CN206681263U - A kind of concrete filled steel tube new type of component of steel tube confinement - Google Patents

A kind of concrete filled steel tube new type of component of steel tube confinement Download PDF

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Publication number
CN206681263U
CN206681263U CN201720235556.8U CN201720235556U CN206681263U CN 206681263 U CN206681263 U CN 206681263U CN 201720235556 U CN201720235556 U CN 201720235556U CN 206681263 U CN206681263 U CN 206681263U
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component
core
concrete
steel tube
layer
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郭兰慧
张素梅
陈杰
王玉银
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Shenzhen Graduate School Harbin Institute of Technology
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Shenzhen Graduate School Harbin Institute of Technology
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Abstract

The utility model discloses a kind of concrete filled steel tube new type of component of steel tube confinement, the concrete filled steel tube new type of component of wherein described steel tube confinement is made up of outer layer pipe and core concrete filled steel tubular member, and the outer layer pipe only provides core concrete filled steel tube sidewise restraint effect;The outer layer pipe and core concrete filled steel tubular member are circle;Both are brought into close contact;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 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 the antidetonation and decay resistance of component;The utility model principle is clear, excellent in mechanical performance, engineering cost are relatively low.

Description

A kind of concrete filled steel tube new type of component of steel tube confinement
Technical field
The utility model belongs to building structural element field, more particularly to a kind of new structure of the concrete filled steel tube of steel tube confinement Part.
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 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 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, 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, 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 by engineering circles because of its superior mechanical property, in skyscraper and long-span bridge More and more extensive application has been obtained in beam.
But concrete filled steel tube applied in Practical Project in there is also weak point, specifically include:
(1)Steel core concrete column is under xial feed effect, and steel pipe undertakes longitudinal load simultaneously 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 destroyed;
(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, be 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, 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, 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 strict 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 because the rotproofness difference of outer layer pipe causes its development and application in coastal area It is restricted;
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, improves the bearing capacity and ductility of component, improves the failure mode of component, strengthens the antidetonation and corrosion resistant of component Corrosion energy.
Utility model content
The purpose of this utility model is the concrete filled steel tube new type of component for providing a kind of steel tube confinement, it is intended to solves existing The deficiency of concrete filled steel tubular member technology, to strengthen the cooperation performance between core component steel pipe and core concrete, The bearing capacity and ductility of component are improved, improves the failure mode of component, strengthens the antidetonation and decay resistance of component.
The utility model is achieved in that a kind of concrete filled steel tube new type of component of steel tube confinement, by hollow cylinder knot The outer layer assembly nested groups of the core component of structure and hollow cylinder structure into, be filled with inner layer material inside the core component, The inner layer material length is identical with the core component;The cross section figure of the core component and the outer layer assembly is The center of circle of the cross section of cylinder, the core component and the outer layer assembly overlaps;Inwall width of the outer layer assembly etc. In the outer wall width of the core component;The length of the outer layer assembly is less than the core component.Due to the length of core component Degree will be longer than the outer layer assembly, and Practical Project China and foreign countries layer assembly is not connected with the bean column node of core component, so our Case China and foreign countries layer assembly is substantially to be not subject to longitudinal force effect, simply provides core component and concrete the work of lateral confinement With.
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 because the length of its layer structure is in internal layer Structure is identical, so being to bear longitudinal force effect simultaneously both during stress, makees constraint of the layer structure steel pipe to endothecium structure With can not give full play to.
It is of the present utility model further technical scheme be: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, and cost is cheap.
It is of the present utility model further technical scheme be:The inner layer material prepares material as high performance concrete, height One or more in reinforced concrete, normal concrete and regeneration concrete.
The beneficial effects of the utility model are:Compared with prior art, the utility model has the advantages that:
(1)Outer layer sleeve does not undertake longitudinal load, and the steel pipe and core concrete to core concrete filled steel tubular member rise about Shu Zuoyong, compared with conventional steel concrete component, the binding effect that core concrete is subject to is stronger, and its ductility can be obtained into one Step improves, and reduces the phenomenon that core concrete produces failure by shear, while outer layer sleeve is to core concrete filled steel tubular member Steel pipe produces effect of contraction and can effectively prevent or delay inner layer steel pipe to produce local buckling, and outer layer sleeve does not undertake longitudinal lotus Carry, equally avoid the buckling problem of steel pipe, therefore the utility model component will be effectively improved conventional steel concrete component Failure mode;
(2)Outer layer sleeve plays effect of contraction, core concrete to the steel pipe and core concrete of core steel core concrete column The binding effect enhancing being subject to, its bearing capacity can obtain further raising;The horizontal tension effect of inner layer steel pipe will be weakened, Its longitudinal stress then accordingly improves, and the contribution to element bearing capacity is bigger, and compared with conventional steel concrete component, this practicality is new The mechanical property of type core concrete and steel pipe is more effectively played, and stress is clearly reasonable, and bearing capacity, which can obtain, significantly to be carried It is high;
(3)Outer layer sleeve does not undertake longitudinal load, avoids the buckling problem of steel pipe, while can more effectively about beam core mixes Solidifying soil, alleviate 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, carry out local route repair reinforcing to component using the utility model mode, component can be made to continue to make With, therefore the utility model is also repairing and reinforcement after the shake of component while conventional steel concrete component shock resistance is improved Provide approach;
(4)Outer layer sleeve does not undertake longitudinal load, can weaken de- between loading inner layer steel pipe at initial stage and core concrete Phenomenon is opened, inner layer steel pipe is produced effect of contraction initial stage in loading to core concrete, strengthens the mechanical property of component;This reality With it is new can also effectively overcome core concrete to pour, maintenance method is improper or core concrete produce shrinks, creep, temperature change The problem of inner layer steel pipe caused by shape and core concrete adhesion strength deficiency, so as to improve both inner layer steel pipe and concrete it Between service behaviour;
(5)When the outer layer sleeve of component uses stainless steel tube, outer layer stainless steel tube will significantly improve the corrosion resistant of component Corrosion energy, preservative treatment process is reduced, conventional steel concrete component can be extended to the Special Rings such as moist, Korrosionsmedium is strong Used in border.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art There is the required accompanying drawing used 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, 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 concrete filled steel tube new type of component for the steel tube confinement that the utility model embodiment provides.
Fig. 2 is the cross section signal of the concrete filled steel tube new type of component for the steel tube confinement that the utility model embodiment provides Figure.
Reference:1- inner layer materials;2- core components;The outer layer assemblies of 3-.
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., only it is the direction with reference to annexed drawings.Therefore, the direction term used is to illustrate and understand this practicality It is new, and be not used to limit the utility model.
Core component and outer layer assembly use cylindrical structure, but this programme core component and outer layer group in the present embodiment Part can also use the structure of other shapes to prepare.
Fig. 1 is the structural representation of the concrete filled steel tube new type of component for the steel tube confinement that the utility model embodiment provides. As can be seen from Figure 1 the outward appearance of the concrete filled steel tube new type of component for the steel tube confinement that this programme provides.A kind of steel tube confinement Concrete filled steel tube new type of component, by the core component 2 of hollow cylinder structure and the nested groups of outer layer assembly 3 of hollow cylinder structure Into the core component inside is filled with inner layer material 1, and the inner layer material length is identical with the core component.The core The cross section figure of heart component and the outer layer assembly is cylinder, the cross section of the core component and the outer layer assembly The center of circle overlap;The inwall width of the outer layer assembly is equal to the outer wall width of the core component;The length of the outer layer assembly Degree is less than the core component.From figure 1 it appears that the both ends of the core component exceed the distance phase of the outer layer assembly Together.Because the length of core component will be longer than the outer layer assembly, so this programme China and foreign countries layer assembly is substantially what is do not stressed, The effect of lateral confinement is simply provided core component and concrete.
Fig. 2 is the cross section signal of the concrete filled steel tube new type of component for the steel tube confinement that the utility model embodiment provides Figure.Figure it is seen that specific in the present embodiment, core component uses circular configuration, and outer layer assembly is also using circular knot Structure.
Because the length of core component will be longer than the outer layer assembly, thus this programme China and foreign countries layer assembly be substantially not by 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 cooperation performance strengthened between steel pipe and core concrete, the bearing capacity and ductility of component are improved, improves structure The failure mode of part, strengthen antidetonation, the decay resistance of component.
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 because the length of its layer structure is in internal layer Structure is identical, so being to bear longitudinal force effect simultaneously both during stress, makees constraint of the layer structure steel pipe to endothecium structure With can not give full play to.
In this programme, it is complete that outer layer component can be achieved when the both ends of core component are more each than outer layer pipe both ends longer Not by longitudinal load, in Practical Project, the outer layer assembly along the elongated arrangement of the core component, but not in any form with The end of the core component and node are connected.
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 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 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 bigger advantage and benefit, and when core concrete is adopted During with regeneration concrete, can solve natural aggregate resources problem in short supply, the ecological environment in the protection aggregate place of production, and can solves city The problems such as stacking, occupation of land and environmental pollution of discarded object, there is significant society, economical and environmentally friendly benefit.
Next introduce steel tube confinement in this programme concrete filled steel tube new type of component preparation method, this method include with Lower step:
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:Component step is made, the making component step system is by design length interception core component and outer layer group Part forms core component and outer layer assembly by design requirement selection sheet material curling welding;
Step A2:Unit clean step, outer wall and the outer layer of the unit clean step system to the core component The internal diameter of component is derusted and cleaning treatment;
Step A3:Core component is nested into the outer layer assembly by component fixing step, the component fixing step system, Or wrap up the core component with the outer layer assembly of curling and weld.
Step B:Step is poured, concrete is prepared inner layer material according to design proportioning, then will by the step system that pours The inner layer material is irrigated to the core component, and is fully vibrated and reached closely knit to the inner layer material;
Step C:Curing step, the curing step system conserve to the step B products obtained.
Compared with prior art, the utility model has the advantages that:
(1)Outer layer steel sleeve does not undertake longitudinal load, and the steel pipe and core concrete to core concrete filled steel tubular member rise Effect of contraction, compared with conventional steel concrete component, the binding effect that core concrete is subject to is stronger, and its ductility can be entered One step improves, and reduces the phenomenon that core concrete produces failure by shear, while outer layer round steel sleeve pipe mixes to core round steel pipe Coagulate the steel pipe of native component(Internal layer round steel pipe)Producing effect of contraction can effectively prevent or delay inner layer steel pipe to produce local buckling, And outer layer round steel sleeve pipe does not undertake longitudinal load, the buckling problem of steel pipe is equally avoided, therefore the utility model component will have Effect improves the failure mode of conventional steel concrete component;
(2)Outer layer round steel sleeve pipe plays effect of contraction, core to the steel pipe and core concrete of core circular steel tube concrete post 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 then accordingly improves, and the contribution to element bearing capacity is bigger, with conventional steel concrete component phase Than the mechanical property of the utility model core concrete and steel pipe is more effectively played, and stress is clearly reasonable, and bearing capacity can It is significantly improved;
(3)Outer layer round steel sleeve pipe does not undertake longitudinal load, avoids the buckling problem of steel pipe, while can more effectively constrain core Heart concrete, alleviate 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, carry out local route repair reinforcing to component using the utility model mode, component can be continued 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 sleeve pipe 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, be warm The problem of inner layer steel pipe is with core concrete adhesion strength deficiency caused by degree deformation, so as to improve inner layer steel pipe and concrete two Service behaviour between person;
(5)When the outer layer round steel sleeve pipe of component uses stainless steel tube, outer layer stainless steel tube will significantly improve component Decay resistance, preservative treatment process is reduced, conventional steel concrete component can be extended to the spies such as moist, Korrosionsmedium is strong Used in different environment.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model 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 (4)

  1. A kind of 1. concrete filled steel tube new type of component of steel tube confinement, it is characterised in that:By hollow cylinder structure core component and The outer layer assembly nested groups of hollow cylinder structure are into the core component inside is filled with inner layer material, the inner layer material length Degree is identical with the core component;The cross section figure of the core component and the outer layer assembly is cylinder, the core The center of circle of the cross section of heart component and the outer layer assembly overlaps;The inwall width of the outer layer assembly is equal to the core component Outer wall width;The length of the outer layer assembly is less than the core component.
  2. 2. the concrete filled steel tube new type of component of steel tube confinement according to claim 1, it is characterised in that:The outer layer assembly It is not attached along the elongated arrangement in the core component surface and with the end of the core component and bean column node.
  3. 3. the concrete filled steel tube new type of component of steel tube confinement according to claim 1, it is characterised in that:The inner layer material Prepare material as the one or more in high performance concrete, high-strength concrete, normal concrete and regeneration concrete.
  4. 4. the concrete filled steel tube new type of component of steel tube confinement according to claim 1, it is characterised in that:The core component Manufacture material with the outer layer assembly is one kind in carbon steel, stainless steel and high-strength steel.
CN201720235556.8U 2017-03-10 2017-03-10 A kind of concrete filled steel tube new type of component of steel tube confinement Active CN206681263U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108842965A (en) * 2018-07-04 2018-11-20 什邡泰锐钢结构工程有限公司 Shake lower three-dimensional multistage yielding in pole stops building not reversed structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108842965A (en) * 2018-07-04 2018-11-20 什邡泰锐钢结构工程有限公司 Shake lower three-dimensional multistage yielding in pole stops building not reversed structure
CN108842965B (en) * 2018-07-04 2020-04-14 什邡泰锐钢结构工程有限公司 Three-dimensional multi-order yielding blocking building non-falling structure under extreme earthquake

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