CN105649203B - Precast prestressed concrete frame bean column node with U-shaped muscle and sleeve - Google Patents

Precast prestressed concrete frame bean column node with U-shaped muscle and sleeve Download PDF

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Publication number
CN105649203B
CN105649203B CN201610111965.7A CN201610111965A CN105649203B CN 105649203 B CN105649203 B CN 105649203B CN 201610111965 A CN201610111965 A CN 201610111965A CN 105649203 B CN105649203 B CN 105649203B
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China
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precast
bean column
column node
reinforcing bar
concrete
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CN105649203A (en
Inventor
冯健
刘亚非
金如元
陈耀
庞涛
蔡建国
刘立新
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Southeast University
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Southeast University
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19Three-dimensional framework structures
    • E04B1/1903Connecting nodes specially adapted therefor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21Connections specially adapted therefor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/22Structures 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
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/58Connections for building structures in general of bar-shaped building elements

Abstract

The invention discloses a kind of precast prestressed concrete frame bean column nodes with U-shaped muscle and sleeve, mainly including longitudinal reinforcement, U-shaped reinforcing bar, anti-seismic steel bar and its branch sleeve in precast concrete beam, precast concrete column, precast beam bottom presstressed reinforcing steel and the common steel bar stress of common steel bar stress, back, column.Section is poured after the both ends of precast beam are reserved, the presstressed reinforcing steel that precast beam bottom is furnished with stretches out beam-ends and pours section after being anchored in beam-ends, and the concrete poured into a mould after passing through together with prefabricated beam column forms precast concrete bean column node.The common steel bar stress that beam bottom portion is stretched out is connected with each other by sleeve and anti-seismic steel bar, and setting U-shaped reinforcing bar in region is poured after node, to reinforce the globality of this 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

Precast prestressed concrete frame bean column node with U-shaped muscle and sleeve
Technical field
The present invention relates to a kind of precast prestressed concrete frame beam-column joint connecting structure with U-shaped muscle and sleeve, Belong to civil engineering 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 structural system meet " building industrialization, housing industrialization " and The requirement of green building.Such structural system has speed of application is fast, environmental pollution is small, quality is guaranteed and durability is good etc. Advantage, also with pre-tensioned prestressing technology, member section reduces, node construction is relatively simple, steel using amount is more low convenient for using Outstanding 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 true precast prestressed concrete frame bean column node with U-shaped muscle and sleeve.
Technical solution:The precast prestressed concrete frame bean column node with U-shaped muscle and sleeve of the present invention, including beam Section is poured after Column border node, is arranged and is poured the precast concrete beam at the horizontal both ends of section after the bean column node, is arranged after bean column node The precast concrete column of section upper and lower ends is poured, pours after the precast concrete beam and bean column node and is provided on composite beam above section The cast-in-place region in portion pours after the bean column node and is furnished with U-shaped reinforcing bar and the connection reinforcing bar on the downside of U-shaped reinforcing bar in section, described pre- It is furnished with longitudinal reinforcement in concrete column processed, is furnished with common steel bar stress at the top of precast beam in the cast-in-place region in composite beam top, The bottom of precast concrete beam is furnished with the common steel bar stress in precast beam bottom and presstressed reinforcing steel, and the presstressed reinforcing steel stretches out beam-ends simultaneously Section is poured after stretching into bean column node, bends up to form crotch upwards along column direction, is poured in section after being anchored in bean column node region, it is described pre- The common steel bar stress in beam bottom portion processed by branch sleeve with connect bar connecting.
Further, in bean column node of the invention, precast beam bottom that the branch sleeve both ends are connected commonly by Power reinforcing bar and connection reinforcing bar diameter differ, the tensile bearing capacity standard value of branch sleeve should be greater than or equal to connect it is prefabricated The length of 1.1 times of the tensile capacity standard value of the common steel bar stress in beam bottom portion and connection reinforcing bar, branch sleeve is precast beam 2~15 times of the diameter of the common steel bar stress in bottom and connection reinforcing bar.
Further, in bean column node of the invention, poured in section after bean column node, U-shaped reinforcing bar etc. strong transformed area AS convertsFor 0.2A 's~0.8A 's, wherein A 'sFor the total cross-sectional area of common steel bar stress at the top of precast beam, AS convertsAccording to beam column section The total cross-sectional area A for the U-shaped reinforcing bar being furnished in section is poured after pointsIt is obtained through equal strong conversion;
The area of section A of the connection reinforcing barseFor 0.1A 's~0.5A 's
Further, in bean column node of the invention, the length in reserve of section, i.e. precast concrete column side are poured after bean column node It is overlapping concrete depth of beam that the level interval of edge and precast concrete beam end, which is using 0.5h~2h, wherein h, i.e., prefabricated The sum of the height in the cast-in-place region of beams of concrete and composite beam top.
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 section is poured at precast beam both ends there are after in the present invention, it is only necessary to additional configuring u reinforcing bar, and by the common stress of both sides Reinforcing bar effectively connects, and has reached the bearing capacity and anti-seismic performance same with cast-in-place concrete frame structure, has reduced precast beam Beam section or steel using amount achieved the purpose that meterial saving and high efficiency to which the cost of component, difficulty of construction significantly reduce.
(2) it when steel bar stress is connected with each other in traditional precast concrete beam, is connected using welding or binding, is existed Disadvantage.Binding connection easily causes Joint failure, and narrow space operation difficulty is big, and the equipment volume being welded to connect is larger, mobile It is inconvenient, connector qualification rate is low, more demanding to the technology of operator, in operation welding quality by worker's technical merit influenced compared with Greatly.Using the sleeve that can connect different-diameter connection reinforcing bar in the present invention.Therefore, on the one hand this technology reduces precast concrete The complexity that steel bar stress connects in the domain of beam column node core area is conducive to being reliably connected between beam bottom portion steel bar stress, separately On the one hand it has been significantly reduced making, the production difficulty of precast concrete beam, has improved the convenience and height of site operation Effect property.
(3) connection usually at precast concrete bean column node is weaker, and Seismic Behavior is poor, and the present invention is prefabricated The both ends and joint core region position of beam be configured with U-shaped reinforcing bar, together with the common steel bar stress in the bottom being connected with each other After pour it is whole in section pour to form bean column node, ensure bean column node globality and anti-seismic performance under the premise of, the connecting structure Relatively simple, stress is clear.
Description of the drawings
Fig. 1 is the precast prestressed concrete frame bean column node connection diagram with U-shaped muscle and sleeve of the present invention.
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 be the common stress steel in precast beam bottom Muscle, 4 be precast concrete column, and 5 be branch sleeve, and 6 answer to pour section after precast concrete bean column node, 7 for precast beam bottom in advance Power muscle, 8 be U-shaped reinforcing bar, and 9 be longitudinal reinforcement in prefabricated post, and 10 want for common steel bar stress at the top of precast beam, 11 to meet antidetonation The connection reinforcing bar asked, 12 be stirrup.
Specific implementation mode
With reference to specific embodiment, and with reference to attached drawing, the present invention is described further:
Fig. 1 is the precast prestressed concrete frame bean column node signal with U-shaped muscle and sleeve of the present invention, and Fig. 2 Correspond 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, a kind of to carry U-shaped The precast prestressed concrete frame bean column node of muscle and sleeve, mainly by precast concrete beam 1, the cast-in-place region in composite beam top 2, the common steel bar stress 3 in precast beam bottom, precast concrete column 4, branch sleeve 5, precast beam both ends bean column node after pour section 6, precast beam bottom presstressed reinforcing steel 7, U-shaped reinforcing bar 8, longitudinal reinforcement 9 in prefabricated post, common steel bar stress 10 at the top of precast beam, full The connection reinforcing bar 11 of sufficient shockproof requirements.Section 6 is poured after the both ends of the precast concrete beam 1 are reserved, 1 bottom of precast beam is equipped with general Logical reinforcing bar 3 and presstressed reinforcing steel 7, wherein presstressed reinforcing steel 7 stretch out beam-ends and by pouring section 6 after beam-ends after, bent up upwards along column direction Crotch is formed, is poured in section 6 after being anchored in bean column node region.
As shown in Figure 1, the common steel bar stress 3 in precast beam bottom that the both ends of the branch sleeve 5 are connected and connection The diameter of reinforcing bar 11 can differ.The tensile bearing capacity standard value of the branch sleeve 5 should be greater than or prefabricated equal to what is connected 1.1 times of the tensile capacity standard value of the common steel bar stress 3 in beam bottom portion and connection reinforcing bar 11, the length of branch sleeve 5 is pre- 2~15 times of the diameter of the common steel bar stress 3 in beam bottom portion processed and connection reinforcing bar 11.
The precast prestressed concrete frame bean column node with U-shaped muscle and sleeve described in Fig. 1, should pour after node Setting U-shaped reinforcing bars 8 in section 6,8 both ends of U-shaped reinforcing bar bend up the shape that takes the shape of the letter U upwards, preferably make precast concrete beam 1, pre- Concrete column 4 processed is connected to become an entirety.To ensure equal strength design, the material of the U-shaped reinforcing bar 8 being furnished with, strength grade with The common steel bar stress 3 in precast beam bottom is identical, and the U-shaped reinforcing bar 8 and the described connection reinforcing bar 11 for meeting shockproof requirements Total cross-sectional area AsBy the area A waited after being converted into the area of back regular reinforcement by forceS convertsFor 0.2A 's~0.8A 's, wherein A′sFor the total cross-sectional area of common steel bar stress 10 at the top of precast beam.Herein, it refers to different grade of steel Reinforcement Replacements to wait strong conversion When, it replaces by the equal principle of intensity, need to consider the strength failure criterion of different reinforcing bars.The anchorage length of U-shaped reinforcing bar 8 and mixed Solidifying protective soil layer thickness should meet the relevant regulatory requirements of country's existing professional standard and national regulation.The antidetonation that meets is wanted The area of section A for the connection reinforcing bar 11 askedseFor 0.1A 's~0.5A 's, radical is preferably identical as regular reinforcement 3.
It may be noted that being connected with branch sleeve 5 in Fig. 1 and meeting the connection reinforcing bar 11 of shockproof requirements and U-shaped reinforcing bar 8 is not only answered Meet the related performance indicators requirement of regular reinforcement, it is also necessary to meet three requirements in terms of antidetonation, i.e.,:Reinforcing bar 11 and U-shaped steel The ratio between actual measurement tensile strength and actual measurement yield strength of muscle 8 are not less than 1.25, the actual measurement yield strength of reinforcing bar 11 and U-shaped reinforcing bar 8 It is not more than 1.30 with the ratio between common hot-rolled reinforced bar characteristic strength value, the percentage of total elongation under the maximum, force of reinforcing bar 11 and U-shaped reinforcing bar 8 Not less than 9%.When the height of precast concrete beam 1 is higher, waist muscle should be arranged in the both sides of beam, and stirrup 12 preferably uses closing ring Muscle.The distribution of the common steel bar stress 3 in precast beam bottom and presstressed reinforcing steel 7 preferably disperses, is symmetrical;Its anchorage length and concrete protective Layer thickness should meet the relevant regulatory requirements of country's existing professional standard and national regulation.
Before precast beam 1 and prefabricated post 4 lift, temporary support, template etc. are first set up, and support height is adjusted according to design requirement Degree, the position to ensure precast concrete beam 1 and precast concrete column 4 are accurate.When site operation, by precast concrete beam The post-cast strip 6 at 1 both ends is provided with template, by common steel bar stress 10, stirrup 12 at the top of the presstressed reinforcing steel 7 in beam bottom portion, precast beam Installation is complete with longitudinal reinforcement in column 9, as shown in Fig. 2, and being poured simultaneously using concrete, formation precast concrete beam column section Point.
Schematically the present invention and embodiments thereof are described above, description is not limiting, attached drawing 1-- figures It is one of embodiments of the present invention shown in 2.When presently disclosed connection type is applied to more generally precast frame When Structure Beam-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 section U-shaped reinforcing bar, sleeve, presstressed reinforcing steel radical and the distribution form that section is poured behind point region appropriately adjust.Therefore, if other technologies Personnel are without departing from the invention objective, using means of structural connection similar with the technical solution and implementation Example, is within the scope of protection of the invention.

Claims (4)

1. a kind of precast prestressed concrete frame bean column node with U-shaped muscle and sleeve, which is characterized in that the node includes Section (6) is poured after bean column node, the precast concrete beam (1) at section (6) horizontal both ends is poured in setting after the bean column node, setting exists The precast concrete column (4) of section (6) upper and lower ends is poured after bean column node, is poured after the precast concrete beam (1) and bean column node Be provided with the cast-in-place region in composite beam top (2) above section (6), poured after the bean column node in section (6) equipped with U-shaped reinforcing bar (8) and Connection reinforcing bar (11) on the downside of U-shaped reinforcing bar (8), the precast concrete column (4) is interior equipped with longitudinal reinforcement (9), described folded Equipped with common steel bar stress (10) at the top of precast beam in the cast-in-place region in the tops He Liang (2), the bottom of precast concrete beam (1) is furnished with The common steel bar stress in precast beam bottom (3) and presstressed reinforcing steel (7), the presstressed reinforcing steel (7) stretch out beam-ends and stretch into bean column node After pour section (6), bend up to form crotch upwards along column direction, be anchored in behind bean column node region and pour in section (6), the precast beam bottom The common steel bar stress in portion (3) is connected by branch sleeve (5) with reinforcing bar (11) is connect.
2. the precast prestressed concrete frame bean column node according to claim 1 with U-shaped muscle and sleeve, feature It is, the diameter of the common steel bar stress in precast beam bottom (3) and connection reinforcing bar (11) that branch sleeve (5) both ends are connected It differs, the tensile bearing capacity standard value of the branch sleeve (5) should be greater than or be equal to the connected common stress in precast beam bottom The length of 1.1 times of the tensile capacity standard value of reinforcing bar (3) and connection reinforcing bar (11), branch sleeve (5) is precast beam bottom 2~15 times of the diameter of common steel bar stress (3) and connection reinforcing bar (11).
3. the precast prestressed concrete frame bean column node according to claim 1 with U-shaped muscle and sleeve, feature Be, poured after the bean column node in section (6), U-shaped reinforcing bar (8) etc. strong transformed area AS convertsFor 0.2A 's~0.8A 's, wherein A 'sFor the total cross-sectional area of common steel bar stress (10) at the top of precast beam, AS convertsAccording to pouring the U being furnished in section (6) after bean column node The total cross-sectional area A of shape reinforcing bar (8)sIt is obtained through equal strong conversion;
The area of section A of the connection reinforcing bar (11)seFor 0.1A 's~0.5A 's
4. the precast prestressed concrete frame bean column node according to claim 1,2 or 3 with U-shaped muscle and sleeve, It is characterized in that, pour the length in reserve of section (6) after the bean column node, i.e. precast concrete column (4) edge and precast concrete It is overlapping concrete depth of beam, i.e. precast concrete beam (1) that the level interval of beam (1) end, which is using 0.5h~2h, wherein h, With the sum of the height in the cast-in-place region in composite beam top (2).
CN201610111965.7A 2016-02-29 2016-02-29 Precast prestressed concrete frame bean column node with U-shaped muscle and sleeve Active CN105649203B (en)

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CN105926771B (en) * 2016-06-17 2019-01-22 中国十七冶集团有限公司 A kind of the interior joint connection structure and its construction method of prefabricated integral frame column beam
CN105951986B (en) * 2016-06-17 2019-01-22 中国十七冶集团有限公司 A kind of the mid-side node connection structure and its method of prefabricated integral frame column beam
CN107313507A (en) * 2017-05-22 2017-11-03 广东省建筑工程集团有限公司 A kind of hollow column joint structure of assembly concrete framework and its construction method
CN111648468B (en) * 2020-06-04 2022-01-28 瀚阳国际工程咨询有限公司 Ultrahigh space utilization rate fabricated building system and efficient construction method thereof

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JPH01235743A (en) * 1988-03-16 1989-09-20 Fujita Corp Prestressed rpc construction work and pc column with prestressed beam
CN101672070A (en) * 2009-10-30 2010-03-17 中国京冶工程技术有限公司 Retard-bonded prestressed prefabricated integral frame joint system
CN101806148A (en) * 2010-03-29 2010-08-18 南京大地建设集团有限责任公司 Construction method for concrete beam with U-shaped steel bar connecting joints
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