CN105256891A - Prefabricated concrete frame structure with high-strength bottom bars - Google Patents

Prefabricated concrete frame structure with high-strength bottom bars Download PDF

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Publication number
CN105256891A
CN105256891A CN201510596055.8A CN201510596055A CN105256891A CN 105256891 A CN105256891 A CN 105256891A CN 201510596055 A CN201510596055 A CN 201510596055A CN 105256891 A CN105256891 A CN 105256891A
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China
Prior art keywords
precast concrete
core
strength
steel bar
rebars
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CN201510596055.8A
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Chinese (zh)
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CN105256891B (en
Inventor
郭正兴
管东芝
刘家彬
于建兵
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东南大学
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Abstract

The invention discloses a prefabricated concrete frame structure with high-strength bottom bars. The prefabricated concrete frame structure with the high-strength bottom bars comprises prefabricated concrete columns, prefabricated concrete beams, beam bottom stressed rebars, U-shaped key slots, core beam rack vertical bars, rectangular closed stirrups, core beams and beam top common rebars, wherein the U-shaped key slots are reserved in beam ends of the prefabricated concrete beams; the beam bottom stressed rebars are high-strength rebars; the core beam rack vertical bars are arranged in ranges of the U-shaped key slots above the beam bottom stressed rebars; the rectangular closed stirrups which surround the beam bottom stressed rebars are arranged in the U-shaped key slots through the core beam rack vertical bars so as to form the core beams; the beam bottom stressed rebars extend out of the beam end and are bent upwards to form hooks; and extension portions are bent laterally to avoid prefabricated concrete column main bars, and are anchored in a beam column connecting joint core region. The anti-seismic property of a prefabricated assembly frame structure is improved, universality of production of components and installation of field joints is improved, and the prefabricated concrete frame structure with the high-strength bottom bars conforms to a general trend of popularization and use of high-strength rebars.

Description

Muscle Precast Concrete Frame of the high-strength end

Technical field

The present invention relates to muscle Precast Concrete Frame of a kind of high-strength end, belong to construction work concrete frame structure technical field.

Background technology

Precast concrete can significantly improve construction ability and construction speed, save a large amount of labour, ensure build guality, and be conducive to the requirement reaching " four joint one environmental protection ", go into overdrive to carry out " industrialization of construction industry, housing industrialization " in country, under promoting the background of green building and green construction, there is good development prospect.The prefabrication and assembly construction frame structure system ubiquity that can be put at present apply the problems such as precision processing request is high, applicability is not enough, construction is inconvenient, and this makes prefabrication and assembly construction frame construction application advantage and not obvious.

Summary of the invention

The object of the invention is to the bottleneck overcoming existing Precast Concrete Frame scale application; muscle Precast Concrete Frame of a kind of high-strength end is provided; this structure can reduce required precision prefabricated units being manufactured to steel bar stress layout in central sill; improve the universality of the production of prefabrication and assembly construction frame structure component and on-the-spot node installation, effectively solve the problem.

The technical solution used in the present invention is: muscle Precast Concrete Frame of a kind of high-strength end, comprises steel bar stress bottom precast concrete column, precast concrete beam, beam, U-shaped keyway, core roof beam structure stud, rectangular tight stirrup, core beam and back plain bars;

Described precast concrete column is configured with vertical reinforcement, and described precast concrete beam is shelved on the concrete cover of precast concrete column, forms beam-column connection;

The beam-ends of described precast concrete beam leaves U-shaped keyway and bottom beam, steel bar stress adopts high tensile reinforcement, core roof beam structure stud is provided with within the scope of U-shaped keyway above steel bar stress bottom described beam-ends, in U-shaped keyway, set up the rectangular tight stirrup around steel bar stress bottom beam by core roof beam structure stud, form core beam;

Bottom described beam, steel bar stress stretches out beam-ends, and upwards bends up formation crotch, and extension lateral bending avoids the main muscle of precast concrete column, is anchored in beam-column connection core space;

Described precast concrete beam installs back plain bars, and together with whole beam-column connection region cast-in-situ concrete, forms assembled integral connected node.

As preferably, bottom described beam, steel bar stress adopts 600MPa level high tensile reinforcement, diameter takes 12mm to 16mm, high tensile reinforcement stretches out beam-ends certain length above trough floor, end upwards bends up formation crotch, it is bending flexibly that beam-ends high tensile reinforcement can utilize its flexibility to do from U-lag starting point, can avoid post muscle smoothly and anchor in node area, facilitate the prefabricated and on-the-spot node installation of beam in node installation process.

As preferably, arrange the steel bar welding net with diaphragms effect in the concrete cover bottom described beam between steel bar stress to component epidermis, improve span centre crack developing situation.

As preferably, the reasonable altitudes of described beam-column connection both sides U-shaped keyway and joint cores places additional straight reinforcing bar, strengthen the bending resistance of beam column piece face place beam-ends, make its plastic hinge under earthquake cyclic reverse loading realize outer moving.

Beneficial effect: (1) the present invention adopts high tensile reinforcement as the precast concrete beam of bottom steel bar stress, can reduce beam steel using amount or reduce beam section, reaching the object of saving material; (2) prefabricated beam-ends arranges certain length U-shaped groove, and groove inner concrete and node concrete monobloc cast, improve the shearing resistance on beam column mating face.In addition, the setting of groove, can increase the free bend segment length of high-strength muscle, utilizes the flexibility of small-sized high tensile reinforcement to carry out spatial intersecting bending easily, the construction difficult problem that when thoroughly solution precast beam is in place, at the bottom of different directions beam, reinforcing bar and post muscle easily collide; (3) continuous, the monobloc cast of node concrete of back reinforcing bar, the reinforcement of beam keyway inner core beam part, realize strong ties node, can give full play to and improve the shock resistance of frame construction.

Accompanying drawing explanation

Fig. 1 is precast concrete beam schematic diagram of the present invention;

Fig. 2 is the sectional view of Fig. 1;

Fig. 3 is connected node schematic diagram of the present invention;

Fig. 4 is the sectional view of Fig. 3.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is further illustrated.

As illustrated in fig. 1 and 2: muscle Precast Concrete Frame precast beam of the high-strength end; two ends arrange U-shaped keyway 1; bottom beam, steel bar stress 2 adopts 12mm, 14mm, 16mm small-sized 600MPa level heat treatment high tensile reinforcement with ribbing with certain flexibility; stretch out at beam link; upwards bend up formation crotch; on high-strength muscle top, core roof beam structure stud 3 is set; for the formation of core beam; by arranging the steel bar welding net 4 with diaphragms effect in the concrete cover of advocating between muscle to component epidermis at the bottom of beam, improve cracking situation in position in girder span.

As shown in Figures 3 and 4: muscle Precast Concrete Frame connected node of the high-strength end, after being configured with precast concrete column 5 installation in position of vertical reinforcement, precast concrete beam 6 is lifted and is shelved on precast concrete column 5 concrete cover temporarily, bottom beam-ends, steel bar stress 2 is according to the physical location of on-the-spot post vertical reinforcement, manually be bent to form interlaced arrangement, stretch into node area and carry out anchoring, the small rectangular closed stirrup 7 around high-strength muscle is set up in beam paragraph key groove, form core beam 8, in node both sides U-lag and joint cores, certain altitude puts additional straight reinforcing bar 9 again, back plain bars 10 is inserted in beam stirrup, and colligation is fixed, last cast in situs node area concrete 11, form fabricated assembly overall beam-column connection.

Below by reference to the accompanying drawings embodiments of the present invention are described in detail, but the present invention is not limited to described embodiment.For those of ordinary skill in the art, in the scope of principle of the present invention and technological thought, embodiment is carried out to these embodiments and carries out multiple change, amendment, replacement and distortion and still fall within the scope of protection of the present invention.

Claims (4)

1. the muscle Precast Concrete Frame of the high-strength end, is characterized in that: comprise steel bar stress bottom precast concrete column, precast concrete beam, beam, U-shaped keyway, core roof beam structure stud, rectangular tight stirrup, core beam and back plain bars;
Described precast concrete column is configured with vertical reinforcement, and described precast concrete beam is shelved on the concrete cover of precast concrete column, forms beam-column connection;
The beam-ends of described precast concrete beam leaves U-shaped keyway and bottom beam, steel bar stress adopts high tensile reinforcement, core roof beam structure stud is provided with within the scope of U-shaped keyway above steel bar stress bottom described beam, in U-shaped keyway, set up the rectangular tight stirrup around steel bar stress bottom beam by core roof beam structure stud, form core beam;
Bottom described beam, steel bar stress stretches out beam-ends, and upwards bends up formation crotch, and extension lateral bending avoids the main muscle of precast concrete column, is anchored in beam-column connection core space;
Described precast concrete beam installs back plain bars, and together with whole beam-column connection region cast-in-situ concrete, forms assembled integral connected node.
2. muscle Precast Concrete Frame of the high-strength end according to claim 1, is characterized in that: bottom described beam, steel bar stress adopts 600MPa level high tensile reinforcement, and high tensile reinforcement diameter adopts 12mm to 16mm.
3. muscle Precast Concrete Frame of the high-strength end according to claim 1, is characterized in that: arrange the steel bar welding net with diaphragms effect in the concrete cover bottom described beam between steel bar stress to component epidermis.
4. muscle Precast Concrete Frame of the high-strength end according to claim 1, is characterized in that: additional straight reinforcing bar is placed in the top of described beam-column connection both sides U-shaped keyway and joint cores.
CN201510596055.8A 2015-09-17 2015-09-17 High-strength bottom muscle Precast Concrete Frame CN105256891B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510596055.8A CN105256891B (en) 2015-09-17 2015-09-17 High-strength bottom muscle Precast Concrete Frame

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CN105256891B CN105256891B (en) 2018-02-06

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105625573A (en) * 2016-02-29 2016-06-01 东南大学 Beam-bottom medium-strength prestressed steel bar and ordinary steel bar sleeve connecting beam-column joint
CN105625571A (en) * 2016-02-29 2016-06-01 东南大学 Prefabricated concrete beam-column joint using medium-strength prestressed tendons
CN105625572A (en) * 2016-02-29 2016-06-01 东南大学 Prefabricated prestressed concrete frame beam-column joint making disparate use of high performance materials
CN105649203A (en) * 2016-02-29 2016-06-08 东南大学 Prefabricated prestressed concrete frame beam column joint with U-shaped steel bar and sleeves
CN105735470A (en) * 2016-02-29 2016-07-06 东南大学 Precast concrete frame system using high-performance materials differentially
CN105951984A (en) * 2016-05-24 2016-09-21 东南大学 High-ductility assembled integral type frame exterior joint connection structure and construction method thereof
CN106013432A (en) * 2016-05-24 2016-10-12 东南大学 Joint connecting structure in high-ductility assembled integrated frame and construction method
CN106948481A (en) * 2017-05-02 2017-07-14 扬州大学 Prefabrication and assembly construction concrete frame beam-column connection based on the high strengthening tendons in part
CN107119802A (en) * 2017-05-19 2017-09-01 中国建筑第八工程局有限公司 The connection method of covering steel plate
CN110241915A (en) * 2019-05-07 2019-09-17 济南大学 A kind of assembly concrete beam column L-type muscle integrated connection node and application method

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105649203B (en) * 2016-02-29 2018-07-17 东南大学 Precast prestressed concrete frame bean column node with U-shaped muscle and sleeve
CN105625571A (en) * 2016-02-29 2016-06-01 东南大学 Prefabricated concrete beam-column joint using medium-strength prestressed tendons
CN105625572A (en) * 2016-02-29 2016-06-01 东南大学 Prefabricated prestressed concrete frame beam-column joint making disparate use of high performance materials
CN105649203A (en) * 2016-02-29 2016-06-08 东南大学 Prefabricated prestressed concrete frame beam column joint with U-shaped steel bar and sleeves
CN105735470A (en) * 2016-02-29 2016-07-06 东南大学 Precast concrete frame system using high-performance materials differentially
CN105625573A (en) * 2016-02-29 2016-06-01 东南大学 Beam-bottom medium-strength prestressed steel bar and ordinary steel bar sleeve connecting beam-column joint
CN105625572B (en) * 2016-02-29 2018-05-15 东南大学 Distinctiveness uses the precast prestressed concrete frame bean column node of high performance material
CN105951984A (en) * 2016-05-24 2016-09-21 东南大学 High-ductility assembled integral type frame exterior joint connection structure and construction method thereof
CN106013432A (en) * 2016-05-24 2016-10-12 东南大学 Joint connecting structure in high-ductility assembled integrated frame and construction method
CN106013432B (en) * 2016-05-24 2019-05-17 东南大学 A kind of high ductility prefabricated integral frame interior joint connection structure and construction method
CN106948481A (en) * 2017-05-02 2017-07-14 扬州大学 Prefabrication and assembly construction concrete frame beam-column connection based on the high strengthening tendons in part
CN106948481B (en) * 2017-05-02 2019-05-07 扬州大学 Prefabrication and assembly construction concrete frame beam-column connection based on the high strengthening tendons in part
CN107119802A (en) * 2017-05-19 2017-09-01 中国建筑第八工程局有限公司 The connection method of covering steel plate
CN110241915A (en) * 2019-05-07 2019-09-17 济南大学 A kind of assembly concrete beam column L-type muscle integrated connection node and application method

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