CN105625571B - The precast concrete bean column node of strength prestressed muscle in a kind of use - Google Patents
The precast concrete bean column node of strength prestressed muscle in a kind of use Download PDFInfo
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- CN105625571B CN105625571B CN201610112672.0A CN201610112672A CN105625571B CN 105625571 B CN105625571 B CN 105625571B CN 201610112672 A CN201610112672 A CN 201610112672A CN 105625571 B CN105625571 B CN 105625571B
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- precast concrete
- strength prestressed
- prestressed muscle
- node
- section
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/22—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material with parts being prestressed
Abstract
The invention discloses a kind of precast concrete bean column node of strength prestressed muscle in use, including precast concrete beam, precast concrete column, in section is poured after strength prestressed muscle, node region, longitudinal reinforcement in the common steel bar stress in back portion and column.Beam bottom portion strength prestressed muscle in being only furnished with, the presstressed reinforcing steel stretches out beam-ends, it crosses after prefabricated post center line and bends up to form crotch upwards, be reliably anchored in joint core region, the concrete poured into a mould after passing through together with precast concrete beam, column forms precast concrete bean column node.Present invention reduces production and difficulty of construction, alleviate the depth of section or steel using amount of precast concrete beam, ensure that the globality and anti-seismic performance of bean column node.
Description
Technical field
The present invention relates to a kind of precast concrete bean column node connecting structure of strength prestressed muscle in use, belong to building work
Journey precast concrete technical field.
Background technology
Frame structure is mainly built-up by beam, column and bean column node, belongs to one kind most widely used in architectural engineering
Structure type.Precast prestressed concrete prefabricated integral frame structure meets " building industrialization, housing industrialization " and green
The requirement of color building.It is excellent that such structural system has that speed of application is fast, environmental pollution is small, quality is guaranteed and durability is good etc.
Point also has convenient for using pre-tensioned prestressing technology, member section reduce, node construction is relatively simple, steel using amount is more low prominent
Go out feature.
The core technology of precast prestressed concrete prefabricated integral frame structure is precast concrete beam and concrete
The Joint's connection fabrication form of earth pillar, quality directly influence ultimate bearing capacity and anti-seismic performance of the class formation etc..At present
Beam-ends is equipped with keyway or U-shaped groove by existing pre-fabricated one bean column node interconnection technique, at the same equipped with presstressed reinforcing steel and
Regular reinforcement is aided with U-shaped steel muscle sometimes, mutually overlaps, is anchored in joint cores, and pours section using mixed behind node area
Solidifying soil is cast-in-place to form an entirety by precast concrete beam, column.Or high tensile reinforcement is used in beam bottom, and put in joint cores
Set additional bar, but there are costs it is larger, construction operation space is insufficient, ductility of joint performance is short of the deficiencies of.It is above pre-
Concrete frame joint interconnection technique processed has the problems such as applicability is insufficient, construction is inconvenient more, this makes precast prestressed mixed
The application advantage of solidifying soil prefabricated integral frame structure is not obvious.
How to build stress performance is good, construction measure rationally, construction easily New Types of Beam column Connections connecting structure, always
It is the technological difficulties of precast prestressed concrete prefabricated integral frame structure.
Invention content
Technical problem：Manufacture that difficulty is low, construction is convenient, type of attachment is simple, stress is bright the present invention provides one kind
The precast concrete bean column node of strength prestressed muscle in true use.
Technical solution：The precast concrete bean column node of strength prestressed muscle in the use of the present invention, including after node region
Section is poured, the precast concrete beam that the horizontal both ends of section are poured after the node region is set, section or more is poured in setting after node region
The precast concrete column at both ends, pours that composite beam top is provided with above section is cast-in-place after the precast concrete beam and node region
Region, described wish are furnished with longitudinal reinforcement, are furnished with common steel bar stress in the cast-in-place region in composite beam top in concrete column,
The bottom of precast concrete beam strength prestressed muscle in being only furnished with, strength prestressed muscle stretches out the end of precast concrete beam in described,
And continue to pour section after stretching into node region, more than bending up to form crotch upwards after the center line for pouring section after node region, it is anchored in section
Point pours behind region in section.
Further, in the present invention, the tensile strength of strength prestressed muscle is 700MPa~1300MPa in described, in described
Percentage of total elongation under the maximum, force of strength prestressed muscle is not less than 5%, and the diameter of strength prestressed muscle uses 6mm~30mm in described.
Further, the present invention in, in precast concrete beam, in strength prestressed muscle etc. strong transformed area AS convertsFor
0.2A′s~0.8A 's, wherein A 'sFor the total cross-sectional area of the common steel bar stress in top of the precast concrete beam, AS convertsRoot
According to the total cross-sectional area A of strength prestressed muscle in being furnished in precast concrete beamsIt is obtained through equal strong conversion.
Advantageous effect：Compared with prior art, the present invention has the following advantages：
(1) the common steel bar stress of configuration in conventional precast concrete beam, the span ability of beam is poor, and energy is crossed in order to improve
Power, precast prestressed concrete beam is interior to be furnished with presstressed reinforcing steel and common steel bar stress, to meet crack, the tensile stress of beams of concrete
Equal controls requirement, causes component cost higher, and in effective cast-in-place construction space, the connection of node region and construction operation are difficult
Degree is very big.And precast beam bottom is only furnished with strength prestressed muscle in preferable elongation in the present invention, need not additionally be configured
Common steel bar stress still reaches the bearing capacity and anti-seismic performance same with cast-in-place concrete frame structure, reduces prefabricated
The beam section or steel using amount of beam significantly reduce to cost, the difficulty of construction of component, have achieved the purpose that meterial saving and high efficiency.
(2) precast beam bottom need not configure common steel bar stress, on the one hand reduce precast concrete bean column node core
The complexity in heart district domain is conducive to the overlap joint connection between beam bottom portion steel bar stress, has on the other hand been significantly reduced prefabricated mixed
The making of solidifying soil beam, production difficulty, improve the convenience and high efficiency of site operation.
(3) beam bottom steel bar stress stretches out beam-ends and is folded upward at after crossing prefabricated post center line, can in joint core region
By anchoring, bean column node is formed through whole pour of concrete, under the premise of ensureing the globality and anti-seismic performance of bean column node, the company
Connect construction it is relatively simple, stress is clear.
Description of the drawings
Fig. 1 be the present invention use in strength prestressed muscle precast concrete bean column node connection diagram.
Fig. 2 is the sectional view in the cast-in-place region of precast concrete beam and composite beam top in Fig. 1.
Wherein：1 is precast concrete beam, and 2 be the cast-in-place region in top of composite beam, and 3 are furnished with for precast concrete beam bottom
In strength prestressed muscle, 4 be precast concrete column, and 5 is pour section behind prefabricated bean column node region, 6 for back portion it is common by
Power reinforcing bar, 7 be longitudinal reinforcement in prefabricated post, and 8 be stirrup.
Specific implementation mode
With reference to specific embodiment, and with reference to attached drawing, the present invention is described further：
Fig. 1 be the present invention use in strength prestressed muscle precast concrete bean column node connection signal, and Fig. 2 is corresponded to
The sectional view in the cast-in-place region of precast concrete beam and composite beam top in Fig. 1.As shown in Figure 1 and Figure 2, the strength prestressed muscle in
Precast concrete bean column node, including precast concrete beam 1, the cast-in-place region 2 in composite beam top, in strength prestressed muscle 3, prefabricated
Section 5 is poured after concrete column 4, node region, longitudinal reinforcement 7 in the common steel bar stress 6 in back portion and column.In Fig. 1, precast concrete
The bottom of beam 1 strength prestressed muscle 3 in being only furnished with, the presstressed reinforcing steel 3 stretches out beam-ends, and continues through precast concrete column 4
It bends up to form crotch upwards after center line, be poured in section 5 after being reliably anchored in bean column node region.The precast concrete beam 1,
In strength prestressed muscle 3 and precast concrete column 4 pass through after the concrete poured into a mould realize precast concrete beam and precast concrete column
Be reliably connected, and form precast concrete bean column node.
As shown in Figure 1, the tensile strength of strength prestressed muscle 3 is 700MPa~1300MPa, such as value in described
750Mpa, the percentage of total elongation in described under the maximum, force of strength prestressed muscle 3 are not less than 5%, the diameter of strength prestressed muscle 3 in described
Using 6mm~30mm.The intensity of traditional presstressed reinforcing steel is higher, but the percentage of total elongation under its maximum, force is relatively low (about 3.5%), far
Less than common steel bar stress, when only configuring high strength wire, anti-seismic performance is poor, therefore need to usually be aided with common stress steel
Muscle improves the ductility of precast concrete beam-ends plastic hinge region.And the present invention make full use of in strength prestressed muscle the advantages of, avoid matching
While setting common steel bar stress, still reach the bearing capacity and anti-seismic performance same with cast-in-place concrete frame structure, drops
The low beam section or steel using amount of precast beam significantly reduces to cost, the difficulty of construction of component, has reached the mesh of meterial saving and high efficiency
's.
As shown in Fig. 2, the bottom of every precast concrete beam 1 need not configure common steel bar stress, it is strong in being furnished with
The radical of presstressed reinforcing steel 3, strength grade all same, and it is described in strength prestressed muscle 3 etc. strong transformed area AS convertsFor 0.2A 's
~0.8A 's, wherein A 'sFor the total cross-sectional area of the common steel bar stress in top 6 of the precast concrete beam 1, AS convertsAccording to pre-
The total cross-sectional area A of strength prestressed muscle 3 in being furnished in beams of concrete 1 processedsIt is obtained through equal strong conversion.Its it is medium it is strong conversion refer to
When different grade of steel Reinforcement Replacements, replaces by the equal principle of intensity, need to consider the strength failure criterion of different reinforcing bars.When prefabricated
When beams of concrete 1 is applied to highly seismic region, it should still increase the common steel bar stress of setting；When depth of beam is higher, the both sides of beam are answered
Waist muscle is set, and stirrup 8 uses closed stirrup.The distribution of strength prestressed muscle 3 preferably disperses, is symmetrical in beam bottom；It is in joint core
Anchorage length and thickness of concrete cover in region should meet the relevant regulations of country's existing professional standard and national regulation
It is required that.
When site operation, after precast concrete beam 1 and precast concrete column 4 are lifted in place, by precast concrete beam 1
Both ends are held on the top both sides of precast concrete column 4, are aided with temporary support, template etc., by strength prestressed muscle in beam bottom portion
3, the common steel bar stress 6 in top, installation is complete for longitudinal reinforcement 7 and stirrup 8 in column, and uses concreting, formed prefabricated mixed
Solidifying soil bean column node.
Schematically the present invention and embodiments thereof are described above, description is not limiting, attached drawing 1 ---
It is one of embodiments of the present invention shown in Fig. 2.When presently disclosed connection type is applied to more generally frame knot
When structure bean column node, can according to practical beam-to-column joint mode (as Top-Exterior Columns of PC, top layer center pillar, layer side column etc.), to node
Strength prestressed muscle radical and distribution form appropriately adjust in region.Therefore, if others skilled in the art are without departing from this hair
In the case of bright creation objective, using means of structural connection similar with the technical solution and embodiment, the present invention should all be belonged to
Protection domain.
Claims (2)
1. the precast concrete bean column node of strength prestressed muscle in a kind of use, which is characterized in that the node includes node region
Section (5) is poured afterwards, the precast concrete beam (1) at section (5) horizontal both ends is poured in setting after the node region, is arranged in node region
The precast concrete column (4) of section (5) upper and lower ends is poured afterwards, and the upper of section (5) is poured after the precast concrete beam (1) and node region
Side is provided with the cast-in-place region in composite beam top (2), is furnished with longitudinal reinforcement (7), the composite beam in the precast concrete column (4)
It is furnished with common steel bar stress (6), strength prestressed muscle during the bottom of precast concrete beam (1) is only furnished in the cast-in-place region in top (2)
(3), strength prestressed muscle (3) stretches out the end of precast concrete beam (1) in described, and continues to pour section (5) after stretching into node region,
More than bending up to form crotch upwards after the center line for pouring section (5) after node region, poured in section (5) after being anchored in node region；
The tensile strength of strength prestressed muscle (3) is 700MPa~1300MPa, the maximum of strength prestressed muscle (3) in described in described
Percentage of total elongation under power is not less than 5%, and the diameter of strength prestressed muscle (3) uses 6mm~30mm in described.
2. the precast concrete bean column node of strength prestressed muscle in use according to claim 1, which is characterized in that described
In precast concrete beam (1), in strength prestressed muscle (3) etc. strong transformed area AS convertsFor 0.2A 's~0.8A 's, wherein A 'sFor
The total cross-sectional area of the common steel bar stress in top (6) of the precast concrete beam (1), AS convertsAccording to precast concrete beam (1)
The total cross-sectional area A of strength prestressed muscle (3) in being inside furnished withsIt is obtained through equal strong conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610112672.0A CN105625571B (en) | 2016-02-29 | 2016-02-29 | The precast concrete bean column node of strength prestressed muscle in a kind of use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610112672.0A CN105625571B (en) | 2016-02-29 | 2016-02-29 | The precast concrete bean column node of strength prestressed muscle in a kind of use |
Publications (2)
| Publication Number | Publication Date |
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| CN105625571A CN105625571A (en) | 2016-06-01 |
| CN105625571B true CN105625571B (en) | 2018-08-21 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107090908B (en) * | 2017-05-09 | 2019-11-19 | 广东省建筑科学研究院集团股份有限公司 | A kind of vertical prefabricated components joint connecting method |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0699963B2 (en) * | 1988-03-16 | 1994-12-12 | 株式会社フジタ | Prestressed RPC method and prestressed PC columns with beams |
| CN202672335U (en) * | 2012-06-28 | 2013-01-16 | 华汇工程设计集团股份有限公司 | Pre-tensioned prestressing superposed beam building structural system |
| CN103195172B (en) * | 2013-04-16 | 2015-09-09 | 东南大学 | A kind of prefabrication and assembly construction concrete frame beam-column connection structure |
| CN203866982U (en) * | 2014-05-28 | 2014-10-08 | 江苏尚昇建设集团有限公司 | Prefabricated beam end joint structure |
| CN105256891B (en) * | 2015-09-17 | 2018-02-06 | 东南大学 | High-strength bottom muscle Precast Concrete Frame |
| CN205591349U (en) * | 2016-02-29 | 2016-09-21 | 东南大学 | Strong prestressing tendons's precast concrete beam post node in adoption |
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