CN203547017U - 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 PDF

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Publication number
CN203547017U
CN203547017U CN201320652567.8U CN201320652567U CN203547017U CN 203547017 U CN203547017 U CN 203547017U CN 201320652567 U CN201320652567 U CN 201320652567U CN 203547017 U CN203547017 U CN 203547017U
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CN
China
Prior art keywords
steel
concrete
shaped steel
shaped
span
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CN201320652567.8U
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Chinese (zh)
Inventor
罗泽平
王少重
吴小银
周少勋
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湖北弘毅建设有限公司
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Priority to CN201320652567.8U priority Critical patent/CN203547017U/en
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Publication of CN203547017U publication Critical patent/CN203547017U/en

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Abstract

The utility model 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 steel rib, a prefabricated concrete steel rib lower beam and a cast-in-place concrete steel rib upper beam, wherein 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 part of the I-shaped structural steel top flange board and the lower part 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

A kind of large-span prestressed I shape steel concrete composite girder

Technical field

A kind of large-span prestressed I shape steel concrete composite girder of the utility model, belongs to building structure field.

Background technology

According to Code for design of concrete structures, in normal reinforced concrete beam span-depth radio, be limited to 15, 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; Along with depth of beam increases steel section size, increase and mostly adopt real web formed steel construction steel using amount large, minority web perforate shaped steel is made again complexity, and compound beam span when larger structure easily there is crack.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.

Utility model content

The purpose of this utility model is to provide a kind of large-span prestressed I shape steel concrete composite girder, to improve intensity, the rigidity of superposed beam, alleviates the deadweight of superposed beam body, adapts to long span building and increases the demand that building is effectively used height; And the prefabricated degree of this superposed beam batch production is high, so reduce site operation difficulty, promote site operation efficiency.

The utility model is achieved through the following technical solutions:

A kind of large-span prestressed I shape steel concrete composite girder, by 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, longitudinal medial plain bars is set respectively, by spaced longitudinally interior stirrup hoop, be connected into cage, in bottom wing listrium both sides, be symmetrical arranged outside plain bars, 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, in 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, 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 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, is 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 utility model, its girder steel height is larger, transverse reinforcement hoop can pass completely through the perforation in web, after concreting, form carrying platform 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 is closely connected with concrete; Weld stud on i-shaped beams frange plate, has 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 utility model 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.

Accompanying drawing explanation

Fig. 1 the utility model superposed beam schematic perspective view;

Fig. 2 the utility model perforation shape web i shaped steel schematic diagram;

Fig. 3 the utility model i shaped steel and reinforcing bar binding complete schematic diagram;

Fig. 4 the utility model precast concrete reinforcing bar lower beam schematic diagram;

Fig. 5 the utility model cast-in-situ concrete reinforcing bar 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 utility model.

A kind of large-span prestressed I shape steel concrete composite girder of the utility model, by 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 vertical reinforcement cage by spaced longitudinally interior stirrup 3-1 hoop, in i iron web both sides, be symmetrical arranged outside plain bars 1-1, by walking around outside plain bars and be connected into transverse reinforcement cage through the laterally outer stirrup 1-2 hoop of shape steel web sawtooth hole, then forming the reinforcing cage being 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 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), in 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 take and put after precast floor slab B at the both sides of moulding prefabricated concrete reinforcing bar lower beam 1 platform P, 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, is 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 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, longitudinal medial plain bars is set respectively, by spaced longitudinally interior stirrup hoop, be connected into cage, in bottom wing listrium both sides, be symmetrical arranged outside plain bars, 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, in 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, 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, is characterized in that, the corresponding through hole through i shaped steel two ends stiffener in 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, 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, is characterized in that, perforation shape web i shaped steel two ends stiffener, is connected with respectively H shaped steel connector, and this H shaped steel connector web has connecting hole.
CN201320652567.8U 2013-10-22 2013-10-22 Long-span pre-stressing I-shaped steel reinforced concrete superposed beam CN203547017U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320652567.8U CN203547017U (en) 2013-10-22 2013-10-22 Long-span pre-stressing I-shaped steel reinforced concrete superposed beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320652567.8U CN203547017U (en) 2013-10-22 2013-10-22 Long-span pre-stressing I-shaped steel reinforced concrete superposed beam

Publications (1)

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CN203547017U true CN203547017U (en) 2014-04-16

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103498531A (en) * 2013-10-22 2014-01-08 湖北弘毅建设有限公司 Long-span pre-stressing I-shaped steel reinforced concrete superposed beam
CN106437027A (en) * 2016-10-25 2017-02-22 华侨大学 Anti-bending shear-resistant anti-vibration self-adaptive type combined connecting beam and processing method thereof
CN109537806A (en) * 2018-11-21 2019-03-29 江南大学 A kind of " T-type " partial precast combination beam
CN109537804A (en) * 2018-11-21 2019-03-29 江南大学 A kind of partial precast shape steel-concrete combined beam and its construction method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103498531A (en) * 2013-10-22 2014-01-08 湖北弘毅建设有限公司 Long-span pre-stressing I-shaped steel reinforced concrete superposed beam
CN106437027A (en) * 2016-10-25 2017-02-22 华侨大学 Anti-bending shear-resistant anti-vibration self-adaptive type combined connecting beam and processing method thereof
CN109537806A (en) * 2018-11-21 2019-03-29 江南大学 A kind of " T-type " partial precast combination beam
CN109537804A (en) * 2018-11-21 2019-03-29 江南大学 A kind of partial precast shape steel-concrete combined beam and its construction method

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EXPY Termination of patent right or utility model
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Granted publication date: 20140416

Termination date: 20151022