CN212375639U - Multi-axial fiber-reinforced pultruded profile sandwich composite spandrel girder - Google Patents
Multi-axial fiber-reinforced pultruded profile sandwich composite spandrel girder Download PDFInfo
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- CN212375639U CN212375639U CN202021832278.2U CN202021832278U CN212375639U CN 212375639 U CN212375639 U CN 212375639U CN 202021832278 U CN202021832278 U CN 202021832278U CN 212375639 U CN212375639 U CN 212375639U
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 7
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
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- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 229920006231 aramid fiber Polymers 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
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Abstract
The utility model discloses a multiaxial fibre reinforcing pultrusion section bar presss from both sides core combined material spandrel girder, include: the composite material comprises a pultruded tube core material, a pultruded tube sealing material, a composite material web and a composite material panel; the core material of the pultrusion tube is a rectangular section, the outer surface of the pultrusion tube is wound with winding fiber cloth, and the pultrusion tube is sealed by a sealing material; the pulling and extruding pipe core materials are arranged in a plurality of numbers, the pulling and extruding pipe core materials are spliced and stacked to form a combined component in the shape of a beam, and the surface of the combined component formed by splicing and stacking the pulling and extruding pipe core materials is externally coated with fiber cloth; the utility model discloses a combined material sandwich structure to the pultruded profile is the core, uses combined material as surface course and web, make full use of pultruded profile and two kinds of advantages of combined material sandwich structure for the component resistance to compression, bending resistance, shear and anti stripping ability are showing to be improved and have been solved the bearing capacity and hang down and the interface stripping problem.
Description
Technical Field
The utility model relates to a combined material field especially relates to a multiaxial fibre reinforcing pultrusion section bar presss from both sides core combined material spandrel girder.
Background
The composite material is widely applied to the field of infrastructure due to the characteristics of light weight and high strength. At present, the concept of a composite material bearing beam is provided for reducing the structural weight of a bridge (particularly a suspension bridge which is particularly sensitive to weight).
Glass fiber reinforced composite (GFRP) is widely applied in the field of infrastructure due to the low price advantage, and a pultrusion cavity type profile is usually adopted, but the pultrusion profile usually mainly comprises longitudinal fibers, a large shearing force and stress concentration phenomenon exists at the joint of a panel and a web, and the fracture damage is easily generated at the middle part of the panel or the intersection of the panel and the web, so that the bearing capacity is low, and the existing pultrusion process is difficult to form a large-size section composite member, so that the GFRP is usually used for an auxiliary structure with low stress.
The sandwich structure of composite material with honeycomb, foam, balsa wood and other core material is one very wide structure for engineering application, and has increased section inertia moment and thus high bending strength and rigidity. However, the interface of the surface layer and the core material is easy to peel and damage during the manufacturing and service processes of the traditional composite material sandwich component, and the light weight and high strength characteristics of the traditional composite material sandwich component are seriously restricted.
The wooden sleeper that erects the rail on present railway bridge exists that the quality descends, anticorrosive treatment is not thorough scheduling problem, leads to its performance and life-span to decline gradually, has restricted the improvement of operation speed, axle load and freight volume, and the utility model discloses just the mainstream product of railway rail sleeper renewal generation in the future. The composite material spandrel girder has the advantages of high strength, corrosion resistance, long service life, good track gauge retention capacity, flexible fastener installation, mechanized and continuous production and the like as a sleeper, has great advantages compared with a wooden sleeper, and has very good application prospect.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a multiaxial fibre reinforcing pultrusion section bar presss from both sides core combined material spandrel girder, the main problem of solving is: in the prior art, the interface of the surface layer and the core material is easy to peel and damage during the manufacturing and service processes of the composite material sandwich component, and the light weight and high strength characteristics of the sandwich component are seriously restricted.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model discloses a multiaxial fibre reinforcing pultrusion section bar presss from both sides core combined material spandrel girder, include: the composite material comprises a pultruded tube core material, a pultruded tube sealing material, a composite material web and a composite material panel; the core material of the pultrusion tube is of a rectangular cross section, the outer surface of the pultrusion tube is wound with winding fiber cloth, and the pultrusion tube is sealed by the sealing material; the pultrusion tube core material is provided with a plurality of pultrusion tube core materials which are spliced to form a combined component in a beam shape, and the mode of splicing and stacking the pultrusion tube core materials is as follows: horizontally splicing and stacking, vertically splicing and stacking, horizontally splicing and stacking a plurality of rows of pultruded tube core materials, and vertically splicing and stacking a plurality of layers of pultruded tube core materials; the surface of the combined component formed by splicing and stacking the plurality of the pultrusion tube core materials is externally coated with externally coated fiber cloth; the outer fiber cloth and resin are solidified into a composite material panel; in the combined member, winding fiber cloth and resin at the joint position of the pultrusion tube core materials which are adjacent up and down and/or adjacent left and right are cured into a composite material web; the composite material webs are arranged along the height direction and/or the length direction of the pultrusion pipe core material to form a spatial lattice web.
Preferably, the sealing material of the pultrusion tube is a composite material sheet or a structural foam block, and the composite material sheet is sealed by gluing; the structural foam blocks are plugged into two ends of the pultrusion tube core material and are fixed for sealing; the composite material panel is wrapped with carbon fiber cloth.
Preferably, the size and the number of the core materials of the pultruded tube can be flexibly adopted according to the actual stress of the structure; the laying direction and the number of layers of the winding fiber cloth can be flexibly controlled according to the requirement; the laying direction and the number of layers of the outer wrapping fiber cloth can be flexibly controlled according to the requirement.
Preferably, the winding fiber cloth and the wrapping fiber cloth are made of the following materials: carbon fiber, glass fiber, aramid fiber or hybrid fiber cloth; the axial direction of the fibers in the winding fiber cloth and the outer wrapping fiber cloth is as follows: uniaxial, biaxial, or multiaxial; and light concrete is filled in the core material of the pultrusion tube.
Preferably, the resin is selected from the following classes of resins: unsaturated polyester, vinyl, epoxy or phenolic resins.
The utility model also discloses a preparation method of multiaxial fibre reinforcing pultrusion section sandwich combined material spandrel girder includes following step:
s1, sealing two ends of the pultrusion tube core material by using the pultrusion tube sealing material;
s2, laying and winding fiber cloth on the outer surface material of the sealed pultrusion tube core; the number of layers and the direction of the wound fiber cloth are as follows: single-layer unidirectional, single-layer bidirectional or multi-layer multidirectional;
s3, splicing and folding the tube core materials in the step S2 to form a combined member in the shape of a beam;
s4, laying one or more layers of fiber cloth outside the combined member;
s5, placing the combined component obtained in the step S4 in a vacuum bag or a mold, and pouring resin into the vacuum bag or the mold through a vacuum bag forming process, a vacuum lead-in forming process or an RTM forming process;
s6, after the resin is cured and molded, taking out the resin, and curing the fiber cloth and the resin to form a composite material panel; and (3) curing the wound fiber cloth and the resin at the joint positions of the core materials of the pultrusion tubes which are adjacent up and down and/or adjacent left and right in the combined component into a composite material web plate, thus obtaining the multi-axial fiber reinforced pultrusion type sandwich composite material bearing beam.
The utility model has the advantages that:
1. the utility model discloses a combined material sandwich structure to combined material pultrusion section bar is the core, uses combined material as surface course and web, make full use of pultrusion section bar and two kinds of advantages of combined material sandwich structure for the component resistance to compression, bending resistance, shear and anti stripping ability are showing to be improved and have been solved the bearing capacity and the interface and peel off the problem, have satisfied actual engineering demand.
2. The utility model provides a pair of multiaxial fibre reinforcing pultrusion section bar presss from both sides core combined material spandrel girder is extensive in railway transportation field application, can replace the wooden pillow on the current rail, the utility model discloses relative and the wooden pillow among the prior art have intensity height, corrosion-resistant, long service life, gauge holding power good, fastener installation flexibility and production mechanization, advantages such as serialization have very good application prospect.
Drawings
FIG. 1 is a schematic structural view of a multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder, wherein core materials of the pultruded pipes are horizontally spliced.
FIG. 2 is a schematic view of a multi-axial fiber reinforced pultruded core composite spandrel girder with core materials of pultruded tubes vertically stacked.
FIG. 3 is a schematic view of a multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder with multiple rows of pultruded tube core materials horizontally spliced.
FIG. 4 is a schematic view of a multi-axial fiber reinforced pultruded core composite spandrel girder with multiple layers of pultruded core materials vertically stacked.
FIG. 5 is a schematic diagram of an engineering application example of a multiaxial fiber reinforced pultruded profile sandwich composite spandrel girder.
FIG. 6 is a cross-sectional view of the multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder of FIG. 5.
FIG. 7 is a schematic view of a fiber lay-up of a multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder.
FIG. 8 is a schematic diagram of the application of the engineering of a multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder to a railroad sleeper.
FIG. 9 is a schematic structural view of a multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder of FIG. 8.
In the drawings: the composite material comprises 1 a pultrusion tube core material, 2 a pultrusion tube sealing material, 3 a winding fiber cloth, 4 an outer wrapping fiber cloth, 5 a composite material web, 6 a composite material panel and 7 a carbon fiber cloth.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1, this embodiment 1 discloses a multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder, which includes: the composite material comprises a pultruded tube core material 1, a pultruded tube sealing material 2, a composite material web 5 and a composite material panel 6; the core material 1 of the pultrusion tube is a rectangular cross section, the size of the core material can be flexibly adopted according to the actual stress of the structure, the outer surface of the core material 1 of the pultrusion tube is wound with the winding fiber cloth 3, and the sealing is carried out by the sealing material 2 of the pultrusion tube; in this embodiment, pultrusion tube sealing material 2 can select for use the combined material sheet to cross the sticky seal, also can select for use the structure foam piece of certain length, packs into the structure foam piece and seals in fixed the both ends of pultrusion tube core 1.
3 pultrusion tube core materials 1 are arranged, in other specific examples, the number can be flexibly adopted according to the actual stress of the structure, the 3 pultrusion tube core materials 1 are horizontally spliced to form a combined member which is in the shape of a beam, and the surface of the combined member formed by splicing the 3 pultrusion tube core materials is coated with an outer-coated fiber cloth 4;
the outer fiber cloth 4 and the resin are solidified into a composite material panel 6; inside the combined member, the winding fiber cloth 3 and resin at the joint position of the pultrusion tube core materials 1 which are adjacent up and down and/or adjacent left and right are solidified into a composite material web 6; in the embodiment 1, the winding fiber cloth 3 and the resin at the joint position of the upper and lower adjacent pultrusion tube core materials 1 are solidified into the composite material web 6, and the composite material web 6 has two pieces; the composite material panel 6 is wrapped with carbon fiber cloth 7.
In specific implementation, the laying direction and the number of layers of the winding fiber cloth 3 and the outer covering fiber cloth 4 can be flexibly controlled according to requirements; the materials of the winding fiber cloth 3 and the wrapping fiber cloth 4 can be selected from: carbon fiber, glass fiber, aramid fiber or hybrid fiber cloth; the axial direction of the fibers in the winding fiber cloth 3 and the wrapping fiber cloth 4 can be selected: uniaxial, biaxial, or multiaxial; the interior of the pultrusion tube core material 1 is filled with light concrete.
The resin can be selected from: unsaturated polyester, vinyl, epoxy or phenolic resins.
The utility model integrally forms the composite material panel 6, the composite material web 5 and the pultrusion tube core material 1, thereby greatly improving the anti-stripping capability and the cooperative working capability of the composite material panel 6 and the pultrusion tube core material 1; the compression and shearing performance of the stress of the unidirectional fiber of the core material is obviously enhanced.
Referring to fig. 2, fig. 2 discloses a multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder, which is different from fig. 1 in that 3 pultruded tube core materials 1 are vertically stacked.
Referring to fig. 3, fig. 3 discloses a multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder, which is different from fig. 1 in that 2 rows of 3 layers of pultruded tube core materials 1 are horizontally spliced and stacked.
Referring to fig. 4, fig. 3 discloses a multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder, which is different from fig. 1 in that the pultruded tube core material 1 is provided with 3 rows of 2 layers, and 6 layers are vertically spliced.
Referring to fig. 5, fig. 5 is a schematic diagram of an application example of a multi-axial fiber-reinforced pultruded profile sandwich composite spandrel girder in engineering, fig. 6 is a cross-sectional view of a multi-axial fiber-reinforced pultruded profile sandwich composite spandrel girder used in fig. 5, and a pultruded pipe core material 1 adopted by the multi-axial fiber-reinforced pultruded profile sandwich composite spandrel girder in fig. 5 and fig. 6 is a square, and is provided with 2 rows and 2 layers, and 4 pultruded pipe core materials 1 are provided.
Referring to fig. 7, fig. 7 discloses ply angles of the wrapped fiber cloth 3 and the wrapped fiber cloth 4.
Referring to fig. 8 and 9, fig. 8 discloses an implementation case of a multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder in the railway transportation field, the composite spandrel girder replaces the traditional sleeper, and has the advantages of high strength, corrosion resistance, long service life, good track gauge retention capacity, flexible fastener installation, mechanized and continuous production, and the like, and has very good application prospect; fig. 9 is a schematic diagram of a specific structure of the multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder disclosed in fig. 8, which is formed by splicing and stacking single-layer three-row pultruded tube core materials 1.
Example 2
The embodiment discloses a preparation method of a multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder, which comprises the following steps:
and S1, sealing the two ends of the pultruded tube core material 1 by using the pultruded tube sealing material 2.
S2, laying 2 layers of wound fiber cloth 3 with an angle of 45 degrees/45 degrees on the outer surface material of the sealed pultruded tube core 1.
S3, splicing and folding the pultruded tube core 1 in the step S2, wherein the pultruded tube core 1 is provided with 1 row of 3 tubes, and the 3 tubes are spliced and folded according to a horizontal splicing and folding mode to form a combined member which is in the shape of a beam.
S4, laying four layers of externally-coated fiber cloth 4 on the outer surface of the combined member; the two ply angle on the inside near the outer surface of the composite member is 45/45 and is wrapped in the width direction of the beam and the two ply angle on the outside is 0/90 and is wrapped in the length direction of the beam.
S5, placing the combined component obtained in the step S4 in a vacuum bag or a mold, and pouring resin into the vacuum bag or the mold through a vacuum bag forming process, a vacuum lead-in forming process or an RTM forming process;
s6, after the resin is cured and molded, taking out the resin, and curing the fiber cloth 4 and the resin coated outside the resin into the composite material panel 6; inside the combined member, the winding fiber cloth 3 and the resin at the joint position of the upper and lower adjacent pultrusion pipe core materials 1 are solidified into a composite material web 5, and the multi-axial fiber reinforced pultrusion section sandwich composite material bearing beam can be prepared.
The details of the present invention are well known to those skilled in the art.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (3)
1. The utility model provides a multiaxial fibre reinforcing pultruded profile core combined material spandrel girder which characterized in that includes: the composite material comprises a pultruded tube core material, a pultruded tube sealing material, a composite material web and a composite material panel;
the core material of the pultrusion tube is of a rectangular cross section, the outer surface of the pultrusion tube is wound with winding fiber cloth, and the pultrusion tube is sealed by the sealing material; the pultrusion tube core material is provided with a plurality of pultrusion tube core materials which are spliced to form a combined component in a beam shape, and the mode of splicing and stacking the pultrusion tube core materials is as follows: horizontally splicing and stacking, vertically splicing and stacking, horizontally splicing and stacking a plurality of rows of pultruded tube core materials, and vertically splicing and stacking a plurality of layers of pultruded tube core materials;
the surface of the combined component formed by splicing and stacking the plurality of the pultrusion tube core materials is externally coated with externally coated fiber cloth;
the outer fiber cloth and resin are solidified into a composite material panel; in the combined member, winding fiber cloth and resin at the joint position of the pultrusion tube core materials which are adjacent up and down and/or adjacent left and right are cured into a composite material web; the composite material webs are arranged along the height direction and/or the length direction of the pultrusion pipe core material to form a spatial lattice web.
2. The spandrel girder of claim 1, wherein the sealing material of the pultruded tube is a composite sheet or a structural foam block, the composite sheet is sealed by gluing; the structural foam blocks are plugged into two ends of the pultrusion tube core material and are fixed for sealing; the composite material panel is wrapped with carbon fiber cloth.
3. The multi-axial fiber reinforced pultruded profile sandwich composite spandrel girder according to any of claims 1 to 2, wherein the axial direction of the fibers in said wrapped fiber cloth and said wrapped fiber cloth is: uniaxial, biaxial, or multiaxial; and light concrete is filled in the core material of the pultrusion tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021832278.2U CN212375639U (en) | 2020-08-28 | 2020-08-28 | Multi-axial fiber-reinforced pultruded profile sandwich composite spandrel girder |
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| CN202021832278.2U CN212375639U (en) | 2020-08-28 | 2020-08-28 | Multi-axial fiber-reinforced pultruded profile sandwich composite spandrel girder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114083843A (en) * | 2021-11-19 | 2022-02-25 | 航天特种材料及工艺技术研究所 | Composite material with layer structure design and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114083843A (en) * | 2021-11-19 | 2022-02-25 | 航天特种材料及工艺技术研究所 | Composite material with layer structure design and application thereof |
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