CN207332114U - A kind of steel tube confinement concrete-filled rectangular steel tube component of sandwich - Google Patents
A kind of steel tube confinement concrete-filled rectangular steel tube component of sandwich Download PDFInfo
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- CN207332114U CN207332114U CN201720237242.1U CN201720237242U CN207332114U CN 207332114 U CN207332114 U CN 207332114U CN 201720237242 U CN201720237242 U CN 201720237242U CN 207332114 U CN207332114 U CN 207332114U
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Abstract
The utility model discloses a kind of steel tube confinement concrete-filled rectangular steel tube component of sandwich, the concrete filled steel tube new type of component of the steel tube confinement of wherein described sandwich is made 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 not attached along the elongated arrangement in core concrete filled steel tubular member surface and with the end of core component and bean column node, the utility model can strengthen the co-operation performance between core component steel pipe and core concrete, improve the bearing capacity and ductility of component, improve the failure mode of component, strengthen the antidetonation of component, corrosion-resistant and fire resistance；The utility model principle is clear, excellent in mechanical performance, engineering cost are relatively low.
Description
Technical field
The utility model belongs to building structural element field, more particularly to a kind of steel tube confinement rectangular steel pipe of sandwich mixes
Solidifying soil component.
Background technology
The combined member that concrete filled steel tube refers to the fill concrete in steel pipe and formed.Concrete filled steel tubular member is in stress mistake
Cheng Zhong, steel pipe makes the effect of contraction of concrete concrete to be in the stress state of three dimension stress, 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 avoid or delay steel pipe
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, accelerate 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 project cost.By steel pipe
Concrete filled steel tube is combined into coagulation local soil type, by the interaction of steel pipe and core concrete, can not only make up two kinds of materials
The shortcomings that respective, and the advantages 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 be subject to engineering circles because of its superior mechanical property, in skyscraper and long-span bridge
It is more and more widely used in beam.
But concrete filled steel tube applied in Practical Project in there is also shortcoming, specifically include：
（1）Steel core concrete column is under xial feed effect, and steel pipe undertakes longitudinal load at the same time with core concrete, therefore
Steel pipe fails to be not fully exerted to the binding effect of core concrete, especially for steel pipe high strength concrete column reinforcing, steel pipe pair
The binding effect of core concrete is not notable, and core high-strength concrete is also easy to produce shearing conquassation in loading process and destroys；For
Side（Square）Shape concrete filled steel tubular member, steel pipe uneven, steel pipe angle in concrete section to the effect of contraction of core concrete
Concrete be confined concrete in the middle part of portion and section, and steel plate rigidity of middle is weaker, after steel pipe flexing or even and inner concrete
Departing from, near middle concrete is unconfinement concrete, compared with circular steel tube concrete, side（Square）The steel of shape concrete filled steel tube
Improvement of the pipe to core concrete mechanical property is weaker；
（2）For concrete filled steel tubular member under xial feed effect, steel pipe is typically in the stress of the horizontal tension of longitudinal direction compression
State, 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
The lateral confinement effect gradually enhancing of concrete, particularly after steel pipe is surrendered, the longitudinal stress of steel pipe is with its lateral stress
Increase and gradually reduce, is 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
It may be damaged, its steel pipe is likely to be breached surrender or produces flexing, and component, which need to carry out repairing and reinforcement, can just be continuing with；
（4）Concrete filled steel tubular member is under xial feed effect, and at the initial stage of loading, steel pipe is in bullet with core concrete
Sexual stage, since 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,
This, which causes to produce between steel pipe and core concrete, disengages phenomenon, especially for thin-wall steel tube high-strength concrete component, high-strength core
Heart concrete is small in loading transversely deforming at initial stage, and thin-wall steel tube and core concrete disengagement phenomenon are more notable；In addition, actual work
In journey due to the pouring of core concrete, maintenance method is improper or core concrete produce shrink, creeping can lead with temperature deformation
Cause to produce phenomenon of coming to nothing between steel pipe and core concrete, above phenomenon can influence the phase interaction of steel pipe and core concrete
With making steel pipe to produce larger initial stress initial stage in loading, so as to influence the mechanical property of component；
（5）In actual concrete filled steel tubular member, steel pipe because its poor corrosion resistance need to periodically carry out stringent preservative treatment,
Otherwise corrosion easily occurs, influences the durability and mechanical property of component, limits such component in some particular surroundings
Use, such as Ultra-Long Spans CFST Arch Bridge is because the rotproofness difference of outer layer pipe causes it in development of coastal area and answers
With being restricted；
（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,
The intensity and elasticity modulus of steel pipe strongly reduce, so as to reduce the bearing capacity of concrete filled steel tubular member, therefore in Practical Project, are
The fire resistance of concrete filled steel tubular member is improved, is still needed in outer surface of steel tube sprayed fire proofing protective layer, so as to increase project cost.
For this reason, it is necessary to design a kind of new concrete filled steel tube component, component steel pipe can be strengthened core is mixed
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.
Utility model content
The purpose of this utility model is to provide a kind of steel tube confinement concrete-filled rectangular steel tube component of sandwich, it is intended to solves
The deficiency of certainly existing concrete filled steel tubular member technology, to strengthen the co-operation between core component steel pipe and core concrete
Performance, improves the bearing capacity and ductility of component, improves the failure mode of component, strengthens the antidetonation of component, corrosion-resistant and fire resistance
Energy.
The utility model is realized in this way a kind of steel tube confinement concrete-filled rectangular steel tube component of sandwich, by hollow
The outer layer assembly nested groups of the core component of column structure and hollow cylinder structure are into the outer layer assembly and the core component
Between be filled with sandwich material；Inner layer material, the core component and the outer layer assembly are filled with inside the core component
Cross section figure be centrosymmetric image；The symmetrical centre weight of the cross section of the core component and the outer layer assembly
Close；The inner wall width of the outer layer assembly is more than the outer wall width of the core component and both do not contact with each other；The outer layer
The length of component is less than the core component；The sandwich material length is identical with the outer layer assembly；The inner layer material length
Degree is identical with the core component.Since the length of core component will be longer than the outer layer assembly and sandwich material, and actual work
Journey China and foreign countries 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
Do not stress, the effect of lateral confinement is simply provided core component and concrete.
This is very different with common double-layer nested steel pipe tool in the prior art, though double-layer pipe of the prior art
So from the cross-sectional structure in the middle part of component for this programme be the same, but since the length of its layer structure is in internal layer
Structure is identical, so being to bear longitudinal force effect at the same time both during stress.
The further technical solution of the utility model is：The outer layer assembly is hollow cylindrical structure.Hollow cylinder knot
Structure can provide identical lateral confinement effect in all directions, make so as to strengthen constraint of the core component to inner layer material
With.
The further technical solution of the utility model is：The cross section of the core component is polygon.Polygon can
Bring more preferable stress.
The further technical solution of the utility model is：The cross section of the core component is rectangle.
The further technical solution of the utility model is：The cross section of the core component is square.
The further technical solution of the utility model is：The manufacture material of the core component and the outer layer assembly is carbon
One kind in plain steel, stainless steel and high-strength steel.These materials are readily available, of low cost.
The further technical solution of the utility model is：The inner layer material prepares material as high performance concrete, height
One or more in reinforced concrete, normal concrete and regeneration concrete；The material for preparing of the sandwich material is cement base
Grouting material, fiber reinforcement grouting material, structure glue, high performance concrete, high-strength concrete, normal concrete or regeneration coagulation
One or more in soil.These materials are readily available, of low cost.
The beneficial effects of the utility model are：Compared with prior art, the utility model has the advantages that：
（1）Outer layer round steel casing does not undertake longitudinal load, to core side（Square）The steel pipe and core of shape concrete filled steel tubular member
Heart concrete plays effect of contraction, and compared with conventional steel concrete component, the binding effect that core concrete is subject to is stronger, it prolongs
Property can obtain further improvement, reduce the phenomenon that core concrete produces failure by shear, while outer layer round steel casing 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 interior
Layer steel pipe produces local buckling, and outer layer round steel casing does not undertake longitudinal load, equally avoids the buckling problem of steel pipe, therefore
The utility model component will be effectively improved the failure mode of conventional steel concrete component；
（2）Outer layer round steel casing is to core side（Square）The steel pipe and core concrete of shape steel core concrete column play constraint and make
With the binding effect enhancing that core concrete is subject to, its bearing capacity can be further improved；The horizontal tension of inner layer steel pipe is made
With that will be weakened, its longitudinal stress then accordingly improves, the contribution bigger to element bearing capacity, with conventional steel concrete component
Compare, the mechanical property of the utility model core concrete and steel pipe is more effectively played, and stress is clearly reasonable, bearing capacity
It can be significantly improved；
（3）Outer layer round steel casing does not undertake longitudinal load, avoids the buckling problem of steel pipe, while can more effectively constrain core
Heart concrete, alleviates the phenomenon of core concrete destruction；When component is set up defences by equivalent to this area seismic fortification intensity
During earthquake effect, it may occur however that damage, carries out local route repair reinforcing to component using the utility model mode, can continue component
Use, therefore the utility model also adds while conventional steel concrete component shock resistance is improved to be repaired after the shake of component
Admittedly provide approach；
（4）Outer layer round steel casing does not undertake longitudinal load, can weaken between loading inner layer steel pipe at initial stage and core concrete
Disengagement phenomenon, inner layer steel pipe is produced effect of contraction initial stage in loading to core concrete, strengthen the mechanical property of component；
The utility model can also effectively overcome core concrete to pour, maintenance method is improper or core concrete produces and shrinks, creeps, is warm
The problem of inner layer steel pipe caused by degree deformation and insufficient core concrete adhesion strength, so as to improve inner layer steel pipe and concrete two
Working performance between person；
（5）When the outer layer round steel casing of component uses stainless steel tube, outer layer stainless steel tube will significantly improve component
Corrosion resistance, reduces preservative treatment process, and conventional steel concrete component can be extended to the spies such as moist, Korrosionsmedium is strong
Used in different environment；
（6）The utility model is in original core side（Square）A layer interlayer material is had outsourced on the outside of shape concrete filled steel tubular member
Material, the specific heat capacity of the specific heat ratio inner layer steel pipe of sandwich material is big, can effectively delay the heat transfer of fire, while outer layer round steel
Casing does not undertake longitudinal load under fire effect, and the above can improve core side（Square）The fire resisting pole of shape concrete filled steel tubular member
Limit.
Brief description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to embodiment or existing
There is attached drawing needed in technology description to be 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, without creative efforts,
Other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is that the structure of the steel tube confinement concrete-filled rectangular steel tube component for the sandwich that the utility model embodiment provides is shown
It is intended to.
Fig. 2 is the steel tube confinement concrete-filled rectangular steel tube element cross-section for the sandwich that the utility model embodiment provides
Schematic diagram.
Fig. 3 is the steel tube confinement concrete-filled rectangular steel tube component preparation process for the sandwich that the utility model embodiment provides
In schematic diagram.
Fig. 4 is the steel tube confinement concrete-filled rectangular steel tube member processing method for the sandwich that the utility model embodiment provides
The schematic diagram of middle fixing piece.
Reference numeral：1- inner layer materials；2- core components；The outer layer assemblies of 3-；4- sandwich materials；5- fixing pieces.
Embodiment
The explanation of following embodiment is with reference to additional schema, and the specific of implementation is can be used to illustrate the utility model
Embodiment.The direction term that the utility model is previously mentioned, for example, " on ", " under ", "front", "rear", "left", "right", " interior ", "
Outside ", " side " etc., is only the direction with reference to annexed drawings.Therefore, the direction term used is to illustrate and understand this practicality
It is new, and it is not used to limitation the utility model.
Fig. 1 is that the structure of the steel tube confinement concrete-filled rectangular steel tube component for the sandwich that the utility model embodiment provides is shown
It is intended to.As can be seen from Figure 1 the appearance of the steel tube confinement concrete-filled rectangular steel tube component for the sandwich that this programme provides.It is a kind of
The steel tube confinement concrete-filled rectangular steel tube component of sandwich, by the core component 2 and hollow cylinder structure of hollow cylinder structure
The outer nested composition of layer assembly 3, is filled with sandwich material 4 between the outer layer assembly and the core component；The core component
Inside is filled with inner layer material 1, and the cross section figure of the core component and the outer layer assembly is centrosymmetric image；Institute
The symmetrical centre for stating the cross section of core component and the outer layer assembly overlaps；The inner wall width of the outer layer assembly is more than described
The outer wall width of core component and both do not contact with each other；The length of the outer layer assembly is less than the core component；The folder
Layer material length is identical with the outer layer assembly；The inner layer material length is identical with the core component.
Fig. 2 is the steel tube confinement concrete-filled rectangular steel tube element cross-section for the sandwich that the utility model embodiment provides
Schematic diagram.Figure it is seen that specific in the present embodiment, core component uses square structure, and outer layer assembly is using circle
Shape structure.
Since the length of core component will be longer than the outer layer assembly, thus this programme China and foreign countries layer assembly be substantially from
Power, the effect of lateral confinement is simply provided core component and concrete.Compared to traditional concrete filled steel tubular member, this reality
With the new co-operation performance strengthened between steel pipe and core concrete, the bearing capacity and ductility of component are improved, improves structure
The failure mode of part, strengthens the antidetonation of component, corrosion-resistant and fire resistance.
This is very different with common double-layer nested steel pipe tool in the prior art, though double-layer pipe of the prior art
So from the cross-sectional structure in the middle part of component for this programme be the same, but since the length of its layer structure is in internal layer
Structure is identical, so being to bear longitudinal force effect at the same time both during stress, makees constraint of the layer structure steel pipe to endothecium structure
With cannot give full play to.
In the present solution, it can be achieved when the both ends of core component are than outer layer pipe and each longer sandwich material both 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 in any form with the end of the core component and node.
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 uses stainless steel tube, integrated member can be improved
Corrosion resistance and aesthetic effect.
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 the needs of different engineerings, when component be used for high-rise, high-rise building or greatly across
To spend in arch bridge structure, high performance concrete and high-strength concrete can play the advantage and benefit of bigger, and when core concrete is adopted
During with regeneration concrete, it can solve the problems, such as that natural aggregate resources are in short supply, the ecological environment in the protection aggregate place of production, and city can be solved
The problems such as stacking, occupation of land and environmental pollution of discarded object, have significant society, economical and environmentally friendly benefit.
The sandwich material prepares material as 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.
Next the preparation method of the steel tube confinement concrete-filled rectangular steel tube component of the sandwich of this programme offer is provided, should
Method comprises the following steps：
Step A：Positioning step, the positioning step system are positioned core component and outer layer assembly by design；
Wherein, the step A include it is following step by step：
Step A1：Making component step, the making component step system is by design length interception rectangular core component and outside
Layer assembly, or choose plate curling welding by design requirement and form circular skin component and core component；
Step A2：Component fixing step, fixing piece 5, Fig. 3 is inserted into the end of the core component and the outer layer assembly
Be the utility model embodiment provide sandwich steel tube confinement concrete-filled rectangular steel tube component preparation process in schematic diagram.
As can be seen from Figure 3 the installation site of the fixing piece.The fixing piece system circular ring shape steel plate, Fig. 4 are the utility model realities
The schematic diagram of fixing piece in the steel tube confinement concrete-filled rectangular steel tube member processing method of the sandwich of example offer is provided.From Fig. 4
It can be seen that being equipped with the hollow out of rectangle among the fixing piece, the hollow out shape is identical with the outer surface of the core component,
The outside diameter of the fixing piece is identical with the outside diameter of the outer layer assembly, and the fixing piece is connected with the outer layer assembly spot welding.It is logical
Cross the position between fixing piece guarantee core component and outer layer assembly, it is ensured that both can be concentric.
Step B：Pour step, it is described pour step system and irrigate inner layer material enter 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 to design proportioning system
Standby inner layer material, the surface of pair fixing piece 5 contacted with sandwich material 4 are laid with polyethylene film and smear machine oil；Then by institute
State inner layer material to irrigate to the core component, and fully vibrate and reach closely knit to the inner layer material；
Step B2：Sandwich material pours step, and the sandwich material pours step system and prepares interlayer material according to design proportioning
Material, the inner layer material is irrigated between the core component and the outer layer assembly, and is fully vibrated to the internal layer material
Material reaches closely knit.
Step C：Curing step, the curing step system conserve the step B products obtained.
Specifically, the step C include it is following step by step：
Step C1：The test specimen for pouring completion is conserved；
Step C2：Remove the fixing piece used in step A2.
Compared with prior art, the utility model has the advantages that：
（1）Outer layer round steel casing does not undertake longitudinal load, to core side（Square）The steel pipe and core of shape concrete filled steel tubular member
Heart concrete plays effect of contraction, and compared with conventional steel concrete component, the binding effect that core concrete is subject to is stronger, it prolongs
Property can obtain further improvement, reduce the phenomenon that core concrete produces failure by shear, while outer layer round steel casing 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 interior
Layer steel pipe produces local buckling, and outer layer round steel casing does not undertake longitudinal load, equally avoids the buckling problem of steel pipe, therefore
The utility model component will be effectively improved the failure mode of conventional steel concrete component；
（2）Outer layer round steel casing is to core side（Square）The steel pipe and core concrete of shape steel core concrete column play constraint and make
With the binding effect enhancing that core concrete is subject to, its bearing capacity can be further improved；The horizontal tension of inner layer steel pipe is made
With that will be weakened, its longitudinal stress then accordingly improves, the contribution bigger to element bearing capacity, with conventional steel concrete component
Compare, the mechanical property of the utility model core concrete and steel pipe is more effectively played, and stress is clearly reasonable, bearing capacity
It can be significantly improved；
（3）Outer layer round steel casing does not undertake longitudinal load, avoids the buckling problem of steel pipe, while can more effectively constrain core
Heart concrete, alleviates the phenomenon of core concrete destruction；When component is set up defences by equivalent to this area seismic fortification intensity
During earthquake effect, it may occur however that damage, carries out local route repair reinforcing to component using the utility model mode, can continue component
Use, therefore the utility model also adds while conventional steel concrete component shock resistance is improved to be repaired after the shake of component
Admittedly provide approach；
（4）Outer layer round steel casing does not undertake longitudinal load, can weaken between loading inner layer steel pipe at initial stage and core concrete
Disengagement phenomenon, inner layer steel pipe is produced effect of contraction initial stage in loading to core concrete, strengthen the mechanical property of component；
The utility model can also effectively overcome core concrete to pour, maintenance method is improper or core concrete produces and shrinks, creeps, is warm
The problem of inner layer steel pipe caused by degree deformation and insufficient core concrete adhesion strength, so as to improve inner layer steel pipe and concrete two
Working performance between person；
（5）When the outer layer round steel casing of component uses stainless steel tube, outer layer stainless steel tube will significantly improve component
Corrosion resistance, reduces preservative treatment process, and conventional steel concrete component can be extended to the spies such as moist, Korrosionsmedium is strong
Used in different environment；
（6）The utility model is in original core side（Square）A layer interlayer material is had outsourced on the outside of shape concrete filled steel tubular member
Material, the specific heat capacity of the specific heat ratio inner layer steel pipe of sandwich material is big, can effectively delay the heat transfer of fire, while outer layer round steel
Casing does not undertake longitudinal load under fire effect, and the above can improve core side（Square）The fire resisting pole of shape concrete filled steel tubular member
Limit.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
- A kind of 1. steel tube confinement concrete-filled rectangular steel tube component 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；It is 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 Inner wall width be 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 sandwich in claim 1-5, its feature exists In：The manufacture material of the core component and the outer layer assembly is one kind in carbon steel, stainless steel and high-strength steel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720237242.1U CN207332114U (en) | 2017-03-10 | 2017-03-10 | A kind of steel tube confinement concrete-filled rectangular steel tube component of sandwich |
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|---|---|---|---|
| CN201720237242.1U CN207332114U (en) | 2017-03-10 | 2017-03-10 | A kind of steel tube confinement concrete-filled rectangular steel tube component of sandwich |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917470A (en) * | 2017-03-10 | 2017-07-04 | 哈尔滨工业大学深圳研究生院 | The steel tube confinement concrete-filled rectangular steel tube component and its processing method of a kind of sandwich |
| CN112942682A (en) * | 2021-01-27 | 2021-06-11 | 上海绿地建设(集团)有限公司 | Multicavity steel core concrete column |
-
2017
- 2017-03-10 CN CN201720237242.1U patent/CN207332114U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106917470A (en) * | 2017-03-10 | 2017-07-04 | 哈尔滨工业大学深圳研究生院 | The steel tube confinement concrete-filled rectangular steel tube component and its processing method of a kind of sandwich |
| CN112942682A (en) * | 2021-01-27 | 2021-06-11 | 上海绿地建设(集团)有限公司 | Multicavity steel core concrete column |
| CN112942682B (en) * | 2021-01-27 | 2022-06-14 | 上海绿地建设(集团)有限公司 | Multicavity steel core concrete column |
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