CN104452570A - Combined FRP (Fiber Reinforced Plastic) box-shaped sectional material for structure - Google Patents
Combined FRP (Fiber Reinforced Plastic) box-shaped sectional material for structure Download PDFInfo
- Publication number
- CN104452570A CN104452570A CN201410730482.6A CN201410730482A CN104452570A CN 104452570 A CN104452570 A CN 104452570A CN 201410730482 A CN201410730482 A CN 201410730482A CN 104452570 A CN104452570 A CN 104452570A
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- Prior art keywords
- box
- shaped
- standard sections
- section bar
- combined type
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/28—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of materials not covered by groups E04C3/04 - E04C3/20
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/40—Plastics
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a combined FRP (Fiber Reinforced Plastic) box-shaped sectional material for a structure. The combined FRP box-shaped sectional material comprises a repeating unit consisting of at least two standard sectional materials and two plate materials, wherein each standard sectional material is groove-shaped, I-shaped or box-shaped; the two standard sectional materials are arranged at intervals side by side; top plates and bottom plates of the two standard sectional materials are fixedly connected with the two plate materials, so that the section of the repeating unit is box-shaped. The combination mode of the combined FRP box-shaped sectional material is flexible, a larger section size can be realized, the durability of the structure is high, and the manufacturing process is simple, convenient and easy to operate; meanwhile, the combined FRP box-shaped sectional material is higher in designability and excellent in technical effect; requirements of building industrialization on the standardization and modulization of components of the structure are ingeniously met, the kinds of pulling extrusion molds are saved, and the problem that a current large-size FRP sectional material is high in pulling extrusion molding difficulty can be more effectively solved, so that the production cost of the large-size FRP sectional material is reduced.
Description
Technical field
The invention belongs to engineering structures technical field, be specifically related to a kind of structure combined type FRP box-shaped section bar.
Background technology
Due to the infrastructure durability degradation that corrosion of steel bar causes, cause huge economic loss.Improving infrastructure durability is the major issue that countries in the world economy and social development face.The appearance of fibre reinforced composites (Fiber Reinforced Polymer is called for short FRP), brings hope for promoting infrastructure durability.As compared to the structural meterials such as traditional steel, reinforcing bar and concrete, FRP material has excellent decay resistance, higher specific strength, specific modulus and the remarkable advantage such as anti-fatigue performance preferably.
In FRP section bar-concrete combined structure, FRP section bar not only can as the template of concrete structure, can also as the bending resistance reinforcing material of compound beam, improve while concrete structure durability also can the security performance of lift structure, when thus using in adverse circumstances, the performance advantage of FRP section bar-concrete combined structure is more obvious.There are some researches show, FRP section bar-concrete combined structure comparatively can fully play the advantage of the high-strength light of FRP material, corrosion resistant advantage and concrete high compressive strength, having high durable, lightweight, the advantages such as quick and endurance of constructing, is a kind of form of structure having application potential.
In the building and bridge construction of some large-scale employing composite material section bars, often need the FRP section bar that some sectional dimensions are larger.But existing pultrusion technique still has certain technical difficulty when the FRP section bar of shaping large scale (depth of section is greater than 1m).On the other hand, the pultrusion die of large scale FRP section bar is also very expensive.This limits applying of FRP section bar-Combined concrete material to a certain extent, thus urgently studies heavy in section size FRP section bar and manufacture method thereof.
Summary of the invention
The object of the invention is to overcome prior art defect, and provide a kind of structure combined type FRP box-shaped section bar, this section bar is simple for production, easy to operate, has stronger designability simultaneously, and technique effect is given prominence to.
For achieving the above object, the present invention adopts following technical scheme:
A kind of structure combined type FRP box-shaped section bar, described combined type FRP box-shaped section bar comprises the repetitive be made up of at least two standard sections and two boards material, and the shape of described standard sections is flute profile, I-shaped or box-shaped; Two standard sections spacing side by side are arranged, and top board, the base plate of two standard sections are fixedly connected with to make the cross section of repetitive to be box-shaped with two boards material.
Concrete, the top board of described standard sections is fixedly connected with two boards material with the interface manner of base plate by bolt and/or epoxy glue bonding.
The described combined type FRP box-shaped section bar number of plies be two-layer above time, levels standard sections should be placed by consistency from top to bottom.Namely web consistency from top to bottom is placed, and tackles unsettled frange plate simultaneously and does local downwarp checking computations, unsuitable excessive to ensure the clear distance between left and right two standard sections of same layer.
The contact surface of described standard sections and sheet material should be designed to coarse hair side, applies the well-distributed pressure of 0.1-0.5MPa, to increase the adhesion stress between each parts during construction in the normal direction of contact surface.
Described standard sections and sheet material are made up of fibrous material, and described fibrous material is one or more in glass fiber (GFRP), aramid fiber (AFRP), carbon fiber (CFRP) and basalt fibre (BFRP).Standard sections and sheet material are in manufacturing process, and the moulding resin adopted can be unsaturated polyester resin, vinylite, phenolic resins or epoxy resin etc.
The present invention is based on principle of stacking and combined interface without slip Theory, consider that industrialization of construction industry is to the standardization modularization requirement of structural element, sectional dimension and the relatively little FRP pultrusion standard sections (profile size meets certain modulus and requires) of moment of inertia and FRP pultrusion sheet material are spliced to form sectional dimension and the larger combined type FRP box-shaped section bar of moment of inertia by the mode of bolt and/or epoxy glue bonding, and the cross section of combined type FRP box-shaped section bar can be box-shaped, many box-shapeds and multilayer many box-shapeds uniform section form.The FRP pultrusion standard sections that described sectional dimension and moment of inertia are relatively little and FRP pultrusion sheet material need, in advance through reasonably design, to make combined type FRP box-shaped section bar can meet the requirement of flexural member strong shear capacity and weak bending capacity.After combination gained each parts of combined type FRP box-shaped section bar between should be able to collaborative work, jointly stressed.Combined type FRP box-shaped section combination mode of the present invention flexibly, larger sectional dimension can be realized, structure durability is high, manufacturing process is easy, easy to operate, there is stronger designability simultaneously, technique effect is given prominence to, and comparatively effectively can overcome the problem that current large scale FRP section bar pultrusion difficulty is large, be conducive to heavy in section size FRP profile structure and with concrete combined structure applying in highway bridge structure.In addition, the demand of industrialization of construction industry requires component standardization as much as possible, modularization, the thinking of the combined type FRP box-shaped section bar that the present invention proposes has met the above-mentioned requirements of industrialization of construction industry, decrease the kind of pultruded product, thus the value volume and range of product of drawing and extruding section bar mould can be reduced, reduce costs, enhance productivity.
Compared with prior art, beneficial effect of the present invention:
1) sectional dimension that designs in advance and moment of inertia relatively little FRP pultrusion standard sections and FRP pultrusion sheet material is adopted to be spliced to form sectional dimension and the larger combined type FRP box-shaped section bar of moment of inertia by the mode bondd by bolt and/or epoxy glue.
2) box-shaped and the stressed more reasonably section form such as I-shaped can be combined to form flexibly, save the die cost of pultrusion.
3) manufacturing process is easy, easy to operate, has stronger designability simultaneously, overcomes the problem that current large scale FRP section bar pultrusion difficulty is large.
4) a large amount of standardization FRP drawing and extruding section bar meeting certain modulus that adopts manufactures heavy in section combined type FRP box-shaped section bar, reduces kind and the manufacture difficulty of pultrusion die, is conducive to realizing suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is the structural representation of combined type FRP box-shaped section bar described in embodiment 1;
Fig. 2 is the structural representation of combined type FRP box-shaped section bar described in embodiment 2;
Fig. 3 is the structural representation of combined type FRP box-shaped section bar described in embodiment 3;
Fig. 4 is the structural representation of combined type FRP box-shaped section bar described in embodiment 4;
Fig. 5 is the structural representation of combined type FRP box-shaped section bar described in embodiment 5;
Fig. 6 is the structural representation of combined type FRP box-shaped section bar described in embodiment 6.
Detailed description of the invention
The present invention is described further by the following examples, but protection scope of the present invention is not limited thereto.
embodiment 1
As shown in Figure 1, a kind of bonded individual layer list case combined type FRP box-shaped section bar, comprises the repetitive be made up of two standard sections 1 and two boards material 2.The shape of described standard sections 1 is I-shaped.Two standard sections 1 spacing side by side are arranged, and the mode that the top board 21 of two standard sections 1, base plate 22 are bondd by epoxy glue 3 is fixedly connected with to make the cross section of repetitive to be box-shaped with two boards material 2.
The contact surface of two standard sections 1 and two boards material 2 is pre-designed rough surface, to increase the adhesion strength of epoxy glue.The well-distributed pressure of 0.2MPa is applied in the normal direction of contact surface, to increase the adhesion stress between each parts during construction.Two standard sections 1 and two boards material 2 need, in advance through reasonably design, to make combined type FRP box-shaped section bar can meet the requirement of strong shear capacity and weak bending capacity.
embodiment 2
As shown in Figure 2, a kind of Hybrid connections formula individual layer list case combined type FRP box-shaped section bar, comprises the repetitive be made up of two standard sections 1 and two boards material 2.The shape of described standard sections 1 is I-shaped.Two standard sections 1 spacing side by side are arranged, and the interface manner that the top board 21 of two standard sections 1, base plate 22 are combined by stainless steel bolt 4 and epoxy glue 3 Binder Phase is fixedly connected with to make the cross section of repetitive to be box-shaped with two boards material 2.
The contact surface of two standard sections 1 and two boards material 2 is pre-designed rough surface, to increase the adhesion strength of epoxy glue.The well-distributed pressure of 0.2MPa is applied in the normal direction of contact surface, to increase the adhesion stress between each parts during construction.Two standard sections 1 and two boards material 2 need, in advance through reasonably design, to make combined type FRP box-shaped section bar can meet the requirement of strong shear capacity and weak bending capacity.
embodiment 3
As shown in Figure 3, a kind of bonded bilayer single case combined type FRP box-shaped section bar, comprises the repetitive of two vertical arrangements be made up of four standard sections 1 and three blocks of sheet material 2.The shape of described standard sections 1 is I-shaped.The mode that the top board 21 of described standard sections 1, base plate 22 are bondd by epoxy glue 3 and sheet material 2 are fixedly connected to form the repetitive that cross section is box-shaped.The combined type FRP box-shaped section bar number of plies is two-layer, two standard sections 1 spacing side by side of every layer are arranged, standard sections 1 consistency from top to bottom of levels places (i.e. web consistency from top to bottom placement, tackle unsettled frange plate simultaneously and do local downwarp checking computations, to ensure that same layer is left, clear distance between right two standard sections is unsuitable excessive), the top board 21 of upper strata standard sections 1 connects upper strata sheet material 2, the base plate 22 of upper strata standard sections 1 is connected with the upper surface of intermediate layer sheet material 2, the top board 21 of lower floor's standard sections 1 is connected with the soffit of intermediate layer sheet material 2, the base plate 22 of lower floor's standard sections 1 connects lower floor's sheet material 2.
The contact surface of standard sections 1 and sheet material 2 is pre-designed rough surface, to increase the adhesion strength of epoxy glue.The well-distributed pressure of 0.4MPa is applied in the normal direction of contact surface, to increase the adhesion stress between each parts during construction.Standard sections 1 and sheet material 2 need, in advance through reasonably design, to make combined type FRP box-shaped section bar can meet the requirement of strong shear capacity and weak bending capacity.
embodiment 4
As shown in Figure 4, the two case combined type FRP box-shaped section bar of a kind of bonded bilayer, (repetitive is divided into two-layer to comprise four repetitives be made up of six standard sections 1 and three blocks of sheet material 2, every layer of each two repetitive, wherein, the standard sections 1 in the middle of upper strata, the standard sections 1 on the left of upper strata and upper strata, intermediate layer sheet material 2 form a repetitive on upper strata; Standard sections 1 in the middle of upper strata, the standard sections 1 on the right side of upper strata and upper strata and intermediate layer sheet material 2 form another repetitive on upper strata; The repetitive of lower floor forms situation and upper class seemingly, so repeat no more).The shape of described standard sections 1 is I-shaped.The mode that the top board 21 of described standard sections 1, base plate 22 are bondd by epoxy glue 3 and sheet material 2 are fixedly connected to form the repetitive that cross section is box-shaped.The combined type FRP box-shaped section bar number of plies is two-layer, between two standard sections 1 of every layer, spacing side by side is arranged, levels standard sections 1 consistency from top to bottom is placed, and (namely web consistency from top to bottom is placed, tackle unsettled frange plate simultaneously and do local downwarp checking computations, to ensure that same layer is left, clear distance between right two standard sections is unsuitable excessive), the top board 21 of upper strata standard sections 1 connects upper strata sheet material 2, the base plate 22 of upper strata standard sections 1 is connected with the upper surface of intermediate layer sheet material 2, the top board 21 of lower floor's standard sections 1 is connected with the soffit of intermediate layer sheet material 2, the base plate 22 of lower floor's standard sections 1 connects lower floor's sheet material 2.
The contact surface of standard sections 1 and sheet material 2 is pre-designed rough surface, to increase the adhesion strength of epoxy glue.The well-distributed pressure of 0.5MPa is applied in the normal direction of contact surface, to increase the adhesion stress between each parts during construction.Standard sections 1 and sheet material 2 need, in advance through reasonably design, to make combined type FRP box-shaped section bar can meet the requirement of strong shear capacity and weak bending capacity.
embodiment 5
As shown in Figure 5, a kind of bonded individual layer list case combined type FRP box-shaped section bar, comprises the repetitive be made up of two standard sections 1 and two boards material 2.The shape of described standard sections 1 is flute profile; Two standard sections 1 spacing side by side are arranged, and the mode that the top board 21 of two standard sections 1, base plate 22 are bondd by epoxy glue 3 is fixedly connected with to make the cross section of repetitive to be box-shaped with two boards material 2.
The contact surface of two standard sections 1 and two boards material 2 is pre-designed rough surface, to increase the adhesion strength of epoxy glue.The well-distributed pressure of 0.3MPa is applied in the normal direction of contact surface, to increase the adhesion stress between each parts during construction.Two standard sections 1 and two boards material 2 need, in advance through reasonably design, to make combined type FRP box-shaped section bar can meet the requirement of strong shear capacity and weak bending capacity.
embodiment 6
As shown in Figure 6, a kind of bonded individual layer list case combined type FRP box-shaped section bar, comprises the repetitive be made up of two standard sections 1 and two boards material 2.The shape of described standard sections 1 is box-shaped; Two standard sections 1 spacing side by side are arranged, and the mode that the top board 21 of two standard sections 1, base plate 22 are bondd by epoxy glue 3 is fixedly connected with to make the cross section of repetitive to be box-shaped with two boards material 2.
The contact surface of two standard sections 1 and two boards material 2 is pre-designed rough surface, to increase the adhesion strength of epoxy glue.The well-distributed pressure of 0.3MPa is applied in the normal direction of contact surface, to increase the adhesion stress between each parts during construction.Two standard sections 1 and two boards material 2 need, in advance through reasonably design, to make combined type FRP box-shaped section bar can meet the requirement of strong shear capacity and weak bending capacity.
Obviously, above-described embodiment is only clearly example to be described, but not the restriction to combination.Here exhaustive without the need to also giving all combining forms.And the apparent change of amplifying out thus or variation are still among protection scope of the present invention.
Claims (5)
1. a structure combined type FRP box-shaped section bar, is characterized in that, described combined type FRP box-shaped section bar comprises the repetitive be made up of at least two standard sections and two boards material, and the shape of described standard sections is flute profile, I-shaped or box-shaped; Two standard sections spacing side by side are arranged, and top board, the base plate of two section bars are fixedly connected with to make the cross section of repetitive to be box-shaped with two boards material.
2. structure combined type FRP box-shaped section bar as claimed in claim 1, is characterized in that, the top board of described standard sections and base plate are fixedly connected with two boards material by the interface manner of bolt and/or epoxy glue bonding.
3. structure combined type FRP box-shaped section bar as claimed in claim 1, is characterized in that, the described combined type FRP box-shaped section bar number of plies be two-layer above time, levels standard sections consistency from top to bottom is placed.
4. structure combined type FRP box-shaped section bar as claimed in claim 1, it is characterized in that, the contact surface of described standard sections and sheet material is coarse hair side, applies the well-distributed pressure of 0.1-0.5MPa during construction in the normal direction of contact surface.
5. structure combined type FRP box-shaped section bar as claimed in claim 1, it is characterized in that, described standard sections and sheet material are made up of fibrous material, and described fibrous material is one or more in glass fiber, aramid fiber, carbon fiber and basalt fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730482.6A CN104452570B (en) | 2014-12-05 | 2014-12-05 | Combined FRP (Fiber Reinforced Plastic) box-shaped sectional material for structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730482.6A CN104452570B (en) | 2014-12-05 | 2014-12-05 | Combined FRP (Fiber Reinforced Plastic) box-shaped sectional material for structure |
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| Publication Number | Publication Date |
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| CN104452570A true CN104452570A (en) | 2015-03-25 |
| CN104452570B CN104452570B (en) | 2017-02-01 |
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| CN201410730482.6A Active CN104452570B (en) | 2014-12-05 | 2014-12-05 | Combined FRP (Fiber Reinforced Plastic) box-shaped sectional material for structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115012325A (en) * | 2022-05-06 | 2022-09-06 | 西安交通大学 | Concrete box girder bridge reinforcing scheme based on FRP (fiber reinforced plastic) section bars |
Citations (6)
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|---|---|---|---|---|
| CN1190929A (en) * | 1995-07-12 | 1998-08-19 | 国际壳牌研究有限公司 | Sandwich structure |
| CN200946244Y (en) * | 2006-06-16 | 2007-09-12 | 清华大学 | Outer fiber enwound reinforced composite material hollow decking |
| TW201344018A (en) * | 2012-04-27 | 2013-11-01 | You-Feng Li | Reinforced fiber reinforced plastic (FRP) component |
| JP2014117869A (en) * | 2012-12-17 | 2014-06-30 | Mitsubishi Plastics Inc | Structure made of frp and building-civil engineering structure using the same |
| CN104032667A (en) * | 2014-06-03 | 2014-09-10 | 南京工业大学 | Interlayer structure adopting composite material as core and steel plate as cover skin |
| CN204282186U (en) * | 2014-12-05 | 2015-04-22 | 郑州大学 | A kind of structure combined type FRP box-shaped section bar |
-
2014
- 2014-12-05 CN CN201410730482.6A patent/CN104452570B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190929A (en) * | 1995-07-12 | 1998-08-19 | 国际壳牌研究有限公司 | Sandwich structure |
| CN200946244Y (en) * | 2006-06-16 | 2007-09-12 | 清华大学 | Outer fiber enwound reinforced composite material hollow decking |
| TW201344018A (en) * | 2012-04-27 | 2013-11-01 | You-Feng Li | Reinforced fiber reinforced plastic (FRP) component |
| JP2014117869A (en) * | 2012-12-17 | 2014-06-30 | Mitsubishi Plastics Inc | Structure made of frp and building-civil engineering structure using the same |
| CN104032667A (en) * | 2014-06-03 | 2014-09-10 | 南京工业大学 | Interlayer structure adopting composite material as core and steel plate as cover skin |
| CN204282186U (en) * | 2014-12-05 | 2015-04-22 | 郑州大学 | A kind of structure combined type FRP box-shaped section bar |
Non-Patent Citations (1)
| Title |
|---|
| 马文刚等: "装配式公路钢桥FRP桥面板研究", 《城市道桥与防洪》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115012325A (en) * | 2022-05-06 | 2022-09-06 | 西安交通大学 | Concrete box girder bridge reinforcing scheme based on FRP (fiber reinforced plastic) section bars |
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| CN104452570B (en) | 2017-02-01 |
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