CN103104067B - 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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- CN103104067B CN103104067B CN201310028304.4A CN201310028304A CN103104067B CN 103104067 B CN103104067 B CN 103104067B CN 201310028304 A CN201310028304 A CN 201310028304A CN 103104067 B CN103104067 B CN 103104067B
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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 technical field of transportation, relate to a kind of FRP section bar connected node and method.
Background technology
Civil engineering traffic FRP section bar take epoxy resin as matrix, with non-twist fiber for reinforcing material, add particular/special requirement auxiliary agent, through the different size section bar that pultrusion molding process is made simultaneously, it has specific strength, specific stiffness is high, corrosion-resistant, fatigue performance is good and the feature such as designability.
At 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 the Hybrid connections of the two.Aviation field section bar used is layer paving section bar, and layer paving section bar can according to specifically stressed by multi-direction for fiber laying, to realize the most favourable stressed connection.But civil engineering field of traffic section bar used mainly drawing and extruding section bar, drawing and extruding section bar machine direction is mainly along profile length direction, and the joint efficiency of this kind of section bar bolt connecting mode is lower than 30%, and section bar takes off destruction by cutting of the section bar that mostly occurs after bolt compresses.On the other hand, because the FRP profile plate face of civil engineering field of traffic is thicker, according to cementing connected mode, for ensureing enough joint efficiencies, required lap length is comparatively large, and because construction problem can not realize enough lap length in more situation.Due to the jointly stressed of two kinds of connected modes can not be realized, cementingly can not to effectively improve with the joint efficiency of mechanical mixture connected node.
To sum up, there is the shortcomings such as joint efficiency is low, quality cannot ensure in the node connection of current civil engineering field of traffic FRP profile applications, far can not meet requirement of engineering, this also becomes the bottleneck that FRP section bar is applied at civil engineering field of traffic.
Therefore, need a kind of new FRP section bar connected node to solve the problem.
Summary of the invention
Goal of the invention: the defect that the present invention is directed to FRP section bar connected node in prior art, the FRP section bar connected node providing a kind of bonding strength high.
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 pieces, the lap segment of two blocks of described FRP section bars is provided with colligation groove, the staggered overlap joint of lap segment of two blocks of described FRP section bars is arranged, epoxy resin impregnated glue-line is provided with between the lap segment 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 impregnated of 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 lap segment 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 polishing off lap segment is formed, and answers attentional manipulation grinding depth, be advisable with 0.5mm ± 0.1mm during polishing.
Further, described non-twist fiber comprises the fibre bundle or silvalin that are 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), colligation groove is processed in the lap segment of two blocks of FRP section bars;
2), the staggered overlap joint of the lap segment of two blocks of FRP section bars arranges, and the colligation groove of two blocks of FRP section bars is mutually corresponding, and utilizes epoxy resin impregnated glue the lap segment of two blocks of FRP section bars to be bonded together;
3) non-twist fiber, is utilized to be bundled into together by the lapping plate of colligation groove both sides.
Further, non-twist fiber described in step 3) is the non-twist fiber that impregnated of epoxy resin impregnated glue.
Further, described non-twist fiber comprises the fibre bundle or silvalin that are made by aramid fiber, basalt fibre or glass fiber.
Beneficial effect: non-twist fiber is incorporated into glue-line shearing resistance interface by FRP section bar connected node of the present invention and method, substantially increases the shear strength at glue-line interface, achieves cementing jointly stressed with fiber colligation; The existence of the non-twist fiber of colligation greatly limit the development of glue-line splitting normal stress, prevents glue-line when shear stress is lower, destroys because splitting normal stress is excessive; Have that intensity is high, ductility good, 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 the advantages such as corrosion-resistant, endurance and good air stability.
Accompanying drawing explanation
Fig. 1 is the top view of FRP section bar of the present invention;
Fig. 2 is the top view being provided with the FRP section bar of colligation groove of the present invention;
Fig. 3 is that lap segment of the present invention is interlocked the top view of FRP section bar connected node that overlap joint arranges;
Fig. 4 is that lap segment of the present invention is interlocked the front view of FRP section bar connected node that overlap joint arranges;
Fig. 5 is the top view being wound with the FRP section bar connected node of non-twist fiber of the present invention;
Fig. 6 is the front view being 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.
Detailed description of the invention
According to following embodiment, the present invention may be better understood.But those skilled in the art will readily understand, the content described by embodiment only for illustration of the present invention, and should can not limit the present invention described in detail in claims yet.
Refer to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, FRP section bar connected node of the present invention, the quantity of FRP section bar 1 is two pieces.Wherein, FRP section bar 1 is FRP profile plate, FRP angle steel, FRP U-steel or FRP i iron.The lap segment 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, FRP section bar, comprises the section components that all are made by FRP, as FRP profile plate, and FRP angle steel, FRP U-steel, FRP i iron etc.FRP(Fiber Reinforced Polymer, is called for short FRP), being fibre reinforced composites, is mixed according to a certain percentage by fibrous material and matrix material and the high performance material formed through certain process combining.Colligation groove refer to opened on FRP section bar by special grooving tool penetrate monoblock profile plate, and number is not less than the rectangular slot of 1.
The staggered overlap joint of lap segment of two blocks of FRP section bars 1 is arranged, and is provided with epoxy resin impregnated glue-line 2 between the lap segment 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 impregnated of the non-twist fiber 3 of epoxy resin impregnated glue.The lap segment 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 polishing off lap segment is formed, and answers attentional manipulation grinding depth, be advisable with 0.5mm ± 0.1mm during polishing.Wherein, non-twist fiber comprises the fibre bundle or silvalin that are 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), first the nonskid coating of the lap segment of two blocks of FRP section bars is polished off, then process colligation groove in the lap segment of two blocks of FRP section bars;
2), the staggered overlap joint of the lap segment of two blocks of FRP section bars arranges, and the colligation groove of two blocks of FRP section bars is mutually corresponding, and utilizes epoxy resin impregnated glue the lap segment of two blocks of FRP section bars to be bonded together;
3) non-twist fiber, is utilized to be bundled into together by the lapping plate of colligation groove both sides.Non-twist fiber is the non-twist fiber that impregnated of epoxy resin impregnated glue.
embodiment 1
FRP section bar of the present invention method of attachment, specifically comprises the following steps:
First, use sander to be polished off by section bar 1 lap segment nonskid coating, answer attentional manipulation grinding depth during polishing, be advisable with 0.5mm ± 0.1mm.
Secondly, by colligation groove 4 position and sizing calibration in section bar 1 lap segment, on the colligation groove 4 demarcated, hole is got with puncher, then colligation groove 4 is processed with sweep-saw or hand saws, polish the chamfering of radius 3mm ± 0.5mm afterwards with wood file at trough rim, be beneficial to the stressed of non-twist fiber 4.
3rd, epoxy resin impregnated glue is spread upon section bar lap position, two blocks of FRP section bars are bonded together.
4th, according to manual winding, non-twist fiber 3 must be put in epoxy resin impregnated glue and be not less than for 60 seconds, non-twist fiber 3 is fully flooded, winding process was completed before epoxy resin impregnated gelling is solid, under the prerequisite meeting winding process demand, the not segmentation as far as possible of non-twist fiber 3; Be wound around according to winding machine, be often wound around one deck, fully must smear epoxy resin impregnated glue and twined non-twist fiber 3 is fully flooded.
Finally, node is placed in ventilation consolidation and sclerosis.
Compared with prior art, advantage of the present invention and effect are:
(1) with maximum not being both of Conventional attachment methods, fiber is successfully incorporated into glue-line shearing resistance interface by this kind of FRP section bar connected node, substantially increases the shear strength at glue-line interface, achieves cementing jointly stressed with fiber colligation.
(2) on the other hand, the existence of colligation fiber greatly limit the development of glue-line splitting normal stress, prevents glue-line when shear stress is lower, destroys because splitting normal stress is excessive.
(3) project team's proving test verified this kind of FRP section bar connected node in early stage has that intensity is high, ductility good, joint efficiency advantages of higher.Refer to shown in Fig. 7, 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 only providing 6t, cementing connection provides the bearing capacity of 6.5t, and transmission efficiency is less than 16%.Specifically refer to accompanying drawing 7.
(4) basic comprising of this kind of FRP section bar connected node material therefor and FRP section bar is close, connects closely and has the advantages such as corrosion-resistant, endurance and good air stability.
Claims (8)
1. a FRP section bar connected node, the quantity of described FRP section bar is two pieces, it is characterized in that: the lap segment of two blocks of described FRP section bars is provided with colligation groove, the staggered overlap joint of lap segment of two blocks of described FRP section bars is arranged, epoxy resin impregnated glue-line is provided with between the lap segment of two blocks of described FRP section bars, the colligation groove of two blocks of described FRP section bars is mutually corresponding, the lapping plate of the both sides of described colligation groove is wound with non-twist fiber, the trough rim of described colligation groove is provided with the rounded corner that radius is 3mm ± 0.5mm, and the lap segment of described FRP section bar is provided with recess.
2. FRP section bar connected node as claimed in claim 1, it is characterized in that, described non-twist fiber is the non-twist fiber that impregnated of epoxy resin impregnated glue.
3. FRP section bar connected node as claimed in claim 1, it 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, it 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, described non-twist fiber comprises the fibre bundle or silvalin that are made by aramid fiber, basalt fibre or glass fiber.
6. the method for attachment of FRP section bar, is characterized in that, comprises the following steps:
1), colligation groove is processed in the lap segment of two blocks of FRP section bars;
2), the staggered overlap joint of the lap segment of two blocks of FRP section bars arranges, and the colligation groove of two blocks of FRP section bars is mutually corresponding, and utilizes epoxy resin impregnated glue the lap segment of two blocks of FRP section bars to be bonded together;
3) non-twist fiber, is utilized to be bundled into together by the lapping plate of colligation groove both sides.
7. FRP section bar method of attachment as claimed in claim 6, is characterized in that, step 3) described in non-twist fiber be the non-twist fiber that impregnated of epoxy resin impregnated glue.
8. FRP section bar method of attachment as claimed in claim 6, is characterized in that, step 3) described in non-twist fiber comprise the fibre bundle or silvalin that are 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 true CN103104067B (en) | 2015-06-03 |
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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 |
| CN107718580B (en) * | 2017-11-23 | 2023-09-22 | 荆门展翔文化用品有限公司 | Case and bag steel wire skeleton pipe wrapping machine |
| 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 |
| 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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| JPS63275687A (en) * | 1987-05-07 | 1988-11-14 | Mitsubishi Heavy Ind Ltd | Method of bonding fiber-reinforced plastic to metallic material |
| CN2525123Y (en) * | 2001-12-30 | 2002-12-11 | 李兰英 | Water permeable plate |
| JP2010234524A (en) * | 2009-03-30 | 2010-10-21 | Taisei Plas Co Ltd | Fiber-reinforced plastic joining body and method for producing the same |
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