP as reinforcer.FRP tension
Intensity is 10 times of timber or so, therefore FRP enhancing structures integrated timber can make up timber defect itself, make the whole of integrated timber
Body physical mechanics intensity is improved.But prestressed FRP in the prior art, is not applied to the humidification of integrated timber also not
It is it is obvious that compared with simple timber, bending strength can only be made to lift 20%~40%；If the prestressing force applied on FRP
Reach the 20%~30% of FRP ultimate strengths, then the bending strength of compound rear integrated timber can lift 50%~60%；However, apply
Prestressed FRP has been added to produce larger shear stress when shrinking, once the prestressing force applied on FRP is more than the FRP limit
The 20%~30% of intensity, then after integrated timber is combined into, shear stress will make glue-line caused by the contraction of pre-stress FRP
Or wood shear destroys, therefore the prestressing force applied at present on FRP can only achieve the 20%~30% of FRP ultimate strengths, and this is aobvious
So the higher tensile property advantages of FRP have not been given play to well.
The content of the invention
For above-mentioned weak point of the prior art, the invention provides a kind of pre-stress FRP enhancing bamboo-wood structure to use
Integrated timber and its manufacture method, can be in the case where not destroying glue-line or timber, and the prestressing force for making to apply on FRP reaches FRP
The 50%~60% of ultimate strength, and the bending strength of compound rear structural glulam is lifted more than 1 times, while the prestressing force
FRP, which strengthens bamboo-wood structure, also has strong ratio of strength to weight height, durability, the high-quality timber of saving, cost-effective, manufacture method with integrated timber
The advantages that simple.
The purpose of the present invention is achieved through the following technical solutions：
A kind of pre-stress FRP strengthens bamboo-wood structure integrated timber, including：Lumber layer 1, FRP layers 2 and bamboo wood layer 3；FRP layers 2
Using the FRP for being applied with stretch-draw prestressing force；Lumber layer 1, FRP layers 2 and bamboo wood layer 3 are according to lumber layer 1, bamboo wood layer 3, FRP
Layer 2, bamboo wood layer 3, the order of lumber layer 1 are bonded together；The both ends of FRP layers 2 are equipped with anchor, and the two of FRP layers 2
The end of lumber layer 1 is fixed at end by anchor.
Preferably, described anchor includes fixture block 4 and wedge 5；Fixture block 4 is provided with axially pre- with FRP tensioning
The parallel trapezoidal hole 41 of stress direction, and the small-bore opening of the trapezoidal hole 41 faces FRP layers 2, and FRP layers 2
End in the trapezoidal hole 41 by passing through；
Two wedges 5 respectively out of, the trapezoidal hole 41 is wedged in the both sides up and down of FRP layers 2 large aperture opening, and with
The large aperture opening interference fit of the trapezoidal hole 41, so that the end of FRP layers 2 is clamped by the two wedges 5；Fixture block 4
The small-bore opening side of upper trapezoid through hole 41 is against the end of lumber layer 1, passes through the He of fixture block 4 so as to the end of FRP layers 2
Wedge 5 is fixed on the end of lumber layer 1.
Preferably, the cross section of described trapezoidal hole 41 is isosceles trapezoid, and the inwall of the trapezoidal hole 41 with it is small
Angle α between the section of aperture openings is 90~96 °.
Preferably, in FRP layers 2, the size of the stretch-draw prestressing force applied on FRP be FRP ultimate tensile strengths 0%~
80%.
A kind of manufacture method of pre-stress FRP enhancing bamboo-wood structure integrated timber, including following process：
Timber pretreatment process：Processing of scraping is carried out to wood surface；
Bamboo particle pretreatment process：Sanding processing is carried out to bamboo material surface；
FRP pretreatment process：Sanding processing is carried out to FRP surfaces, and tensioning is applied to the FRP after sanding processing and in advance should
Power；
Compound working procedure：Using the timber after processing of scraping as lumber layer 1, the FRP to be applied with stretch-draw prestressing force is used as FRP
Layer 2, the bamboo wood after being handled using sanding is used as bamboo wood layer 3；By lumber layer 1, FRP layers 2 and bamboo wood layer 3 according to lumber layer 1, bamboo wood layer
3rd, FRP layers 2, bamboo wood layer 3, the order of lumber layer 1 carry out bonding superposition, and are respectively mounted anchor at the both ends of FRP layers 2, make
The end of lumber layer 1 is fixed at the both ends of FRP layers 2 by anchor, is used so as to form pre-stress FRP enhancing bamboo-wood structure
Integrated timber.
Preferably, described FRP pretreatment process includes：Sanding processing first is carried out to FRP surfaces, then sanding handled
FRP surfaces afterwards carry out plasma treatment, then apply stretch-draw prestressing force to FRP；Wherein, the size of stretch-draw prestressing force is FRP poles
Limit the 0%~80% of tensile strength.
Preferably, described bamboo particle pretreatment process includes：Sanding processing is first carried out to bamboo material surface, then is handled in sanding
Bamboo material surface coated with coupling agent afterwards, and bamboo wood layer 3 is used as using bamboo wood of the surface coated with coupling agent.
Preferably, described compound working procedure includes：By lumber layer 1, FRP layers 2 and bamboo wood layer 3 according to lumber layer 1, bamboo wood layer
3rd, FRP layers 2, bamboo wood layer 3, the order of lumber layer 1 carry out bonding superposition, and are respectively mounted anchor at the both ends of FRP layers 2, make
The end of lumber layer 1 is fixed at the both ends of FRP layers 2 by anchor, so as to form integrated timber assembly；Again to integrated timber group
Base carries out compression set, and pressurize 10~240 minutes, so as to form pre-stress FRP enhancing bamboo-wood structure integrated timber.
Preferably, it is 1MPa~4MPa to pressure used in integrated timber assembly compression set.
As seen from the above technical solution provided by the invention, the pre-stress FRP enhancing that the embodiment of the present invention is provided
Bamboo-wood structure integrated timber is then compound with lumber layer 1 by applying stretch-draw prestressing force to FRP, so as to obtain mechanical strength
The pre-stress FRP enhancing structure integrated timber significantly improved；Because pre-stress FRP can produce shearing strength between layers when shrinking, compared with
Big shearing strength between layers can cause failure by shear to timber or glue-line, therefore bamboo wood layer 3 is set between lumber layer 1 and FRP layers 2
As transition zone, and the both ends of FRP layers 2 is fixed on the end of lumber layer 1 by anchor, pre-stress FRP can be made to exist
Shearing strength between layers caused by contraction can be converted into the pressure to the both ends of lumber layer 1, so as to avoid the shearing to timber from breaking
It is bad, pre-stress FRP is really effectively played a role, improve the bending strength of integrated timber.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the structural representation that pre-stress FRP provided by the present invention strengthens bamboo-wood structure integrated timber.
Fig. 2 is the structural representation one of the fixture block 4 of anchor provided by the present invention.
Fig. 3 is the structural representation two of the fixture block 4 of anchor provided by the present invention.
Fig. 4 is the structural representation of the wedge 5 of anchor provided by the present invention.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this
The embodiment of invention, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to protection scope of the present invention.
The pre-stress FRP enhancing bamboo-wood structure integrated timber provided separately below the embodiment of the present invention and its manufacturer
Method is described in detail.
(1) pre-stress FRP enhancing bamboo-wood structure integrated timber
As shown in Figures 1 to 4, a kind of pre-stress FRP enhancing bamboo-wood structure integrated timber, its concrete structure can include：
Lumber layer 1, FRP layers 2 and bamboo wood layer 3；FRP layers 2 are using the FRP for being applied with stretch-draw prestressing force；
Lumber layer 1, FRP layers 2 and bamboo wood layer 3 according to lumber layer 1, bamboo wood layer 3, FRP layers 2, bamboo wood layer 3, lumber layer 1 it is suitable
Sequence is bonded together；The both ends of FRP layers 2 are equipped with anchor, and the both ends of FRP layers 2 are fixed on by anchor
The end of lumber layer 1.
Specifically, the specific embodiment of pre-stress FRP enhancing bamboo-wood structure integrated timber can also include：
(1) resin matrix in FRP can be vinylester based resin, epoxy resin, phenolic resin, resorcinol-phenol
One kind or multiclass in resin or polyurethane resin；Reinforcing fiber in FRP can be aramid fiber, carbon fiber, glass fibre,
One or more in basalt fibre.Inventors herein have recognized that：In existing FRP enhancing structures integrated timber, FRP pairs
The enhancing of lumber layer 1 can not play preferable enhancing effect completely, and the FRP for being applied with stretch-draw prestressing force and lumber layer 1 are answered
Close, the pre-stress FRP enhancing structure integrated timber that mechanical strength significantly improves can be obtained.In actual applications, apply on FRP
The size of stretch-draw prestressing force be the 0%~80% of FRP ultimate tensile strengths.
(2) adhesive used in bonding can select polyurethane, resorcinol, epoxy resin, isocyanide in the prior art
One or more in acid esters or phenolic resin.
(3) bamboo wood layer 3 is preferably process by bamboo wood (preferably from mao bamboon)；Inventors herein have recognized that：Work as timber
After layer 1 is combined into pre-stress FRP enhancing structure integrated timber with the FRP for being applied with stretch-draw prestressing force, pre-stress FRP can shrink,
Pre-stress FRP can produce shearing strength between layers when shrinking, and the prestressing force applied is bigger, shearing strength between layers caused by contraction
Also it is bigger；When in the range of this shearing strength between layers can be born in lumber layer 1, to the big of the FRP stretch-draw prestressing forces applied
The bending strength of material is into positive correlation after small and compound, but this shearing force that lumber layer 1 can be born is very limited；When right
The prestressing force that FRP applies is excessive, during the scope for enabling shearing strength between layers to bear beyond lumber layer 1, against the plank of FRP bondings
Or glue-line easily is caused to cleave by the destruction of shearing force；Therefore bamboo wood layer 3 is preferably provided between lumber layer 1 and FRP layers 2,
The protective effect to timber can be played, prevents timber inter-laminar shear failure.
(4) end of lumber layer 1 is preferably fixed at the both ends of FRP layers 2 by anchor, is receiving pre-stress FRP
The shearing force of glue-line and lumber layer is changed into by timber both ends support stress during contracting.Anchor can use in the prior art
Anchor (such as：Screw), following anchors can also be used：As shown in Figure 2 to Figure 3, the anchor can wrap
Include fixture block 4 and wedge 5；Fixture block 4 is provided with trapezoidal hole 41 axially parallel with FRP stretch-draw prestressing force direction, and should
The small-bore opening of trapezoidal hole 41 faces FRP layers 2, and the end of FRP layers 2 in the trapezoidal hole 41 by passing through；Two wedges
Shape block 5 respectively out of, the trapezoidal hole 41 is wedged in the both sides up and down of FRP layers 2 large aperture opening, and with the trapezoidal hole 41
Large aperture opening interference fit, so that the end of FRP layers 2 is clamped by the two wedges 5；The upper trapezoid through hole 41 of fixture block 4
Small-bore opening side is against the end of lumber layer 1, is fixed on so as to the end of FRP layers 2 by fixture block 4 and wedge 5
The end of lumber layer 1.In actual applications, as shown in Fig. 2 the cross section of trapezoidal hole 41 is isosceles trapezoid, and this is trapezoidal
Angle α between the inwall of through hole 41 and the section of small-bore opening is 90~96 °, thus the inwall of the trapezoidal hole 41 with it is big
Angle β=180 °-α (i.e. 84~90 °) between the section of aperture openings；As shown in figure 4, in order that wedge 5 can be more preferable
The large aperture opening of ground and trapezoidal hole 41 is interference fitted, the angle theta between the inclined-plane and large end face of wedge 5 preferably with β phases
Deng.
When lumber layer 1 and the FRP for being applied with stretch-draw prestressing force are combined into pre-stress FRP enhancing bamboo-wood structure integrated timber
Afterwards, pre-stress FRP can produce shearing strength between layers because of contraction, because the both ends of FRP layers 2 can be fixed on timber by anchor
The end of layer 1, therefore shearing strength between layers can be converted into the pressure to the both ends of lumber layer 1, and the parallel-to-grain compressive strength of timber is anti-
Cut intensity 3~10 times, this can effectively be avoided the failure by shear to lumber layer 1, pre-stress FRP is really effectively played
Effect, improve the bending strength of pre-stress FRP enhancing bamboo-wood structure integrated timber.
(5) through actual verification, if pre-stress FRP strengthens bamboo-wood structure and uses this structure of the application with integrated timber, when
When the stretch-draw prestressing force applied on FRP is the 50% of FRP ultimate tensile strengths, the pre-stress FRP obtained after compound strengthens bamboo and wood
The bending strength of structural glulam can improve more than 1 times.
Further, the concrete principle of pre-stress FRP enhancing bamboo-wood structure integrated timber is as follows：Tensioning is applied to FRP
Prestressing force, and the FRP and lumber layer 1 that are applied with stretch-draw prestressing force is compound, can obtain that mechanical strength significantly improves it is pre- should
Power FRP strengthens bamboo-wood structure integrated timber；Because pre-stress FRP can produce shearing strength between layers when shrinking, larger interlayer is cut
Shear force can cause failure by shear to timber or glue-line, therefore set bamboo wood layer 3 to be used as transition between lumber layer 1 and FRP layers 2
Layer, and the both ends of FRP layers 2 is fixed on the end of lumber layer 1 by anchor, pre-stress FRP can be made to be produced when shrinking
Raw shearing strength between layers can be converted into the pressure to the both ends of lumber layer 1, so as to avoid the failure by shear to timber, make pre- answer
Power FRP really can effectively play a role, and improve the bending strength of integrated timber.
As can be seen here, the embodiment of the present invention can in the case where not destroying glue-line or timber, make to apply on FRP it is pre- should
Power reaches the 50%~60% of FRP ultimate strengths, and the bending strength of compound rear integrated timber is lifted more than 1 times, while this is pre-
Stress FRP enhancing bamboo-wood structures also have the advantages that the ratio of strength to weight is high, durability is strong, cost-effective with integrated timber, thus this pre- is answered
Power FRP enhancing bamboo-wood structure integrated timbers can expand the application of inferior grade timber significantly, reduce to high-quality timber according to
Rely, reduce the cross-sectional area of structural glulam, save timber, expand the application of wood materials.
(2) manufacture method of pre-stress FRP enhancing bamboo-wood structure integrated timber
A kind of manufacture method of pre-stress FRP enhancing bamboo-wood structure integrated timber, can include following process：
Timber pretreatment process：Processing of scraping is carried out to wood surface.
Bamboo particle pretreatment process：Sanding processing is carried out to bamboo material surface；In actual applications, preferably first bamboo material surface is entered
Row sanding is handled, then (coupling agent can be coupling of the prior art to the bamboo material surface coated with coupling agent after sanding processing
Agent, such as:KH550 coupling agents etc.), and bamboo wood layer 3 is used as using bamboo wood of the surface coated with coupling agent.
FRP pretreatment process：Sanding processing is carried out to FRP surfaces, and tensioning is applied to the FRP after sanding processing and in advance should
Power.Specifically, sanding processing first being carried out to FRP surfaces, the FRP surfaces after then handling sanding carry out plasma treatment, then
Stretch-draw prestressing force is applied to FRP；The size of stretch-draw prestressing force is the 0%~80% of FRP ultimate tensile strengths.
Compound working procedure：Using the timber after processing of scraping as lumber layer 1, the FRP to be applied with stretch-draw prestressing force is used as FRP
Layer 2, the bamboo wood after being handled using sanding are used as bamboo wood layer 3 (being preferably used as bamboo wood layer 3 using bamboo wood of the surface coated with coupling agent)；
Lumber layer 1, FRP layers 2 and bamboo wood layer 3 are carried out according to the order of lumber layer 1, bamboo wood layer 3, FRP layers 2, bamboo wood layer 3, lumber layer 1
Bonding superposition, and anchor is respectively mounted at the both ends of FRP layers 2, the both ends of FRP layers 2 is fixed on wood by anchor
The end of material layer 1, so as to form pre-stress FRP enhancing bamboo-wood structure integrated timber.
Specifically, the compound working procedure is preferably：By lumber layer 1, FRP layers 2 and bamboo wood layer 3 according to lumber layer 1, bamboo wood layer 3,
FRP layers 2, bamboo wood layer 3, the order of lumber layer 1 carry out bonding superposition, and are respectively mounted anchor at the both ends of FRP layers 2, make FRP
The end of lumber layer 1 is fixed at the both ends of layer 2 by anchor, so as to form integrated timber assembly；Again to integrated timber assembly
Compression set, and pressurize 10~240 minutes are carried out, so as to form pre-stress FRP enhancing bamboo-wood structure integrated timber.Actually should
It is preferably 1MPa~4MPa to pressure used in integrated timber assembly progress compression set in.
As can be seen here, not only manufacture method is simple for the embodiment of the present invention, and can be made what bending strength was substantially improved
Pre-stress FRP strengthens bamboo-wood structure integrated timber.
In order to more clearly from show technical scheme provided by the present invention and caused technique effect, the application hair
A person of good sense has carried out a series of experiments, and lists existing FRP enhancing structures integrated timber and prestressing force in the application in table 1 below
FRP strengthens the performance comparison situation of bamboo-wood structure integrated timber：
Table 1：
As shown in Table 1：Under the conditions of rational prestressing force size, pre-stress FRP enhancing bamboo-wood structure integrated timber resists
Curved intensity is better than FRP enhancing structures integrated timber of the prior art, and the pre-stress FRP strengthens bamboo-wood structure integrated timber
Cost does not almost increase, and the ratio of strength to weight and cost performance are higher.
As fully visible, the embodiment of the present invention can in the case where not destroying glue-line or timber, make to apply on FRP it is pre- should
Power reaches the 50%~60% of FRP ultimate strengths, and the bending strength of compound rear integrated timber is lifted more than 1 times, while this is pre-
Stress FRP, which strengthens bamboo-wood structure, also has strong ratio of strength to weight height, durability, the high-quality timber of saving, cost-effective, manufacture with integrated timber
The advantages that method is simple.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (7)
1. a kind of pre-stress FRP strengthens bamboo-wood structure integrated timber, it is characterised in that including：Lumber layer (1), FRP layers (2) and
Bamboo wood layer (3)；FRP layers (2) are using the FRP for being applied with stretch-draw prestressing force；
Lumber layer (1), FRP layers (2) and bamboo wood layer (3) according to lumber layer (1), bamboo wood layer (3), FRP layers (2), bamboo wood layer (3),
The order of lumber layer (1) is bonded together；
The both ends of FRP layers (2) are equipped with anchor, and lumber layer is fixed in the both ends of FRP layers (2) by anchor
(1) end；
Described anchor includes fixture block (4) and wedge (5)；Fixture block (4) is provided with the axially stretch-draw prestressing force side with FRP
To parallel trapezoidal hole (41), and the small-bore opening of the trapezoidal hole (41) faces FRP layers (2), and FRP layers (2)
End by being passed through in the trapezoidal hole (41)；It is trapezoidal that two wedges (5) wedge this from the both sides up and down of FRP layers (2) respectively
In the large aperture opening of through hole (41), and it is interference fitted with the large aperture opening of the trapezoidal hole (41), so that FRP layers (2)
End by the two wedges (5) clamp；The small-bore opening side of fixture block (4) upper trapezoid through hole (41) is against timber
The end of layer (1), so as to which the end of FRP layers (2) is fixed on the end of lumber layer (1) by fixture block (4) and wedge (5)；
The cross section of described trapezoidal hole (41) is isosceles trapezoid, and the inwall of the trapezoidal hole (41) and small-bore opening
Section between angle α be 90~96 °；Angle β between the inwall of the trapezoidal hole (41) and the section of large aperture opening
=180 ° of-α；The inclined-plane of wedge (5) and the angle theta between the section of large aperture opening are equal with β.
2. pre-stress FRP according to claim 1 strengthens bamboo-wood structure integrated timber, it is characterised in that in FRP layers (2)
In, the size of the stretch-draw prestressing force applied on FRP is the 0%~80% of FRP ultimate tensile strengths.
A kind of 3. manufacturer of the pre-stress FRP enhancing bamboo-wood structure integrated timber any one of the claims 1 to 2
Method, it is characterised in that including following process：
Timber pretreatment process：Processing of scraping is carried out to wood surface；
Bamboo particle pretreatment process：Sanding processing is carried out to bamboo material surface；
FRP pretreatment process：Sanding processing is carried out to FRP surfaces, and stretch-draw prestressing force is applied to the FRP after sanding processing；
Compound working procedure：Using the timber after processing of scraping as lumber layer (1), the FRP to be applied with stretch-draw prestressing force is used as FRP layers
(2) bamboo wood after, being handled using sanding is used as bamboo wood layer (3)；By lumber layer (1), FRP layers (2) and bamboo wood layer (3) according to lumber layer
(1), bamboo wood layer (3), FRP layers (2), bamboo wood layer (3), the order of lumber layer (1) carry out bonding superposition, and the two of FRP layers (2)
End is respectively mounted anchor, the both ends of FRP layers (2) is fixed on the end of lumber layer (1) by anchor, so as to be formed
Pre-stress FRP strengthens bamboo-wood structure integrated timber.
4. manufacture method according to claim 3, it is characterised in that described FRP pretreatment process includes：
Sanding processing first is carried out to FRP surfaces, the FRP surfaces after then handling sanding carry out plasma treatment, then FRP is applied
Add stretch-draw prestressing force；Wherein, the size of stretch-draw prestressing force is the 0%~80% of FRP ultimate tensile strengths.
5. the manufacture method according to claim 3 or 4, it is characterised in that described bamboo particle pretreatment process includes：It is first right
Bamboo material surface carries out sanding processing, then the bamboo material surface coated with coupling agent after sanding processing, and is coated with coupling agent with surface
Bamboo wood as bamboo wood layer (3).
6. the manufacture method according to claim 3 or 4, it is characterised in that described compound working procedure includes：
By lumber layer (1), FRP layers (2) and bamboo wood layer (3) according to lumber layer (1), bamboo wood layer (3), FRP layers (2), bamboo wood layer
(3), the order of lumber layer (1) carries out bonding superposition, and is respectively mounted anchor at the both ends of FRP layers (2), makes FRP layers (2)
The end of lumber layer (1) is fixed at both ends by anchor, so as to form integrated timber assembly；Integrated timber assembly is carried out again
Compression set, and pressurize 10~240 minutes, so as to form pre-stress FRP enhancing bamboo-wood structure integrated timber.
7. manufacture method according to claim 6, it is characterised in that to pressure used in integrated timber assembly compression set
For 1MPa~4MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510163463.4A CN104772798B (en) | 2015-04-08 | 2015-04-08 | Pre-stress FRP strengthens bamboo-wood structure integrated timber and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510163463.4A CN104772798B (en) | 2015-04-08 | 2015-04-08 | Pre-stress FRP strengthens bamboo-wood structure integrated timber and its manufacture method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104772798A CN104772798A (en) | 2015-07-15 |
| CN104772798B true CN104772798B (en) | 2017-12-15 |
Family
ID=53614720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510163463.4A Expired - Fee Related CN104772798B (en) | 2015-04-08 | 2015-04-08 | Pre-stress FRP strengthens bamboo-wood structure integrated timber and its manufacture method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104772798B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108724402A (en) * | 2018-06-07 | 2018-11-02 | 安徽宏润工艺品有限公司 | A kind of wood preservation treatment process |
| CN109457865A (en) * | 2019-01-08 | 2019-03-12 | 湘潭大学 | A kind of prestressing force bamboo reinforcement UHPC beam and its construction technology |
| GB202020124D0 (en) * | 2020-12-18 | 2021-02-03 | Court Of Edinburgh Napier Univ | Bamboo construction element |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2696939B2 (en) * | 1988-06-21 | 1998-01-14 | 株式会社ピー・エス | Anchoring body for prestressed concrete |
| JPH0438354A (en) * | 1990-06-01 | 1992-02-07 | Kajima Corp | Stretching method for frp rod |
| CN2714680Y (en) * | 2004-08-05 | 2005-08-03 | 中材科技股份有限公司 | Prestressed FRP plate anchoring device |
| CN2818624Y (en) * | 2005-05-31 | 2006-09-20 | 南京工业大学 | Clamping piece solid anchor device of FRP slab |
| CN101722538A (en) * | 2009-11-19 | 2010-06-09 | 东北林业大学 | FRP rib locally reinforced laminated wood and manufacturing process thereof |
| CN102514051A (en) * | 2011-12-21 | 2012-06-27 | 北京林业大学 | Basalt continuous fiber reinforced bamboo-wood composite material and method for manufacturing same |
| CN102926501A (en) * | 2012-10-11 | 2013-02-13 | 南京工业大学 | Reinforced laminate vertically embedded with FRP (Fiber Reinforce Plastic), laminated wood beam and pillar member |
| CN102912965B (en) * | 2012-10-31 | 2015-03-25 | 嘉兴中集木业有限公司 | Fiber-reinforced polymer matrix composite assembled floor |
-
2015
- 2015-04-08 CN CN201510163463.4A patent/CN104772798B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104772798A (en) | 2015-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103061415B (en) | Gluing composite connection joint and gluing composite connection method for FRP (fiber reinforced polymer) section and barbed plates | |
| AU702255B2 (en) | Surface treated synthetic reinforcement for structural wood members | |
| CN104772798B (en) | Pre-stress FRP strengthens bamboo-wood structure integrated timber and its manufacture method | |
| CN104895251A (en) | Wraparound type waveform anchor for fiber sheets and pre-tensioning method thereof | |
| CN208578344U (en) | A kind of intermediate plate type articulated anchor device of fiber reinforced composite board | |
| CN101974959A (en) | Concrete structure FRP end anchor device | |
| CN101144336A (en) | Method for repairing and reinforcing wood beam by carbon fibre bar | |
| CN201254784Y (en) | Bamboo asis multi-component recombinant prestressed beam | |
| CN105756365B (en) | A kind of method of rapid reinforcement beams of concrete | |
| CN105926949B (en) | The tensioning system in situ and method of integral type pre-stress fibre plate reinforcing slab plate | |
| CN103397702B (en) | A kind of composite material connection jiont for net frame point and method | |
| CN204370605U (en) | Steel-wooden buckling restrained brace that a kind of assembling band tapping screw strengthens | |
| CN101885199B (en) | Method for manufacturing bamboo original-state multidirectional recombined pre-stress structural material | |
| CN109944459A (en) | A kind of bracing means and reinforcement means using carbon cloth reinforced non-uniform beam | |
| CN212602393U (en) | Orthogonal glued bamboo wood for building structure | |
| CN105839936B (en) | A kind of stretching and anchoring device and tension anchoring method of pre-stress FRP grid | |
| CN105735666B (en) | A kind of method of rapid reinforcement concrete column | |
| CN105484355A (en) | Connection system of wood-concrete composite structure | |
| CN203440918U (en) | Composite material net rack connection node | |
| CN204023888U (en) | Strand tapered anchorage | |
| CN101725211A (en) | Fiber-reinforced bamboo-based engineering member | |
| CN203270946U (en) | Clamp anchor for protecting soft materials and high-strength sheet clamped by clamp anchor | |
| CN203066245U (en) | Stab plate type glued composite connector used for FRP (fiber reinforced plastic) section | |
| CN206928518U (en) | The renewable hybrid concrete post of fibre reinforced composites cloth constraint | |
| Haller et al. | Use of technical textiles and densified wood for timber joints |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171215 Termination date: 20180408 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |