CN102535743A - Unbonded prestressed steel concrete beam - Google Patents
Unbonded prestressed steel concrete beam Download PDFInfo
- Publication number
- CN102535743A CN102535743A CN2012100387941A CN201210038794A CN102535743A CN 102535743 A CN102535743 A CN 102535743A CN 2012100387941 A CN2012100387941 A CN 2012100387941A CN 201210038794 A CN201210038794 A CN 201210038794A CN 102535743 A CN102535743 A CN 102535743A
- Authority
- CN
- China
- Prior art keywords
- concrete beam
- concrete
- prestressing
- unbonded
- cased
- 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.)
- Granted
Links
Images
Landscapes
- Rod-Shaped Construction Members (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to a structural steel concrete beam, belonging to the field of civil engineering. The unbonded prestressed steel concrete beam comprises a concrete beam (1); the concrete beam (1) is internally provided with a non-prestressed bar (2); and a hooping bar (3) is bound and installed outside the non-prestressed bar (2). The unbonded prestressed steel concrete beam is characterized in that the non-prestressed bar (2) in the concrete beam (1) is internally provided with a transverse H-shaped steel (4); the lower side of the transverse H-shaped steel (4) passes through the concrete beam (1) and is provided with an unbonded prestressed bar (5); and the unbonded prestressed bar (5) is formed by coating an anti-corrosion lubrication material layer (8) on the external surface of a prestressed bar (7) in the length direction and then covering with a plastic sheath layer (9). The non-prestressed steel concrete beam disclosed by the invention does not need operations including reservation of ducts, penetration of bars, grouting after tensioning and the like, so that the construction process is greatly simplified; and when the structural steel concrete beam is used, the self-weight of the structure can be reduced, and strong anti-corrosion ability is strong and good operation performance are achieved.
Description
Technical field
The present invention relates to a kind of girder with rolled steel section en cased in concrete, relate 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 encased steel reinforced concrete; It has overcome that steel work is stable, fireproof performance difference and the reinforced concrete structure cross section is big, the characteristics of ductility difference; Be a kind of perfect adaptation of steel and steel concrete, in engineering, obtained extensive use.Yet owing to reducing of its member section size, under some situation that the rigidity of structure is had relatively high expectations, crack and Deformation control often are difficult to meet the demands.Therefore, the prestressing force steel reinforced concrete structure arises at the historic moment, and it is in steel reinforced concrete structure, to apply prestressing force, thereby improves the cracking resistance and the non-deformability of structure.As a kind of novel combination form of structure that has steel reinforced concrete structure and prestressed reinforced concrete construction concurrently, it have in large span, heavy duty and to the member section size be strict with and engineering field that shockproof requirements is high in the prospect that has a very wide range of applications.
What in the prestressing force steel reinforced concrete structure, generally adopt in recent years, is to carry out stretch-draw with bonded prestressed tendon.Because in work progress, need reserving hole channel, wear muscle, 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 prestressing force steel reinforced concrete structure in engineering from economically.
Summary of the invention
Technical problem to be solved by this invention provides a kind of prestressing without bondn girder with rolled steel section en cased in concrete; Solve in the present prestressing force 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 dangerous defects 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 said 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 said concrete beam; Pass concrete beam at the downside of i shaped steel and be provided with unbonded prestressing tendon, said unbonded prestressing tendon is behind the anticorrosion lubriation material layer of brushing on the presstressed reinforcing steel length external surface, the outer again plastic wrapper layer of wrapping.
Said unbonded prestressing tendon passes concrete beam, is fixed on the said concrete beam with anchor device.
Said i shaped steel is by the centre that is arranged symmetrically in said concrete beam cross section.
Said unbonded prestressing tendon is provided with two, is installed in the downside of i shaped steel and is drawn between the top of non-prestressing tendon.
Said anticorrosion lubriation material layer adopts pitch.
Said plastic wrapper layer adopts plastic paper or plastic bushing.
Beneficial effect
No prestressing force girder with rolled steel section en cased in concrete of the present invention 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, resistance to corrosion is strong; Functional performance is good simultaneously, has excellent economy and applicability.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a structural section sketch map of the present invention.
Fig. 3 is unbonded prestressing tendon sectional drawing in the structure of the present invention.
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 present invention.
Design the object of the present invention 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 big, construction is complicated, speed is slow, presstressed reinforcing steel is perishable, the shortcoming of distortion and ductility difference, be beneficial to the promotion and application of prestressing force girder with rolled steel section en cased in concrete in actual engineering.
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 said concrete beam 1, colligation is equipped with stirrup 3 outside non-prestressing tendon 2; Be provided with i shaped steel 4 within the non-prestressing tendon 2 in the said concrete beam 1; Pass concrete beam 1 at the downside of i shaped steel 4 and be provided with unbonded prestressing tendon 5, said unbonded prestressing tendon 5 is behind the anticorrosion lubriation material layer 8 of brushing on the presstressed reinforcing steel 7 length external surfaces, the outer again plastic wrapper layer 9 of wrapping.
Said unbonded prestressing tendon 5 passes concrete beam 1, is fixed on the said concrete beam 1 with anchor device 6.
Said i shaped steel 4 is by the centre that is arranged symmetrically in said concrete beam 1 cross section.
Said unbonded prestressing tendon 5 is provided with two, is installed in the downside of i shaped steel 4 and is drawn between the top of non-prestressing tendon 2.
Said anticorrosion lubriation material layer 8 adopts pitch.
Said plastic wrapper layer 9 adopts plastic paper or plastic bushing.
Structure of the present invention can realize in such a way: during construction, lay the beam bottom board plate, after the reinforcing checking; On bed die, fill up the support ironware of shaped steel, after i shaped steel 4 is installed, non-prestressing tendon 2 and stirrup 3 on the colligation beam; Wear unbonded prestressing tendon 5 then, then install beam side, fluid concrete; After treating that 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 finishes; With the fixing unbonded prestressing tendon 5 of anchor device 6, and carry out sealing protection, last stripping.Whole operation is easy to be clear, improves speed of application greatly.
This prestressing force girder with rolled steel section en cased in concrete is in the i shaped steel concrete beam, to adopt unbonded prestressing tendon 5 to carry out stretch-draw, confirms that through experimental study this structure can overcome the following shortcoming of existing bonded prestress girder with rolled steel section en cased in concrete:
(1) it is big to overcome dead load.Because adopt unbonded prestressing tendon, beam does not need reserving hole channel, reduces size, alleviates deadweight, help alleviating the load and reduction cost of lower support post.
(2) overcome the construction complicacy, speed is slow.During construction, unbonded prestressing tendon is laid in the template by designing requirement, and concreting is treated to carry out stretch-draw, anchoring, shutoff end after concrete reaches certain intensity then.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) it is perishable to overcome in the structure presstressed reinforcing steel.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 takes place.
(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 basically, makes the stress of unbonded tendon remain on elastic stage, and the energy dissipation ability of structure is guaranteed.
The present invention 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 and economic and applicability.
Claims (6)
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 said 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 said concrete beam (1), pass concrete beam (1) at the downside of i shaped steel (4) and be provided with unbonded prestressing tendon (5); Said unbonded prestressing tendon (5) is behind the anticorrosion lubriation material layer of brushing (8) on presstressed reinforcing steel (7) the length external surface, the outer again plastic wrapper layer (9) of wrapping.
2. prestressing without bondn girder with rolled steel section en cased in concrete as claimed in claim 1 is characterized in that: said unbonded prestressing tendon (5) passes concrete beam (1), is fixed on the said concrete beam (1) with anchor device (6).
3. according to claim 1 or claim 2 prestressing without bondn girder with rolled steel section en cased in concrete, it is characterized in that: said i shaped steel (4) is by the centre that is arranged symmetrically in said concrete beam (1) cross section.
4. according to claim 1 or claim 2 prestressing without bondn girder with rolled steel section en cased in concrete, it is characterized in that: said unbonded prestressing tendon (5) is provided with two, is installed in the downside of i shaped steel (4) and is drawn between the top of non-prestressing tendon (2).
5. prestressing without bondn girder with rolled steel section en cased in concrete as claimed in claim 1 is characterized in that: said anticorrosion lubriation material layer (8) adopts pitch.
6. prestressing without bondn girder with rolled steel section en cased in concrete as claimed in claim 1 is characterized in that: said plastic wrapper layer (9) adopts plastic paper or plastic bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210038794.1A CN102535743B (en) | 2012-02-20 | 2012-02-20 | Unbonded prestressed steel concrete beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210038794.1A CN102535743B (en) | 2012-02-20 | 2012-02-20 | Unbonded prestressed steel concrete beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102535743A true CN102535743A (en) | 2012-07-04 |
| CN102535743B CN102535743B (en) | 2014-08-13 |
Family
ID=46343639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210038794.1A Active CN102535743B (en) | 2012-02-20 | 2012-02-20 | Unbonded prestressed steel concrete beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102535743B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924737A (en) * | 2014-04-12 | 2014-07-16 | 北京工业大学 | Reinforced concrete columns with unbonded end parts and unequal strength |
| CN103924742A (en) * | 2014-04-11 | 2014-07-16 | 北京工业大学 | Reinforced concrete column with partial non-adhesive ends and preparation method thereof |
| CN103924729A (en) * | 2014-04-11 | 2014-07-16 | 北京工业大学 | Reinforced concrete beam with partial non-adhesive ends and preparation method thereof |
| CN103924731A (en) * | 2014-04-11 | 2014-07-16 | 北京工业大学 | Reinforced concrete beam with non-adhesive ends and preparation method thereof |
| CN103924736A (en) * | 2014-04-11 | 2014-07-16 | 北京工业大学 | Reinforced concrete column with non-adhesive ends and preparation method thereof |
| CN108360743A (en) * | 2018-05-09 | 2018-08-03 | 长沙理工大学 | Built-in H profile steel prestressed concrete beam and preparation method and beam sliding monitoring device and method |
| CN108517985A (en) * | 2018-05-30 | 2018-09-11 | 重庆建工集团股份有限公司 | A kind of prestressing without bondn steel reinforced concrete wall and its construction method |
| CN112942862A (en) * | 2021-02-03 | 2021-06-11 | 胡鹏 | Steel bar supporting device of prestressed concrete column |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066701A (en) * | 1992-07-01 | 1992-12-02 | 中国建筑科学研究院建筑结构研究所 | Prestressed concrete multi-span frame beam without binding unit |
| US20010046417A1 (en) * | 2000-04-11 | 2001-11-29 | Hirokazu Iemura | High-aseismic reinforced concrete pier using unbonded high-strength core member |
| CN2911057Y (en) * | 2006-03-16 | 2007-06-13 | 同济大学 | Concrete beam having partially bond prestressed FRP bars |
| CN201962850U (en) * | 2011-01-04 | 2011-09-07 | 山西省第三建筑工程公司 | Space unbonded prestressed ring beam |
| CN202882217U (en) * | 2012-09-26 | 2013-04-17 | 同济大学 | Unbonded prestressed steel reinforced concrete (SRC) beam |
-
2012
- 2012-02-20 CN CN201210038794.1A patent/CN102535743B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066701A (en) * | 1992-07-01 | 1992-12-02 | 中国建筑科学研究院建筑结构研究所 | Prestressed concrete multi-span frame beam without binding unit |
| US20010046417A1 (en) * | 2000-04-11 | 2001-11-29 | Hirokazu Iemura | High-aseismic reinforced concrete pier using unbonded high-strength core member |
| CN2911057Y (en) * | 2006-03-16 | 2007-06-13 | 同济大学 | Concrete beam having partially bond prestressed FRP bars |
| CN201962850U (en) * | 2011-01-04 | 2011-09-07 | 山西省第三建筑工程公司 | Space unbonded prestressed ring beam |
| CN202882217U (en) * | 2012-09-26 | 2013-04-17 | 同济大学 | Unbonded prestressed steel reinforced concrete (SRC) beam |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924742A (en) * | 2014-04-11 | 2014-07-16 | 北京工业大学 | Reinforced concrete column with partial non-adhesive ends and preparation method thereof |
| CN103924729A (en) * | 2014-04-11 | 2014-07-16 | 北京工业大学 | Reinforced concrete beam with partial non-adhesive ends and preparation method thereof |
| CN103924731A (en) * | 2014-04-11 | 2014-07-16 | 北京工业大学 | Reinforced concrete beam with non-adhesive ends and preparation method thereof |
| CN103924736A (en) * | 2014-04-11 | 2014-07-16 | 北京工业大学 | Reinforced concrete column with non-adhesive ends and preparation method thereof |
| CN103924731B (en) * | 2014-04-11 | 2016-08-17 | 北京工业大学 | End unbonded reinforcement beams of concrete and preparation method |
| CN103924736B (en) * | 2014-04-11 | 2016-08-17 | 北京工业大学 | End unbonded reinforcement concrete column and preparation method |
| CN103924729B (en) * | 2014-04-11 | 2016-10-26 | 北京工业大学 | End sections unbonded reinforcement beams of concrete and preparation method |
| CN103924742B (en) * | 2014-04-11 | 2016-10-26 | 北京工业大学 | End sections unbonded reinforcement concrete column and preparation method |
| CN103924737A (en) * | 2014-04-12 | 2014-07-16 | 北京工业大学 | Reinforced concrete columns with unbonded end parts and unequal strength |
| CN108360743A (en) * | 2018-05-09 | 2018-08-03 | 长沙理工大学 | Built-in H profile steel prestressed concrete beam and preparation method and beam sliding monitoring device and method |
| CN108517985A (en) * | 2018-05-30 | 2018-09-11 | 重庆建工集团股份有限公司 | A kind of prestressing without bondn steel reinforced concrete wall and its construction method |
| CN112942862A (en) * | 2021-02-03 | 2021-06-11 | 胡鹏 | Steel bar supporting device of prestressed concrete column |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102535743B (en) | 2014-08-13 |
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 | |
| CN102561591A (en) | Retarded adhesive prestressed steel reinforced concrete beam | |
| CN102966050B (en) | Longitudinal connection method for steel-concrete combined beam and existing reinforced concrete T beam | |
| CN103114524A (en) | Light type wave-shaped steel and high-strength activity powder concrete composite bridge panel | |
| CN104947588A (en) | Steel pipe concrete-combination beam cable stayed bridge floor system and construction method thereof | |
| CN103912133B (en) | Vierendeel girder transverse stretching pre-stressed carbon fiber sheet material reinforcement means | |
| CN109750791A (en) | A kind of assembled large overhanging steel structure | |
| CN103912132A (en) | Frame beam composite reinforcing method by transversely tensioning prestress carbon fiber cloth and steel | |
| CN101994291A (en) | Process for applying prestress on steel-concrete combined continuous beam | |
| CN102852276A (en) | Large-tonnage prestressed superposed crane beam and construction method | |
| CN101838971A (en) | Construction method for carrying out external prestressing strengthening on bridge by transverse tensioning method | |
| CN103195260B (en) | A kind ofly ensure the ruggedized construction that New And Old Concrete Structures is jointly stressed and construction method thereof | |
| CN102808371B (en) | The integral precast overlapping Continuous Bridge of a kind of simple-supported thencontinuous and construction method | |
| CN104806031B (en) | Timber structure reinforced construction method | |
| CN105544415A (en) | Concrete bridge reinforcing method and structure | |
| CN204960289U (en) | Builder's jack is encorbelmented whole combination of girder steel and can be had enough to meet need anchor assembly | |
| CN202882217U (en) | Unbonded prestressed steel reinforced concrete (SRC) beam | |
| JP5182929B2 (en) | Reinforcing method for existing concrete structures | |
| CN202047353U (en) | Concrete bridge body of expressway or railway and prestressed concrete continuous box girder | |
| CN103061452B (en) | Anti-seismic prestressed precast beam | |
| KR101356675B1 (en) | Structural girder using a loading anchor system for girder | |
| CN109537478B (en) | Shear-resisting reinforcing device and method for concrete box girder web | |
| CN101962975A (en) | Novel prestressed steel pipe-concrete composite beam | |
| CN206693469U (en) | A kind of precast floor slab connecting node |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |