CN202882217U - Unbonded prestressed steel reinforced concrete (SRC) beam - Google Patents
Unbonded prestressed steel reinforced concrete (SRC) beam Download PDFInfo
- Publication number
- CN202882217U CN202882217U CN 201220497467 CN201220497467U CN202882217U CN 202882217 U CN202882217 U CN 202882217U CN 201220497467 CN201220497467 CN 201220497467 CN 201220497467 U CN201220497467 U CN 201220497467U CN 202882217 U CN202882217 U CN 202882217U
- Authority
- CN
- China
- Prior art keywords
- concrete
- prestressing
- src
- unbonded
- concrete beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Rod-Shaped Construction Members (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The utility model relates to a steel reinforced concrete (SRC) beam, belonging to the field of civil engineering. The unbonded prestressed SRC beam comprises a concrete beam, wherein non-prestressed tendons are arranged in the concrete beam; and stirrups are bound outside the non-prestressed tendons. The SRC beam is characterized in that I steel is arranged in the non-prestressed tendons in the concrete beam; and unbonded prestressed tendons are arranged below the I steel by passing through the concrete beam and are formed by painting anticorrosion lubricating material layers on longitudinal outer surfaces of prestressed tendons and then covering the anticorrosion lubricating material layers with plastic jacket layers. The unbonded prestressed SRC beam has the beneficial effects that the procedures of reserving hole passages, penetrating tendons, grouting after tensioning and the like are not needed in the construction process of the unbonded prestressed SRC beam, thus greatly simplifying the construction technology; in the use process of the unbonded prestressed SRC beam, the dead load can be reduced; and the unbonded prestressed SRC beam has strong corrosion resistance and simultaneously has good usability.
Description
Technical field
The utility model relates to a kind of girder with rolled steel section en cased in concrete, relates in particular to a kind of prestressing without bondn girder with rolled steel section en cased in concrete.
Background technology
Steel reinforced concrete structure is a kind of combining structure of shaped steel reinforced concrete enveloped, it has overcome the characteristics that steel work is stable, fireproof performance is poor and the reinforced concrete structure cross section is large, ductility is poor, be a kind of perfect adaptation of steel and steel concrete, in engineering, be widely applied.Yet owing to reducing of its sectional dimension of members, in the situation that some are had relatively high expectations to the rigidity of structure, crack and Deformation control often are difficult to meet the demands.Therefore, the prestressed steel reinforced concrete structure is arisen at the historic moment, and it is to apply prestressing force in steel reinforced concrete structure, thereby improves cracking resistance and the non-deformability of structure.As a kind of new composite structure form that has steel reinforced concrete structure and prestressed reinforced concrete construction concurrently, it have in large span, heavy duty and to sectional dimension of members be strict with and engineering field that shockproof requirements is high in the prospect that has a very wide range of applications.
What generally adopt in the prestressed steel reinforced concrete structure in recent years, is to carry out stretch-draw with bonded prestressed tendon.Because in work progress, need reserving hole channel, wear muscle, the operation such as grouting, this causes, and construction is complicated, speed is slow, and the easy corrosion of presstressed reinforcing steel so that the danger of fracture of wire is arranged.These defectives with technical, have hindered the promotion and application of prestressed steel reinforced concrete structure in engineering from economically.
The utility model content
Technical problem to be solved in the utility model provides a kind of prestressing without bondn girder with rolled steel section en cased in concrete, solve in the present prestressed steel reinforced concrete structure and to adopt that the bonded prestressed tendon construction is complicated, speed is slow, and the easy corrosion of presstressed reinforcing steel so that the defective of the danger of fracture of wire is arranged.
Technical scheme
A kind of prestressing without bondn girder with rolled steel section en cased in concrete, comprise concrete beam, be provided with non-prestressing tendon in the described concrete beam, colligation is equipped with stirrup outside non-prestressing tendon, it is characterized in that: be provided with i shaped steel within the non-prestressing tendon in the described concrete beam, pass concrete beam at the downside of i shaped steel and be provided with unbonded prestressing tendon, described unbonded prestressing tendon is behind the anticorrosion lubriation material layer of presstressed reinforcing steel length external surface brushing, the outer plastic wrapper layer of wrapping; Described unbonded prestressing tendon passes concrete beam, is fixed on the described concrete beam with anchor device.
Described i shaped steel is by the centre that is arranged symmetrically in described concrete beam cross section.
Described unbonded prestressing tendon is provided with two, is installed between the top of the downside of i shaped steel and tension non-prestressing tendon.
Described anticorrosion lubriation material layer adopts pitch.
Described plastic wrapper layer adopts plastic paper or plastic bushing.
Beneficial effect
Of the present utility modelly in work progress, do not need reserving hole channel, wear muscle and stretch-draw post-grouting etc. without the prestressed steel reinforced concrete beam, greatly simplified construction technology, in use can alleviate dead load, resistance to corrosion is strong, functional performance is good simultaneously, has good economy and applicability.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model structural section schematic diagram.
Fig. 3 is unbonded prestressing tendon sectional drawing in the utility model structure.
Wherein: 1-concrete beam, 2-non-prestressing tendon, 3-stirrup, 4-i shaped steel, 5-unbonded prestressing tendon, 6-anchor device, 7-prestressed reinforcement, the anticorrosion lubriation material layer of 8-, 9-plastic wrapper layer.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the utility model.
The design the purpose of this utility model is to provide a kind of prestressing without bondn girder with rolled steel section en cased in concrete, overcome that existing bonded prestress girder with rolled steel section en cased in concrete dead load is large, construction is complicated, speed is slow, presstressed reinforcing steel is perishable, distortion and the poor shortcoming of ductility, be beneficial to the promotion and application of prestressed steel reinforced concrete beam in Practical Project.
A kind of prestressing without bondn girder with rolled steel section en cased in concrete, comprise concrete beam 1, be provided with non-prestressing tendon 2 in the described concrete beam 1, in non-prestressing tendon 2 outer colligations stirrup 3 is installed, be provided with i shaped steel 4 within the non-prestressing tendon 2 in the described concrete beam 1, pass concrete beam 1 at the downside of i shaped steel 4 and be provided with unbonded prestressing tendon 5, described unbonded prestressing tendon 5 is behind the anticorrosion lubriation material layer 8 of presstressed reinforcing steel 7 length external surfaces brushing, the outer plastic wrapper layer 9 of wrapping.Described unbonded prestressing tendon 5 passes concrete beam 1, is fixed on the described concrete beam 1 with anchor device 6.
Described i shaped steel 4 is by the centre that is arranged symmetrically in described concrete beam 1 cross section.
Described unbonded prestressing tendon 5 is provided with two, is installed between the top of the downside of i shaped steel 4 and tension non-prestressing tendon 2.
Described anticorrosion lubriation material layer 8 adopts pitch.
Described plastic wrapper layer 9 adopts plastic paper or plastic bushing.
The utility model structure can realize in such a way: during construction, lay beam bottom mother plate, after reinforcing checking, support ironware at bed die pad shaped steel, after i shaped steel 4 installed, non-prestressing tendon 2 and stirrup 3 on the colligation beam, then wear unbonded prestressing tendon 5, then install beam side, fluid concrete, after concrete reaches certain intensity (be not less than design strength 75%), adopt jack pair unbonded prestressing tendon 5 to carry out stretch-draw, after stretch-draw is complete, use fixedly unbonded prestressing tendon 5 of anchor device 6, and carry out sealing protection, last stripping.Whole operation is easy to be clear, greatly improves speed of application.
This prestressed steel reinforced concrete beam is to adopt unbonded prestressing tendon 5 to carry out stretch-draw in the i shaped steel concrete beam, confirms by experimental study, and this structure can overcome the following shortcoming of existing bonded prestress girder with rolled steel section en cased in concrete:
(1) overcomes dead load large.Because adopt unbonded prestressing tendon, beam does not need reserving hole channel, reduces size, alleviates deadweight, be conducive to alleviate the load of lower support post and reduce cost.
(2) overcome the construction complexity, speed is slow.During construction, unbonded prestressing tendon is laid in the template by designing requirement, and then concreting carries out stretch-draw, anchoring, shutoff end after concrete reaches some strength.The complicated procedures of forming such as it need not reserving hole channel, wear muscle, grouting have been simplified construction technology, have accelerated construction speed.
(3) overcome in the structure presstressed reinforcing steel perishable.Because the unbonded prestressing tendon bundle scribbles anticorrosion grease, and the outsourcing plastic bushing, has dual antiseptic power, reduce the danger that fracture of wire occurs.
(4) overcome the distortion and ductility poor.Because there are not line compatibility of deformation relation in unbonded prestressing tendon and surrounding concrete, its stress evenly distributes along total length substantially, makes the stress of unbonded tendon remain on elastic stage, and the energy dissipation ability of structure is guaranteed.
The utility model does not need reserving hole channel, wears muscle and stretch-draw post-grouting etc. in work progress, greatly simplified construction technology, in use can alleviate dead load, and functional performance is good, has good economy and applicability.
Claims (5)
1. prestressing without bondn girder with rolled steel section en cased in concrete, comprise concrete beam (1), be provided with non-prestressing tendon (2) in the described concrete beam (1), colligation is equipped with stirrup (3) outside non-prestressing tendon (2), it is characterized in that: be provided with i shaped steel (4) within the non-prestressing tendon (2) in the described concrete beam (1), pass concrete beam (1) at the downside of i shaped steel (4) and be provided with unbonded prestressing tendon (5), described unbonded prestressing tendon (5) is behind presstressed reinforcing steel (7) the length external surface anticorrosion lubriation material layer of brushing (8), the outer plastic wrapper layer (9) of wrapping; Described unbonded prestressing tendon (5) passes concrete beam (1), is fixed on the described concrete beam (1) with anchor device (6).
2. prestressing without bondn girder with rolled steel section en cased in concrete as claimed in claim 1, it is characterized in that: described i shaped steel (4) is by the centre that is arranged symmetrically in described concrete beam (1) cross section.
3. prestressing without bondn girder with rolled steel section en cased in concrete as claimed in claim 1, it is characterized in that: described unbonded prestressing tendon (5) is provided with two, is installed between the top of the downside of i shaped steel (4) and tension non-prestressing tendon (2).
4. prestressing without bondn girder with rolled steel section en cased in concrete as claimed in claim 1 is characterized in that: described anticorrosion lubriation material layer (8) employing pitch.
5. prestressing without bondn girder with rolled steel section en cased in concrete as claimed in claim 1 is characterized in that: described plastic wrapper layer (9) employing plastic paper or plastic bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220497467 CN202882217U (en) | 2012-09-26 | 2012-09-26 | Unbonded prestressed steel reinforced concrete (SRC) beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220497467 CN202882217U (en) | 2012-09-26 | 2012-09-26 | Unbonded prestressed steel reinforced concrete (SRC) beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202882217U true CN202882217U (en) | 2013-04-17 |
Family
ID=48073658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220497467 Expired - Fee Related CN202882217U (en) | 2012-09-26 | 2012-09-26 | Unbonded prestressed steel reinforced concrete (SRC) beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202882217U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535743A (en) * | 2012-02-20 | 2012-07-04 | 同济大学 | Unbonded prestressed steel concrete beam |
| CN103924728A (en) * | 2014-04-12 | 2014-07-16 | 北京工业大学 | End unbonded reinforced concrete beam with non-equal strengths |
-
2012
- 2012-09-26 CN CN 201220497467 patent/CN202882217U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535743A (en) * | 2012-02-20 | 2012-07-04 | 同济大学 | Unbonded prestressed steel concrete beam |
| CN102535743B (en) * | 2012-02-20 | 2014-08-13 | 同济大学 | Unbonded prestressed steel concrete beam |
| CN103924728A (en) * | 2014-04-12 | 2014-07-16 | 北京工业大学 | End unbonded reinforced concrete beam with non-equal strengths |
| CN103924728B (en) * | 2014-04-12 | 2016-08-17 | 北京工业大学 | End soap-free emulsion polymeization variable strength reinforced beam |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102535743B (en) | Unbonded prestressed steel concrete beam | |
| CN201746774U (en) | Cable-stayed bridge cable tower anchorage zone steel bracket with assembled anchoring device | |
| CN203007856U (en) | External prestressing reinforcement system for hollow slab girder bridge | |
| CN103912132B (en) | The method of transverse stretching prestressed carbon cloth and steel composite consolidation Vierendeel girder | |
| CN102561591A (en) | Retarded adhesive prestressed steel reinforced concrete beam | |
| CN204081079U (en) | A kind of structure of open pore steel plate shear force | |
| CN103912133B (en) | Vierendeel girder transverse stretching pre-stressed carbon fiber sheet material reinforcement means | |
| CN104631836A (en) | Post-tensioning-method retard-bonded pre-stress cast-in-place concrete construction method | |
| CN202882217U (en) | Unbonded prestressed steel reinforced concrete (SRC) beam | |
| CN103306495B (en) | Wooden construction truncated cylinder reinforced construction method | |
| CN203065973U (en) | Stretch-draw device for monofilament epoxy coating steel strands | |
| CN205501848U (en) | Box -girder bridge girder web oblique segmentation seam reinforced structure | |
| CN202882219U (en) | Retard-bonded prestressed hollow steel reinforced concrete (SRC) beam | |
| CN202882218U (en) | Retard-bonded prestressed steel reinforced concrete (SRC) beam | |
| CN102704352B (en) | Prestressed concrete slab reinforcement structure for high-speed railway | |
| CN204185854U (en) | Based on the recyclable steel strand abnormity soldier pile of prestressing technique | |
| CN103147412A (en) | Carbon-fiber-reinforcement external pre-stressing tension anchor device and anchoring method | |
| CN103924685B (en) | Prestress connected concrete beam round steel tube concrete column node | |
| CN202273454U (en) | Limited part prestressed concrete electric pole | |
| CN202144578U (en) | Box girder base plate external anchoring structure for external prestress reinforcement of T-shaped steel structured bridge | |
| CN202116988U (en) | Anchor fixing structure in external prestressed reinforcing T-shaped rigid frame bridge box girder | |
| CN207974555U (en) | A kind of building structure strengthening device | |
| CN202416701U (en) | Combined pre-stressed concrete beam with binder and no binder | |
| CN201424751Y (en) | Steel plate concrete beam component | |
| CN201826439U (en) | Assembled self-compaction steel tube concrete combined structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20130926 |