CN102535743B - Unbonded prestressed steel concrete beam - Google Patents
Unbonded prestressed steel concrete beam Download PDFInfo
- Publication number
- CN102535743B CN102535743B CN201210038794.1A CN201210038794A CN102535743B CN 102535743 B CN102535743 B CN 102535743B CN 201210038794 A CN201210038794 A CN 201210038794A CN 102535743 B CN102535743 B CN 102535743B
- Authority
- CN
- China
- Prior art keywords
- concrete beam
- prestressed
- prestressing tendon
- unbonded
- concrete
- 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.)
- Active
Links
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 reinforced concrete enveloped, it has overcome the feature that steel work is stable, fireproof performance is poor and 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.But due to the 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 are often difficult to meet the demands.Therefore, prestressed steel reinforced concrete structure is arisen at the historic moment, and it is in steel reinforced concrete structure, to apply prestressing force, 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 in large span, heavy duty and sectional dimension of members is had be strict with and the high engineering field of shockproof requirements in the prospect that has a very wide range of applications.
What in prestressed steel reinforced concrete structure, generally adopt in recent years, is to carry out stretch-draw with bonded prestressed tendon.Due in work progress, need reserving hole channel, wear the operation such as muscle, grouting, this causes, and construction is complicated, speed is slow, and the easy corrosion of presstressed reinforcing steel consequently has the danger of fracture of wire.These defects with technical, have hindered the promotion and application of prestressed steel reinforced concrete structure in engineering from economically.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of prestressing without bondn girder with rolled steel section en cased in concrete, solve and in present prestressed steel reinforced concrete structure, adopt that bonded prestressed tendon construction is complicated, speed is slow, and the easy corrosion of presstressed reinforcing steel so that have the dangerous defect of fracture of wire.
Technical scheme
A kind of prestressing without bondn girder with rolled steel section en cased in concrete, comprise concrete beam, in described concrete beam, be provided with non-prestressing tendon, outside non-prestressing tendon, colligation is provided with stirrup, it is characterized in that: within the non-prestressing tendon in described concrete beam, be provided with i shaped steel, downside at i shaped steel is provided with unbonded prestressing tendon through concrete beam, and described unbonded prestressing tendon for to brush after anticorrosion lubriation material layer on presstressed reinforcing steel length external surface, the outer plastic wrapper layer of wrapping.
Described unbonded prestressing tendon, through concrete beam, is fixed on 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 arranged between the downside of i shaped steel and the top of 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 inventionly in work progress, do not need reserving hole channel without prestressed steel reinforced concrete beam, wear muscle and stretch-draw post-grouting etc., 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.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is structural section schematic diagram of the present invention.
Fig. 3 is unbonded prestressing tendon sectional drawing in 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.
Detailed description of the invention
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 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, in described concrete beam 1, be provided with non-prestressing tendon 2, in the outer colligation of non-prestressing tendon 2, stirrup 3 is installed, within non-prestressing tendon 2 in described concrete beam 1, be provided with i shaped steel 4, downside at i shaped steel 4 is provided with unbonded prestressing tendon 5 through concrete beam 1, and described unbonded prestressing tendon 5 for to brush after anticorrosion lubriation material layer 8 on presstressed reinforcing steel 7 length external surfaces, the outer plastic wrapper layer 9 of wrapping.
Described unbonded prestressing tendon 5, through concrete beam 1, is fixed on 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 arranged between the downside of i shaped steel 4 and the top of tension non-prestressing tendon 2.
Described anticorrosion lubriation material layer 8 adopts pitch.
Described plastic wrapper layer 9 adopts plastic paper or plastic bushing.
Structure of the present invention can realize in such a way: when construction, lay beam bottom mother plate, reinforce after checking, on bed die, pad the support ironware of shaped steel, after i shaped steel 4 is installed, non-prestressing tendon 2 and stirrup 3 on 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, 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, greatly improves speed of application.
This prestressed steel reinforced concrete beam is in i shaped steel concrete beam, to adopt unbonded prestressing tendon 5 to carry out stretch-draw, 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) overcome dead load large.Owing to adopting unbonded prestressing tendon, beam does not need reserving hole channel, reduces size, alleviates deadweight, is conducive to alleviate the load of lower support post and reduces cost.
(2) overcome construction complexity, speed is slow.When construction, unbonded prestressing tendon is laid in template by designing requirement, and then concreting carries out stretch-draw, anchoring, shutoff end after concrete reaches some strength.It without reserving hole channel, wear the complicated procedures of forming such as muscle, grouting, simplified construction technology, accelerated construction speed.
(3) overcome in structure presstressed reinforcing steel perishable.Because unbonded prestressing tendon bundle scribbles anticorrosion grease, and outsourcing plastic bushing, there is dual antiseptic power, reduce the danger that fracture of wire occurs.
(4) overcome distortion and ductility poor.Because unbonded prestressing tendon and surrounding concrete do not exist line compatibility of deformation relation, its stress is uniformly distributed along total length substantially, 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, has greatly simplified construction technology, in use can alleviate dead load, and functional performance is good, has good economy and applicability.
Claims (3)
1. a prestressing without bondn girder with rolled steel section en cased in concrete, in described concrete beam (1), be provided with non-prestressing tendon (2), outside non-prestressing tendon (2), colligation is provided with stirrup (3), it is characterized in that: within the non-prestressing tendon (2) in described concrete beam (1), be provided with i shaped steel (4), downside at i shaped steel (4) is provided with unbonded prestressing tendon (5) through concrete beam (1), described unbonded prestressing tendon (5) for to brush after anticorrosion lubriation material layer (8) on presstressed reinforcing steel (7) length external surface, the outer plastic wrapper layer (9) of wrapping again, 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, be arranged between the downside of i shaped steel (4) and the top of tension non-prestressing tendon (2), described unbonded prestressing tendon (5) is through concrete beam (1), be fixed on 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, is characterized in that: described anticorrosion lubriation material layer (8) adopts pitch.
3. 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) 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 CN102535743A (en) | 2012-07-04 |
| CN102535743B true 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) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924731B (en) * | 2014-04-11 | 2016-08-17 | 北京工业大学 | End unbonded reinforcement beams of concrete 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 |
| CN103924736B (en) * | 2014-04-11 | 2016-08-17 | 北京工业大学 | End unbonded reinforcement concrete column and preparation method |
| CN103924737B (en) * | 2014-04-12 | 2016-05-18 | 北京工业大学 | End is without bonding variable strength reinforced column |
| 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 |
| CN112942862B (en) * | 2021-02-03 | 2022-09-20 | 安徽华升项目管理有限公司 | Steel bar supporting device of prestressed concrete column |
Citations (4)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3418726B2 (en) * | 2000-04-11 | 2003-06-23 | 京都大学長 | High seismic performance RC pier with unbonded high strength core material |
-
2012
- 2012-02-20 CN CN201210038794.1A patent/CN102535743B/en active Active
Patent Citations (4)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102535743A (en) | 2012-07-04 |
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 | |
| CN101982629B (en) | Assembly-type self-compaction steel tube and concrete composite structure | |
| CN203007856U (en) | External prestressing reinforcement system for hollow slab girder bridge | |
| CN103114524A (en) | Light type wave-shaped steel and high-strength activity powder concrete composite bridge panel | |
| CN102561591A (en) | Retarded adhesive prestressed steel reinforced concrete beam | |
| 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 | |
| CN108660908A (en) | A kind of prestressed concrete cable-stayed bridge of the beam prefabricated pin-connected panel of tower | |
| CN105544415A (en) | Concrete bridge reinforcing method and structure | |
| CN103912132A (en) | Frame beam composite reinforcing method by transversely tensioning prestress carbon fiber cloth and steel | |
| CN203783176U (en) | Carbon fiber sheet reinforced structure for transverse tensioning prestress of frame beam | |
| 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 | |
| JP5716117B1 (en) | Hinge reinforcement method and reinforcement structure for existing girder bridge | |
| CN103306495B (en) | Wooden construction truncated cylinder reinforced construction method | |
| CN202047353U (en) | Concrete bridge body of expressway or railway and prestressed concrete continuous box girder | |
| KR101356675B1 (en) | Structural girder using a loading anchor system for girder | |
| CN109537478B (en) | Shear-resisting reinforcing device and method for concrete box girder web | |
| CN106592451B (en) | A kind of Arch Bridges Strengthening device and method | |
| CN205934749U (en) | External prestress reinforced structure of assembled T type roof beam | |
| CN205421992U (en) | Floor reinforced structure that bearing capacity is not enough | |
| CN202882218U (en) | Retard-bonded prestressed steel reinforced concrete (SRC) beam | |
| CN103924685B (en) | Prestress connected concrete beam round steel tube concrete column node | |
| CN201424751Y (en) | Steel plate concrete beam component |
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 |