CN106917470A - The steel tube confinement concrete-filled rectangular steel tube component and its processing method of a kind of sandwich - Google Patents
The steel tube confinement concrete-filled rectangular steel tube component and its processing method of a kind of sandwich Download PDFInfo
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- CN106917470A CN106917470A CN201710141592.2A CN201710141592A CN106917470A CN 106917470 A CN106917470 A CN 106917470A CN 201710141592 A CN201710141592 A CN 201710141592A CN 106917470 A CN106917470 A CN 106917470A
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- 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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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Abstract
The invention discloses the steel tube confinement concrete-filled rectangular steel tube component and its processing method of a kind of sandwich, the concrete filled steel tube new type of component of the steel tube confinement of wherein described sandwich is made up of outer layer pipe, sandwich material and core concrete filled steel tubular member, and the outer layer pipe and sandwich material only provide core concrete filled steel tube sidewise restraint effect；The outer layer pipe is circle, and the core concrete filled steel tubular member is rectangle；Wherein outer layer pipe is attached along the elongated arrangement in core concrete filled steel tubular member surface and not with the end of core component and bean column node, the present invention can strengthen the cooperation performance between core component steel pipe and core concrete, improve the bearing capacity and ductility of component, improve the failure mode of component, strengthen antidetonation, the corrosion-resistant and fire resistance of component；The principle of the invention is clear, excellent in mechanical performance, engineering cost are relatively low.
Description
Technical field
The invention belongs to building structural element field, more particularly to a kind of sandwich steel tube confinement concrete-filled rectangular steel tube
Component and its processing method.
Background technology
Concrete filled steel tube refers to the fill concrete in steel pipe and the combined member that is formed.Concrete filled steel tubular member is in stress mistake
Cheng Zhong, steel pipe makes concrete be in the stress state of three dimension stress to the effect of contraction of concrete, so that core is mixed in steel pipe
The intensity for coagulating soil is improved, and ductility significantly improves；Meanwhile, the presence of core concrete can be avoided or delay steel pipe to occur
Local buckling, so as to ensure that its material property is not fully exerted.Compared with reinforced concrete structure, in concrete-filled steel tube construction
During, steel pipe can save formwork cost, accelerating construction progress as the template for pouring its core concrete；With steel knot
Structure is compared, and the presence of core concrete makes the fire resistance of component more preferable, saves fireproof coating, reduces construction costs.By steel pipe
Concrete filled steel tube is combined into coagulation local soil type, by the interaction of steel pipe and core concrete, two kinds of materials can be not only made up
Respective shortcoming, and the advantage of the two can be given full play to, make concrete filled steel tube that there are a series of superior mechanical properties.
In recent years, concrete filled steel tube is favored because of its superior mechanical property by engineering circles, in skyscraper and long-span bridge
Obtain increasingly being widely applied in beam.
But concrete filled steel tube there is also weak point in being applied in Practical Project, specifically include：
（1）Under xial feed effect, steel pipe undertakes longitudinal load, therefore steel pipe to steel core concrete column simultaneously with core concrete
Binding effect to core concrete fails to be not fully exerted, and especially for steel pipe high strength concrete column reinforcing, steel pipe is to core
The binding effect of concrete is not notable, and core high-strength concrete is also easy to produce shearing conquassation destruction in loading process；For side
（Square）Shape concrete filled steel tubular member, steel pipe is uneven in concrete section to the effect of contraction of core concrete, steel pipe corner
It is confined concrete with section middle part concrete, and steel plate rigidity of middle is weaker, it is even de- with inner concrete after steel pipe flexing
From, near middle concrete is unconfinement concrete, compared with circular steel tube concrete, side（Square）The steel pipe of shape concrete filled steel tube
Improvement to core concrete mechanical property is weaker；
（2）Under xial feed effect, steel pipe is typically in the stress state of the horizontal tension of longitudinal direction compression to concrete filled steel tubular member,
This makes longitudinal yield strength of steel pipe be less than the unidirectional tensile yield strength of steel pipe；With the increase of deformation, steel pipe is to core coagulation
The lateral confinement effect of soil gradually strengthens, particularly after steel pipe is surrendered, the longitudinal stress of steel pipe with its lateral stress increase
And gradually reduce, i.e. contribution of the steel pipe to component longitudinal load-bearing power also weakens therewith；
（3）Concrete filled steel tubular member meet with equivalent to this area seismic fortification intensity set up defences earthquake effect when, component may
It is damaged, its steel pipe is likely to be breached surrender or produces flexing, and component need to carry out repairing and reinforcement can be just continuing with；
（4）Under xial feed effect, at the loading initial stage, steel pipe is in elastic rank to concrete filled steel tubular member with core concrete
Section, because the Poisson's ratio of steel pipe is more than core concrete, the transversely deforming of steel pipe is bigger than the transversely deforming of core concrete, and this leads
Cause to be produced between steel pipe and core concrete and disengage phenomenon, especially for thin-wall steel tube high-strength concrete component, high-strength core is mixed
Solidifying soil is small in loading initial stage transversely deforming, and it is more notable that thin-wall steel tube disengages phenomenon with core concrete；Additionally, in Practical Project
Because the pouring of core concrete, maintenance method are improper or core concrete produces and shrinks, to creep and can cause steel with temperature deformation
Phenomenon of coming to nothing, above phenomenon are produced between pipe and core concrete can be influenceed the interaction of steel pipe and core concrete, make
Steel pipe can produce larger initial stress at the loading initial stage, so as to influence the mechanical property of component；
（5）In actual concrete filled steel tubular member, steel pipe need to periodically carry out strict preservative treatment because of its poor corrosion resistance, otherwise
Corrosion is susceptible to, the durability and mechanical property of component is influenceed, use of such component in some particular surroundings is limited,
Such as Ultra-Long Spans CFST Arch Bridge causes its development in coastal area to be received with application because of the rotproofness difference of outer layer pipe
To limitation；
（6）The steel pipe of concrete filled steel tubular member is in outermost layer, and steel pipe need to undertake longitudinal load, under fire effect, steel pipe
Intensity and elastic modelling quantity strongly reduce, be to improve so as to reduce the bearing capacity of concrete filled steel tubular member, therefore in Practical Project
The fire resistance of concrete filled steel tubular member, still needs in outer surface of steel tube sprayed fire proofing protective layer, so as to increase construction costs.
For this reason, it is necessary to design a kind of new concrete filled steel tube component, component steel pipe can be strengthened mixed to core
The effect of contraction of soil is coagulated, the bearing capacity and ductility of component is improved, improves the failure mode of component, strengthen the corrosion-resistant and resistance to of component
Fiery performance.
The content of the invention
It is an object of the invention to provide a kind of steel tube confinement concrete-filled rectangular steel tube component of sandwich, it is intended to solve existing
There is the deficiency of concrete filled steel tubular member technology, be used to strengthen the cooperation between core component steel pipe and core concrete
Can, the bearing capacity and ductility of component are improved, improve the failure mode of component, strengthen antidetonation, the corrosion-resistant and fire resistance of component.
The present invention is achieved in that a kind of steel tube confinement concrete-filled rectangular steel tube component of sandwich, by hollow cylinder
The outer layer assembly nested groups of the core component of structure and hollow cylinder structure are between the outer layer assembly and the core component
Filled with sandwich material；The core component inside is filled with the horizontal stroke of inner layer material, the core component and the outer layer assembly
Sectional view is centrosymmetric image；The symmetrical centre of the cross section of the core component and the outer layer assembly overlaps；Institute
State the inwall width of outer layer assembly more than the outer wall width of the core component and both do not contact with each other；The outer layer assembly
Length is less than the core component；The sandwich material length is identical with the outer layer assembly；The inner layer material length and institute
State core component identical.Because the length of core component will be longer than the outer layer assembly and sandwich material, and Practical Project is at home and abroad
Layer assembly and sandwich material are not connected with the bean column node of core component, so this programme China and foreign countries layer assembly is substantially not stress
, the effect of lateral confinement is simply provided core component and concrete.
This is very different with double-layer nested steel pipe tool common in the prior art, though double-layer pipe of the prior art
So on cross-sectional structure from the middle part of component for this programme be the same, but because the length of its layer structure is in internal layer
Structure is identical, so being while bearing longitudinal force effect both during stress.
Further technical scheme of the invention is：The outer layer assembly is hollow cylindrical structure.Hollow cylinder structure energy
It is enough that the effect of identical lateral confinement is provided in all directions, so as to strengthen effect of contraction of the core component to inner layer material.
Further technical scheme of the invention is：The cross section of the core component is polygon.Polygon can bring
More preferable stress.
Further technical scheme of the invention is：The cross section of the core component is rectangle.
Further technical scheme of the invention is：The cross section of the core component is square.
Further technical scheme of the invention is：The manufacture material of the core component and the outer layer assembly is carbon
One kind in steel, stainless steel and high-strength steel.These materials are readily available, with low cost.
Further technical scheme of the invention is：The inner layer material prepares material for high performance concrete, high-strength mixed
One or more in solidifying soil, normal concrete and regeneration concrete；The material for preparing of the sandwich material is cement-based grout
In material, fiber reinforcement grouting material, structure glue, high performance concrete, high-strength concrete, normal concrete or regeneration concrete
One or more.These materials are readily available, with low cost.
The installation method of the steel tube confinement concrete-filled rectangular steel tube component of the sandwich of this programme, the method bag is described below
Include following steps：
Step A：Positioning step, the positioning step system is positioned core component and outer layer assembly by design；
Step B：Step is poured, the step system that pours fills inner layer material perfusion into the core component, by sandwich material
Note enters between the outer layer assembly and core component；
Step C：Curing step, the curing step system conserves to the product that step B is obtained.
Further technical scheme of the invention is, the step A include it is following step by step：
Step A1：Component step is made, design length interception rectangular core component and outer layer group are pressed by the making component step system
Part, or form circular skin component and core component by design requirement selection sheet material curling welding；
Step A2：Component fixing step, fixture, the fixation are inserted in the end of the core component and the outer layer assembly
Part system annular steel plate, is provided with the hollow out of rectangular or square, the hollow out shape and the core group in the middle of the fixture
The outer surface of part is identical, and the external diameter of the fixture is identical with the external diameter of the outer layer assembly, the fixture and the outer layer
Component spot welding is connected.Position between core component and outer layer assembly is ensured by fixture, it is ensured that both can be concentric.
Further technical scheme of the invention is：The step B include it is following step by step：
Step B1：Inner layer material pours step, and the inner layer material pours step system by concrete according in design proportioning preparation
Layer material, the surface laying polyethylene film of pair fixture contacted with sandwich material 45 simultaneously smears machine oil；Then in will be described
Layer material is irrigated to the core component, and fully vibrate to the inner layer material reach it is closely knit；
Step B2：Sandwich material pours step, and the sandwich material pours step system and prepares sandwich material according to design proportioning, will
The inner layer material is irrigated between the core component and the outer layer assembly, and is fully vibrated to the inner layer material and reached
It is closely knit；
The step C include it is following step by step：
Step C1：Test specimen to pouring completion is conserved；
Step C2：Remove the fixture used in step A2.
The beneficial effects of the invention are as follows：Compared with prior art, the invention has the advantages that：
（1）Outer layer round steel sleeve pipe does not undertake longitudinal load, to core side（Square）The steel pipe and core of shape concrete filled steel tubular member are mixed
Solidifying soil plays effect of contraction, and compared with conventional steel concrete component, the binding effect that core concrete is subject to is stronger, and its ductility can
It is further improved, the phenomenon that core concrete produces failure by shear is reduced, while outer layer round steel sleeve pipe is to core side
（Square）The steel pipe of shape concrete filled steel tubular member（Internal layer side（Square）Shape steel pipe）Producing effect of contraction can effectively prevent or delay internal layer
Steel pipe produces local buckling, and outer layer round steel sleeve pipe does not undertake longitudinal load, equally avoids the buckling problem of steel pipe, therefore this
Invention component will be effectively improved the failure mode of conventional steel concrete component；
（2）Outer layer round steel sleeve pipe is to core side（Square）The steel pipe and core concrete of shape steel core concrete column play effect of contraction, core
The binding effect enhancing that heart concrete is subject to, its bearing capacity can obtain further raising；The horizontal tension effect of inner layer steel pipe will
Weakened, its longitudinal stress is then accordingly improved, the contribution to element bearing capacity is bigger, with conventional steel concrete component phase
Than core concrete of the present invention is more effectively played with the mechanical property of steel pipe, and stress is clearly reasonable, and bearing capacity can obtain
Significantly improve；
（3）Outer layer round steel sleeve pipe does not undertake longitudinal load, it is to avoid the buckling problem of steel pipe, at the same can more effectively about beam core mix
Solidifying soil, alleviates the phenomenon of core concrete destruction；When component is set up defences earthquake by equivalent to this area seismic fortification intensity
During influence, it may occur however that damage, local route repair reinforcing is carried out to component using mode of the present invention, can be continuing with component, because
This present invention improve conventional steel concrete component shock resistance while also for the shake of component after repairing and reinforcement provide on the way
Footpath；
（4）Outer layer round steel sleeve pipe does not undertake longitudinal load, can weaken de- between loading initial stage inner layer steel pipe and core concrete
Phenomenon is opened, inner layer steel pipe is produced effect of contraction at the loading initial stage to core concrete, strengthen the mechanical property of component；This hair
It is bright can also effectively overcome core concrete to pour, maintenance method is improper or core concrete produce shrink, creep, temperature deformation is drawn
Problem that the inner layer steel pipe and the core concrete adhesion strength that rise are not enough, so as to improve inner layer steel pipe and concrete therebetween
Service behaviour；
（5）When the outer layer round steel sleeve pipe of component uses stainless steel tube, outer layer stainless steel tube will significantly improve the corrosion resistant of component
Corrosion energy, reduces preservative treatment operation, conventional steel concrete component can be extended into the Special Rings such as moist, Korrosionsmedium is strong
Used in border；
（6）The present invention is in original core side（Square）A layer interlayer material, interlayer material are had outsourced on the outside of shape concrete filled steel tubular member
The specific heat capacity of the specific heat ratio inner layer steel pipe of material is big, can effectively delay the heat transfer of fire, while outer layer round steel sleeve pipe is in fire
Longitudinal load is not undertaken under calamity effect, the above can improve core side（Square）The fire endurance of shape concrete filled steel tubular member.
Brief description of the drawings
In order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the steel tube confinement concrete-filled rectangular steel tube component of sandwich provided in an embodiment of the present invention
Figure.
Fig. 2 is that the steel tube confinement concrete-filled rectangular steel tube element cross-section of sandwich provided in an embodiment of the present invention is illustrated
Figure.
During Fig. 3 is the steel tube confinement concrete-filled rectangular steel tube component preparation process of sandwich provided in an embodiment of the present invention
Schematic diagram.
Fig. 4 be sandwich provided in an embodiment of the present invention steel tube confinement concrete-filled rectangular steel tube member processing method in it is solid
Determine the schematic diagram of part.
Reference：1- inner layer materials；2- core components；The outer layer assemblies of 3-；4- sandwich materials；5- fixtures.
Specific embodiment
The explanation of following embodiment is, with reference to additional schema, to be used to illustrate the particular implementation that the present invention may be used to implement
Example.The direction term that the present invention is previously mentioned, for example " on ", D score, "front", "rear", "left", "right", " interior ", " outward ", " side "
Deng being only the direction with reference to annexed drawings.Therefore, the direction term for using is to illustrate and understand the present invention, and is not used to
The limitation present invention.
Fig. 1 is the structural representation of the steel tube confinement concrete-filled rectangular steel tube component of sandwich provided in an embodiment of the present invention
Figure.As can be seen from Figure 1 this programme provide sandwich steel tube confinement concrete-filled rectangular steel tube component outward appearance.A kind of band
The steel tube confinement concrete-filled rectangular steel tube component of interlayer, by hollow cylinder structure core component 2 and hollow cylinder structure it is outer
The nested composition of layer assembly 3, is filled with sandwich material 4 between the outer layer assembly and the core component；In the core component
Portion is filled with inner layer material 1, and the cross section figure of the core component and the outer layer assembly is centrosymmetric image；It is described
The symmetrical centre of the cross section of core component and the outer layer assembly overlaps；The inwall width of the outer layer assembly is more than the core
The outer wall width of heart component and both do not contact with each other；The length of the outer layer assembly is less than the core component；The interlayer
Length of material is identical with the outer layer assembly；The inner layer material length is identical with the core component.
Fig. 2 is that the steel tube confinement concrete-filled rectangular steel tube element cross-section of sandwich provided in an embodiment of the present invention is illustrated
Figure.Figure it is seen that specific in the present embodiment, core component uses square structure, and outer layer assembly is tied using circular
Structure.
Because the length of core component will be longer than the outer layer assembly, so this programme China and foreign countries layer assembly is not received substantially
Power, the effect of lateral confinement is simply provided core component and concrete.Compared to traditional concrete filled steel tubular member, this hair
The bright cooperation performance strengthened between steel pipe and core concrete, improves the bearing capacity and ductility of component, improves component
Failure mode, strengthens antidetonation, the corrosion-resistant and fire resistance of component.
This is very different with double-layer nested steel pipe tool common in the prior art, though double-layer pipe of the prior art
So on cross-sectional structure from the middle part of component for this programme be the same, but because the length of its layer structure is in internal layer
Structure is identical, so being while bear longitudinal force effect, to make constraint of the layer structure steel pipe to endothecium structure both during stress
With can not give full play to.
In this programme, it is capable of achieving when the two ends of core component are than outer layer pipe and each longer sandwich material two ends outer
Layer assembly is not subject to longitudinal load completely, and in Practical Project, the outer layer assembly and sandwich material are elongated along the core component
Arrangement, but be not connected with the end of the core component and node in any form.
Further, the manufacture material of the core component and the outer layer assembly is carbon steel, stainless steel and high-strength steel
In one kind, to adapt to different requirement of engineering, particularly when outer layer assembly use stainless steel tube when, integrated member can be improved
Decay resistance and aesthetic.
Further, the inner layer material prepare material for high performance concrete, high-strength concrete, normal concrete and
One or more in regeneration concrete, to adapt to different engineerings the need for, when component be used for high-rise, high-rise building or it is big across
In degree arch bridge structure, high performance concrete and high-strength concrete can play bigger advantage and benefit, and work as core concrete and adopt
When using regeneration concrete, it is possible to resolve natural aggregate resources problem in short supply, the ecological environment in the protection aggregate place of production can solve city again
The problems such as stacking, occupation of land and environmental pollution of discarded object, with significant society, economical and environmentally friendly benefit.
The material for preparing of the sandwich material is cement-based grouting material, fiber reinforcement grouting material, structure glue, high-performance
One or more in concrete, high-strength concrete, normal concrete or regeneration concrete.These materials are readily available, cost
It is cheap.
The another object of this programme is a kind of preparation of the steel tube confinement concrete-filled rectangular steel tube component for providing sandwich
Method, the method is comprised the following steps：
Step A：Positioning step, the positioning step system is positioned core component and outer layer assembly by design；
Wherein, the step A include it is following step by step：
Step A1：Component step is made, design length interception rectangular core component and outer layer group are pressed by the making component step system
Part, or form circular skin component and core component by design requirement selection sheet material curling welding；
Step A2：Component fixing step, fixture 5 is inserted in the end of the core component and the outer layer assembly, and Fig. 3 is this
Schematic diagram in the steel tube confinement concrete-filled rectangular steel tube component preparation process of the sandwich that inventive embodiments are provided.From Fig. 3
It can be seen that the installation site of the fixture.The fixture system annular steel plate, Fig. 4 is band provided in an embodiment of the present invention
The schematic diagram of fixture in the steel tube confinement concrete-filled rectangular steel tube member processing method of interlayer.As can be seen from Figure 4 it is described
The hollow out of rectangle is provided with the middle of fixture, the hollow out shape is identical with the outer surface of the core component, the fixture
External diameter is identical with the external diameter of the outer layer assembly, and the fixture is connected with the outer layer assembly spot welding.Ensured by fixture
Position between core component and outer layer assembly, it is ensured that both can be concentric.
Step B：Pour step, it is described pour step system inner layer material perfusion is entered into the core component, by interlayer material
Material perfusion enters between the outer layer assembly and core component；
The step B include it is following step by step：
Step B1：Inner layer material pours step, and the inner layer material pours step system by concrete according in design proportioning preparation
Layer material, the surface laying polyethylene film of pair fixture contacted with sandwich material 45 simultaneously smears machine oil；Then in will be described
Layer material is irrigated to the core component, and fully vibrate to the inner layer material reach it is closely knit；
Step B2：Sandwich material pours step, and the sandwich material pours step system and prepares sandwich material according to design proportioning, will
The inner layer material is irrigated between the core component and the outer layer assembly, and is fully vibrated to the inner layer material and reached
It is closely knit.
Step C：Curing step, the curing step system conserves to the product that step B is obtained.
Specifically, the step C include it is following step by step：
Step C1：Test specimen to pouring completion is conserved；
Step C2：Remove the fixture used in step A2.
Compared with prior art, the invention has the advantages that：
（1）Outer layer round steel sleeve pipe does not undertake longitudinal load, to core side（Square）The steel pipe and core of shape concrete filled steel tubular member are mixed
Solidifying soil plays effect of contraction, and compared with conventional steel concrete component, the binding effect that core concrete is subject to is stronger, and its ductility can
It is further improved, the phenomenon that core concrete produces failure by shear is reduced, while outer layer round steel sleeve pipe is to core side
（Square）The steel pipe of shape concrete filled steel tubular member（Internal layer side（Square）Shape steel pipe）Producing effect of contraction can effectively prevent or delay internal layer
Steel pipe produces local buckling, and outer layer round steel sleeve pipe does not undertake longitudinal load, equally avoids the buckling problem of steel pipe, therefore this
Invention component will be effectively improved the failure mode of conventional steel concrete component；
（2）Outer layer round steel sleeve pipe is to core side（Square）The steel pipe and core concrete of shape steel core concrete column play effect of contraction, core
The binding effect enhancing that heart concrete is subject to, its bearing capacity can obtain further raising；The horizontal tension effect of inner layer steel pipe will
Weakened, its longitudinal stress is then accordingly improved, the contribution to element bearing capacity is bigger, with conventional steel concrete component phase
Than core concrete of the present invention is more effectively played with the mechanical property of steel pipe, and stress is clearly reasonable, and bearing capacity can obtain
Significantly improve；
（3）Outer layer round steel sleeve pipe does not undertake longitudinal load, it is to avoid the buckling problem of steel pipe, at the same can more effectively about beam core mix
Solidifying soil, alleviates the phenomenon of core concrete destruction；When component is set up defences earthquake by equivalent to this area seismic fortification intensity
During influence, it may occur however that damage, local route repair reinforcing is carried out to component using mode of the present invention, can be continuing with component, because
This present invention improve conventional steel concrete component shock resistance while also for the shake of component after repairing and reinforcement provide on the way
Footpath；
（4）Outer layer round steel sleeve pipe does not undertake longitudinal load, can weaken de- between loading initial stage inner layer steel pipe and core concrete
Phenomenon is opened, inner layer steel pipe is produced effect of contraction at the loading initial stage to core concrete, strengthen the mechanical property of component；This hair
It is bright can also effectively overcome core concrete to pour, maintenance method is improper or core concrete produce shrink, creep, temperature deformation is drawn
Problem that the inner layer steel pipe and the core concrete adhesion strength that rise are not enough, so as to improve inner layer steel pipe and concrete therebetween
Service behaviour；
（5）When the outer layer round steel sleeve pipe of component uses stainless steel tube, outer layer stainless steel tube will significantly improve the corrosion resistant of component
Corrosion energy, reduces preservative treatment operation, conventional steel concrete component can be extended into the Special Rings such as moist, Korrosionsmedium is strong
Used in border；
（6）The present invention is in original core side（Square）A layer interlayer material, interlayer material are had outsourced on the outside of shape concrete filled steel tubular member
The specific heat capacity of the specific heat ratio inner layer steel pipe of material is big, can effectively delay the heat transfer of fire, while outer layer round steel sleeve pipe is in fire
Longitudinal load is not undertaken under calamity effect, the above can improve core side（Square）The fire endurance of shape concrete filled steel tubular member.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (10)
1. the steel tube confinement concrete-filled rectangular steel tube component of a kind of sandwich, it is characterised in that：By the core of hollow cylinder structure
The outer layer assembly nested groups of component and hollow cylinder structure are into being filled with interlayer between the outer layer assembly and the core component
Material；Filled with inner layer material inside the core component, the cross section figure of the core component and the outer layer assembly is equal
Centered on symmetric figure；The symmetrical centre of the cross section of the core component and the outer layer assembly overlaps；The outer layer assembly
Inwall width more than the core component outer wall width and both do not contact with each other；The length of the outer layer assembly is less than institute
State core component；The sandwich material length is identical with the outer layer assembly；The inner layer material length and the core component
It is identical.
2. the steel tube confinement concrete-filled rectangular steel tube component of sandwich according to claim 1, it is characterised in that：It is described outer
Layer assembly is hollow cylindrical structure.
3. the steel tube confinement concrete-filled rectangular steel tube component of sandwich according to claim 1, it is characterised in that：The core
The cross section of heart component is polygon.
4. the steel tube confinement concrete-filled rectangular steel tube component of sandwich according to claim 3, it is characterised in that：The core
The cross section of heart component is rectangle.
5. the steel tube confinement concrete-filled rectangular steel tube component of sandwich according to claim 4, it is characterised in that：The core
The cross section of heart component is square.
6., according to the steel tube confinement concrete-filled rectangular steel tube component of any described sandwich in claim 1-5, its feature exists
In：The manufacture material of the core component and the outer layer assembly is the one kind in carbon steel, stainless steel and high-strength steel.
7., according to the steel tube confinement concrete-filled rectangular steel tube component of any described sandwich in claim 1-5, its feature exists
In：The inner layer material prepares material in high performance concrete, high-strength concrete, normal concrete and regeneration concrete
One or more；The material for preparing of the sandwich material is cement-based grouting material, fiber reinforcement grouting material, structure glue, height
One or more in performance concrete, high-strength concrete, normal concrete or regeneration concrete.
8. the preparation method of the steel tube confinement concrete-filled rectangular steel tube component of a kind of sandwich based on described in claim 1-7,
It is characterised in that it includes following steps：
Step A：Positioning step, the positioning step system is positioned core component and outer layer assembly by design；
Step B：Step is poured, the step system that pours fills inner layer material perfusion into the core component, by sandwich material
Note enters between the outer layer assembly and core component；
Step C：Curing step, the curing step system conserves to the product that step B is obtained.
9. the preparation method of the steel tube confinement concrete-filled rectangular steel tube component of sandwich according to claim 8, its feature
Be, the step A include it is following step by step：
Step A1：Component step is made, design length interception rectangular core component and outer layer group are pressed by the making component step system
Part, or form circular skin component and core component by design requirement selection sheet material curling welding；
Step A2：Component fixing step, fixture, the fixation are inserted in the end of the core component and the outer layer assembly
Part system annular steel plate, is provided with the hollow out of rectangle in the middle of the fixture, the appearance of the hollow out shape and the core component
Face is identical, and the external diameter of the fixture is identical with the external diameter of the outer layer assembly, the fixture and the outer layer assembly spot welding
It is connected.
10. the preparation method of the steel tube confinement concrete-filled rectangular steel tube component of sandwich according to claim 9, its feature
Be, the step B include it is following step by step：
Step B1：Inner layer material pours step, and the inner layer material pours step system by concrete according in design proportioning preparation
Layer material, the inner layer material is irrigated to the core component, and fully vibrate to the inner layer material reach it is closely knit；
Step B2：Sandwich material pours step, and the sandwich material pours step system and prepares sandwich material according to design proportioning, will
The inner layer material is irrigated between the core component and the outer layer assembly, and is fully vibrated to the inner layer material and reached
It is closely knit；
The step C include it is following step by step：
Step C1：Test specimen to pouring completion is conserved；
Step C2：Remove the fixture used in step A2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN108360749A (en) * | 2018-02-12 | 2018-08-03 | 哈尔滨工大嘉图科技发展有限公司 | A kind of FRP- steel interlining composite pipes concrete column and preparation method thereof |
| CN108532833A (en) * | 2018-05-15 | 2018-09-14 | 长江大学 | A kind of regeneration concrete coupled column and preparation method thereof |
| CN109025066A (en) * | 2018-09-25 | 2018-12-18 | 中南大学 | A kind of assembled hollow sandwich steel tube concrete pole and preparation method thereof |
| CN113502981A (en) * | 2021-07-06 | 2021-10-15 | 长江大学 | Steel pipe concrete structure with fireproof, anti-collision and shockproof functions and manufacturing process |
| CN114214918A (en) * | 2021-12-31 | 2022-03-22 | 山东大学 | Socket assembling type arch rib, arch bridge, manufacturing method and construction method |
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