CN203270436U - Light anti-bending supporting member based on FRP and flexible arch body - Google Patents
Light anti-bending supporting member based on FRP and flexible arch body Download PDFInfo
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- CN203270436U CN203270436U CN 201320297530 CN201320297530U CN203270436U CN 203270436 U CN203270436 U CN 203270436U CN 201320297530 CN201320297530 CN 201320297530 CN 201320297530 U CN201320297530 U CN 201320297530U CN 203270436 U CN203270436 U CN 203270436U
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Abstract
The utility model relates to the technical field of bridge construction, in particular to a light anti-bending supporting member based on FRP and a flexible arch body. The light anti-bending supporting member based on the FRP and the flexible arch body comprises an arch ring, a prestressed tendon and two skewbacks. Each of the two ends of the arch ring is connected with the inner side of one skewback, the arch ring further comprises a flexible arch band and a plurality of FRP grids, and the longitudinal section of each FRP grid is an isosceles trapezoid. The light anti-bending supporting member based on the FRP and the flexible arch body comprises an FRP outer protective shell, wherein a base plate of the FRP outer protective shell is detachable. The arch ring, the prestressed tendon and the two skewbacks are all located inside the FRP outer protective shell. Due to the fact that the FRP grids and the flexible band are used as arch crown connecting pieces of the arch ring, the bearing load and the stability of the structure are improved, and the problem that the top is prone to fracture when prestress is applied is solved. The strength of the supporting member is mainly provided by the flexible arch ring and the bottom prestress tendon, the wrapping FRP outer shell protects steel bars/FRP ribs and concrete, so that the purposes that the light anti-bending supporting member based on the FRP and the flexible arch body is longer in service life and lowest in maintenance demand are guaranteed.
Description
Technical field
The utility model relates to bridge construction construction technique field, refers in particular to a kind of light-duty bending resistance supporting member based on FRP and flexible donor.
Background technology
The beam that generally uses in the engineering structures such as bridge, building field at present comprises steel concrete (Reinforced concrete, RC) beam and girder steel.These two kinds of beam corrosion resistances are all relatively poor, in the open air, coastal or flush wait in adverse circumstances easily corrosion and degenerate.
In order to solve durability and the degenerate problem of building, bridge construction in worldwide, fiber-reinforced polymer (fibre-reinforced polymer, FRP) composite material obtains using more and more widely in recent years.FRP is a kind ofly mixed with resin matrix by the contour performance fibers of carbon fiber, glass fiber and basalt fibre, the novel metalloid material that is composited through certain processing technology.FRP has very strong corrosion resistance, also has simultaneously the advantages such as lightweight, high-strength, convenient formation.
In addition, in traditional bridge engineering, use in the structure than large span in order to make supporting member, the common presstressed reinforcing steel that adopts in brace summer member bottom is to improve the flexural member flexural strength.Due to effects such as prestress steel relaxation, anchor deformation and concrete shrinkage and creep, the existing effective prestress of in-service Prestressed Concrete Bridges structure after using for many years is usually larger with the design stress difference.And prestressed loss is very great on the impact of the supporting capacity of bridge.And traditional method of testing is difficult to accurately test the presstressed reinforcing steel stress level of service state.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of support housing weight that reduces, and increases the service life and the light-duty bending resistance supporting member based on FRP and flexible donor of the maintenance needs that reduces.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of light-duty bending resistance supporting member based on FRP and flexible donor, comprise arch ring, presstressed reinforcing steel and two arch springings, the two ends of arch ring are connected with the inboard of two arch springings respectively, the two ends of described presstressed reinforcing steel are fixedly connected with the bottom of two arch springings respectively, described arch ring comprises sliding roadway arch band and a plurality of FRP grid, these a plurality of FRP grids are adjacent being set up in parallel in the soffit of described sliding roadway arch band mutually, and the longitudinal section of each FRP grid is isosceles trapezoid; Comprise that also the dismountable FRP of base plate protects shell outward, described arch ring, presstressed reinforcing steel and two arch springings all are positioned at FRP and protect shell outward.
Wherein, the FRP grid that is positioned at described sliding roadway arch band end is fixed with the arch ring positioning key, and the other end of this arch ring positioning key is fixedly connected with the inboard of arch springing.
Wherein, the described FRP top of protecting shell outward is provided with a plurality of shear connectors.
Wherein, described arch ring is sling when being connected with arch springing, the two ends of described sliding roadway arch band are bent downwardly, the side of two adjacent FRP grids mutually against.
Wherein, the below of described arch ring is filled with foam-filled thing.
Wherein, described FRP protects other space fill concretes in shell outward.
The beneficial effects of the utility model are: the utility model provides a kind of light-duty bending resistance supporting member based on FRP and flexible donor, protect outside FRP and place flexible donor in shell, FRP grid (fibrous composite grid) is adopted at the donor top, and this arch ring is as the renitency member in supporting member; The supporting member bottom is without concrete, and the configuration presstressed reinforcing steel, and the deadweight of integrated support member is lighter, convenient transportation and installation; The FRP that adopts protects the base plate of shell outward and can open, and convenient stress level to presstressed reinforcing steel detects; Described arch ring adopts FRP grid and sliding roadway arch band as the vault connector, improves structural bearing and stability, also solves the problem that easily causes the top cracking in prestressing force test ride process.Mainly from flexible arch ring and bottom presstressed reinforcing steel material, the FRP shell of coating is being protected reinforcing bar/FRP muscle and concrete to the intensity of this utility model supporting member, has longer application life and minimum maintenance needs to guarantee it.
Description of drawings
Fig. 1 is the structural representation of the utility model arch ring, presstressed reinforcing steel and arch springing.
Fig. 2 is the structural model schematic diagram of the utility model bending resistance supporting member.
Fig. 3 is the structural representation before arch ring is sling.
Fig. 4 is that arch ring is sling, the structural representation the when two ends of sliding roadway arch band are bent downwardly.
The specific embodiment
For the ease of those skilled in the art's understanding, below in conjunction with embodiment and accompanying drawing, the utility model is further described, the content that embodiment is mentioned not is to restriction of the present utility model.
As shown in Figures 1 to 4, a kind of light-duty bending resistance supporting member based on FRP and flexible donor, comprise arch ring, presstressed reinforcing steel 1 and two arch springings 2, the two ends of arch ring are connected with the inboard of two arch springings 2 respectively, the two ends of described presstressed reinforcing steel 1 are fixedly connected with the bottom of two arch springings 2 respectively, described arch ring comprises sliding roadway arch band 3 and a plurality of FRP grid 4, mutual adjacent being set up in parallel in the soffit of described sliding roadway arch band 3 of these a plurality of FRP grids 4, and the longitudinal section of each FRP grid 4 is isosceles trapezoid; Comprise that also the dismountable FRP of base plate 5 protects shell 6 outward, described arch ring, presstressed reinforcing steel 1 and two arch springings 2 all are positioned at FRP and protect shell 6 outward.
Protect the flexible arch ring of the interior placement of shell 6 outside described FRP, donor top employing FRP grid 4(fibrous composite grid), this arch ring is as the renitency member in supporting member; The supporting member bottom is without concrete, and configuration presstressed reinforcing steel 1, and the deadweight of integrated support member is lighter, convenient transportation and installation; The FRP that adopts protects the base plate 5 of shell 6 outward and can open, and convenient stress level to presstressed reinforcing steel 1 detects; Described arch ring adopts FRP grid 4 and sliding roadway arch band 3 as the vault connector, improves structural bearing and stability, also solves the problem that easily causes the top cracking in prestressing force test ride process.Mainly from flexible arch ring and bottom presstressed reinforcing steel 1 material, the FRP shell of coating is being protected reinforcing bar/FRP muscle and concrete to the intensity of this utility model supporting member, has longer application life and minimum maintenance needs to guarantee it.
See Fig. 1 and Fig. 2, in the present embodiment, the FRP grid 4 that is positioned at described sliding roadway arch band 3 ends is fixed with arch ring positioning key 7, the other end of this arch ring positioning key 7 is fixedly connected with the inboard of arch springing 2, in the bridge construction process, improve the accurate positioning between arch ring and arch springing 2, on the other hand on the one hand, improved the tightness that is connected between described arch ring and arch springing 2, the stabilized structure of bridge is higher.
See Fig. 2, the top that the described FRP of the present embodiment protects shell 6 outward is provided with a plurality of shear connectors 8, in the building course of bridge deck concrete, the effect of shear connector 8 is to prevent between supporting member and concrete the mutual slippage of both levels at the interface or separates, further improves the steadiness of crossstructure.
In the present embodiment, described arch ring is sling when being connected with arch springing 2, the two ends of described sliding roadway arch band 3 are bent downwardly, the side of two adjacent FRP grids 4 mutually against, FRP grid 4 is completed before rear back-up sand slurry, the deadweight of integrated support member is lighter, convenient transportation and installation when the construction of bridge, can be carried out the construction of back-up sand slurry again, shorten the time of bridge at outdoor construction, reduced the construction cost of bridge.
See Fig. 2, the below of the described arch ring of the present embodiment is filled with foam-filled thing 9, and described FRP protects other space fill concretes 10 in shell 6 outward.Because supporting member bottom need not concrete and top layer just has lighter foam-filled thing 9, gross mass will increase the load capacity of bridge lower than traditional supporting member, and practicality is stronger.
Above-described embodiment is the better implementation of the utility model, in addition, all right alternate manner realization of the utility model, any apparent replacement is all within protection domain of the present utility model under the prerequisite that does not break away from the present utility model design.
Claims (6)
1. based on the light-duty bending resistance supporting member of FRP and flexible donor, comprise arch ring, presstressed reinforcing steel (1) and two arch springings (2), the two ends of arch ring are connected with the inboard of two arch springings (2) respectively, the two ends of described presstressed reinforcing steel (1) are fixedly connected with the bottom of two arch springings (2) respectively, it is characterized in that: described arch ring comprises sliding roadway arch band (3) and a plurality of FRP grid (4), these a plurality of FRP grids (4) are adjacent being set up in parallel in the soffit of described sliding roadway arch band (3) mutually, and the longitudinal section of each FRP grid (4) is isosceles trapezoid; Comprise that also the dismountable FRP of base plate (5) protects shell (6) outward, described arch ring, presstressed reinforcing steel (1) and two arch springings (2) all are positioned at FRP and protect shell (6) outward.
2. the light-duty bending resistance supporting member based on FRP and flexible donor according to claim 1, it is characterized in that: the FRP grid (4) that is positioned at described sliding roadway arch band (3) end is fixed with arch ring positioning key (7), and the other end of this arch ring positioning key (7) is fixedly connected with the inboard of arch springing (2).
3. the light-duty bending resistance supporting member based on FRP and flexible donor according to claim 1, it is characterized in that: the top that described FRP protects shell (6) outward is provided with a plurality of shear connectors (8).
4. the light-duty bending resistance supporting member based on FRP and flexible donor according to claim 1, it is characterized in that: sling with arch springing (2) described arch ring when being connected, the two ends of described sliding roadway arch band (3) are bent downwardly, the side of adjacent two FRP grids (4) mutually against.
5. the light-duty bending resistance supporting member based on FRP and flexible donor according to claim 1, it is characterized in that: the below of described arch ring is filled with foam-filled thing (9).
6. the light-duty bending resistance supporting member based on FRP and flexible donor according to claim 5, it is characterized in that: described FRP protects the interior fill concrete of shell (6) (10) outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320297530 CN203270436U (en) | 2013-05-28 | 2013-05-28 | Light anti-bending supporting member based on FRP and flexible arch body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320297530 CN203270436U (en) | 2013-05-28 | 2013-05-28 | Light anti-bending supporting member based on FRP and flexible arch body |
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| Publication Number | Publication Date |
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| CN203270436U true CN203270436U (en) | 2013-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320297530 Expired - Lifetime CN203270436U (en) | 2013-05-28 | 2013-05-28 | Light anti-bending supporting member based on FRP and flexible arch body |
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| CN (1) | CN203270436U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911988A (en) * | 2015-06-09 | 2015-09-16 | 中交第二公路勘察设计研究院有限公司 | Prefabricated reinforced concrete embedded type upright frame bridge |
| CN110468679A (en) * | 2019-08-26 | 2019-11-19 | 东南大学 | One kind string formula FRP pipe seawater coral aggregate concrete arch bridge structure and method of construction |
| CN113186795A (en) * | 2021-04-19 | 2021-07-30 | 甘肃建投科技研发有限公司 | Segmental precast concrete beam chord arch bridge |
-
2013
- 2013-05-28 CN CN 201320297530 patent/CN203270436U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911988A (en) * | 2015-06-09 | 2015-09-16 | 中交第二公路勘察设计研究院有限公司 | Prefabricated reinforced concrete embedded type upright frame bridge |
| CN110468679A (en) * | 2019-08-26 | 2019-11-19 | 东南大学 | One kind string formula FRP pipe seawater coral aggregate concrete arch bridge structure and method of construction |
| CN113186795A (en) * | 2021-04-19 | 2021-07-30 | 甘肃建投科技研发有限公司 | Segmental precast concrete beam chord arch bridge |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |
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| CX01 | Expiry of patent term |