CN102852280A - Precast pre-stressed beam with shelving corbel outs - Google Patents
Precast pre-stressed beam with shelving corbel outs Download PDFInfo
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- CN102852280A CN102852280A CN2012102914817A CN201210291481A CN102852280A CN 102852280 A CN102852280 A CN 102852280A CN 2012102914817 A CN2012102914817 A CN 2012102914817A CN 201210291481 A CN201210291481 A CN 201210291481A CN 102852280 A CN102852280 A CN 102852280A
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Abstract
The invention discloses a precast pre-stressed beam with shelving corbel outs. The precast pre-stressed beam comprises a beam body and a pre-stressed steel strand as a main reinforcement embedded in the beam body. The beam body is provided with stirrups stretching out of an upper surface of the beam body. The precast pre-stressed beam is characterized in that ends of the precast pre-stressed beam are provided with shelving corbel outs; trapezoidal notches are arranged below the shelving corbel outs; and the beam body is provided with multiple supporting formwork through-holes in a longitudinal direction. The precast pre-stressed beam provided with the invention adopts the shelving corbel outs so that construction is convenient; a cost is low; and integrity is good. The trapezoidal notches at the ends of the beam body have large gradient so that inclined stirrup arrangement after beam installation is convenient and beam end shearing strength is improved.
Description
Technical field
The present invention relates to a kind of building prefabrication beam, relate in particular to the prefabricated secondary beam of prestressing force in a kind of integral precast structure.
Background technology
Usually establish prop in the integral precast structure construction and bear the construction stage dead load, but when higher or bottom soil property is relatively poor when floor height, stable or the settlement Control of prop is difficult, therefore under the construction stage beam, usually do not establish prop, dead load load and construction live load are born by precast beam, especially secondary beam shelve the head must satisfy requirement of strength.The patent of declaring before this adopts channel-section steel to shelve that its cost of head is high makes complicatedly, and beam-ends down gap place can't the arrangement of reinforcement stirrup, affects the shear behavior of beam-ends, and in addition, the channel-section steel width is little, poor stability during construction.Not establishing pillar under a kind of construction stage beam directly bears the prefabricated secondary beam of construction stage load and 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, provides that a kind of making is simple, cost is low, and the prestressing force precast beam of good stability during construction.
Shelve the prestressing force precast beam of head according to a kind of band provided by the invention, comprise that Liang Tihe is embedded in Liang Tizhong as the prestress wire of main muscle, the part that described beam body is provided with stirrup and described stirrup is stretched out the upper surface of described beam body, described beam-ends is provided with to shelve and takes the lead, be provided with trapeze cut below taking the lead, longitudinally be provided with a plurality of formwork through holes on the described beam body.
The prestressing force precast beam of shelving head according to a kind of band provided by the invention also has following attached technical characterictic:
Described taking the lead stretched out beam-ends face 100-200mm, and the width of taking the lead is less than beam body width 50-60mm, the height 100-200mm that takes the lead, and described breach is the trapezoidal shape hypotenuse and is 45 ° of left and right sides angles, notch depth 300-400mm.
Be furnished with the U-shaped reinforcing bar of some horizontal positioned and the stirrup of vertical placement in described the taking the lead, the U-shaped reinforcing bar stretches into certain-length in the beam body.
Described beam-ends is embedded with bent-up bar, and the upper surface certain-length of taking the lead is exposed in bent-up bar upper end, two bent-up bars shape that takes the shape of the letter U that is connected in the lower end.
Described prestress wire stretches out breach end face certain-length, and the steel strand end is bent into the right angle crotch.
Described beam body top also is embedded with the prestress wire that adopts the pre-tensioning system construction.
Described prestress wire has sleeve pipe at least part of steel strand cover of beam-ends, and described sleeve pipe is embedded in the end of described beam body.
The described interior anti-shear steel plate that vertically is embedded with of taking the lead.
The prestressing force precast beam of shelving head according to a kind of band provided by the invention compared with prior art has following advantage: at first, the present invention adopts steel bar concrete to shelve head, manufacturing, easy construction, cost is low, and good integrity is shelved safe and reliable, can save prop, greatly make things convenient for floor construction; Secondly, beam-ends breach gradient of the present invention is large, can inclined stirrup be set after beam installs conveniently, improves the shear behavior of beam-ends.
Description of drawings
Fig. 1 is stereogram of the present invention
Fig. 2 is arrangement of reinforcement elevation of the present invention
Fig. 3 is beam-ends of the present invention and the arrangement of reinforcement full-page proof of taking the lead
Fig. 4 is section of the present invention and arrangement of reinforcement
Fig. 5 is the arrangement of reinforcement section of taking the lead of the present invention
The specific embodiment
Referring to Fig. 1 to Fig. 5, shelve among the embodiment of prestressing force precast beam of head at a kind of band that the present invention provides, comprise beam body 1 and be embedded in Liang Tizhong as the prestress wire 2 of main muscle, the part that described beam body 1 is provided with stirrup 11 and described stirrup 11 is stretched out the upper surface of described beam body, described beam-ends is provided with to shelve takes the lead 3,3 belows of taking the lead are provided with trapeze cut 12, longitudinally are provided with a plurality of formwork through holes 13 on the described beam body 1.Described shelve to take the lead 3 floor load and construction live load be delivered on the girder, and need not to establish in the end temporary supporting, convenient construction greatly, and trapeze cut 12 is established for making to stay in the beam after reserved joint bar on the girder can extend into whole watering improves the globality of girder and secondary beam connection.Formwork through hole 13 is used for arranging the hold item of floor slab formerecting, the load of floor can directly be passed on the precast beam and need not to set up and lands scaffold, can reduce cost by convenient construction.
Referring to Fig. 3, in above-described embodiment that the present invention provides, described taking the lead is furnished with the U-shaped reinforcing bar 31 of some horizontal positioned and the stirrup 32 of vertical placement in 3, U-shaped reinforcing bar 31 stretches into certain-length in the beam body, described U-shaped muscle 31 is the outer too short problem of horizontal bar anchorage length of solution beam, and must stretch into certain-length in the beam to satisfy the anchorage length requirement.
Referring to Fig. 2, Fig. 3, in above-described embodiment that the present invention provides, described beam-ends is embedded with bent-up bar 4, and the 3 upper surface certain-lengths of taking the lead are exposed in bent-up bar 4 upper ends, two bent-up bars 4 shape that takes the shape of the letter U that is connected in the lower end.Described bent-up bar 4 can be used as again the anti-shear reinforcing bar of superposed beam operational phase as the tensile reinforcement of 3 construction stages of taking the lead, and it is the lower end anchoring property that bends up muscle in order to improve that the lower end is linked to be U-shaped.
Referring to Fig. 1 to Fig. 3, in above-described embodiment that the present invention provides, described prestress wire stretches out breach 12 end face certain-lengths, steel strand 2 ends are bent into the right angle crotch, the steel strand 2 of right angle crotch can guarantee with girder on the reinforcing bar that stretches out enough lap length are arranged, improve the globality that primary-secondary beam connects.
Referring to Fig. 2, Fig. 3, in above-described embodiment that the present invention provides, described beam body top also is embedded with the prestress wire 5 that adopts the pre-tensioning system construction, and the antiarch that beam body upper steel twisted wire 5 plays balance bottom steel strand 2 when putting makes precast beam top the crack not occur.
Referring to Fig. 3, Fig. 4, in above-described embodiment that the present invention provides, described prestress wire 2 has sleeve pipe 21 at least part of steel strand cover of beam-ends, described sleeve pipe 21 is embedded in the end of described beam body, beam end portion steel strand 2 are buried the bonding that sleeve pipe can be eliminated concrete and steel strand underground, thereby discharge prestressing force, and this local compressive stress that not only can reduce beam-ends is concentrated, avoid the beam-ends bottom crack to occur, can also alleviate the compressive stress stack of superposed beam beam-ends bottom.
Referring to Fig. 3, Fig. 5, in above-described embodiment that the present invention provides, vertical facilities has steel plate 33 in described 3 concretes of taking the lead, the shear strength of described steel plate 33 for strengthening taking the lead.
Claims (8)
1. a band is shelved the prestressing force precast beam of head, comprise that Liang Tihe is embedded in Liang Tizhong as the prestress wire of main muscle, the part that described beam body is provided with stirrup and described stirrup is stretched out the upper surface of described beam body, it is characterized in that described beam-ends is provided with to shelve takes the lead, be provided with trapeze cut below taking the lead, longitudinally be provided with a plurality of formwork through holes on the described beam body.
2. precast beam as claimed in claim 1 is characterized in that described taking the lead stretch out beam-ends face 100-200mm, take the lead width less than beam body width 50-60mm, take the lead the height 100-200mm, described breach is the trapezoidal shape hypotenuse and is 45 ° of left and right sides angles, notch depth 300-400mm.
3. precast beam as claimed in claim 1 is characterized in that being furnished with in described the taking the lead the U-shaped reinforcing bar of some horizontal positioned and the stirrup of vertical placement, and the U-shaped reinforcing bar stretches into certain-length in the beam body.
4. precast beam as claimed in claim 1 is characterized in that described beam-ends is embedded with bent-up bar, and the upper surface certain-length of taking the lead is exposed in bent-up bar upper end, two bent-up bars shape that takes the shape of the letter U that is connected in the lower end.
5. precast beam as claimed in claim 1 is characterized in that described prestress wire stretches out breach end face certain-length, and the steel strand end is bent into the right angle crotch.
6. precast beam as claimed in claim 1 is characterized in that described beam body top also is embedded with the prestress wire that adopts the pre-tensioning system construction.
7. precast beam as claimed in claim 1 is characterized in that described prestress wire has sleeve pipe at least part of steel strand cover of beam-ends, and described sleeve pipe is embedded in the end of described beam body.
8. precast beam is characterized in that the described interior anti-shear steel plate that vertically is embedded with of taking the lead as claimed in claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210291481.7A CN102852280B (en) | 2012-08-16 | 2012-08-16 | The prestressing force precast beam of head shelved by a kind of band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210291481.7A CN102852280B (en) | 2012-08-16 | 2012-08-16 | The prestressing force precast beam of head shelved by a kind of band |
Publications (2)
| Publication Number | Publication Date |
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| CN102852280A true CN102852280A (en) | 2013-01-02 |
| CN102852280B CN102852280B (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210291481.7A Active CN102852280B (en) | 2012-08-16 | 2012-08-16 | The prestressing force precast beam of head shelved by a kind of band |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612329A (en) * | 2015-01-30 | 2015-05-13 | 柳忠东 | Prefabricated truss beam |
| CN104878837A (en) * | 2015-01-30 | 2015-09-02 | 柳忠东 | Concrete frame structure system and assembly method thereof |
| CN109914842A (en) * | 2017-12-12 | 2019-06-21 | 中冶建筑研究总院（上海）有限公司 | A kind of concrete floor structure and its reinforcement means with secondary beam |
| CN113863487A (en) * | 2021-08-26 | 2021-12-31 | 江苏华源建筑设计研究院股份有限公司 | Construction process for connecting joints of beam-end steel concrete combined notched beam and primary and secondary beams |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000144905A (en) * | 1998-11-12 | 2000-05-26 | Ohbayashi Corp | Mixed structural beam |
| CN201785941U (en) * | 2010-09-28 | 2011-04-06 | 杨峰 | Pretensioned prestressed reinforced concrete precast beam |
| CN102418400A (en) * | 2010-09-28 | 2012-04-18 | 杨峰 | Pretensioning prestressed reinforced concrete precast beam |
| CN202831390U (en) * | 2012-08-16 | 2013-03-27 | 杨众 | Prestressed precast beam with shelved head |
-
2012
- 2012-08-16 CN CN201210291481.7A patent/CN102852280B/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 |
| CN201785941U (en) * | 2010-09-28 | 2011-04-06 | 杨峰 | Pretensioned prestressed reinforced concrete precast beam |
| CN102418400A (en) * | 2010-09-28 | 2012-04-18 | 杨峰 | Pretensioning prestressed reinforced concrete precast beam |
| CN202831390U (en) * | 2012-08-16 | 2013-03-27 | 杨众 | Prestressed precast beam with shelved head |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612329A (en) * | 2015-01-30 | 2015-05-13 | 柳忠东 | Prefabricated truss beam |
| CN104878837A (en) * | 2015-01-30 | 2015-09-02 | 柳忠东 | Concrete frame structure system and assembly method thereof |
| CN109914842A (en) * | 2017-12-12 | 2019-06-21 | 中冶建筑研究总院（上海）有限公司 | A kind of concrete floor structure and its reinforcement means with secondary beam |
| CN113863487A (en) * | 2021-08-26 | 2021-12-31 | 江苏华源建筑设计研究院股份有限公司 | Construction process for connecting joints of beam-end steel concrete combined notched beam and primary and secondary beams |
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| Publication number | Publication date |
|---|---|
| CN102852280B (en) | 2016-07-13 |
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Address after: Jiangdong District Baizhang road 315000 in Zhejiang province Ningbo City Exhibition Center No. 168 28C Applicant after: Yang Zhong Applicant after: Yang Feng Address before: 315000, AUX Road, No. 757 Li RI Road, Yinzhou, Ningbo, Zhejiang, 502 Applicant before: Yang Zhong Applicant before: Yang Feng |
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