CN103498531A - Long-span pre-stressing I-shaped steel reinforced concrete superposed beam - Google Patents
Long-span pre-stressing I-shaped steel reinforced concrete superposed beam Download PDFInfo
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- CN103498531A CN103498531A CN201310499860.XA CN201310499860A CN103498531A CN 103498531 A CN103498531 A CN 103498531A CN 201310499860 A CN201310499860 A CN 201310499860A CN 103498531 A CN103498531 A CN 103498531A
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Abstract
The invention relates to a long-span pre-stressing I-shaped steel reinforced concrete superposed beam and belongs to the field of building structures. The long-span pre-stressing I-shaped steel reinforced concrete superposed beam is composed of a prefabricated structural steel rib, a prefabricated concrete steel rib lower beam and a cast-in-place concrete steel rib upper beam. Pre-stressing reinforcing steel bars are arranged on an I-shaped steel bottom flange board of a full sawtooth-hole-shaped web of the prefabricated structural steel rib. The upper portion of the I-shaped structural steel top flange board and the lower portion of the I-shaped structural steel bottom flange board are respectively and symmetrically provided with longitudinal inner side regular reinforcing steel bars and are connected to form a vertical steel reinforce bar hook cage in a hooped mode and the two sides of the bottom flange board are respectively and symmetrically provided with longitudinal outer side regular reinforcing steel bars and are respectively connected to form a transverse steel reinforced bar hook cage in a hooped mode. The vertical steel reinforced bar hook cage and the transversal steel reinforced bar hook cage are integrally connected with full I-shaped structural steel. Concrete is poured along the tooth holes of the web and the transverse steel reinforced bar hook cage so that the prefabricated concrete steel rib lower beam can be formed. On the scene, the superposed beam is formed by the cast-in-place concrete steel rib upper beam or the cast-in-place concrete steel rib upper beam and a prefabricated floor cast-in-place layer are integrally formed. According to the long-span pre-stressing I-shaped steel reinforced concrete superposed beam, the tension function of the steel beam is fully achieved, on the premise that the height of the beam is not increased, the span of a building is greatly increased, and the requirement for a large span of a special building is met.
Description
Technical field
A kind of large-span prestressed I shape steel concrete composite girder of the present invention, belong to building structure field.
Background technology
According to Code for design of concrete structures, be limited to 15 on the normal reinforced concrete beam span-depth radio, when the span of beam is larger, depth of beam increases relatively, has affected the use of building clear height, and steel reinforced concrete structure combines the advantage of formed steel construction and concrete structure, intensity and toughness is larger, more than can improving span-depth radio to 24, effectively reduce depth of beam, increase the use height of building.But existing steel-concrete combined structure also has its intrinsic shortcoming, steel produces relative slippage with concrete and can not act synergistically; Increase and mostly adopt real web formed steel construction steel using amount large along with depth of beam increases steel section size, minority web perforate shaped steel is made again complexity, and the compound beam span when larger structure crack easily appears.For this reason, develop the superposed beam of different shaped steel, reinforcing bar and concrete one, acquisition is than traditional girder with rolled steel section en cased in concrete deadweight with highly relative little, and the reinforced concrete composite structure beam body that structural bearing is large, rigidity is large, anti-seismic performance is good, to meet the building demand of differing heights, span.
Summary of the invention
The purpose of this invention is to provide a kind of large-span prestressed I shape steel concrete composite girder, to improve intensity, the rigidity of superposed beam, alleviate the deadweight of superposed beam body, adapt to long span building and increase the demand that building is effectively used height; And the prefabricated degree of this superposed beam batch production is high, so reduce the site operation difficulty, promote site operation efficiency.
The present invention is achieved by the following technical solutions:
A kind of large-span prestressed I shape steel concrete composite girder, by the precasting reinforcing bar, precast concrete reinforcing bar lower beam and cast-in-situ concrete reinforcing bar top beam form, described precasting steel frame is by elongated perforation shape web i shaped steel, prestressed reinforcement, plain bars forms, described elongated perforation shape web i shaped steel two ends are the affixed stiffener that is provided with through hole respectively, on its bottom wing listrium, prestressed reinforcement is set, below i shaped steel bottom wing listrium with above top flange plate, the longitudinal medial plain bars is set respectively, be connected into cage by spaced vertically interior stirrup hoop, be symmetrical arranged outside plain bars in bottom wing listrium both sides, by walking around outside plain bars and being connected into cage through the horizontal outer stirrup hoop of shape steel web perforation, form and reinforcing cage that elongated i shaped steel is integrally connected is, along shape steel web perforation and transverse reinforcement hoop cage concreting, form precast concrete reinforcing bar T font lower beam, on precast concrete reinforcing bar T font lower beam, longitudinally interior stirrup cage cast-in-situ concrete reinforcing bar top beam is shaped to superposed beam, or longitudinally, the stirrup cage is implemented the cast-in-place moulding of one of cast-in-situ concrete reinforcing bar top beam and precast floor slab in-situ layer.
The corresponding through hole through i shaped steel two ends stiffener in the two ends of described medial and lateral plain bars is protruding.
Described upper and lower frange plate surface is furnished with respectively peg.
Described perforation shape web i shaped steel two ends stiffener, be connected with respectively H shaped steel connector, and this H shaped steel connector web has connecting hole.
A kind of large-span prestressed I shape steel concrete composite girder of the present invention, its girder steel height is larger, the transverse reinforcement hoop can pass completely through the perforation in web, form carrying platform after concreting and carry superimposed sheet, i shaped steel perforation shape web had both alleviated the deadweight of beam body, saving steel, and be linked to be integral body during the concreting of web both sides, guarantee that reinforcing bar closely is connected with concrete; Weld stud on the i-shaped beams frange plate, increased bonding between reinforcing bar and concrete and the shear resistance of bonding surface; On I shape bottom wing listrium top, prestressed reinforcement is set, the tension effect that can give full play to girder steel can effectively stop appearance and the development in crack again; Therefore, the present invention combines prestressed structure and controls crack and the large advantage of steel reinforced concrete structure high strength rigidity, greatly improves the span of building under the prerequisite that does not increase depth of beam, meets the requirement of special building to large span.
The accompanying drawing explanation
Fig. 1 superposed beam schematic perspective view of the present invention;
Fig. 2 perforation shape of the present invention web i shaped steel schematic diagram;
Fig. 3 i shaped steel of the present invention and reinforcing bar binding complete schematic diagram;
Fig. 4 precast concrete reinforcing bar of the present invention lower beam schematic diagram;
Fig. 5 cast-in-situ concrete reinforcing bar of the present invention top beam and the one-body molded schematic cross-section of precast floor slab in-situ layer.
The specific embodiment
Now further illustrate by reference to the accompanying drawings implementation process of the present invention.
A kind of large-span prestressed I shape steel concrete composite girder of the present invention, by the precasting reinforcing bar, precast concrete reinforcing bar lower beam and cast-in-situ concrete reinforcing bar top beam form, described precasting reinforcing bar is by elongated perforation shape web i shaped steel, prestressed reinforcement, plain bars forms, the respectively vertical affixed porose stiffener 4 in described elongated perforation shape web i shaped steel 2 two ends, on described i shaped steel 2 bottom wing listrium 2-2, prestressed reinforcement 1-4 is set, above i shaped steel top flange plate 2-1 with below bottom wing listrium 2-2, longitudinal medial plain bars 3-2 is being set respectively, and be connected into the vertical reinforcement cage by spaced vertically interior stirrup 3-1 hoop, be symmetrical arranged outside plain bars 1-1 in i iron web both sides, by walking around outside plain bars and be connected into the transverse reinforcement cage through the laterally outer stirrup 1-2 hoop of shape steel web sawtooth hole, then forming the reinforcing cage be integrally connected with elongated i shaped steel be, the two ends of the described interior outside plain bars all corresponding hole through i shaped steel two ends stiffener 4 are protruding, stirrup cage concreting along the shape steel web perforation and laterally, form precast concrete reinforcing bar T font lower beam 1, referring to Fig. 4, at the construction field (site), on moulding prefabricated concrete reinforcing bar T font lower beam 1, longitudinally interior stirrup cage cast-in-situ concrete reinforcing bar top beam 3 is shaped to superposed beam, referring to Fig. 1, or, after the both sides of moulding prefabricated concrete reinforcing bar lower beam 1 platform P takes and puts precast floor slab B, implement the cast-in-place moulding of one of the upper in-situ layer 3-3 of cast-in-situ concrete reinforcing bar top beam 3 and precast floor slab B, referring to Fig. 5.
Described upper and lower frange plate surface is furnished with respectively peg 2-4.
Described perforation shape web i shaped steel two ends stiffener 4, be connected with respectively H shaped steel connector 5, and the web of this H shaped steel connector 5 has connecting hole, for being connected of beam and beam-ends.
Claims (4)
1. a large-span prestressed I shape steel concrete composite girder, it is characterized in that, by the precasting reinforcing bar, precast concrete reinforcing bar lower beam and cast-in-situ concrete reinforcing bar top beam form, described precasting steel frame is by elongated perforation shape web i shaped steel, prestressed reinforcement, plain bars forms, described elongated perforation shape web i shaped steel two ends are the affixed stiffener that is provided with through hole respectively, on its bottom wing listrium, prestressed reinforcement is set, below i shaped steel bottom wing listrium with above top flange plate, the longitudinal medial plain bars is set respectively, be connected into cage by spaced vertically interior stirrup hoop, be symmetrical arranged outside plain bars in bottom wing listrium both sides, by walking around outside plain bars and being connected into cage through the horizontal outer stirrup hoop of shape steel web perforation, form and reinforcing cage that elongated i shaped steel is integrally connected is, along shape steel web perforation and transverse reinforcement hoop cage concreting, form precast concrete reinforcing bar T font lower beam, on precast concrete reinforcing bar T font lower beam, longitudinally interior stirrup cage cast-in-situ concrete reinforcing bar top beam is shaped to superposed beam, or longitudinally, the stirrup cage is implemented the cast-in-place moulding of one of cast-in-situ concrete reinforcing bar top beam and precast floor slab in-situ layer.
2. a kind of large-span prestressed I shape steel concrete composite girder according to claim 1,, it is characterized in that, the corresponding through hole through i shaped steel two ends stiffener in the two ends of medial and lateral plain bars is protruding.
3. a kind of large-span prestressed I shape steel concrete composite girder according to claim 1,, it is characterized in that, upper and lower frange plate surface is furnished with respectively peg.
4. a kind of large-span prestressed I shape steel concrete composite girder according to claim 1,, it is characterized in that, perforation shape web i shaped steel two ends stiffener, be connected with respectively H shaped steel connector, and this H shaped steel connector web has connecting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310499860.XA CN103498531A (en) | 2013-10-22 | 2013-10-22 | Long-span pre-stressing I-shaped steel reinforced concrete superposed beam |
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| CN201310499860.XA CN103498531A (en) | 2013-10-22 | 2013-10-22 | Long-span pre-stressing I-shaped steel reinforced concrete superposed beam |
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| CN103498531A true CN103498531A (en) | 2014-01-08 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967219A (en) * | 2014-05-30 | 2014-08-06 | 陈胜民 | High-efficiency high-strength I-shaped twisted steel and application method thereof |
| CN105625735A (en) * | 2016-02-23 | 2016-06-01 | 成都科创佳思科技有限公司 | Construction auxiliary beam |
| CN107023082A (en) * | 2017-05-04 | 2017-08-08 | 浙江绿筑集成科技有限公司 | A kind of close rib steel hoop Prefabricated combined beam of H profile steel and steel reinforced concrete dry wall connecting node |
| CN109306766A (en) * | 2018-10-17 | 2019-02-05 | 中国铁路设计集团有限公司 | A kind of girder with rolled steel section en cased in concrete and its construction method of the slow bonding in part |
| CN114045743A (en) * | 2021-11-19 | 2022-02-15 | 中国建筑第八工程局有限公司 | Carbon fiber prestressed tendon T-shaped beam and preparation method thereof |
| CN114809072A (en) * | 2022-03-31 | 2022-07-29 | 中铁第四勘察设计院集团有限公司 | Super-large span heavy-load underground space prestressed steel reinforced concrete top cover |
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| JPH0849349A (en) * | 1994-08-08 | 1996-02-20 | Toshiro Suzuki | Structure for reinforcing steel structural member |
| KR100646661B1 (en) * | 2005-09-14 | 2006-11-23 | 지에스건설 주식회사 | Hybrid beam for slim-floor and slim-floor structure using the same |
| CN201433507Y (en) * | 2009-06-17 | 2010-03-31 | 中国电子工程设计院 | Honeycomb beam and steel building frame |
| CN101845871A (en) * | 2010-06-30 | 2010-09-29 | 哈尔滨工业大学 | Cast-in-place steel-concrete composite beam |
| CN201794215U (en) * | 2010-09-28 | 2011-04-13 | 杨峰 | Pretensioning method prestress reinforced concrete prefabricated beam |
| CN102561591A (en) * | 2012-02-20 | 2012-07-11 | 同济大学 | Retarded adhesive prestressed steel reinforced concrete beam |
| CN203547017U (en) * | 2013-10-22 | 2014-04-16 | 湖北弘毅建设有限公司 | Long-span pre-stressing I-shaped steel reinforced concrete superposed beam |
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2013
- 2013-10-22 CN CN201310499860.XA patent/CN103498531A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0849349A (en) * | 1994-08-08 | 1996-02-20 | Toshiro Suzuki | Structure for reinforcing steel structural member |
| KR100646661B1 (en) * | 2005-09-14 | 2006-11-23 | 지에스건설 주식회사 | Hybrid beam for slim-floor and slim-floor structure using the same |
| CN201433507Y (en) * | 2009-06-17 | 2010-03-31 | 中国电子工程设计院 | Honeycomb beam and steel building frame |
| CN101845871A (en) * | 2010-06-30 | 2010-09-29 | 哈尔滨工业大学 | Cast-in-place steel-concrete composite beam |
| CN201794215U (en) * | 2010-09-28 | 2011-04-13 | 杨峰 | Pretensioning method prestress reinforced concrete prefabricated beam |
| CN102561591A (en) * | 2012-02-20 | 2012-07-11 | 同济大学 | Retarded adhesive prestressed steel reinforced concrete beam |
| CN203547017U (en) * | 2013-10-22 | 2014-04-16 | 湖北弘毅建设有限公司 | Long-span pre-stressing I-shaped steel reinforced concrete superposed beam |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967219A (en) * | 2014-05-30 | 2014-08-06 | 陈胜民 | High-efficiency high-strength I-shaped twisted steel and application method thereof |
| CN105625735A (en) * | 2016-02-23 | 2016-06-01 | 成都科创佳思科技有限公司 | Construction auxiliary beam |
| CN107023082A (en) * | 2017-05-04 | 2017-08-08 | 浙江绿筑集成科技有限公司 | A kind of close rib steel hoop Prefabricated combined beam of H profile steel and steel reinforced concrete dry wall connecting node |
| CN107023082B (en) * | 2017-05-04 | 2022-09-16 | 浙江绿筑集成科技有限公司 | H-shaped steel multi-ribbed steel hoop prefabricated combination beam and steel-concrete prefabricated wall connecting node |
| CN109306766A (en) * | 2018-10-17 | 2019-02-05 | 中国铁路设计集团有限公司 | A kind of girder with rolled steel section en cased in concrete and its construction method of the slow bonding in part |
| CN114045743A (en) * | 2021-11-19 | 2022-02-15 | 中国建筑第八工程局有限公司 | Carbon fiber prestressed tendon T-shaped beam and preparation method thereof |
| CN114045743B (en) * | 2021-11-19 | 2024-03-19 | 中国建筑第八工程局有限公司 | Carbon fiber prestress tendon T-shaped beam and preparation method thereof |
| CN114809072A (en) * | 2022-03-31 | 2022-07-29 | 中铁第四勘察设计院集团有限公司 | Super-large span heavy-load underground space prestressed steel reinforced concrete top cover |
| CN114809072B (en) * | 2022-03-31 | 2023-12-01 | 中铁第四勘察设计院集团有限公司 | Underground space prestress steel reinforced concrete top cover under oversized span heavy load |
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Application publication date: 20140108 |