CN108612189A - A kind of prefabricated U HPC shells local enhancement assembly concrete frame structure - Google Patents
A kind of prefabricated U HPC shells local enhancement assembly concrete frame structure Download PDFInfo
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- CN108612189A CN108612189A CN201810717984.3A CN201810717984A CN108612189A CN 108612189 A CN108612189 A CN 108612189A CN 201810717984 A CN201810717984 A CN 201810717984A CN 108612189 A CN108612189 A CN 108612189A
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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
- E04B1/19—Three-dimensional framework structures
- E04B1/1903—Connecting nodes specially adapted therefor
-
- 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
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
-
- 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
- E04B1/19—Three-dimensional framework structures
- E04B2001/1993—Details of framework supporting structure, e.g. posts or walls
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Reinforcement Elements For Buildings (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a kind of assembly concrete frame structures of prefabricated U HPC shell local enhancements, including suspension column annular prefabricated U HPC shells, precast concrete column, beam-ends U-shaped UHPC shells, precast concrete composite beam;Annular prefabricated U HPC shells are arranged at suspension column position in the precast concrete column;The suspension column annular prefabricated U HPC shells with stirrup and grout sleeve are prefabricated is integrated;The precast concrete composite beam beam-ends is by U-shaped prefabricated U HPC hull shapes at U-shaped keyway;The beam-ends U-shaped UHPC shells with stirrup is prefabricated is integrated, precast concrete composite beam lower part uses small dimension high tensile reinforcement;After composite beam is in place, beam upper longitudinal bar is bound, then cast in situs overlapping layer concrete forms overall structure.The prefabricated U HPC shells of superior performance are used at the maximum weighted of assembling frame component by the present invention, in conjunction with the advantage of the two, are reduced cost, are innovated assembly concrete frame structure form, promote assembling frame structural seismic performance.
Description
Technical field
The present invention relates to a kind of prefabricated U HPC shells local enhancement assembly concrete frame structures, belong to architectural engineering neck
Domain.
Background technology
Under new development situation, country actively pushes forward the transition and upgrade of construction industry, and assembled architecture is with its good warp
Ji, environmental and social benefits are grown rapidly.Precast Concrete Frame can greatly improve construction ability and build speed
Degree is most common, most widely used one of fabricated construction system.Currently, domestic main assembly concrete frame to be applied
There is precast beam bottom muscle to anchor into the structural systems such as formula, beam-ends keyway bridging type and node Integral prefabricated type, these systems are often deposited
The problems such as precision processing request is high, applicability is insufficient, construction is inconvenient or anti-seismic performance is not ideal enough, counteract significantly
The application advantage of assembly concrete frame.
With the progress of building material technology, ultra-high performance concrete(Ultra-High Performance
Concrete, abbreviation UHPC)Larger development is obtained, the superiority such as strong, high-ductility, high-impermeable and highly corrosion resistant with superelevation
Can, it is expected to become the basic material of next-generation infrastructure construction.However, due to using ultralow water-cement ratio and higher dosage
Cementitious material generally requires thermal curing to effectively reduce dry and creep and shrinkage, ensures the development of the strength of materials.And UHPC is glutinous
Property it is high, be not easy to pump, cast in situs operation is relatively fewer.Due to the high initial costs of UHPC, in building structure use compared with
It is few.
The technological core of assembly concrete frame structure is that beam column is connected with suspension column with key difficulties, connects design
Main target is all that fast simple installation is realized on the basis of mechanical property necessary to guarantee.But it leads at present to be applied
Assembly concrete frame structure beam column and suspension column connecting portion influence structure there is easy the problem of occurring to concentrate damage and failure
Performance is unfavorable for the popularization and application of assembly concrete frame.
Invention content
To solve the above problems, the present invention provides a kind of prefabricated U HPC shells local enhancement assembly concrete frame knots
Structure innovates assembly concrete frame structure form, prefabricated U HPC shells is used at the maximum weighted of assembling frame component, knot
The advantage of very-high performance material and prefabricating technique is closed, material property is played, reducing manufacturing cost influences, and improves convenience for construction.
It is insufficient to solve existing assembling frame structure adaptability, UHPC materials are difficult to the problem constructed, cost is excessively high.It is excellent in conjunction with the two
Gesture solves assembly concrete frame structure beam column of the present invention and suspension column connecting portion and occurs to concentrate damage and failure there is easy
The problem of.
In order to achieve the above objectives, technical scheme is as follows:
A kind of prefabricated U HPC shells local enhancement assembly concrete frame structure, it is characterised in that:It is combined including precast concrete
Column, precast concrete combination beam and cast-in-place concrete.
The precast concrete coupled column includes suspension column annular prefabricated U HPC shells and prefabricating common concrete column;The column
Foot annular prefabricated U HPC shells include rectangular shell, compound stirrup and grout sleeve.
The rectangular shell uses ultra-high performance concrete(UHPC)It is made, it is cyclic annular in direction, highly acquired through reasonable computation;
The annular limb part of the compound stirrup is embedded in advance in the rectangular shell;The grout sleeve is embedded in advance on the rectangular shell, and one
Half section part is embedded in the rectangular shell, enhances follow-up normal concrete in the cementitiousness of the rectangular shells of the UHPC.
The suspension column annular prefabricated U HPC shells are made of removable assembled template;The removable assembly type
Template includes removable exterior sheathing and inner template, and the removable exterior sheathing is made of four flat die plates, annularly;The inner template by
Four straight panels and four gussets form, and segmental arc are set in the straight panel, segmental arc is arranged in corner in the gusset, in the straight panel
It is made of two semicircles with setting stirrup hole, the stirrup hole at the gusset delivery position, is located at the straight panel and angle
On plate.The removable assembled template can effectively fix the position of the grout sleeve and the compound stirrup, and tear open
Dress is flexible, greatly reduces manufacture difficulty simultaneously, moreover it is possible to ensure the production quality of prefabricated component.
The prefabricating common concrete column includes longitudinal reinforcement, stirrup and normal concrete;The longitudinal reinforcement inserts in institute
It states in grout sleeve, the stirrup binding forms steel reinforcement cage on the longitudinal reinforcement;The normal concrete wraps up the steel
Muscle cage, and it is filled in the hollow space of the suspension column annular prefabricated U HPC shells, the suspension column annular of high intensity and high tenacity
Prefabricated U HPC shells effectively enhance the mechanical property of the stress maximum of suspension column section range, while constraining the common coagulation of suspension column
Soil improves the deformability of suspension column connection, slows down depression of bearing force, increases structure ductility.
The precast concrete combination beam includes beam-ends U-shaped prefabricated U HPC shells, prefabricating common concrete beam;The beam-ends U
Shape prefabricated U HPC shells are set to the end of the prefabricating common concrete beam, form U-shaped keyway.
The beam-ends U-shaped prefabricated U HPC shells include U-shaped shell and rectangle hoop;The U-shaped shell uses ultra-high performance concrete
(UHPC)It is made, is made of three faces;The major part of two long limbs of the rectangle hoop and a manomelia are embedded in the U-shaped in advance
In shell.
The prefabricating common concrete beam uses composite beam form, lower part longitudinal reinforcement high-strength using 600MPa grades of small dimension
Spend reinforcing bar;The lower part longitudinal reinforcement is stretched out out of described U-shaped keyway, and end is into a bent shape.The prefabricating common concrete beam
Upper surface overlaps cast-in-place concrete within the scope of floor height;The U-shaped prefabricated U HPC shells enhance beam-ends keyway area, effectively
Reduce conventional keyway bottom under course under cyclic loading because no stress indulges the concentration damage that rib tape is come.
The Prefabricated composite column is located at the Prefabricated composite column down through sleeve connection, the precast concrete combination beam
Both sides, the lower part longitudinal reinforcement stretch into joint cores, and the cast-in-place concrete is poured in joint cores and described prefabricated
Concrete combination beam top overlapping area forms general frame after maintenance hardening.
Preferably, the suspension column annular prefabricated U HPC shells are higher by grout sleeve a small distance, can be connected in suspension column high
It spends in range so that section rigidity and intensity is steps gradually changes avoids normal concrete local at changes of section position
It destroys and influences component performance.
Preferably, the prefabricated U-shaped UHPC shells length of beam-ends is slightly larger than keyway length, increase and prefabricating common concrete
Faying face, enhancing beam-ends improves anti-seismic performance in bearing capacity and deformability curved, under scissor state.
Preferably, a diameter of 12 ~ 16mm of the beam lower part small dimension high tensile reinforcement, diameter is determined through reasonable computation;It is small
There is the high tensile reinforcement of specification certain " flexibility " can be moved by manpower, effectively avoid the reinforcing bar collision problem at node.
A kind of making method of construction of prefabricated U HPC shells local enhancement assembly concrete frame structure, which is characterized in that
Include the following steps:
(1)Made annular UHPC shells of assembled template in factory, suspension column stirrup is from removable assembled template
Reserved stirrup hole passes through, prefabricated together with annular UHPC shells, grout sleeve, forms whole, column longitudinal reinforcement insertion grouting set
Cylinder, then banding steel cage, pour and conserve normal concrete, formation prefabricated post;
(2)The prefabricated U-shaped UHPC shells in factory, beam-ends stirrup and UHPC shells are prefabricated is integrated, beam lower part steel bar stress uses
Small dimension high tensile reinforcement, banding steel cage pour and conserve normal concrete, form precast beam;
(3)Prefabricated beam column is transported into in-site installation:After the vertical muscle of prefabricated post is in place in grout sleeve, high-strength grout is injected,
Prefabricated post is set to complete connection;After precast beam is in place, binding beam top regular tenacity indulges muscle, and the concrete of cast in situs overlapping layers arrives
Bean column node wet connection is completed in upper surface within the scope of floor height, is formed reliable whole.
The beneficial effects of the invention are as follows:
(1)The present invention is used for small precast UHPC shells to form local composite construction at the maximum weighted of assembling frame component,
In conjunction with the advantage of the two, innovate assembly concrete frame structure form, convenient for being prefabricated in the factory, improve join domain by
Smaller cost, promotion fabricated construction are promoted and construction industry transition and upgrade to greatest extent while power performance;
(2)Assembled template is used when prefabricated U HPC shells of the present invention make, it is ensured that the production quality of the prefabricated component, assembly type mould
Additional space is arranged in plate at grout sleeve and stirrup, effectively fixes its position, flexibly dismounts, greatly reduces the system of UHPC shells
Make difficulty of construction, improves efficiency;
(3)The present invention anchors into node area using 600MPa grades of small dimension high tensile reinforcements as beam bottom muscle, and the high strengthening tendons of small dimension can borrow
It is moved by manpower, effectively prevents the reinforcing bar collision in node area, improve the performance and convenience for construction of bonding pad;
(4)The present invention is realized in factory by prefabricating technique and is conserved to the high-temperature pressurizing of UHPC so that UHPC obtains preferable material
Property, while solving its stickiness height, it is not easy to pump, the big problem of difficulty of construction;The influence of manufacturing cost is minimized, UHPC is conducive to
The popularization and application of material.
Description of the drawings
Fig. 1 is the prefabricated annular UHPC shell schematic diagrames of suspension column of the present invention;
Fig. 2 is the removable assembled template schematic diagram of the present invention;
Fig. 3 is the dismantled and assembled inner template schematic diagram of the present invention;
Fig. 4 is the precast concrete column schematic diagram of the present invention;
Fig. 5 is the prefabricated U-shaped UHPC shells schematic diagram of beam-ends of the present invention;
Fig. 6 is the precast concrete beam schematic diagram of the present invention;
Fig. 7 is the overall structure and node assembly schematic diagram of the present invention.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings and detailed description.
As shown in Figure 1, first making the prefabricated annular UHPC shells of suspension column, toroidal shell is surrounded by four faces UHPC 1;Annular UHPC
Shell and grout sleeve 2 and suspension column compound stirrup 3 is prefabricated is integrated;It is a bit of that suspension column annular prefabricated U HPC shells are higher by grout sleeve 2
Distance can be connected in suspension column in altitude range so that section rigidity and intensity is steps gradually changes avoids normal concrete from existing
Local failure at changes of section position and influence component performance.
Suspension column annular prefabricated U HPC shells described in Fig. 1 are made of removable assembled template;Manufacturing process such as Fig. 2-3
Shown, the removable assembled template includes removable exterior sheathing 4 and inner template 5, and the removable exterior sheathing 4 is by four flat-dies
Board group is at annularly;The inner template 5 is made of four straight panels 22 and four gussets 21, and segmental arc 6 is set in the straight panel 22,
Segmental arc 6 is arranged in corner in the gusset 21, and stirrup hole 7, institute are arranged at 21 delivery position of the straight panel 22 and the gusset
It states stirrup hole 7 to be made of two semicircles, be located in the straight panel 22 and gusset 21.Grout sleeve 2 is placed on the arc
Section 6, the compound stirrup 3 is passed through from the stirrup hole 7;Then UHPC materials are poured into template, carry out high-temperature pressurizing maintenance,
It realizes annular UHPC shells and grout sleeve 2 and suspension column position stirrup 3 is prefabricated is integrated.
As shown in figure 4, normal concrete 8 and suspension column annular UHPC that precast concrete column by steel reinforcement cage, pours for the second time
Shell 9 forms;Longitudinal reinforcement 10 is first inserted into the grout sleeve 2 in suspension column UHPC shells by the making of prefabricated post, then binds stirrup
11, normal concrete 8 is then poured and conserved, prefabricated post is formed;The precast concrete column longitudinal reinforcement 10 is stretched out from capital,
Suspension column concrete section becomes smaller, and is matched with annular UHPC shells 9, forms local composite construction;The annular of high intensity and high tenacity is pre-
UHPC shells 9 processed effectively enhance the mechanical property of the stress maximum of suspension column section range, while constraining suspension column normal concrete,
The deformability for improving suspension column connection slows down depression of bearing force, increases structure ductility.
As shown in figure 5, beam-ends U-shaped UHPC shells are made of three faces UHPC 12, beam-ends keyway 13 is formed;U-shaped UHPC shells are long
Degree is acquired through reasonable computation;The beam-ends U-shaped UHPC shells with beam-ends stirrup 14 is prefabricated is integrated;Prefabricated U-shaped UHPC shells length is omited
More than 13 length of keyway, increase the faying face with prefabricating common concrete, enhancing beam-ends in bearing capacity curved, under scissor state and
Deformability improves anti-seismic performance.
As shown in fig. 6, precast concrete beam is composite beam, the normal concrete 15 and beam poured by steel reinforcement cage, for the second time
U-shaped UHPC shells 16 are held to form;The reinforcing bar of composite beam is the small dimension high tensile reinforcement 18 of stirrup 17 and beam lower part;Assembling reinforcement
Cage pours and conserves normal concrete, forms precast beam;Beam-ends concrete section becomes smaller to be matched with U-shaped keyway 13, at beam-ends
Form local composite construction;The precast concrete beam upper surface overlaps cast-in-place concrete within the scope of floor height;U-shaped is prefabricated
UHPC shells 16 enhance beam-ends keyway area, effectively reduce conventional keyway bottom under course under cyclic loading because no stress indulges rib tape
The concentration damage come.
18 a diameter of 12 ~ 16mm of beam lower part small dimension high tensile reinforcement, diameter is determined through reasonable computation;The high-strength steel of small dimension
There is muscle 18 certain " flexibility " can be moved by manpower, effectively avoid the reinforcing bar collision problem at node.
In conclusion a kind of prefabricated component production method of prefabricated U HPC shells local enhancement assembly concrete frame structure,
It carries out according to the following steps:(1)The prefabricated annular UHPC shells 9 in factory, suspension column position stirrup 2 and grout sleeve 3 and UHPC shells
Prefabricated to be integrated, column longitudinal reinforcement 10 is inserted into grout sleeve 2, then banding steel cage, pours and conserve normal concrete, is formed in advance
Column processed;(2)The prefabricated U-shaped UHPC shells 16 in factory, beam-ends stirrup and UHPC shells are prefabricated is integrated, beam lower part steel bar stress is adopted
With small dimension high tensile reinforcement 18, banding steel cage pours and conserves normal concrete, forms precast beam.
As shown in fig. 7, after the vertical muscle 10 of prefabricated post is in place in grout sleeve 2, high-strength grout is injected, prefabricated post is made to complete
Connection, Prefabricated superposed beam are lifted on prefabricated post both sides, and beam lower part small dimension high tensile reinforcement 18 stretches into joint cores, binds on beam
Portion commonly indulges muscle 19, then pours rear pouring concrete 20, and after hardening, lifting upper layer prefabricated post is seated on rear pouring concrete 20,
The vertical muscle 10 of lower layer's prefabricated post is inserted into the grout sleeve 2 of upper layer prefabricated post, then injects high-strength grout thereto, hardening with
Bean column node wet connection is completed afterwards, is formed reliable whole.
It should be pointed out that for those skilled in the art, without departing from the principle of the present invention,
Several improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.In the present embodiment not
The available prior art of specific each component part is realized.
Claims (6)
1. a kind of prefabricated U HPC shells local enhancement assembly concrete frame structure, it is characterised in that:Including concrete local soil type
Zygostyle, precast concrete combination beam and cast-in-place concrete;
The precast concrete coupled column includes suspension column annular prefabricated U HPC shells and prefabricating common concrete column;The suspension column ring
Shape prefabricated U HPC shells include rectangular shell, compound stirrup and grout sleeve;The rectangular shell is made of ultra-high performance concrete,
In direction ring-type;The annular limb part of the compound stirrup is embedded in advance in the rectangular shell;The grout sleeve is embedded in described in advance
On rectangular shell, half section is embedded in the rectangular shell;
The prefabricating common concrete column includes longitudinal reinforcement, stirrup and normal concrete;The longitudinal reinforcement inserts in the filling
It starches in sleeve, the stirrup binding forms steel reinforcement cage on the longitudinal reinforcement;The normal concrete wraps up the reinforcing bar
Cage, and it is filled in the hollow space of the suspension column annular prefabricated U HPC shells;
The precast concrete combination beam includes beam-ends U-shaped prefabricated U HPC shells, prefabricating common concrete beam;The beam-ends U-shaped is pre-
UHPC shells processed are set to the end of the prefabricating common concrete beam, form U-shaped keyway;
The beam-ends U-shaped prefabricated U HPC shells include U-shaped shell and rectangle hoop;The U-shaped shell is made of ultra-high performance concrete,
It is made of three faces;The major part of two long limbs of the rectangle hoop and a manomelia are embedded in advance in the U-shaped shell;
The prefabricating common concrete beam uses composite beam form, lower part longitudinal reinforcement to use small dimension 600MPa grade high-strength steel
Muscle;The lower part longitudinal reinforcement is stretched out out of described U-shaped keyway, and end is into a bent shape;
The precast concrete coupled column is connected down through grout sleeve, and the precast concrete combination beam is located at described prefabricated
Coupled column both sides, the lower part longitudinal reinforcement stretch into joint cores, and the cast-in-place concrete is poured in joint cores and institute
Precast concrete combination beam top overlapping area is stated, general frame is formed after maintenance hardening.
2. a kind of prefabricated U HPC shells local enhancement assembly concrete frame structure according to claim 1, feature exist
In:The production method of the suspension column annular prefabricated U HPC shells is:It is made of removable assembled template;It is described dismantled and assembled
Assembled template include removable exterior sheathing and inner template, the removable exterior sheathing is made of four flat die plates, annularly;It is described
Inner template is made of four straight panels and four gussets, and segmental arc is set in the straight panel, and segmental arc is arranged in corner in the gusset,
Stirrup hole is set at the straight panel and the gusset delivery position, and the stirrup hole is made of two semicircles, is located at described
In straight panel and gusset.
3. a kind of prefabricated U HPC shells local enhancement assembly concrete frame structure according to claim 1, feature exist
In:The suspension column annular prefabricated U HPC shells are higher by grout sleeve 3-10cm.
4. a kind of prefabricated U HPC shells local enhancement assembly concrete frame structure according to claim 1, feature exist
In:The beam-ends U-shaped prefabricated U HPC shell length is more than U-shaped keyway length.
5. a kind of prefabricated U HPC shells local enhancement assembly concrete frame structure according to claim 1, feature exist
In:The small dimension 600MPa grade high-strength bar diameters are 12,14 or 16mm, can be moved by manpower.
6. a kind of making method of construction of prefabricated U HPC shells local enhancement assembly concrete frame structure, which is characterized in that packet
Include following steps:
(1)Made annular UHPC shells of assembled template in factory, suspension column stirrup is from removable assembled template
Reserved stirrup hole passes through, prefabricated together with annular UHPC shells, grout sleeve, forms whole, column longitudinal reinforcement insertion grouting set
Cylinder, then banding steel cage, pour and conserve normal concrete, formation prefabricated post;
(2)The prefabricated U-shaped UHPC shells in factory, beam-ends stirrup and UHPC shells are prefabricated is integrated, beam lower part steel bar stress uses
Small dimension high tensile reinforcement, banding steel cage pour and conserve normal concrete, form precast beam;
(3)Prefabricated beam column is transported into in-site installation:After the vertical muscle of prefabricated post is in place in grout sleeve, high-strength grout is injected,
Prefabricated post is set to complete connection;After precast beam is in place, binding beam top regular tenacity indulges muscle, and the concrete of cast in situs overlapping layers arrives
Bean column node wet connection is completed in upper surface within the scope of floor height, is formed reliable whole.
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