CN102852279A - Prestressed reinforced concrete superposed beam having convex-concave superposed surfaces - Google Patents
Prestressed reinforced concrete superposed beam having convex-concave superposed surfaces Download PDFInfo
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- CN102852279A CN102852279A CN2012102914520A CN201210291452A CN102852279A CN 102852279 A CN102852279 A CN 102852279A CN 2012102914520 A CN2012102914520 A CN 2012102914520A CN 201210291452 A CN201210291452 A CN 201210291452A CN 102852279 A CN102852279 A CN 102852279A
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Abstract
The invention discloses a prestressed reinforced concrete superposed beam having convex-concave superposed surfaces. The prestressed reinforced concrete superposed beam having convex-concave superposed surfaces comprises an inverted T-shaped precast prestressed beam and an inverted U-shaped post-poured reinforced concrete part. The inverted T-shaped precast prestressed beam and the inverted U-shaped post-poured reinforced concrete part compose a rectangular structure or a rectangular superposed beam of which an upper part is connected to a floor. The prestressed reinforced concrete superposed beam having convex-concave superposed surfaces is characterized in that prestressed steel strands are longitudinally embedded in the inverted T-shaped precast prestressed beam; U-shaped stirrups are embedded in flanges of the inverted T-shaped precast prestressed beam; rectangular stirrups are embedded in a web; a stirrup pouring anchor is fixed in the inverted U-shaped post-poured reinforced concrete part; and the rebars are longitudinally embedded in an upper part of the inverted U-shaped post-poured reinforced concrete part of the prestressed reinforced concrete superposed beam. The prestressed reinforced concrete superposed beam has an inverted T-shaped cross section and small self-weight, is convenient for transport and reduces tower crane hoisting requirements.
Description
Technical field
The present invention relates to a kind of reinforced concrete beam, relate in particular to a kind of superposed beam of integral precast.
Background technology:
In integral precast structural system, a kind of prefabricated girder be used to shelving prefabricated secondary beam adopts the square-section usually, precast beam is from great, and the lower rebar of secondary beam will stretch into and must adopt the measures such as reserved joint bar or reserved opening to solve in the girder, and the joint structure of beam is complicated, and for easy for installation, must stay on the secondary beam to establish to shelve and take the lead, gap between primary-secondary beam connects fills with newly that the section normal section shear resistance of concrete is poor, and globality is also relatively relatively poor, and construction is inconvenience also.A kind of secondary beam is shelved conveniently, and the girder that invertible T-shaped precast beam is overlapped into rectangular beam has no report.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiency of above-mentioned prior art, and a kind of prestressed reinforced concrete superposed beam of the convex-concave superposed surfaces from heavy and light is provided
According to the prestressed reinforced concrete superposed beam of a kind of convex-concave superposed surfaces provided by the invention, comprise inverted T-shaped precast-prestressed precast beam body and
Water the steel bar concrete part after the shape, the two composition rectangle or top connect the rectangle superposed beam of floor, it is characterized in that described precast beam body vertically is embedded with prestress wire, be embedded with stirrup on the bottom flange of described precast beam body, be embedded with rectangle hoop on the web of described precast beam body, described stirrup inserts to be anchored in and waters in the steel bar concrete part after described, and the top of watering the steel bar concrete part after described vertically is embedded with reinforcing bar.
Prestressed reinforced concrete superposed beam according to a kind of convex-concave superposed surfaces provided by the invention also has following attached technical characterictic:
At least one side is associated with some perpendicular to the prefabricated superimposed secondary beam of described precast beam body, and the pre-erection of described secondary beam stretches into and waters steel bar concrete part certain depth after described, and the pre-erection of described secondary beam is positioned on the edge of a wing of described precast beam body.
Longitudinally bury at least one U-shaped between the edge of a wing of described secondary beam and precast beam body underground and hang muscle, the described muscle that hangs anchors into and waters after described in the steel bar concrete part.
Can be U-shaped when stirrup is prefabricated on the edge of a wing of described precast beam body before colligation superposed beam upper reinforcement, its right angle, upper end bending forms the enclosed type stirrup.
Longitudinally leave through hole on the web of described precast beam body, be installed with the reinforcing bar of TBE (threaded both ends) on the described through hole, described reinforcing bar stretches out the beam sides certain-length.
The edge of a wing, the two ends upper surface of described precast beam body is buried additional bar underground, and described additional bar is imbedded and watered certain-length in the steel bar concrete part after described, and the other end of described additional bar stretches out the beam-ends face and stretches in the outside column concrete.
Water after described that the end of steel bar concrete part is embedding a bent-up bar, described bent-up bar is positioned at top, the edge of a wing and the setting of web bilateral symmetry of described precast beam body, anchors in the outside column on the described bent-up bar.
The web side of described precast beam body and edge of a wing upper surface are processed into crude.
Invertible T-shaped precast beam secondary beam lay-down location web bottom is provided with through hole, and the secondary beam lower rebar is passed through hole and imbedded in the rear pouring concrete.
Invertible T-shaped precast beam secondary beam lay-down location web lower, transverse is embedded with tension rib, and secondary beam lower rebar and drawknot overlap joint are imbedded in the rear pouring concrete.
Prestressed reinforced concrete superposed beam according to a kind of convex-concave superposed surfaces provided by the invention compared with prior art has following advantage:
1, precast beam adopts the inverted T-shaped cross section, and from heavy and light, hoisting transportation is convenient, has reduced the requirement to the tower crane elevating capacity.
2, can directly shelve secondary beam on the step of invertible T-shaped precast beam, the secondary beam beam-ends can directly stretch in the superimposed girder, the superimposed rear good integrity of primary-secondary beam, and the old and new's concrete bonding surface shear resistance of primary-secondary beam is strong.
3, the girder after superimposed is the square-section, and shear resistance is strong, and bending rigidity is large, and horizontal superposed surfaces area is large, and the shear bond strength performance is good.
4, because having saved node template construction between the Liang Yuliang, girder overlapping layers side form formwork is convenient, and joint is attractive in appearance between beam.
5, place the additional muscle of cracking resistance on the step of the inherent beam end of cast-in-place overlapping layers, can solve the beam basal crack and occur ahead of time and the excessive problem of crack width, increase simultaneously the energy-dissipating property in " plastic hinge " district, improve the anti-seismic performance of frame construction.
Description of drawings
Fig. 1 is precast beam stereogram of the present invention.
Fig. 2 is precast beam arrangement of reinforcement of the present invention.
Fig. 3 is superimposed rear arrangement of reinforcement of the present invention and beam column interface chart.
Fig. 4 is the sectional reinforcement figure of precast beam body of the present invention.
Fig. 5 is the sectional drawing of superposed beam of the present invention.
Fig. 6 is the sectional reinforcement figure of superimposed rear beam-ends of the present invention.
Fig. 7 is secondary beam of the present invention and girder node diagram one
Fig. 8 is secondary beam of the present invention and girder node diagram two
The specific embodiment
Referring to Fig. 1 to Fig. 6, the embodiment of the prestressed reinforced concrete superposed beam of a kind of convex-concave superposed surfaces that provides in the present invention comprises prestressed precast beam body 1 He of inverted T-shaped
Water steel bar concrete part 2 after the shape, the two composition rectangle or top connect the rectangle superposed beam of floor, described precast beam body 1 vertically is embedded with prestress wire 3, be embedded with stirrup 31 on the edge of a wing 11 of described precast beam body 1, be embedded with rectangle hoop 32 on the web 12 of described precast beam body 1, described stirrup 31 and rectangle hoop 32 are anchored in and water in the steel bar concrete part 2 after described, and the top of watering steel bar concrete part 2 after described vertically is embedded with reinforcing bar 33.Superposed beam of the present invention adopts the prestressed precast beam body 1 of inverted T-shaped and forms at precast beam body 1 upper
Water steel bar concrete part 2 after the shape, the stirrup 31 that arranges on the edge of a wing 11 of precast beam body 1 and the rectangle hoop 32 that arranges on web is connected so that precast beam body 1 and after to water 2 connections of steel bar concrete part more firm, improved the overall performance of superposed beam.The present invention adopts the invertible T-shaped precast beam body can reduce the weight of pre-erection, makes things convenient for transportation and the lifting of pre-erection, makes things convenient for simultaneously secondary beam to shelve temporarily.
Referring to Fig. 3, in above-described embodiment that the present invention provides, at least one side is associated with some perpendicular to the prefabricated superimposed secondary beam 4 of described precast beam body 1, the pre-erection end of described secondary beam 4 is stretched into and is watered steel bar concrete part 2 certain depths after described, and the pre-erection of described secondary beam 4 is positioned on the edge of a wing 11 of described precast beam body 1.The end of the superimposed secondary beam 4 among the present invention can be shelved on the edge of a wing 11 of precast beam body 1, and the effect of support is played on the edge of a wing 11 of precast beam body 1, convenient lifting.Said structure of the present invention makes things convenient for being connected between superposed beam and the superimposed secondary beam, consists of an integral precast system.
Referring to Fig. 2 and Fig. 3, in above-described embodiment that the present invention provides, vertically to bury at least one U-shaped underground on 11 on the edge of a wing of described secondary beam 4 and precast beam body 1 and hang muscle 34, the described muscle 34 of hanging inserts and waters in the steel bar concrete part 2 after described.The present invention arranges U-shaped and hangs muscle 34 for improving both shear behaviors in this junction between secondary beam 4 and precast beam body 1.The magnitude setting that U-shaped hangs muscle 34 can be one and also can be many.
Referring to Fig. 1 and Fig. 4, in above-described embodiment that the present invention provides, the stirrup 31 on the edge of a wing 11 of described precast beam body 1 is before colligation superposed beam upper reinforcement, and its right angle, upper end bending forms the enclosed type stirrup.Making first U-shaped when prefabricated is for precast beam formwork convenience.
Referring to Fig. 1 to Fig. 3, in above-described embodiment that the present invention provides, longitudinally leave through hole 13 on the web 12 of precast beam body 1, be installed with the reinforcing bar of TBE (threaded both ends) on the described through hole 13, described reinforcing bar stretches out the beam sides certain-length.This reinforcing bar is used for the beam side construction, also this reinforcing bar can be extracted out during form removal and reuse.
Referring to Fig. 1 to Fig. 6, in above-described embodiment that the present invention provides, the edge of a wing, two ends 11 upper surfaces of described precast beam body 1 are buried additional bar 35 underground, described additional bar 35 is imbedded and is watered certain-length in the steel bar concrete part 2 after described, and the other end of described additional bar 35 stretches out the beam-ends face and inserts in the outside column concrete.Described additional bar 35 is used for preventing that beam-ends from ftractureing ahead of time under positive bending moment effect, improve simultaneously the energy-dissipating property of beam-ends " plasticity strand ".
Referring to Fig. 1 to Fig. 3, in above-described embodiment that the present invention provides, water after described that the end of steel bar concrete part 2 is embedding a bent-up bar 36, described bent-up bar 36 is positioned at 11 tops, the edge of a wing and the web 12 bilateral symmetry settings of described precast beam body 1, and described bent-up bar 36 upper ends anchor in the outside column.Described bent-up bar 36 is the U font for first doubling, is class zigzag structure with integral body being bent into the cross section then, as shown in FIG. structure.This bent-up bar 36 can improve the shear behavior of superposed beam end, so that superposed beam is more firm with being connected of post.Certainly, this bent-up bar 36 also can be other form of structure, as flat, oblique setting etc.
Referring to Fig. 1, in above-described embodiment that the present invention provides, web 12 sides and the edge of a wing 11 upper surfaces of described precast beam body 1 are processed into crude.Be arranged to crude face can improve pre-erection with after water the bonding strength of part, improve the bonding surface shear strength of the old and new's concrete.
Referring to Fig. 7, in above-described embodiment that the present invention provides, the described beam body web 12 of secondary beam 4 lay-down locations is provided with through hole 17, and the local reinforcing bar of secondary beam passes through hole 17, imbed in the rear pouring concrete 2, thereby the anchoring property of strengthening time beam steel improves globality.
Referring to Fig. 8, in above-described embodiment that the present invention provides, be embedded with reinforcing bar 38 in the lower, transverse of the described beam body web 12 of shelving secondary beam, reinforcing bar 38 is imbedded in the rear pouring concrete 2 with the lower rebar overlap joint of secondary beam, and the globality of primary-secondary beam is improved.
Claims (10)
1. the prestressed reinforced concrete superposed beam of a convex-concave superposed surfaces, comprise inverted T-shaped precast-prestressed precast beam body and
Water the steel bar concrete part after the shape, the two composition rectangle or top connect the rectangle superposed beam of floor, it is characterized in that described precast beam body vertically is embedded with prestress wire, be embedded with stirrup on the bottom flange of described precast beam body, be embedded with rectangle hoop on the web of described precast beam body, described stirrup inserts to be anchored in and waters in the steel bar concrete part after described, and the top of watering the steel bar concrete part after described vertically is embedded with reinforcing bar.
2. superposed beam as claimed in claim 1, it is characterized in that at least one side is associated with some perpendicular to the prefabricated superimposed secondary beam of described precast beam body, the pre-erection of described secondary beam stretches into and waters steel bar concrete part certain depth after described, and the pre-erection of described secondary beam is positioned on the edge of a wing of described precast beam body.
3. superposed beam as claimed in claim 2 is characterized in that longitudinally burying at least one U-shaped underground between the edge of a wing of described secondary beam and precast beam body hangs muscle, and the described muscle that hangs anchors into and waters after described in the steel bar concrete part.
4. superposed beam as claimed in claim 1 is characterized in that can be U-shaped before colligation superposed beam upper reinforcement when stirrup is prefabricated on the edge of a wing of described precast beam body, and its right angle, upper end bending forms the enclosed type stirrup.
5. superposed beam as claimed in claim 1 is characterized in that longitudinally leaving through hole on the web of precast beam body, is installed with the reinforcing bar of TBE (threaded both ends) on the described through hole, and described reinforcing bar stretches out the beam sides certain-length.
6. superposed beam as claimed in claim 1, the edge of a wing, the two ends upper surface that it is characterized in that described precast beam body is buried additional bar underground, described additional bar is imbedded and is watered certain-length in the steel bar concrete part after described, and the other end of described additional bar stretches out the beam-ends face and stretches in the outside column concrete.
7. superposed beam as claimed in claim 1, it is characterized in that watering after described that the end of steel bar concrete part is embedding that bent-up bar arranged, described bent-up bar is positioned at top, the edge of a wing and the setting of web bilateral symmetry of described precast beam body, and described bent-up bar upper end anchors in the outside column.
8. superposed beam as claimed in claim 1 is characterized in that the web side of described precast beam body and edge of a wing upper surface are processed into crude.
9. superposed beam as claimed in claim 1 is characterized in that invertible T-shaped precast beam secondary beam lay-down location web bottom is provided with through hole, and the secondary beam lower rebar is passed through hole and imbedded in the rear pouring concrete.
10. superposed beam as claimed in claim 1 is characterized in that invertible T-shaped precast beam secondary beam lay-down location web lower, transverse is embedded with tension rib, and secondary beam lower rebar and drawknot overlap joint are imbedded in the rear pouring concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210291452.0A CN102852279B (en) | 2012-08-16 | 2012-08-16 | A kind of prestressed reinforced concrete composite beam of convex-concave superposed surfaces |
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| CN201210291452.0A CN102852279B (en) | 2012-08-16 | 2012-08-16 | A kind of prestressed reinforced concrete composite beam of convex-concave superposed surfaces |
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| CN102852279A true CN102852279A (en) | 2013-01-02 |
| CN102852279B CN102852279B (en) | 2016-10-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544736A (en) * | 2015-12-02 | 2016-05-04 | 上海欧本钢结构有限公司 | Concrete precast beam and girder connecting structure |
| CN106049675A (en) * | 2016-07-26 | 2016-10-26 | 沈阳建筑大学建筑设计研究院 | Docking connection construction of prefabricated assembly concrete superposed beams |
| CN108221712A (en) * | 2018-02-02 | 2018-06-29 | 中交二公局第工程有限公司 | Technique based on the whole segment lifting erection crane of the traversing cable-stayed bridge composite beam of unbalance loading |
| CN111502117A (en) * | 2020-04-07 | 2020-08-07 | 中国建筑第八工程局有限公司 | Large-section row reserved hole building structure on prestressed structural beam and construction method |
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| JP2000144905A (en) * | 1998-11-12 | 2000-05-26 | Ohbayashi Corp | Mixed structural beam |
| CN2633992Y (en) * | 2003-09-09 | 2004-08-18 | 吴方伯 | Steel bar concrete prefabricated member for compound girder |
| CN201087480Y (en) * | 2007-08-16 | 2008-07-16 | 同济大学 | Prestressed concrete composite beam |
| CN202831387U (en) * | 2012-08-16 | 2013-03-27 | 杨众 | Prestressed reinforced concrete composite beam with concavo-convex composite surface |
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2012
- 2012-08-16 CN CN201210291452.0A patent/CN102852279B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000144905A (en) * | 1998-11-12 | 2000-05-26 | Ohbayashi Corp | Mixed structural beam |
| CN2633992Y (en) * | 2003-09-09 | 2004-08-18 | 吴方伯 | Steel bar concrete prefabricated member for compound girder |
| CN201087480Y (en) * | 2007-08-16 | 2008-07-16 | 同济大学 | Prestressed concrete composite beam |
| CN202831387U (en) * | 2012-08-16 | 2013-03-27 | 杨众 | Prestressed reinforced concrete composite beam with concavo-convex composite surface |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544736A (en) * | 2015-12-02 | 2016-05-04 | 上海欧本钢结构有限公司 | Concrete precast beam and girder connecting structure |
| CN105544736B (en) * | 2015-12-02 | 2018-08-21 | 上海欧本钢结构有限公司 | A kind of connection structure of concrete prefabricated beam and girder steel |
| CN106049675A (en) * | 2016-07-26 | 2016-10-26 | 沈阳建筑大学建筑设计研究院 | Docking connection construction of prefabricated assembly concrete superposed beams |
| CN108221712A (en) * | 2018-02-02 | 2018-06-29 | 中交二公局第工程有限公司 | Technique based on the whole segment lifting erection crane of the traversing cable-stayed bridge composite beam of unbalance loading |
| CN108221712B (en) * | 2018-02-02 | 2019-05-10 | 中交二公局第一工程有限公司 | The construction technology of erection crane based on the traversing whole segment lifting of cable-stayed bridge composite beam of unbalance loading |
| CN111502117A (en) * | 2020-04-07 | 2020-08-07 | 中国建筑第八工程局有限公司 | Large-section row reserved hole building structure on prestressed structural beam and construction method |
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| CN102852279B (en) | 2016-10-05 |
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