CN108775083A - The assembly concrete frame structure and construction method connected outside precast beam plastic hinge region - Google Patents
The assembly concrete frame structure and construction method connected outside precast beam plastic hinge region Download PDFInfo
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- CN108775083A CN108775083A CN201810742473.7A CN201810742473A CN108775083A CN 108775083 A CN108775083 A CN 108775083A CN 201810742473 A CN201810742473 A CN 201810742473A CN 108775083 A CN108775083 A CN 108775083A
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- concrete
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- 239000004567 concrete Substances 0.000 title claims abstract description 71
- 238000010276 construction Methods 0.000 title claims abstract description 56
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 48
- 210000003205 muscle Anatomy 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 6
- 230000006378 damage Effects 0.000 claims description 6
- 239000011178 precast concrete Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 238000011065 in-situ storage Methods 0.000 claims description 5
- 239000011440 grout Substances 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 238000009415 formwork Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 abstract description 5
- 244000046052 Phaseolus vulgaris Species 0.000 abstract description 5
- 230000007812 deficiency Effects 0.000 abstract description 5
- 230000002787 reinforcement Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 208000001491 myopia Diseases 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- 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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
- E04B1/5831—Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially rectangular form
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/32—Columns; Pillars; Struts of metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The assembly concrete frame structure connected outside a kind of precast beam plastic hinge region of the present invention, including prefabricated post and precast beam, prefabricated post are multilayer prefabricated post, and the joint core region of prefabricated post is provided with cantilever beam；The U-shaped reinforcing bar close ring that prefabricated post upper cantilever beam end is stretched out, prefabricated beam end has corresponding U-shaped reinforcing bar close ring, the U-shaped reinforcing bar close ring of prefabricated post upper cantilever beam end and the U-shaped reinforcing bar close ring of prefabricated beam end intersect, the two is that overlap joint or interval are evenly arranged, arrangement encryption stirrup at this, and poured concrete.Connecting portion of the present invention avoids beam-ends areas of plasticity hinge and bean column node position, the stress smaller part in beam is arranged in join domain, influence when can reduce prefabricated concrete structure interior joint connecting portion performance deficiency to integrality performance of the structure, increase the safety coefficient of prefabricated concrete structure, this kind of prefabricated concrete structure design and node connecting portion construction method are simple and effective, and construction quality is easy to get guarantee.
Description
Technical field
The present invention relates to brick or concrete duct field, the assembly concrete frame of connection outside specifically a kind of precast beam plastic hinge region
Frame structure and construction method.
Background technology
Commonly the method for designing and constructing is beam column component to assembly concrete frame structure is respectively prefabricated unit, is then led to
The connection that pouring concrete or other measures after the bar splicing in bean column node region carry out prefabricated unit is crossed, using this type
The structure of connection type is commonly referred to as assembled integral concrete frame structure, and assembled integral bean column node performance is to reach
Etc. it is cast-in-place be target, therefore, the cast-in-place bean column node such as also known as.But in practical applications, this kind of connection type there is also
Many deficiencies：Beam column node core area domain longitudinal reinforcement beam-column and stirrup are complicated, the connection of reinforcing bar and overlap joint difficulty is larger and quality is difficult
To ensure；It vibrates when pouring concrete behind construction site difficulty；Pouring concrete and precast concrete interface performance deficiency etc. afterwards, it is prefabricated
The component quality better performances concrete quality that still construction site pours is poor, therefore, Practical Project interior joint connecting portion
It is extremely difficult to the cast-in-place performance such as required.Meanwhile under normal use and geological process, beam-ends and beam column node core area domain need
Larger moment of flexure and shearing are undertaken, and pouring concrete region will appear plastic hinge, therefore, this kind under geological process after beam-ends
If the connection type connecting node performance of type such as is not achieved at the cast-in-place performance, it is easy to go out under normal use and geological process
Existing serious damage and destruction, and damage easily primarily occur ins the key position in beam column node core area domain.
Invention content
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention is provided outside a kind of precast beam plastic hinge region
The assembly concrete frame structure and construction method of connection.
Technical solution：In order to solve the above technical problems, the assembled connected outside a kind of precast beam plastic hinge region of the present invention
Concrete frame structure, including prefabricated post and precast beam, prefabricated post are multilayer prefabricated post, are set in the joint core region of prefabricated post
It is equipped with cantilever beam；The U-shaped reinforcing bar close ring that prefabricated post upper cantilever beam end is stretched out, prefabricated beam end have corresponding U-shaped reinforcing bar to close
Cyclization, the U-shaped reinforcing bar close ring of prefabricated post upper cantilever beam end intersect with the U-shaped reinforcing bar close ring of prefabricated beam end, and two
Person is that overlap joint or interval are evenly arranged, arrangement encryption stirrup at this, and has poured concrete.
Wherein, the cantilever beam length of prefabricated post is not less than the length of beam-ends plastic hinge.
Wherein, the reinforcing bar length of each U-shaped steel muscle close ring bending is not less than max (200,0.5h0,10d).
Wherein, 1 uniform intervals of U-shaped steel muscle close ring of the U-shaped steel muscle close ring of cantilever beam and precast beam are arranged or interlock
Bar splicing is arranged.
Wherein, the U-shaped reinforcing bar close ring of prefabricated beam-ends stretching is exposed or is wrapped in the keyway for being set to prefabricated beam-ends,
The length that the length of keyway pours node region with after is consistent, and the thickness of keyway is not less than 50mm, and the concrete surface inside keyway is
Rough surface is not less than 6mm when the roughness of rough surface is measured using heap micromicrofarad.
Wherein, the end of cantilever beam is all encrypted by stirrup, and the stirrup encryption length of prefabricated beam-ends is not less than one times
Higher value in prefabricated deck-molding and 500mm the two, the U-shaped reinforcing bar close ring that region is poured after connecting portion make stirrup encryption, three
The sum of the length in hoop reinforcement domain is no less than 1/3 prefabricated beam length.When precast beam top connects cast-in-situ floor or prefabricated
When superimposed sheet, precast beam is composite beam form, and the stirrup of precast beam uses the form of U-stirrups.
The present invention also provides a kind of assembly concrete frame construction methods connected outside precast beam plastic hinge region, including with
Lower step：
Step 1：The lifting construction of multilayer prefabricated post is carried out first, and the multilayer prefabricated post number of plies is layer 2-3, the connection of prefabricated post
It is connected using column bottom grout sleeve, except the connecting portion of the multilayer prefabricated post of bottom column is arranged at the inflection point of column, to reduce
The stress of prefabricated post connecting portion reduces the risk of the damage failure of weak part in structure, is set after the completion of prefabricated post construction
Set temporary support；
Step 2：After waiting for prefabricated post installation, start the lifting of precast beam, precast beam is to lift from top to bottom, in advance
After beam processed lifting is in place, check whether the positioning in tri- directions precast beam XYZ is accurate, including prefabricated soffit, side and pre-
Whether the position of beam end processed is accurate, meanwhile, check the U-shaped reinforcing bar close ring and prefabricated beam-ends for ensuring that prefabricated post cantilever beam stretches out
Portion's U-shaped reinforcing bar close ring crossover location is accurate, and the lap of splice meets the requirement of regulation and bearing capacity, while the two reinforcing bar phase interconnection
It connects, after precast beam lifting is in place, the distance of cantilever beam keyway and precast beam end cross-sectional is not more than 30mm；
Step 3：After the completion of waiting for precast beam lifting construction, stirrup is arranged at the overlap joint U-shaped reinforcing bar close ring of connecting portion,
Stirrup encryption is carried out, if U-stirrups, should be arranged in prefabricated cantilever beam-ends by the end band keyway of the cantilever beam of prefabricated post
In the keyway side wall in portion；
Step 4：After the completion of the stirrup construction of construction site, if prefabricated post cantilever beam beam-ends is needed without keyway in interconnecting piece
Position carries out formwork casting concrete, if prefabricated post cantilever beam end can be poured directly abutment joint when carrying keyway after being handled
Concrete is built, the concrete poured uses the pea gravel concreten of a grade grade higher than precast concrete intensity, and pours mixed
Solidifying soil uses ungauged regions or the concrete of microdilatancy, ensures not disturb reinforcing bar when casting concrete vibrates, casting concrete vibrates
Closely knit, the Concrete Filled of seam areas is closely knit；When precast beam is designed as composite beam, rear pouring concrete height and concrete
Native deck-molding is consistent；
Step 5：After the completion of waiting for precast beam construction, floor slab construction is carried out, floor uses prefabricated superimposed sheet or cast-in-situ floor, complete
At the construction of assembly concrete frame.
Advantageous effect：The assembly concrete frame structure connected outside a kind of precast beam plastic hinge region of the present invention and construction
Method has the advantages that：
The connecting portion of the present invention avoids beam-ends areas of plasticity hinge and bean column node position, and join domain is arranged in beam
Stress smaller part, to the shadow of integrality performance of the structure when can reduce prefabricated concrete structure interior joint connecting portion performance deficiency
It rings, increases the safety coefficient of prefabricated concrete structure, meanwhile, this kind of prefabricated concrete structure design and node connecting portion
Construction method is simple and effective, and construction quality is easy to get guarantee.
Description of the drawings
Fig. 1 is precast beam of the present invention and prefabricated post connecting portion structural map；
Fig. 2 is the outer connecting portion structural map of plastic hinge of the present invention；
Fig. 3 is precast beam lifting construction plan view；
Fig. 4 is that precast beam connects plan view with prefabricated post；
Fig. 5 is precast beam lifting construction three-dimensional schematic elevation view；
Fig. 6 is precast beam lifting construction three-dimensional schematic side view；
Fig. 7 is that precast beam connects three-dimensional schematic elevation view with prefabricated post；
Fig. 8 is that precast beam connects three-dimensional schematic side view with prefabricated post；
The precast column unit schematic three dimensional views of the keyed slot of Fig. 9 cantilever beam ends.
Wherein：1- prefabricated posts, 2- precast beams, 3- cantilever beams, 4- shear keies, 5- shear keies, 6- prefabricated components join domains,
7-U shape reinforcing bar close rings, 8-U shape reinforcing bar close rings, 9- keyways, 10- precast beam overlapping layers, 11- connecting portion stirrups, 12- are pre-
Beam lifting construction processed direction.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figs 1-4, the assembly concrete frame structure connected outside a kind of precast beam plastic hinge region of the invention, packet
Prefabricated post 1 and precast beam 2 are included, prefabricated post 1 is multilayer prefabricated post 1, and the joint core region of prefabricated post 1 is provided with cantilever beam 3；
There are corresponding U-shaped reinforcing bar close ring 7 in the U-shaped reinforcing bar close ring 8 that 1 upper cantilever beam of prefabricated post, 3 end is stretched out, 2 end of precast beam, in advance
Component join domain 6 processed is by the way of wet connection.The U-shaped reinforcing bar close ring 8 of 1 upper cantilever beam of prefabricated post, 3 end and precast beam 2
The U-shaped reinforcing bar close ring 7 of end intersects, and the two is that overlap joint or interval are evenly arranged, arrangement encryption stirrup at this, and is poured
There are concrete, 3 length of cantilever beam of prefabricated post 1 to be not less than the length of beam-ends plastic hinge.The connecting portion of each prefabricated components is located at
The stress smaller part of cantilever beam and precast beam, only under the effect of gravity, beam moment of flexure herein is zero, meanwhile, avoid beam-ends modeling
Property hinge position.By the precast assembly technical method of this kind of mode, assembled integral concrete frame can be effectively improved
The overall performance of structure such as reaches at the cast-in-place purpose of design.Further, 3 length of cantilever beam of stretching is no less than beam-ends modeling
Property hinge length can be according to different engineerings since Plastic hinge length is influenced by factors such as beam cross-section sizes and shear span ratio
Actual conditions value also can do near-sighted value according to for max (h0,500mm), should be analyzed according to calculating when beam is deep beam structure
Determine the length that 1 component upper cantilever beam 3 of prefabricated post stretches out.U-shaped steel muscle close ring can be closed with whole reinforcing bar bending, or outstanding
Binding or welded closed after the vertical muscle bending in the top and the bottom of arm beam and precast beam, it is desirable that curved when using binding closure or welded closed
The reinforcing bar length of folding is not less than max (200,0.5h0,10d), while the bending overlap joint of reinforcing bar should meet present GB 50010-2010
Etc. technical specifications requirement, the U-shaped steel muscle close ring 8 of cantilever beam 3 and 7 uniform intervals of U-shaped steel muscle close ring of precast beam 2 are arranged
Or staggeredly bar splicing is arranged.
As shown in figure 9, the U-shaped reinforcing bar close ring that 2 end of precast beam is stretched out is exposed or is wrapped in and is set to 2 end of precast beam
In keyway 9, the length of keyway 9 pours that the length of node region is consistent with after, avoids the coagulation for pouring node region at the construction field (site)
Soil needs template construction, greatly improves speed of application and construction quality.The thickness of keyway 9 is not less than 50mm, mixed inside keyway 9
Solidifying soil face is rough surface, and 6mm is not less than when the roughness of rough surface is measured using heap micromicrofarad.
The end of cantilever beam 3 is all encrypted by stirrup, and the stirrup encryption length at 2 end of precast beam is prefabricated not less than one times
The height of beam 2 and the higher value in 500mm the two, the U-shaped reinforcing bar close ring that region is poured after connecting portion are encrypted by stirrup 11, and three
The precast beam 2 that the sum of the length in a hoop reinforcement domain is no less than 1/3 is grown.When 2 top of precast beam connect cast-in-situ floor or
When prefabricated superimposed sheet, precast beam 2 is composite beam form, and the stirrup of precast beam 2 uses the form of U-stirrups.
When according to actual design requirement, 2 top and the bottom of precast beam need to configure more beam when indulging muscle, i.e. about 2 precast beam
When portion's reinforcing bar is the double-deck arrangement of reinforcement, the vertical muscle of beam closure that the cantilever beam 3 of 1 beam column nucleus of 2 end of precast beam and prefabricated post stretches out can
Using rebuilding, still, the length that U-shaped reinforcing bar close ring is stretched out presses inner ring, that is, smaller U-shaped is closed and indulges muscle length gauge
It calculates.
The rear pouring concrete of the join domain of prefabricated components preferably uses pea gravel concreten, and the strength grade of concrete should compare
The strength grade of concrete of prefabricated components is high, answers vibration compacting in the construction process.3 beam-ends of the cantilever beam setting of prefabricated post 1 is anti-
Cut key 4,2 end set anti-shear concrete key 5 of precast beam, the setting of shear key should meet the current arts such as JGJ-2014 specification and
The requirement of regulation.It is preferably preferential when needing to configure more beam top and the bottom and indulging muscle when 2 section of precast beam is larger or span is larger
The forms such as boundling arrangement of reinforcement are considered as, preferably use high tensile reinforcement, and beam top and bottom arrangement of reinforcement should suitably adjust steel bar arrangement position, with
Ensure between prefabricated components bar connecting (overlap joint) is easy for construction and reliable in quality.
As shown in figures 5-9, the prefabricated components of above-mentioned assembly concrete frame structure are after prefabricated components complete, fortune
It is defeated to construction site carry out lifting and assembling construction, concrete construction method be：
Step 1：The lifting construction of multilayer prefabricated post 1 is carried out first, and 1 number of plies of multilayer prefabricated post is advisable with layer 2-3, prefabricated post
The grout sleeve connection of column bottom can be used in 1 connection, except the connecting portion of the multilayer prefabricated post 1 of bottom column may be provided at the recurvation of column
At point, to reduce the stress of 1 connecting portion of prefabricated post, reduce the risk of the damage failure of weak part in structure, when prefabricated post 1
Reliable temporary support should be set after the completion of construction, can by prefabricated post 1 embedded fixing component use type steel support, meet
The requirement of construction loads when hoisting prefabricated beam 2 and floor slab construction ensures that prefabricated post 1 is not damaged when construction；
Step 2：After waiting for 1 installation of prefabricated post, check whether the construction quality of prefabricated post 1 and positioning are accurate, wait for
Prefabricated post 1 connects the lifting that grouting material intensity in grout sleeve reaches beginning precast beam 2 after requirement, the lifting construction of precast beam 2
Direction 12 is top-down lifting mode as shown in Fig. 3, Fig. 5, Fig. 6, should be conscientious when lifting in place when precast beam 2 lifts
2 end of U-shaped reinforcing bar close ring 8 and precast beam that whether positioning is accurate, and the cantilever beam 3 of prefabricated post 1 stretches out in hoisting process checked
U-shaped reinforcing bar close ring 7 should avoid collision, if there is collision when answer advance correction or by mechanical measure adjustment stretch out it is prefabricated
The reinforcement location of component should check whether positioning of the precast beam 2 in tri- directions XYZ be accurate after precast beam 2 lifts in place, wrap
Whether the position for including 2 end of 2 bottom surface of precast beam, side and precast beam is accurate, meanwhile, should especially go through ensures prefabricated post
The U-shaped steel muscle close ring and 2 end U-shaped reinforcing bar close ring crossover location of precast beam that 1 cantilever beam 3 stretches out are accurate, the lap of splice
Meet the requirement of regulation and bearing capacity, while 1 cantilever beam 3 of the two prefabricated post should be overlapped mutually, if due to design and construction etc. because
When element was occurred without the case where overlap joint, it is uniform that the two prefabricated post 1 cantilever beam, 3 spacing distances should be protected；If the cantilever beam of 1 band of prefabricated post
The 3 prefabricated keyways of end band, without breakage when should ensure that keyway in lifting construction in construction, after precast beam 2 lifts in place, cantilever beam
The distance of 2 end cross-sectional of 3 keyways and precast beam is not more than 30mm；
Step 3：After the completion of waiting for 2 lifting construction of precast beam, hoop is arranged at the overlap joint U-shaped reinforcing bar close ring of connecting portion
Muscle should carry out stirrup encryption herein, if stirrup encryption is not required here according to current art regulatory requirements, it is still necessary to
Stirrup encryption is being done according to design requirement, is considering that site operation is convenient, U-stirrups, U-stirrups shape and ruler should be used
The very little requirement that should meet current specifications；If U-stirrups, should be arranged in pre- by the end band keyway of the cantilever beam 3 of prefabricated post 1
In 9 side wall of keyway of 3 end of cantilever beam processed；
Step 4：After the completion of the stirrup construction of construction site, if 3 beam-ends of cantilever beam of prefabricated post 1 without keyway, is needed even
Socket part position carries out formwork casting concrete, if 3 end of cantilever beam of prefabricated post 1 can directly abutment joint carry out when carrying keyway
After-pouring concrete is handled, the coagulation local product poured uses the pea gravel concreten of a grade grade higher than precast concrete intensity,
And the concrete poured should use ungauged regions or the concrete of microdilatancy, should ensure that when casting concrete vibrates and do not disturb reinforcing bar,
Casting concrete vibration compacting, the Concrete Filled for paying special attention to seam areas are closely knit.When precast beam 2 is designed as composite beam,
Pouring concrete height is consistent with precast concrete deck-molding afterwards；
Step 5：After the completion of waiting for that precast beam 2 is constructed, floor slab construction can be carried out, prefabricated superimposed sheet or cast-in-place building can be used in floor
Plate completes the construction of assembly concrete frame.
The above is only a preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. the assembly concrete frame structure connected outside a kind of precast beam plastic hinge region, it is characterised in that：Including prefabricated post and
Precast beam, prefabricated post are multilayer prefabricated post, and the joint core region of prefabricated post is provided with cantilever beam；Prefabricated post upper cantilever beam-ends
The U-shaped reinforcing bar close ring that portion is stretched out, prefabricated beam end have corresponding U-shaped reinforcing bar close ring, the U-shaped of prefabricated post upper cantilever beam end
Reinforcing bar close ring and the U-shaped reinforcing bar close ring of prefabricated beam end intersect, and the two is that overlap joint or interval are evenly arranged, cloth at this
Encryption stirrup is set, and has poured concrete.
2. the assembly concrete frame structure connected outside precast beam plastic hinge region according to claim 1, feature exist
In：Wherein, the cantilever beam length of prefabricated post is not less than the length of beam-ends plastic hinge.
3. the assembly concrete frame structure connected outside precast beam plastic hinge region according to claim 1, feature exist
In：Wherein, the reinforcing bar length of each U-shaped steel muscle close ring bending is not less than max (200,0.5h0,10d).
4. the assembly concrete frame structure connected outside precast beam plastic hinge region according to claim 1, feature exist
In：Wherein, 1 uniform intervals of U-shaped steel muscle close ring of the U-shaped steel muscle close ring of cantilever beam and precast beam are arranged or staggeredly reinforcing bar is taken
Connect arrangement.
5. the assembly concrete frame structure connected outside precast beam plastic hinge region according to claim 1, feature exist
In：Wherein, the U-shaped reinforcing bar close ring that prefabricated beam-ends stretches out is exposed or is wrapped in the keyway for being set to prefabricated beam-ends, keyway
Length pour that the length of node region is consistent with after, the thickness of keyway is not less than 50mm, and the concrete surface inside keyway is coarse
Face is not less than 6mm when the roughness of rough surface is measured using heap micromicrofarad.
6. the assembly concrete frame structure connected outside precast beam plastic hinge region according to claim 1, feature exist
In：Wherein, the end of cantilever beam is all encrypted by stirrup, and the stirrup encryption length of prefabricated beam-ends is not less than one times of precast beam
The high higher value with 500mm the two, the U-shaped reinforcing bar close ring that region is poured after connecting portion make stirrup encryption, and three stirrups add
The sum of the length in close region is no less than 1/3 prefabricated beam length.When precast beam top connects cast-in-situ floor or prefabricated superimposed sheet
When, precast beam is composite beam form, and the stirrup of precast beam uses the form of U-stirrups.
7. a kind of assembly concrete frame construction method connected outside precast beam plastic hinge region, which is characterized in that including following
Step：
Step 1：The lifting construction of multilayer prefabricated post is carried out first, and the multilayer prefabricated post number of plies is layer 2-3, and the connection of prefabricated post uses
The grout sleeve connection of column bottom, it is prefabricated to reduce except the connecting portion of the multilayer prefabricated post of bottom column is arranged at the inflection point of column
The stress of column connecting portion reduces the risk of the damage failure of weak part in structure, when setting is faced after the completion for prefabricated post construction
When support；
Step 2：After waiting for prefabricated post installation, start the lifting of precast beam, precast beam is to lift from top to bottom, precast beam
After lifting is in place, check whether the positioning in tri- directions precast beam XYZ is accurate, including prefabricated soffit, side and precast beam
Whether the position of end is accurate, meanwhile, check the U-shaped reinforcing bar close ring and prefabricated beam end U for ensuring that prefabricated post cantilever beam stretches out
Shape reinforcing bar close ring crossover location is accurate, and the lap of splice meets the requirement of regulation and bearing capacity, while the two reinforcing bar mutually overlaps,
After precast beam lifting is in place, the distance of cantilever beam keyway and precast beam end cross-sectional is not more than 30mm；
Step 3：After the completion of waiting for precast beam lifting construction, stirrup is arranged at the overlap joint U-shaped reinforcing bar close ring of connecting portion, is carried out
Stirrup encryption, if U-stirrups, should be arranged in prefabricated cantilever beam end by the end band keyway of the cantilever beam of prefabricated post
In keyway side wall；
Step 4：After the completion of the construction of construction site stirrup, if prefabricated post cantilever beam beam-ends without keyway, need connecting portion into
Row formwork casting concrete, if prefabricated post cantilever beam end can directly to carry out processing after-pouring mixed for abutment joint when carrying keyway
Solidifying soil, the concrete poured use the pea gravel concreten of a grade grade higher than precast concrete intensity, and the concrete poured
Ensure not disturb reinforcing bar using ungauged regions or the concrete of microdilatancy, when casting concrete vibrates, casting concrete vibration compacting,
The Concrete Filled of seam areas is closely knit；When precast beam is designed as composite beam, rear pouring concrete height and precast concrete beam
It is high consistent；
Step 5：After the completion of waiting for precast beam construction, floor slab construction is carried out, floor uses prefabricated superimposed sheet or cast-in-situ floor, completes dress
Construction with formula concrete frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810742473.7A CN108775083A (en) | 2018-07-09 | 2018-07-09 | The assembly concrete frame structure and construction method connected outside precast beam plastic hinge region |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810742473.7A CN108775083A (en) | 2018-07-09 | 2018-07-09 | The assembly concrete frame structure and construction method connected outside precast beam plastic hinge region |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518802A (en) * | 2018-12-03 | 2019-03-26 | 上海建工二建集团有限公司 | Assembled beam-column structure and construction method thereof |
| CN111335458A (en) * | 2018-12-18 | 2020-06-26 | 南京百西思建筑科技有限公司 | Prefabricated assembly double-hinged frame system |
| CN112411608A (en) * | 2020-10-29 | 2021-02-26 | 上海宝冶冶金工程有限公司 | Construction method of assembled blast furnace |
| CN113136946A (en) * | 2021-03-30 | 2021-07-20 | 东南大学 | Self-supporting assembly type seawater sea sand concrete frame structure and construction method |
| CN113882590A (en) * | 2021-09-27 | 2022-01-04 | 深圳市市政工程总公司 | Prefabricated post and prefabricated beam full-assembly type rigid connection structure |
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| CN114809086A (en) * | 2022-06-08 | 2022-07-29 | 青岛中科坤泰装配建筑科技有限公司 | Integral subway station structure of assembly of annular reinforcing bar overlap joint |
| CN114855876A (en) * | 2022-06-08 | 2022-08-05 | 青岛中科坤泰装配建筑科技有限公司 | Prefabricated double-layer integrated column for underground structure and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518802A (en) * | 2018-12-03 | 2019-03-26 | 上海建工二建集团有限公司 | Assembled beam-column structure and construction method thereof |
| CN111335458A (en) * | 2018-12-18 | 2020-06-26 | 南京百西思建筑科技有限公司 | Prefabricated assembly double-hinged frame system |
| CN112411608A (en) * | 2020-10-29 | 2021-02-26 | 上海宝冶冶金工程有限公司 | Construction method of assembled blast furnace |
| CN114457957A (en) * | 2020-11-10 | 2022-05-10 | 内蒙古中朵远大建筑工业有限公司 | Prefabricated frame post and prefabricated building |
| CN113136946A (en) * | 2021-03-30 | 2021-07-20 | 东南大学 | Self-supporting assembly type seawater sea sand concrete frame structure and construction method |
| CN113882590A (en) * | 2021-09-27 | 2022-01-04 | 深圳市市政工程总公司 | Prefabricated post and prefabricated beam full-assembly type rigid connection structure |
| CN114809086A (en) * | 2022-06-08 | 2022-07-29 | 青岛中科坤泰装配建筑科技有限公司 | Integral subway station structure of assembly of annular reinforcing bar overlap joint |
| CN114855876A (en) * | 2022-06-08 | 2022-08-05 | 青岛中科坤泰装配建筑科技有限公司 | Prefabricated double-layer integrated column for underground structure and construction method thereof |
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