CN213013922U - Prestress FRP rib capable of being used for clamping piece anchoring - Google Patents
Prestress FRP rib capable of being used for clamping piece anchoring Download PDFInfo
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- CN213013922U CN213013922U CN202020639538.8U CN202020639538U CN213013922U CN 213013922 U CN213013922 U CN 213013922U CN 202020639538 U CN202020639538 U CN 202020639538U CN 213013922 U CN213013922 U CN 213013922U
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- 238000004873 anchoring Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 83
- 239000010959 steel Substances 0.000 claims abstract description 83
- 239000000835 fiber Substances 0.000 claims abstract description 30
- 230000007704 transition Effects 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 239000011159 matrix material Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 10
- 238000007598 dipping method Methods 0.000 claims abstract description 8
- 210000003205 muscle Anatomy 0.000 claims abstract description 8
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 93
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 93
- 239000000463 material Substances 0.000 claims description 27
- 238000004804 winding Methods 0.000 claims description 18
- 239000002131 composite material Substances 0.000 claims description 5
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229920005992 thermoplastic resin Polymers 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 230000000750 progressive effect Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 238000001723 curing Methods 0.000 description 9
- 239000011162 core material Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a prestressed FRP rib which can be used for the anchoring of a clamping piece, comprising a middle FRP section (1), steel cable sections (2) at two ends and a transition section (3) which connects the FRP section (1) and the steel cable sections (2); the FRP section (1) is formed by dipping FRP fiber tows in a resin matrix and heating and curing; the transition section (3) is formed by bonding a steel cable at the end part of the steel cable section (2) and an FRP fiber tow at the end part of the FRP section (1), the steel cable is positioned at the center of the FRP fiber tow, the FRP fiber tow is uniformly bonded around the steel cable along the central axis of the steel cable, and the bonding mode is heating and curing. The utility model discloses a can regard as the prestressed reinforcement to use, carry out the anchor to the steel strand wires or the high-strength steel wire at both ends during the anchor, its mechanical properties has all advantages of FRP muscle to avoided the difficult problem of anchor that the FRP muscle caused because shear strength is low.
Description
Technical Field
The utility model relates to a prestressing force zip technical field, concretely relates to prestressing force FRP muscle that can be used to clamping piece anchor.
Background
At present, plates, bars, cables and the like are widely applied to civil engineering, and in the existing research, the idea of applying FRP materials to large-span and ultra-large-span bridges is not lacked. By utilizing the characteristics of light weight and high strength of the FRP material, the sag effect of the steel cable caused by self weight can be effectively solved, the theoretical limit span of the bridge is greatly improved, and the FRP cable is more suitable for the humid and high-chloride-ion-concentration harmful environments such as river-crossing, sea-crossing and the like.
However, because of the low shear strength of FRP materials (fiber reinforced composite materials), the anchoring thereof has been a bottleneck problem restricting the application thereof in the field of prestressed cables. The existing anchoring systems of FRP inhaul cables can be divided into two categories, namely a mechanical clamping type and a bonding type, from the anchoring force mechanism. The mechanical clamping type anchorage device is similar to a steel strand clamping type anchorage device, the clamping effect is generated by the pressure applied to the FRP rib by the clamping piece, the mechanical clamping type anchorage device has the advantages of flexible design and convenience in construction, the defect is that the clamping piece easily generates concentrated stress in the clamping process to cause the FRP rib damage, the FRP rib is subjected to shearing damage in an anchoring area, and the ideal damage mode is not required to be generated in the anchoring area. The bonding type anchorage device is characterized in that resin or other bonding materials are filled in a sleeve-like device, and shearing force is transmitted through bonding force, friction force and mechanical biting force between the bonding materials and the FRP ropes.
In the prior art, the FRP is generally wrapped on a steel strand or a steel bar in the longitudinal full length mode, the characteristics of high FRP strength, low elastic modulus, light weight and corrosion resistance are utilized to complement the characteristics of low steel strength, high elastic modulus, large weight and non-corrosion resistance, and a corrosion-resistant composite reinforcement material with high strength, high elastic modulus, medium weight and corrosion resistance is formed by a material mixing principle. Therefore, the purpose of the utility model is mainly to solve the defects of low elastic modulus of FRP material and non-corrosion of steel. The mechanical properties of the finished product are the properties of steel and FRP material.
However, the FRP-steel composite rib inner core is made of steel, and is externally wrapped with an FRP material, and when the FRP-steel composite rib inner core is used for a prestressed structure, an anchorage device matched with the FRP material is required, so that the FRP anchoring problem cannot be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel prestressing force FRP muscle that can be used to clamping piece anchor utilizes material miscellaneous principle and bonding principle, with the tip replacement of FRP material for the cable wire section, full play FRP and the respective advantage of steel strand wires compensate the mechanics and the chemical properties defect of material separately, solve the anchor problem of FRP cable.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model provides a prestressing force FRP muscle that can be used to clip anchoring which characterized in that: comprises a middle FRP section, steel cable sections at two ends and a transition section for connecting the FRP section and the steel cable sections; the FRP section is formed by dipping FRP fiber tows in a resin matrix and heating and curing; the transition section is formed by bonding a steel cable at the end part of the steel cable section and an FRP fiber tow at the end part of the FRP section, the steel cable is positioned in the center of the FRP fiber tow, the FRP fiber tow is uniformly bonded around the steel cable along the central axis of the steel cable, and the bonding mode is heating and curing. The proportion of the steel strand and the FRP can be designed according to different use targets.
As the utility model discloses an optimal technical scheme, in the changeover portion, around in the FRP cellosilk from inside to outside layering around the cable wire, adopt progressive bonding overlap joint, the FRP cellosilk layer overlap joint length of inlayer is longer than outer, and the FRP cellosilk overlap joint length that is close to the core promptly is long, and diameter direction is farther away from the core, and overlap joint length is shorter more, can effectively prevent to peel off.
Further, the fiber reinforced plastic composite material can also comprise a winding belt, wherein the winding belt is made of FRP winding wires, FRP winding bundles or FRP winding belts wound outside the transition section, or other matched materials, and the bonding mode is heating curing, so that the peeling is prevented.
The FRP fiber tows are carbon fiber, glass fiber, aramid fiber or basalt fiber material tows.
Further, the resin matrix is a thermoset and thermoplastic resin matrix.
Further, the steel cable section can be a high-strength steel wire or a high-strength steel bar.
Finally, the tensile ultimate bearing capacity of the FRP section rib material is FFRPUltimate bearing capacity F of a steel cable sectionSteelThe ultimate tensile bearing capacity of the transition section is FTThe three satisfy FT＞FSteel＞FFRP。
The utility model discloses a main theory of operation utilizes the bonding property between steel strand wires and the FRP resin base member, passes through the steel strand wires that the transition zone passes through the FRP for the tip, can solve the problem of FRP anchor difficulty. The anchoring of the cable is realized by anchoring high-strength steel wires or steel strands at two ends, and the FRP section and the high-strength steel wires or steel strands are transited through a section of lap joint section. The axial tension of the cable is transmitted by the adhesive force of the overlapping segments. Through the changeover portion, excessively be steel with FRP material, replace FRP material's anchor through the anchor to steel, avoided the anchor problem to the FRP cable completely.
Compared with the prior art, the utility model discloses a technical advantage lies in:
the utility model discloses lie in not carrying out steel and FRP's mixture at muscle material full length, only pass through the transition zone at FRP's tip and pass through FRP and transition for steel strand wires, the utility model discloses the cable has FRP material's whole performance advantage to do not need to anchor FRP and only need anchor steel strand wires material in the tip anchor region.
The utility model discloses the muscle material can be used for materials that prestressed bridge cable etc. need the tip to carry out the anchor.
Drawings
The above and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are given by way of illustration only and not by way of limitation, wherein:
fig. 1 is a schematic structural view of embodiment 1 according to the present invention;
fig. 2 is a schematic structural view of embodiment 2 according to the present invention;
fig. 3 is a schematic structural view of embodiment 3 according to the present invention.
Reference numerals: 1-FRP section, 2-steel cable section, 3-transition section and 4-winding belt.
Detailed Description
Hereinafter, embodiments of the prestressed FRP rib usable for clip anchoring of the present invention will be described with reference to the accompanying drawings. The embodiments described herein are specific embodiments of the present invention, and are intended to be illustrative of the concepts of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the embodiments of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of the respective portions and the mutual relationships thereof. It should be noted that for the sake of clarity in showing the structures of the various components of the embodiments of the present invention, the drawings are not drawn to the same scale. Like reference numerals are used to denote like parts.
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention. Fig. 1 is a schematic structural view of an embodiment 1 of the present invention, a prestressed FRP rib for clip anchoring includes a middle FRP section 1, two steel cable sections 2 at two ends, and a transition section 3 connecting the FRP section 1 and the steel cable section 2; the FRP section 1 is formed by dipping FRP fiber tows 4 in a resin matrix and heating and curing; the transition section 3 is formed by bonding the steel cable at the end part of the steel cable section 2 and the FRP fiber tows at the end part of the FRP section 1, the steel cable is positioned in the center of the FRP fiber tows, the FRP fiber tows are uniformly bonded around the steel cable along the central axis of the steel cable and longitudinally wrapped along the steel strand, and the bonding mode is heating and curing. The proportion of the steel strand and the FRP can be designed according to different use targets. The FRP fiber tows are carbon fiber, glass fiber, aramid fiber or basalt fiber material tows. The resin matrix is a thermoset and thermoplastic resin matrix. The steel cable section 2 is a high-strength steel wire or a high-strength steel bar.
As shown in fig. 2, the structure of the embodiment 2 of the present invention is schematically illustrated, in the transition section 3 of this embodiment, the FRP fibers surrounding the steel cable are arranged in layers from inside to outside, and the FRP fibers are bonded and overlapped progressively, and the overlapping length of the FRP fiber layer of the inner layer is longer than that of the outer layer. That is, the FRP close to the core material is longer in the overlapping length, and the longer the FRP is from the core material in the diameter direction, the shorter the overlapping length is, and peeling is prevented.
Fig. 3 is a schematic structural diagram of embodiment 3 according to the present invention, which includes, in addition to all the structures of embodiment 1, a winding belt 4, where the winding belt 4 is an FRP winding filament, an FRP winding bundle or an FRP winding belt wound outside the transition section 3, or other suitable materials, and the bonding manner is heat curing.
The proportion of the steel strand and the FRP is designed by tensile strength, so that the tensile ultimate bearing capacity F of the FRP section 1 rib materialFRPBelow the limit bearing force F of the cable section 2SteelSuch as equation (1) so that damage does not occur in the strand area.
FFRP＜FSteel (1)
The length of the transition section should be designed by the bonding strength so that the bonding strength is higher than the strength of the steel cord section 2 and the FRP section 1, as in equation (2), so that the damage does not occur in the transition area.
FT＞FSteel＞FFRP (2)
The FRP rib can be manufactured by the following method, and the middle FRP section 1 can adopt a common FRP rib manufacturing process, namely yarn feeding, gum dipping, molding and heating and curing. The method comprises the following specific steps: drawing the FRP raw filament bundle out of a yarn releasing frame; placing a resin matrix in a dipping tank, and fully soaking the drawn FRP raw filament bundle through the dipping tank; thirdly, the fully soaked fiber protofilaments penetrate through a threading plate; fourthly, the fiber protofilaments enter a forming die to be formed after passing through a yarn threading plate; heating and curing the formed FRP rib by heating equipment to form an FRP section 1; sixthly, inserting the steel strand into the middle part of the yarn threading plate after the middle FRP section 1 is manufactured to reach the specified length, winding the FRP tows outside the steel strand, and extruding and molding the FRP tows together through a molding die; seventhly, curing and molding the formed steel strand and a transition section consisting of FRP (fiber reinforced plastic) tows wound outside the steel strand together by heating equipment; cutting off the fiber tow when the transition section 3 reaches the designed length, and stopping feeding the FRP tow; and ninthly, continuously feeding the steel strand until the steel strand is cut off after the steel strand is of the specified length.
And (3) simultaneously feeding the steel strand and the FRP fiber tows subjected to gum dipping into a forming die at the transition section 3, and combining the steel strand at the center of the transition section and the surrounding FRP fiber yarns into a whole through pultrusion and heating curing. And when the length of the transition section is met, the FRP fiber yarns are stopped being fed into the die, the steel strands are continuously fed to reach a certain length, and finally, a winding belt 4 can be additionally arranged on the outermost side.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. The utility model provides a prestressing force FRP muscle that can be used to clip anchoring which characterized in that: comprises a middle FRP section (1), steel cable sections (2) at two ends and a transition section (3) for connecting the FRP section (1) and the steel cable sections (2); the FRP section (1) is formed by dipping FRP fiber tows in a resin matrix and heating and curing; the transition section (3) is formed by bonding a steel cable at the end part of the steel cable section (2) and an FRP fiber tow at the end part of the FRP section (1), the steel cable is positioned at the center of the FRP fiber tow, the FRP fiber tow is uniformly bonded around the steel cable along the central axis of the steel cable, and the bonding mode is heating and curing.
2. The prestressed FRP rib for clip anchoring as claimed in claim 1, wherein: in the transition section (3), the FRP fiber yarns surrounding the steel cable are arranged in a layered mode from inside to outside, progressive bonding overlapping is adopted, and the overlapping length of the FRP fiber yarn layer of the inner layer is longer than that of the outer layer.
3. The prestressed FRP rib for clip anchoring as claimed in claim 1, wherein: the fiber reinforced plastic composite material is characterized by further comprising a winding belt (4), wherein the winding belt (4) is an FRP winding wire, an FRP winding bundle or an FRP winding belt which is wound on the outer side of the transition section (3), and the bonding mode is heating and curing.
4. The prestressed FRP rib for clip anchoring as claimed in claim 1, wherein: the FRP fiber tows are carbon fiber, glass fiber, aramid fiber or basalt fiber material tows.
5. The prestressed FRP rib for clip anchoring as claimed in claim 1, wherein: the resin matrix is a thermoset and thermoplastic resin matrix.
6. The prestressed FRP rib for clip anchoring as claimed in claim 1, wherein: the steel cable section (2) is a high-strength steel wire or a high-strength steel bar.
7. The prestressed FRP rib for clip anchoring as claimed in claim 1, wherein: the tensile ultimate bearing capacity of the FRP section (1) rib material is FFRP,the ultimate bearing capacity FSteel of the steel cable section (2) and the ultimate bearing capacity FT of the transition section (3) satisfy FT＞FSteel＞FFRP。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020639538.8U CN213013922U (en) | 2020-04-24 | 2020-04-24 | Prestress FRP rib capable of being used for clamping piece anchoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020639538.8U CN213013922U (en) | 2020-04-24 | 2020-04-24 | Prestress FRP rib capable of being used for clamping piece anchoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213013922U true CN213013922U (en) | 2021-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020639538.8U Active CN213013922U (en) | 2020-04-24 | 2020-04-24 | Prestress FRP rib capable of being used for clamping piece anchoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213013922U (en) |
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- 2020-04-24 CN CN202020639538.8U patent/CN213013922U/en active Active
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