CN204475668U - A kind of FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell beam - Google Patents
A kind of FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell beam Download PDFInfo
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- CN204475668U CN204475668U CN201520043655.7U CN201520043655U CN204475668U CN 204475668 U CN204475668 U CN 204475668U CN 201520043655 U CN201520043655 U CN 201520043655U CN 204475668 U CN204475668 U CN 204475668U
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Abstract
The utility model discloses a kind of FRP pipe-concrete-many steel pipe hollows and combine single case or many casees multicell beam, managed by outer field FRP, built-in steel pipe, and two-layer between concrete three part composition; Described outer field FRP pipe is single case or many casees multicell beam form; Built-in steel pipe quantity is equal to or greater than two; Longitudinal center's axis of built-in steel pipe is arranged in outer field FRP pipe axisymmetricly, forms hollow combination single-box multi-cell beam or many casees multicell beam; The utility model adopts Single-box multi-chamber box girder or many casees multi cell box girder combining form, can effectively improve combined member globality, torsional rigidity, stability, improve the ability that it bears unbalance loading and transverse load; This component has good ductility and anti-seismic performance; Outside parcel resistant material FRP makes built-in concrete and steel pipe be effectively protected, and have good durability, later maintenance expense is lower; This component also has from the advantage such as heavy and light, easy construction, requires that higher area has broad application prospects in durability and shock resistance.
Description
Technical field
The utility model relates to a kind of FRP pipe-concrete-many steel pipe hollows and combines single case or many casees multicell beam.
Background technology
Concrete filled steel tube technology is widely used in Practical Project, but due to steel pipe outside exposed, be easily subject to the erosion of external environment condition.At some to requiring in higher large-scale construction engineering by curved, compression capability, according to concrete filled steel tube technology, the global sections size of component must be strengthened to ensure that it has enough bearing capacities, but strengthen member section not only consume material, and can member dead weight be increased.
In recent years, fibre reinforced composites (Fiber Reinforced Polymer, be called for short FRP) have been widely used in the maintenance and reinforcement of old structure because of its lightweight, high-strength, corrosion resistant feature, and start to apply in newly-built structure.The utility model provides a kind of FRP pipe-concrete-many steel pipe hollows to combine single case or many casees multicell beam, give full play to the advantage of FRP, steel pipe, concrete three kinds of materials, and optimize member integrated performance with maximizing favourable factors and minimizing unfavourable ones, effectively can solve above-mentioned conventional steel concrete component Problems existing, there is very large development prospect in Practical Project.
Summary of the invention
The utility model provides a kind of FRP pipe-concrete-many steel pipe hollows and combines single case or many casees multicell beam, its main purpose is the combining form by optimizing FRP, steel pipe, concrete three kinds of materials, give full play to the mechanical characteristic of steel and FRP, improve the deficiency of concrete stress performance and durability aspect, there is good anti-seismic performance, ductility and durability.Because corrosion resistant FRP material is wrapped up in outside, built-in concrete and steel pipe are effectively protected, therefore the utility model component has good durability, later maintenance expense required after coming into operation is lower.In addition, the utility model component also has from the advantage such as heavy and light, easy construction, is applicable to build high performance building structure, bridge construction and other infrastructure architecture, requires that higher area has broad application prospects in durability and shock resistance.
A kind of FRP pipe-concrete-many steel pipe hollows that the utility model provides combine single case or many casees multicell beam, by outer field FRP pipe 1, built-in steel pipe 2, and two-layer between concrete 3 three part composition; Described outer field FRP pipe 1 is single case or many casees multicell beam form; Built-in steel pipe 2 quantity is equal to or greater than two; Longitudinal center's axis of built-in steel pipe 2 is arranged in outer field FRP pipe 1 axisymmetricly, forms hollow combination single-box multi-cell beam or many casees multicell beam.
Described built-in steel pipe 2 inside is hollow, can according to structure stress needs, all or part of fill concrete.
The concrete type that between described built-in steel pipe 2 and outer field FRP pipe 1 and built-in steel pipe 2 inside is filled is ordinary concrete, high-strength concrete, expansive concrete, recovery aggregate concrete, fly ash concrete, fibrous concrete or other concrete.
Described outer field FRP pipe 1 and built-in steel pipe 2 are straight tube or are bend pipe.
Described outer field FRP pipe 1 and built-in steel pipe 2 are uniform section or variable cross-section along its length.
The cross sectional shape of described built-in steel pipe 2 is circle, ellipse, the square with radiused angle, the rectangle with radiused angle or other polygons with radiused angle.
the beneficial effects of the utility model:
The utility model has the feature from heavy and light, and except adopting the FRP material of lightweight, the space of steel duct also alleviates dead load effectively.Meanwhile, built-in steel pipe and outer FRP pipe as the permanent formwork of concreting, not only can be saved formwork cost and also help the reduction of erection time.Based on above feature, this new structural members can be used as main supporting member be widely used in building structure, bridge construction and and other infrastructure architecture in.
For pressurized (during as applied axial prestress to beam), in pressurized process, because its critical bearing capacity is directly subject to the impact of steel pipe radius-thickness ratio, can there is limitation when practical application in the single thin-wall steel tube that internal diameter is large, wall thickness is thin.The utility model adopts the steel pipe of built-in two or many, compared with its FRP-concrete-steel pipe hollow combined member with built-in single steel pipe and similar component (as patent CN 202831403 U, CN 201943186 U), the advantage of combined member form of the present utility model is: can realize needing the built-in steel pipe of flexible arrangement according to actual loading, give full play to the advantage of various material, combined member can be promoted in bearing capacity and in resistance to overturning greatly.Can also according to the needs of structure stress in hollow steel pipe, all or part of (as simply supported beam span centre or the larger part of continuous beam intermediate support place equal bending moments) fill concrete.
Curved for being subject to, the utility model can adopt Single-box multi-chamber box girder (as Fig. 1,2) or the combining form of many casees multi cell box girder (Fig. 3), when sectional aspect ratio is larger, more stressed than single cell box girder more reasonable, be mainly manifested in: the median ventral plate of (1) multi cell box girder structure and the stress distribution of limit web tend to even gradually, can reduce local failure, therefore multi cell box girder structural rate single cell box girder structural integrity and lateral stability better; (2) multi cell box girder structure torsional rigidity is larger, all has good stability, effectively can reduce structure under Under Eccentric Loading, cross section local distortion and distortion effect adverse effect in construction and use procedure; (3) be conducive to building and more widen flat bridge, make Bridges more graceful, and the impact of wind load can be reduced.Suffered by the middle pectoral plate of simultaneously multi cell box girder structure, the impact of external environment is minimum, its inner concrete temperature basicly stable and to be single box single chamber case beam lower than structure time concrete temperature, thus reduce temperature effect to the impact of monolithic concrete.
Functionally; in the utility model, different built-in steel pipe is separated by concrete; dissimilar pipeline can pass respectively in different steel pipe, and this serves good protected effect to pipeline, is conducive to preventing the structural failure because pipeline damages or ageing failure causes and other secondary disasters.
accompanying drawing illustrates:
Fig. 1 is depicted as elliptic cross-section four identical steel pipes, is symmetrically arranged in outside square-section in FRP pipe with axle center, formation
FRP pipe-concrete-many steel pipe hollows combine single case four chamber beam combined member cross sectional representation;
Fig. 2 is depicted as the identical steel pipe in three, square-section (band fillet), is symmetrically arranged in the outer FRP of polygonal cross-section with axle center
In pipe, form FRP pipe-concrete-many steel pipe hollows and combine single case three chamber beam combined member cross sectional representation;
Fig. 3 is depicted as based on Fig. 2 Single-box multi-chamber box girder form, and according to actual conditions, adopt n (n >=2) individual single box unit body, FRP pipe-concrete-many steel pipe hollows of formation combine many casees multi cell box girder combined member cross sectional representation;
Fig. 4 is depicted as the longitudinal profile schematic diagram that FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell non-uniform beam;
Fig. 5 is depicted as FRP pipe-concrete-many steel pipe hollows and combines single case or many casees multicell camber beam longitudinal profile schematic diagram;
Fig. 6 is depicted as FRP pipe-concrete-many steel pipe hollows and combines single case or many casees multicell straight beam component longitudinal profile schematic diagram.
Fig. 7 is depicted as rectangle (band fillet) the outer FRP cross sectional representation that FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell beam;
Fig. 8 is depicted as polygon (band fillet) the outer FRP cross sectional representation that FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell beam;
Fig. 9 is depicted as rectangle (band fillet) the built-in steel pipe cross sectional representation that FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell beam;
Figure 10 is depicted as the built-in steel pipe cross sectional representation of ellipse that FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell beam;
Figure 11 is depicted as the built-in steel pipe cross sectional representation of circle that FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell beam;
Figure 12 is depicted as square (band fillet) built-in steel pipe cross sectional representation that FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell beam.
Figure 13 is depicted as regular hexagon shape (band fillet) the built-in steel pipe cross sectional representation that FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell beam.
Number in the figure illustrates: the outer field FRP pipe of 1-; The steel pipe that 2-is built-in; 3-concrete.
Detailed description of the invention
In order to make those skilled in the art understand the technical solution of the utility model better, below in conjunction with accompanying drawing and concrete enforcement, the utility model is described in further detail.
First type selecting is carried out to outer field FRP pipe 1 and built-in steel pipe 2, built-in steel pipe 2 is inserted in outer field FRP pipe 1, and same one end of steel pipe 2 and outer field FRP pipe 1 in sealing, concrete 3 is built between built-in steel pipe 2 and outer outer field FRP pipe 1, and carry out maintenance.
Outer field FRP pipe 1 can use typical section form as shown in Figure 7 and Figure 8, but is not limited to above-mentioned section form, and outer field FRP pipe 1 can carry out any type selecting outside these section forms.
Built-in steel pipe 2 by typical section form as shown in Fig. 9-Figure 13, but can be not limited to above-mentioned section form, and built-in steel pipe 2 can carry out any type selecting outside these section forms.
The outer field FRP pipe 1 chosen and built-in steel pipe 2 can independent assortments.
The utility model can be straight beam, as shown in Figure 6; Also can be camber beam, as shown in Figure 5; Cross section can be uniform section at component genesis analysis, as shown in Fig. 5-Fig. 6, also can be variable cross-section, as shown in Figure 4, should select flexibly according to stressing conditions.
Can according to the needs of structure stress in hollow steel pipe, all or part of (as simply supported beam span centre or the larger part of continuous beam intermediate support place equal bending moments) fill concrete.
Space in hollow steel pipe can be used as the passage of hydroelectric line.
According to the different situations of outer FRP pipe, the utility model can take the making step that the following two kinds is different:
The concrete making step of scheme one is as follows:
(1) type selecting carried out to built-in steel pipe and determine the outer peripheral shape of template of component;
(2) built-in steel pipe is inserted in template, and same one end of the built-in steel pipe of sealing and template;
(3) by concreting between built-in steel pipe and template, and carry out maintenance;
(4) after maintenance completes, stripping;
(5) in component outer felt around stickup FRP material, the number of plies should meet instructions for use, and makes it be wrapped in outside component.
The concrete making step of scheme two is as follows:
(1) type selecting is carried out to built-in steel pipe and outer field FRP pipe;
(2) built-in steel pipe is inserted in outer field FRP to manage, and same one end of the built-in steel pipe of sealing and outer field FRP pipe;
(3) by concreting between outer field FRP pipe with built-in steel pipe, carry out maintenance complete after without the need to form removal.
Finally illustrate, above example only in order to the technical solution of the utility model to be described, and is described in detail the utility model.Those of ordinary skill in the art can modify to the technical solution of the utility model or equivalent replacement, but only otherwise depart from the aim of technical solutions of the utility model and scope, its related amendments and equivalent replacement all should be encompassed in the middle of right of the present utility model.
Claims (6)
1. FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell beam, it is characterized in that: manage (1) by outer field FRP, built-in steel pipe (2), and two-layer between concrete (3) three part composition; Described outer field FRP pipe (1) is single case or many casees multicell beam form; Built-in steel pipe (2) quantity is equal to or greater than two; Longitudinal center's axis of built-in steel pipe (2) is arranged in outer field FRP axisymmetricly and manages in (1), forms hollow combination single-box multi-cell beam or many casees multicell beam.
2. hollow combination list case according to claim 1 or many casees multicell beam, is characterized in that: described built-in steel pipe (2) inside is hollow, all or part of fill concrete.
3. hollow combination list case according to claim 1 or many casees multicell beam, is characterized in that: it is ordinary concrete, high-strength concrete, expansive concrete, self-compacting concrete, recovery aggregate concrete, fly ash concrete or fibrous concrete that described built-in steel pipe (2) and outer field FRP manage the concrete type of filling steel pipe (2) inside between (1) and built-in.
4. hollow combination list case according to claim 1 or many casees multicell beam, is characterized in that: described outer field FRP pipe (1) and built-in steel pipe (2) are straight tube or are bend pipe.
5. hollow combination list case according to claim 1 or many casees multicell beam, is characterized in that: described outer field FRP pipe (1) and built-in steel pipe (2) are uniform section or variable cross-section along its length.
6. the hollow combination list case according to claim 1,2,3,4 or 5 or many casees multicell beam, is characterized in that: the cross sectional shape of described built-in steel pipe (2) is circular, oval or with radiused angle polygon.
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| CN201520043655.7U CN204475668U (en) | 2015-01-21 | 2015-01-21 | A kind of FRP pipe-concrete-many steel pipe hollows combine single case or many casees multicell beam |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563390A (en) * | 2015-01-21 | 2015-04-29 | 广东工业大学 | FRP (fiber reinforce plastic) tube-concrete-multiple steel tube hollow combined single-box or multi-box multi-compartment beam |
| CN105275151A (en) * | 2015-11-18 | 2016-01-27 | 中国航空规划设计研究总院有限公司 | Variable-cross-section high-aperture-ratio steel beam structure |
| CN105350441A (en) * | 2015-11-30 | 2016-02-24 | 广东工业大学 | Concrete combined box beam internally provided with tie bar steel and box column |
| CN108118605A (en) * | 2017-12-18 | 2018-06-05 | 王燕 | A kind of cast-in-situ box girder applied to science of bridge building |
-
2015
- 2015-01-21 CN CN201520043655.7U patent/CN204475668U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563390A (en) * | 2015-01-21 | 2015-04-29 | 广东工业大学 | FRP (fiber reinforce plastic) tube-concrete-multiple steel tube hollow combined single-box or multi-box multi-compartment beam |
| CN105275151A (en) * | 2015-11-18 | 2016-01-27 | 中国航空规划设计研究总院有限公司 | Variable-cross-section high-aperture-ratio steel beam structure |
| CN105350441A (en) * | 2015-11-30 | 2016-02-24 | 广东工业大学 | Concrete combined box beam internally provided with tie bar steel and box column |
| CN108118605A (en) * | 2017-12-18 | 2018-06-05 | 王燕 | A kind of cast-in-situ box girder applied to science of bridge building |
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