CN103104067A - FRP (Fiber Reinforce Plastic) profile connecting node and method - Google Patents
FRP (Fiber Reinforce Plastic) profile connecting node and method Download PDFInfo
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- CN103104067A CN103104067A CN2013100283044A CN201310028304A CN103104067A CN 103104067 A CN103104067 A CN 103104067A CN 2013100283044 A CN2013100283044 A CN 2013100283044A CN 201310028304 A CN201310028304 A CN 201310028304A CN 103104067 A CN103104067 A CN 103104067A
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Abstract
The invention discloses an FRP (Fiber Reinforce Plastic) profile connecting node and method. Two FRP profiles are available; lapping segments of the two FRP profiles are both provided with binding grooves; the lapping segments of the two FRP profiles are arranged in alternate lapping manner; an epoxy resin impregnating adhesive layer is arranged between the lapping segments of the two FRP profiles; the binding grooves of the two FRP profiles are corresponding to each other; and untwisted fibers are wound at both sides of the binding grooves. According to the FRP profile connecting node and method, the untwisted fibers are introduced to an adhesive layer shear resisting interface, and thus the shearing strength of the adhesive interface is greatly improved, and the connecting node is under stress through adhesive bonding and fiber binding together; and the bonded untwisted fibers greatly restrict the development of the positive adhesive layer cleavage stress, prevents the adhesive layer from being damaged due to the overlarge positive cleavage stress in case the shearing stress is relatively low. The FRP profile connecting node has the advantages of high strength, good ductility, high join efficiency, and the like. Materials used for the FRP profile connecting node are similar to base composition materials of the FRP profiles, and the connection is tight; and the connecting node has the advantages of corrosion resistance, fatigue resistance, good air stability and the like.
Description
Technical field
The invention belongs to civil engineering traffic technique field, relate to a kind of FRP section bar connected node and method.
Background technology
The civil engineering traffic is take epoxy resin as matrix with the FRP section bar, take non-twist fiber as reinforcing material, add simultaneously the specific (special) requirements auxiliary agent, the different size section bar of making through pultrusion molding process, it has specific strength, specific stiffness is high, and corrosion-resistant, fatigue performance reaches well the characteristics such as designability.
At the civil engineering field of traffic, the application of FRP section bar is started late.At present, the node connected mode of aviation field composite material has been continued to use in the connection of this field FRP section bar substantially: cementing connection, mechanical connection and mixing both connect.Aviation field section bar used is layer paving section bar, and layer paving section bar can be according to concrete stressed with the multi-direction laying of fiber, to realize the most favourable stressed connection.Yet civil engineering field of traffic section bar used is mainly drawing and extruding section bar, and the drawing and extruding section bar machine direction is mainly along the profile length direction, and the joint efficiency of this kind section bar bolt connecting mode is lower than 30%, and the cutting of section bar of mostly occurring after section bar is pushed by bolt taken off destruction.On the other hand, because the FRP profile plate face of civil engineering field of traffic is thicker, if adopt cementing connected mode, for guaranteeing enough joint efficiencies, required lap length is larger, and in more situation because construction problem can not be realized enough lap length.Owing to can not realizing the jointly stressed of two kinds of connected modes, the cementing and joint efficiency mechanical mixture connected node can not effectively improve.
To sum up, there are the shortcomings such as joint efficiency is low, quality can't guarantee in the node of civil engineering field of traffic FRP profile applications connection at present, far can not satisfy requirement of engineering, and this also becomes the bottleneck that the FRP section bar is used at the civil engineering field of traffic.
Therefore, need a kind of new FRP section bar connected node to address the above problem.
Summary of the invention
Goal of the invention: the present invention is directed to the defective of FRP section bar connected node in prior art, provide a kind of bonding strength high FRP section bar connected node.
Technical scheme: for solving the problems of the technologies described above, FRP section bar connected node of the present invention adopts following technical scheme:
A kind of FRP section bar connected node, the quantity of described FRP section bar is two, the overlap joint section of two blocks of described FRP section bars is provided with the colligation groove, the staggered overlap joint of the overlap joint section of two blocks of described FRP section bars arranges, be provided with epoxy resin impregnated glue-line between the overlap joint section of two blocks of described FRP section bars, the colligation groove of two blocks of described FRP section bars is mutually corresponding, and the lapping plate of the both sides of described colligation groove is wound with non-twist fiber.
Further, described non-twist fiber is the non-twist fiber that has flooded epoxy resin impregnated glue.
Further, described FRP section bar is FRP profile plate, FRP angle steel, FRP U-steel or FRP i iron.
Further, described colligation groove is rectangular slot.
Further, the trough rim of described colligation groove is provided with the rounded corner that radius is 3mm ± 0.5mm.Be beneficial to the stressed of non-twist fiber.
Further, the overlap joint section of described FRP section bar is provided with recess.The degree of depth of described recess is 0.5mm ± 0.1mm.Recess is that the nonskid coating that polishes off the overlap joint section forms, and should note controlling grinding depth during polishing, is advisable with 0.5mm ± 0.1mm.
Further, described non-twist fiber comprises fibre bundle or the silvalin of being made by aramid fiber, basalt fibre or glass fiber.
The invention also discloses the method for attachment of a kind of FRP section bar.
The method of attachment of a kind of FRP section bar comprises the following steps:
1), the overlap joint section at two blocks of FRP section bars processes the colligation groove;
2), the staggered overlap joint of the overlap joint section of two blocks of FRP section bars arranges, the colligation groove of two blocks of FRP section bars is mutually corresponding, and utilizes epoxy resin impregnated glue that the overlap joint section of two blocks of FRP section bars is bonded together;
3), utilize non-twist fiber that the lapping plate of colligation groove both sides is bundled into together.
Further, non-twist fiber described in step 3) is the non-twist fiber that has flooded epoxy resin impregnated glue.
Further, described non-twist fiber comprises fibre bundle or the silvalin of being made by aramid fiber, basalt fibre or glass fiber.
Beneficial effect: FRP section bar connected node of the present invention and method are incorporated into glue-line shearing resistance interface with non-twist fiber, have greatly improved the shear strength at glue-line interface, have realized the jointly stressed of cementing and fiber colligation; The existence of the non-twist fiber of colligation has limited the development of glue-line splitting normal stress greatly, prevents glue-line in the situation that shear stress is lower, destroys because splitting normal stress is excessive; Have that intensity is high, ductility good, the joint efficiency advantages of higher; The basic comprising of FRP section bar connected node material therefor and FRP section bar is close, connects closely and has corrosion-resistant, endurance and good advantages such as air stability.
Description of drawings
Fig. 1 is the top view of FRP section bar of the present invention;
Fig. 2 is the top view that is provided with the FRP section bar of colligation groove of the present invention;
Fig. 3 is the top view of the FRP section bar connected node of the staggered overlap joint setting of overlap joint section of the present invention;
Fig. 4 is the front view of the FRP section bar connected node of the staggered overlap joint setting of overlap joint section of the present invention;
Fig. 5 is the top view that is wound with the FRP section bar connected node of non-twist fiber of the present invention;
Fig. 6 is the front view that is wound with the FRP section bar connected node of non-twist fiber of the present invention;
Fig. 7 is that the colligation of FRP section bar is cementing, bolt connects, cementing connection load-displacement curve figure.
The specific embodiment
According to following embodiment, the present invention may be better understood.Yet, those skilled in the art will readily understand, the described content of embodiment only is used for explanation the present invention, and should also can not limit the present invention described in detail in claims.
See also Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, FRP section bar connected node of the present invention, the quantity of FRP section bar 1 is two.Wherein, FRP section bar 1 is FRP profile plate, FRP angle steel, FRP U-steel or FRP i iron.The overlap joint section of two blocks of FRP section bars 1 is provided with colligation groove 4.Colligation groove 4 is rectangular slot.The trough rim of colligation groove 4 is provided with the rounded corner that radius is 3mm ± 0.5mm.Wherein, the FRP section bar comprises the section components that all are made by FRP, as the FRP profile plate, and FRP angle steel, FRP U-steel, FRP i iron etc.FRP(Fiber Reinforced Polymer is called for short FRP), be fibre reinforced composites, be mix according to a certain percentage and pass through the high performance material that certain technique is compounded to form by fibrous material and matrix material.The colligation groove refers to penetrate the monoblock profile plate by what special-purpose grooving tool was opened on the FRP section bar, and number is not less than the rectangular slot of 1.
The staggered overlap joint of the overlap joint section of two blocks of FRP section bars 1 arranges, and is provided with epoxy resin impregnated glue-line 2 between the overlap joint section of two blocks of FRP section bars 1.The colligation groove 4 of two blocks of FRP section bars 1 is mutually corresponding, and the lapping plate of the both sides of colligation groove 4 is wound with non-twist fiber 3.Wherein, non-twist fiber 3 is for having flooded the non-twist fiber 3 of epoxy resin impregnated glue.The overlap joint section of FRP section bar 1 is provided with recess.The degree of depth of recess is 0.5mm ± 0.1mm.Wherein, recess is that the nonskid coating that polishes off the overlap joint section forms, and should note controlling grinding depth during polishing, is advisable with 0.5mm ± 0.1mm.Wherein, non-twist fiber comprises fibre bundle or the silvalin of being made by aramid fiber, basalt fibre or glass fiber.
The invention also discloses the method for attachment of a kind of FRP section bar, comprise the following steps:
1), at first the nonskid coating with the overlap joint section of two blocks of FRP section bars polishes off, then the overlap joint section at two blocks of FRP section bars processes the colligation groove;
2), the staggered overlap joint of the overlap joint section of two blocks of FRP section bars arranges, the colligation groove of two blocks of FRP section bars is mutually corresponding, and utilizes epoxy resin impregnated glue that the overlap joint section of two blocks of FRP section bars is bonded together;
3), utilize non-twist fiber that the lapping plate of colligation groove both sides is bundled into together.Non-twist fiber is the non-twist fiber that has flooded epoxy resin impregnated glue.
FRP section bar of the present invention method of attachment specifically comprises the following steps:
At first, use sander that section bar 1 overlap joint section nonskid coating is polished off, should note controlling grinding depth during polishing, be advisable with 0.5mm ± 0.1mm.
Secondly, colligation groove 4 positions and size are demarcated in section bar 1 overlap joint section, get hole with puncher on the colligation groove 4 of demarcating, then process colligation groove 4 with sweep-saw or hand saws, polish afterwards the chamfering of radius 3mm ± 0.5mm with wood file at trough rim, be beneficial to the stressed of non-twist fiber 4.
The 3rd, epoxy resin impregnated glue is spread upon the section bar lap position, two blocks of FRP section bars are bonded together.
The 4th, if adopt manual the winding, non-twist fiber 3 must be put into and be not less than for 60 seconds in epoxy resin impregnated glue, make non-twist fiber 3 fully be flooded, completed winding process before epoxy resin impregnated gelling is solid, under the prerequisite that satisfies the winding process demand, non-twist fiber 3 not segmentations as far as possible; If adopt winding machine to be wound around, every winding one deck must fully be smeared epoxy resin impregnated glue and make the non-twist fiber 3 that twines fully be flooded.
At last, node is placed in the ventilation consolidation and sclerosis.
Compared with prior art, advantage of the present invention and effect are:
(1) with not being both of traditional method of attachment maximum, this kind FRP section bar connected node successfully is incorporated into fiber glue-line shearing resistance interface, has greatly improved the shear strength at glue-line interface, has realized the jointly stressed of cementing and fiber colligation.
(2) on the other hand, the existence of colligation fiber has limited the development of glue-line splitting normal stress greatly, prevents glue-line in the situation that shear stress is lower, destroys because splitting normal stress is excessive.
(3) verified this kind FRP of proving test in project team early stage section bar connected node has that intensity is high, ductility good, the joint efficiency advantages of higher.See also shown in Figure 7ly, to the profile plate of thickness 10mm, width 85mm, the present invention can provide the bearing capacity up to 23t, joint efficiency reaches 64%, and the bolt of equal lap length connects the bearing capacity that 6t only is provided, and cementing connection provides the bearing capacity of 6.5t, transmission efficiency less than 16%.Specifically see accompanying drawing 7 for details.
(4) basic comprising of this kind FRP section bar connected node material therefor and FRP section bar is close, connects closely and has corrosion-resistant, endurance and good advantages such as air stability.
Claims (10)
1. FRP section bar connected node, the quantity of described FRP section bar is two, it is characterized in that: the overlap joint section of two blocks of described FRP section bars is provided with the colligation groove, the staggered overlap joint of the overlap joint section of two blocks of described FRP section bars arranges, be provided with epoxy resin impregnated glue-line between the overlap joint section of two blocks of described FRP section bars, the colligation groove of two blocks of described FRP section bars is mutually corresponding, and the lapping plate of the both sides of described colligation groove is wound with non-twist fiber.
2. FRP section bar connected node as claimed in claim 1, is characterized in that, described non-twist fiber is the non-twist fiber that has flooded epoxy resin impregnated glue.
3. FRP section bar connected node as claimed in claim 1, is characterized in that, described FRP section bar is FRP profile plate, FRP angle steel, FRP U-steel or FRP i iron.
4. FRP section bar connected node as claimed in claim 1, is characterized in that, described colligation groove is rectangular slot.
5. FRP section bar connected node as claimed in claim 1, is characterized in that, the trough rim of described colligation groove is provided with the rounded corner that radius is 3mm ± 0.5mm.
6. FRP section bar connected node as claimed in claim 1, is characterized in that, the overlap joint section of described FRP section bar is provided with recess.
7. FRP section bar connected node as claimed in claim 1, is characterized in that, described non-twist fiber comprises fibre bundle or the silvalin of being made by aramid fiber, basalt fibre or glass fiber.
8. FRP section bar method of attachment is characterized in that, comprises the following steps:
1), the overlap joint section at two blocks of FRP section bars processes the colligation groove;
2), the staggered overlap joint of the overlap joint section of two blocks of FRP section bars arranges, the colligation groove of two blocks of FRP section bars is mutually corresponding, and utilizes epoxy resin impregnated glue that the overlap joint section of two blocks of FRP section bars is bonded together;
3), utilize non-twist fiber that the lapping plate of colligation groove both sides is bundled into together.
9. FRP section bar as claimed in claim 8 method of attachment is characterized in that, non-twist fiber described in step 3) is the non-twist fiber that has flooded epoxy resin impregnated glue.
10. FRP section bar as claimed in claim 8 method of attachment is characterized in that, non-twist fiber described in step 3) comprises fibre bundle or the silvalin of being made by aramid fiber, basalt fibre or glass fiber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310028304.4A CN103104067B (en) | 2013-01-25 | 2013-01-25 | FRP (Fiber Reinforce Plastic) profile connecting node and method |
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| CN201310028304.4A CN103104067B (en) | 2013-01-25 | 2013-01-25 | FRP (Fiber Reinforce Plastic) profile connecting node and method |
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| CN103104067B CN103104067B (en) | 2015-06-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104563522A (en) * | 2014-11-25 | 2015-04-29 | 中冶建筑研究总院有限公司 | Permanent connection method for FRP (Fiber Reinforced Plastic) rebars |
| CN107718580A (en) * | 2017-11-23 | 2018-02-23 | 荆门展翔文化用品有限公司 | A kind of case and bag steel wire skeleton machine for wrapping |
| CN110607742A (en) * | 2019-09-29 | 2019-12-24 | 广东工业大学 | Corrugated steel web connecting structure |
| CN115214157A (en) * | 2022-06-16 | 2022-10-21 | 北京工业大学 | Node connection method of thermoplastic resin-based composite material pultrusion section bar |
| CN116657761A (en) * | 2023-06-15 | 2023-08-29 | 四川省建筑设计研究院有限公司 | FRP precast beam column node with shearing connectors and construction method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104563522A (en) * | 2014-11-25 | 2015-04-29 | 中冶建筑研究总院有限公司 | Permanent connection method for FRP (Fiber Reinforced Plastic) rebars |
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| CN110607742A (en) * | 2019-09-29 | 2019-12-24 | 广东工业大学 | Corrugated steel web connecting structure |
| CN115214157A (en) * | 2022-06-16 | 2022-10-21 | 北京工业大学 | Node connection method of thermoplastic resin-based composite material pultrusion section bar |
| CN116657761A (en) * | 2023-06-15 | 2023-08-29 | 四川省建筑设计研究院有限公司 | FRP precast beam column node with shearing connectors and construction method thereof |
| CN116657761B (en) * | 2023-06-15 | 2023-11-28 | 四川省建筑设计研究院有限公司 | FRP precast beam column node with shearing connectors and construction method thereof |
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| CN103104067B (en) | 2015-06-03 |
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