CN102852277A - Pre-tensioned deformed reinforced concrete precast main beam - Google Patents
Pre-tensioned deformed reinforced concrete precast main beam Download PDFInfo
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- CN102852277A CN102852277A CN2012102913068A CN201210291306A CN102852277A CN 102852277 A CN102852277 A CN 102852277A CN 2012102913068 A CN2012102913068 A CN 2012102913068A CN 201210291306 A CN201210291306 A CN 201210291306A CN 102852277 A CN102852277 A CN 102852277A
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Abstract
The invention discloses a pre-tensioned deformed reinforced concrete precast main beam. The pre-tensioned deformed reinforced concrete precast main beam is characterized in that a beam body has an inverted T-shaped section and is composed of a horizontal rectangular compression-resistant part and a vertical rectangular shearing-resistant part; stirrups are embedded in the vertical rectangular shearing-resistant part; parts of the stirrups stretch out of an upper surface of the vertical rectangular shearing-resistant part; U-shaped stirrups are embedded in the horizontal compression-resistant part; U-shaped stirrup upper parts having certain length stretch out of an upper surface of the horizontal compression-resistant part; and steel strands are embedded in the horizontal compression-resistant part. A step of the pre-tensioned deformed reinforced concrete precast main beam having the inverted T-shaped section can be straightly provided with a secondary beam so that secondary beam installation is convenient. In construction, when a temporary support is arranged at a lower part of the secondary beam, no additional rebars are arranged at a loading step.
Description
Technical field
The present invention relates to a kind of building prefabricated components, relate in particular to a kind of for the precast beam as the framework superposed beam of girder.
Background technology
Usually adopt apart from tee section and secondary beam junction for the prefabricated girder of shelving secondary beam at present and keep somewhere breach, shelving of secondary beam taken the lead be held on this breach, or a kind of prefabricated girder of ZL201020553626.2 patent disclosure, leave the hole that to wear time beam steel in the beam, the overlapping layers concrete water smash after primary-secondary beam join together, this girder shortcoming is that secondary beam must arrange concrete or shaped steel and shelves and take the lead, need stay breach or hole on the girder, beam is made trouble, the resistance to compression cross section weakened when prefabricated girder prestressing force was put, affected the construction stage flexural strength of beam.A kind of can shelving easily without shelving the prefabricated girder of inverted T-shaped that the secondary beam of taking the lead shelves 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, the prefabricated girder of pre-tensioning system deformed bar concrete easy for installation that provides.
According to the prefabricated girder of a kind of pre-tensioning system deformed bar concrete provided by the invention, it is characterized in that the inverted T-shaped cross section that the beam body partly is comprised of horizontal rectangular resistance to compression part and vertical rectangle shearing resistance, described vertical rectangle shearing resistance partly is embedded with stirrup, the part of described stirrup is stretched out the upper surface of described vertical rectangle shearing resistance part, be embedded with the u tie muscle on the described horizontal rectangular resistance to compression part, horizontal rectangular resistance to compression part upper surface certain-length is stretched out on the top of u tie muscle, and steel strand are embedded in the horizontal rectangular resistance to compression part.
Also have following attached technical characterictic according to the prefabricated girder of a kind of pre-tensioning system deformed bar concrete provided by the invention:
At least one end of described beam body is provided with and is suitable for the shaped steel that is connected with external structure, the part of described shaped steel is embedded in the described beam body, remainder is placed on the end of described beam body, is provided with bolt hole on the exposed portions serve shaped steel and/or is suitable for the perforation that the outside column stirrup is walked.
On the horizontal rectangular resistance to compression part of supporting secondary beam some sections door shapes or rectangle reinforcing bar are arranged longitudinally, this rebar spacing 50-150mm disposes at least a U-shaped and hangs muscle on the vertical rectangle shearing resistance part of this fragment position, hang muscle and expose beam body upper surface certain-length.
Described vertical rectangle shearing resistance part top is also embedding a prestress wire, and steel strand are constructed with pre-tensioning system.
Described steel strand expose beam-ends face certain-length, and there is the right angle crotch steel strand end, and the part steel strand cover in the beam-ends horizontal rectangular resistance to compression part has sleeve pipe, and sleeve pipe is embedded in the beam end of body.
The both sides leaving certain gaps uncovered by the economic plan of at least one end of described beam body horizontal rectangular resistance to compression part, bottom outside is embedded with pre-buried angle steel, is welded with anchor bar in the angle steel.
Be provided with at least one through hole or horizontal pre-buried some steel ties in the vertical rectangle shearing resistance part bottom of supporting secondary beam.
In the horizontal rectangular resistance to compression part of supporting secondary beam, laterally bury at least an anti-shear steel plate underground, be welded with a shape muscle on the steel plate and be embedded in the vertical rectangle shearing resistance part concrete.
The vertical rectangle shearing resistance part of described beam body longitudinally is provided with several formwork through holes.
Be provided with bent-up bar in the described beam body, beam-ends upper surface certain-length is exposed in the bent-up bar upper end, and the bent-up bar lower end joins together and takes the shape of the letter U.
Compared with prior art have following advantage according to the prefabricated girder of a kind of pre-tensioning system deformed bar concrete provided by the invention:
1, the cross section be inverted T-shaped prefabricated Liangqi step place directly plate shelve secondary beam, make secondary beam easy for installation, when particularly the construction stage, secondary beam was divided into temporary supporting, shelve the step place and need not additional bar.
2, adopt the inverted T-shaped cross section, make the prefabricated units weight reduction, hoisting transportation is convenient, reduces the elevating capacity requirement of tower crane is installed.
3, lower horizontal rectangle resistance to compression part is joined restriction hoop in addition, makes this part concrete put a stage and beam-ends improves in the pressure zone compressive strength of negative bending moment effect underbeam at prestressing force, and beam ductility is improved.
4, the u tie muscle is buried on rectangular horizontal resistance to compression part top underground, and the bent orthogonal hoop of u tie muscle can make superposed beam be combined into rectangular beam, up and down all can arrangement of reinforcement in the last layer, increase the globality of rectangle superposed beam.
5, partly box out and bury tension rib in the vertical rectangle shearing resistance of secondary beam lay-down location, can make things convenient for time beam steel to pass or overlap, increase the globality of primary-secondary beam.
Description of drawings
Fig. 1 is stereogram of the present invention.
Fig. 2 is arrangement of reinforcement of the present invention.
Fig. 3 is sectional reinforcement figure of the present invention.
Fig. 4 is the A-A sectional view of Fig. 2 of the present invention.
Fig. 5 is built-in fitting stereogram among Fig. 4 of the present invention
The specific embodiment
Referring to Fig. 1 to Fig. 4, the embodiment of the prefabricated girder of a kind of pre-tensioning system deformed bar concrete that provides in the present invention, the inverted T-shaped cross section that the beam body is comprised of horizontal rectangular resistance to compression part 1 and vertical rectangle shearing resistance part 2, described vertical rectangle shearing resistance part 2 is embedded with rectangle hoop 3, the part of described rectangle hoop 3 is stretched out the upper surface of described vertical rectangle shearing resistance part 2, be embedded with u tie muscle 4 on the described horizontal rectangular resistance to compression part 1, horizontal rectangular resistance to compression part 1 upper surface certain-length is stretched out on the top of u tie muscle 4, and steel strand 5 are embedded in the horizontal rectangular resistance to compression part 1.The present invention is arranged to the inverted T-shaped structure with precast beam, and wherein horizontal rectangular resistance to compression part 1 can satisfy the resistance to compression needs that beam body prestressing force is put beam-ends under a stage and the hogging moment effect, and vertical rectangle shearing resistance part 2 can satisfy the main shearing resistance needs of superposed beam.Can satisfy resistance to compression and the shearing resistance needs of beam body by such composite unit structure, and, because of pre-erection from heavy and light, lifting is convenient, the lifting that also is beneficial to secondary beam with after water being connected of part.
Referring to Fig. 1 and Fig. 2, in above-described embodiment that the present invention provides, at least one end of described beam body is provided with and is suitable for the shaped steel 6 that is connected with external structure, the part of described shaped steel 6 is embedded in the described beam body, remainder is placed on the end of described beam body, is provided with bolt hole 61 on the exposed portions serve shaped steel and/or is suitable for the perforation 62 that the outside column stirrup is walked.Described shaped steel 6 makes things convenient for the beam body to be shelved on the post or on other support members.Described bolt hole 61 makes things convenient for being connected of shaped steel and external component.Described perforation 62 is beneficial to walking of outside reinforcing bar.
Referring to Fig. 1 to Fig. 3, in above-described embodiment that the present invention provides, on the horizontal rectangular resistance to compression part 1 of secondary beam lay-down location, some door shapes or rectangle reinforcing bar 7 are arranged longitudinally, this reinforcing bar 7 spacing 50-150mm, present embodiment is 60mm.The position at described reinforcing bar 7 places is secondary beam lay-down locations, and this reinforcing bar 7 can improve shearing resistance, Punching Shear and the anti-bending strength of girder supporting place.Join U-shaped in the vertical rectangle shearing resistance part 2 of this fragment position and hang muscle 8, hang muscle 8 and expose beam body upper surface certain-length.Described muscle 8 further shearing resistance, the punching shear resistant performance of this junction of raising of hanging.
Referring to Fig. 1 to Fig. 3, in above-described embodiment that the present invention provides, described vertical rectangle shearing resistance part 2 tops are also embedding steel strand 51, and steel strand 51 usefulness pre-tensioning systems are constructed.This steel strand 51 are used for producing antiarch when balance steel strand 5 are put, avoid top concrete cracking.
Referring to Fig. 1 and Fig. 2, in above-described embodiment that the present invention provides, all steel strand expose beam-ends face certain-length, and there is right angle crotch 52 steel strand 5,51 ends, part steel strand 5 covers in the beam-ends horizontal rectangular resistance to compression part 1 have sleeve pipe 53, and sleeve pipe 53 is embedded in the beam end of body.Described crotch 52 is beneficial to anchorage length and the performance that increases steel strand, improves bonding strength.Described sleeve pipe 53 can the release portion steel strand stress, prevent that the crack from appearring in the end, two ends, reduce the compressive stress of end.
Referring to Fig. 1 and Fig. 2, in above-described embodiment that the present invention provides, two section's leaving certain gaps uncovered by the economic plans 11 of described beam body horizontal rectangular resistance to compression part 1 at least one end.Bottom outside is embedded with pre-buried angle steel 9, is welded with anchor bar in the angle steel, and described breach 11 is beneficial to the bending of steel strand, and this breach 11 is positioned at the position that steel strand stretch out the beam body.Pre-buried angle steel be used for post on the built-in fitting welding, make the beam fixation.
Referring to Fig. 1 and Fig. 2, in above-described embodiment that the present invention provides, the vertical rectangle shearing resistance of described beam body part 2 longitudinally is provided with several through holes 21.Described through hole 21 is beneficial to the installation of later stage template for a nib.
Referring to Fig. 1 and Fig. 2, in above-described embodiment that the present invention provides, be provided with bent-up bar 91 in the described beam body.Described bent-up bar 91 can improve the shear behavior of beam end of body, and bent-up bar 91 bends first and is U-shaped, and then whole bending is the class zigzag.Can improve anchoring property like this, certainly, it also can be other form of structure, such as straight shape or oblique setting.
Referring to Fig. 1, Fig. 2, Fig. 4, in above-described embodiment that the present invention provides, described girder is provided with through hole 25 or horizontal pre-buried steel tie 32 in vertical shearing resistance part 2 bottoms of secondary beam lay-down location, the steel strand that through hole 25 is convenient in the secondary beam pass, and after steel tie 32 was convenient to steel strand overlap joint in the secondary beam and makes that primary-secondary beam is whole and water, globality improved greatly.
Referring to Fig. 4, Fig. 5, among the embodiment that the present invention provides, described girder vertically is embedded with steel plate 95 in the horizontal rectangular resistance to compression part of supporting secondary beam, steel plate 95 is welded with a shape reinforcing bar 96, steel plate 95 is born secondary beam and is passed to concentrated shearing on the girder, and door shape reinforcing bar 96 is passed to power in the concrete of vertical rectangle shearing resistance section.
Claims (10)
1. prefabricated girder of pre-tensioning system deformed bar concrete, it is characterized in that the inverted T-shaped cross section that the beam body partly is comprised of horizontal rectangular resistance to compression part and vertical rectangle shearing resistance, described vertical rectangle shearing resistance partly is embedded with rectangle hoop, the part of described rectangle hoop is stretched out the upper surface of described vertical rectangle shearing resistance part, be embedded with the u tie muscle on the described horizontal rectangular resistance to compression part, horizontal rectangular resistance to compression part upper surface certain-length is stretched out on the top of u tie muscle, is embedded with prestress wire in the described horizontal rectangular resistance to compression part.
2. prefabricated girder as claimed in claim 1, it is characterized in that at least one end of described beam body is provided with is suitable for the shaped steel that is connected with external structure, the part of described shaped steel is embedded in the described beam body, remainder is placed on the end of described beam body, is provided with bolt hole on the exposed portions serve shaped steel and/or is suitable for the perforation that the outside column stirrup is walked.
3. prefabricated girder as claimed in claim 1, it is characterized in that on the horizontal rectangular resistance to compression part of supporting secondary beam, some sections door shapes or rectangle reinforcing bar being arranged longitudinally, this rebar spacing 50-150mm, on the vertical rectangle shearing resistance part of this fragment position, dispose at least a U-shaped and hang muscle, hang muscle and expose beam body upper surface certain-length.
4. prefabricated girder as claimed in claim 1, it is characterized in that described vertical rectangle shearing resistance part top is also embedding has a prestress wire, and steel strand are constructed with pre-tensioning system.
5. prefabricated girder as claimed in claim 1 is characterized in that described steel strand expose beam-ends face certain-length, and there is the right angle crotch steel strand end, and the part steel strand cover in the beam-ends horizontal rectangular resistance to compression part has sleeve pipe, and sleeve pipe is embedded in the beam end of body.
6. prefabricated girder as claimed in claim 1 is characterized in that the both sides leaving certain gaps uncovered by the economic plan of at least one end of described beam body horizontal rectangular resistance to compression part, and bottom outside is embedded with pre-buried angle steel, is welded with anchor bar in the angle steel.
7. prefabricated girder as claimed in claim 1 is characterized in that being provided with in the vertical rectangle shearing resistance part bottom of supporting secondary beam at least one through hole or horizontal pre-buried some steel ties.
8. girder as claimed in claim 1 is characterized in that laterally burying at least an anti-shear steel plate underground in the horizontal rectangular resistance to compression part of supporting secondary beam, is welded with a shape muscle on the steel plate and is embedded in the vertical rectangle shearing resistance part concrete.
9. prefabricated girder as claimed in claim 1 is characterized in that the vertical rectangle shearing resistance part of described beam body longitudinally is provided with several formwork through holes.
10. prefabricated girder as claimed in claim 1 is characterized in that being provided with bent-up bar in the described beam body, and beam-ends upper surface certain-length is exposed in the bent-up bar upper end, and the bent-up bar lower end joins together and takes the shape of the letter U.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102913068A CN102852277A (en) | 2012-08-16 | 2012-08-16 | Pre-tensioned deformed reinforced concrete precast main beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102913068A CN102852277A (en) | 2012-08-16 | 2012-08-16 | Pre-tensioned deformed reinforced concrete precast main beam |
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| CN102852277A true CN102852277A (en) | 2013-01-02 |
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| CN2012102913068A Pending CN102852277A (en) | 2012-08-16 | 2012-08-16 | Pre-tensioned deformed reinforced concrete precast main beam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107642163A (en) * | 2017-10-23 | 2018-01-30 | 重庆凌锋投资管理有限公司 | A kind of self-support type steel plate concrete integral type beam slab is whole to pour structure and its construction method |
| CN110700489A (en) * | 2019-10-30 | 2020-01-17 | 广西建工集团第四建筑工程有限责任公司 | Construction method of rear hoop method section steel 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 (5)
| 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 |
| CN102418401A (en) * | 2010-09-28 | 2012-04-18 | 杨峰 | Pretensioning prestressed reinforced concrete precast beam |
| CN202831389U (en) * | 2012-08-16 | 2013-03-27 | 杨众 | Pre-tensioning method deformed reinforced concrete pre-cast primary beam |
-
2012
- 2012-08-16 CN CN2012102913068A patent/CN102852277A/en active Pending
Patent Citations (5)
| 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 |
| CN102418401A (en) * | 2010-09-28 | 2012-04-18 | 杨峰 | Pretensioning prestressed reinforced concrete precast beam |
| CN202831389U (en) * | 2012-08-16 | 2013-03-27 | 杨众 | Pre-tensioning method deformed reinforced concrete pre-cast primary beam |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107642163A (en) * | 2017-10-23 | 2018-01-30 | 重庆凌锋投资管理有限公司 | A kind of self-support type steel plate concrete integral type beam slab is whole to pour structure and its construction method |
| CN110700489A (en) * | 2019-10-30 | 2020-01-17 | 广西建工集团第四建筑工程有限责任公司 | Construction method of rear hoop method section steel 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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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 District, Ningbo, Zhejiang, 502 Applicant before: Yang Zhong Applicant before: Yang Feng |
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