CN104234316A - Steel-tube square reinforced concrete member and preparation method thereof - Google Patents

Steel-tube square reinforced concrete member and preparation method thereof Download PDF

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Publication number
CN104234316A
CN104234316A CN201410459442.2A CN201410459442A CN104234316A CN 104234316 A CN104234316 A CN 104234316A CN 201410459442 A CN201410459442 A CN 201410459442A CN 104234316 A CN104234316 A CN 104234316A
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CN
China
Prior art keywords
square
steel pipe
reinforced concrete
steel
concrete member
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Pending
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CN201410459442.2A
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Chinese (zh)
Inventor
查晓雄
王维肖
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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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Priority to CN201410459442.2A priority Critical patent/CN104234316A/en
Publication of CN104234316A publication Critical patent/CN104234316A/en
Pending legal-status Critical Current

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Abstract

The invention provides a steel-tube square reinforced concrete member. The steel-tube square reinforced concrete member comprises a steel tube, concrete and internal reinforcements, wherein the internal reinforcements are surrounded by the concrete and arranged inside the steel tube, and include a square stirrup and longitudinal bars; the longitudinal bars are arranged along the square stirrup. The steel-tube square reinforced concrete member has the advantages that the section of the member or the thickness of the steel tube is reduced, the construction speed is increased and the fire-resistant performance of the member is good; the steel-tube square reinforced concrete member can be widely applied to civil architecture structure engineering including various high-rise structures, high-rise or ultrahigh-rise buildings, industrial factory buildings, support pillars of ocean platform structures or elevated railway bridges or highway bridges.

Description

Square reinforced concrete member of steel pipe and preparation method thereof
Technical field
The invention belongs to industry and Civil structure engineering concrete filled steel tube technical field, particularly square reinforced concrete member of steel pipe and its preparation method and application.
Background technology
The industry and the Civil structure engineering concrete filled steel tube technology that have now had maturation comprise steel pipe plain concrete columns and circular arrangement of reinforcement steel core concrete column.Wherein, steel pipe plain concrete columns: concreting in steel pipe and the composite material formed; Circular arrangement of reinforcement steel core concrete column; Add in concrete filled steel tube and join circular reinforcing cage and the component formed, performance is better than steel pipe plain concrete.
Along with high-rise and large-span structure are widely used, the mixed native load of steel pipe element is increasing, and scantling is also increasing, causes the reinforcement of concrete quantitative change large, causes the waste of this non-renewable resources of concrete; And steel pipe is thickening, when the diameter of post can reach 2 to 3 meters, steel pipe not easily welds; During fire, the bearing capacity of steel pipe own is lost, and lose on the other hand, therefore fire resistance is bad to the constraint of core concrete.
And the stress performance of concrete filled steel tubular member under normal temperature high temperature of joining circular reinforcing bar is all better than steel pipe plain concrete, on the one hand the configuration of vertical internal rod can reduce the section area of steel pipe, also can not come off on the other hand by the concrete of deactivating of steel pipe after fire.But circular stirrups is difficult to processing at building-site, and calculate and design complexity, the raising and the speed of application that therefore cause cost are slack-off.
To sum up mainly there is following problem and defect in existing concrete filled steel tubular member:
A large amount of large across in, towering, heavily loaded engineering structures, must strengthen steel tube section area, cause steel pipe thickness too large, welding quality can not be guaranteed, otherwise bearing capacity is inadequate.
Can improve the blocked up problem of steel pipe after arrangement of reinforcement, although circular reinforcement manner stress performance is good, circular stirrups is difficult to processing, and computational methods are also very complicated.
Summary of the invention
For the deficiency of concrete filled steel tubular member in Super High and large span architecture, in order to ensure safety, the convenience of engineering structures, lifting construction speed simultaneously, the special proposition square reinforced concrete member of a kind of novel steel pipe and application form thereof, with adapt to modern project structure to large across, towering, heavy duty development needs, meet the industrial requirement of Modern Construction Technology, there is good development prospect.Along with research work deeply and perfect, its range of application will constantly expand.
The present invention is implemented by the following technical programs, comprises particularly:
The square reinforced concrete member of a kind of steel pipe, comprise steel pipe 1, concrete 2 and inner reinforcing bar, wherein inner reinforcing bar is surrounded by concrete, and is placed in steel duct, and described inner reinforcing bar comprises square stirrup 3 and vertical muscle 4, and vertical muscle configures along square stirrup.
Described square stirrup is square, and its length of side range of choice is determined according to actual service condition.
Described vertical muscle is connected same ordinary reinforced concrete structure with square stirrup, and be colligation or welding, it arranges number and determines according to actual service condition.
Same ordinary reinforced concrete structure on the Material selec-tion of described square stirrup and vertical muscle, intensity is determined according to actual service condition.
Described square stirrup and steel pipe need concentric to arrange.
This structure described is compared with circular stirrups, and in building-site conveniently processing, and calculate and design multiple easy, therefore cost reduction and speed of application accelerate.
Described square stirrup inside is concrete.
With common steel tube concrete on described steel pipe and concrete Material selec-tion, determine according to actual service condition.
The sectional dimension scope of described whole steel pipe square bar reinforced concrete, longitudinal length requirement, its mechanical property of bearing, with common steel tube concrete, is determined according to actual service condition.
The square reinforced concrete member of described steel pipe reduces member section or steel pipe thickness, and improve speed of application, fire resistance is good.
Concrete filled steel tubular member of the present invention can be widely used in Civil structure engineering, includes but not limited to: high-rise or super highrise building (post and stake); Overhead railway bridge or road bridge (post and braced-rib arch); Tall and slender structure (post and stake); Industrial premises (post); The stent strut (post) of offshore platform structure.
The present invention is better than steel pipe plain concrete by its static performance of the concrete filled steel tube after configuration reinforcement, ductility, and stirrup is square, and process velocity is fast, effectively can improve speed of application.The concrete filled steel tubular member of formula shape reinforcing bar can be equivalent to the steel core concrete column of configuration side's stirrup and superposing of vertical muscle, considers that steel pipe and stirrup are to the multiple confined effect of core concrete.Although stress performance is unlike circular reinforcement manner, also can meet force request, compensate for the shortcoming that circular stirrups is not easily processed.
In sum, although though to be slightly inferior to circular stirrups good for the concrete filled steel tubular member of formula shape reinforcing bar stressed, building requirements can be met completely, significant effective can reduce steel pipe thickness, improve speed of application.
The present invention comprises relative to the beneficial effect of prior art:
(1) member section or steel pipe thickness is reduced: this section form is not while affecting its service behaviour, sectional dimension of members can be reduced well, alleviate deadweight, by reducing the thickness of steel pipe, thus raising welding quality, reduce welding difficulty, and the adverse effect that reduction thick walled steel tube Stress non-homogeneity produces element bearing capacity.
(2) speed of application is improved: square stirrup is common and easily process, and so greatly improves speed of application, reduces costs.
(3) fire resistance is good: when fiery residence occurs structure, and steel pipe does not still peel off due to the concrete that exists of vertical muscle after deactivating, and improves fire resistance.
Accompanying drawing explanation
Fig. 1: steel pipe square bar reinforced concrete member section figure of the present invention, in figure, 1-steel pipe; 2-concrete; 3-square stirrup; 4-indulges muscle.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the invention will be further described:
The square reinforced concrete member of embodiment 1 steel pipe
As shown in Figure 1, the square reinforced concrete member of a kind of steel pipe, comprises steel pipe 2, concrete 2 and inner reinforcing bar, wherein inner reinforcing bar is surrounded by concrete, and it is inner to be placed in steel pipe 1, described inner reinforcing bar comprises square stirrup 2 and vertical muscle 3, and vertical muscle configures along square stirrup.
Sectional dimension 800mm × 4mm × the 1500mm of whole steel pipe square bar reinforced concrete, square stirrup is of a size of 300mm × 300mm, and vertical muscle diameter is 8mm, one is arranged every 100mm along square stirrup, vertical 3, the every limit of muscle is evenly placed, and totally 8, is connected with square stirrup colligation.
The bearing capacity of described square bar muscle encased structures is higher than plain concrete filled steel tube, but lower than circular steel tube concrete structure.
The square reinforced concrete member of embodiment 2 steel pipe
The square reinforced concrete member of a kind of steel pipe, comprise steel pipe 2, concrete 2 and inner reinforcing bar, wherein inner reinforcing bar is surrounded by concrete, and it is inner to be placed in steel pipe 1, and described inner reinforcing bar comprises square stirrup 2 and vertical muscle 3, and vertical muscle configures along square stirrup.
According to the scheme of embodiment 1, the sectional dimension of whole steel pipe square bar reinforced concrete, the size of square stirrup, vertical muscle diameter, number and position are set, are connected with square stirrup colligation and can determine, in the enterprising Row sum-equal matrix of the scheme of embodiment 1 and optimization according to actual service condition.
The bearing capacity of described square bar muscle encased structures is higher than plain concrete filled steel tube, but lower than circular steel tube concrete structure.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.

Claims (8)

1. the square reinforced concrete member of steel pipe, it is characterized in that, comprise steel pipe (1), concrete (2) and inner reinforcing bar, wherein inner reinforcing bar is surrounded by concrete, and be placed in steel duct, described inner reinforcing bar comprises square stirrup (3) and vertical muscle (4), and vertical muscle configures along square stirrup.
2. the square reinforced concrete member of steel pipe according to claim 1, is characterized in that, described square stirrup is square.
3. the square reinforced concrete member of steel pipe according to claim 1, is characterized in that, described vertical muscle is connected with square stirrup for colligation or welding.
4. the square reinforced concrete member of steel pipe according to claim 1, it is characterized in that, described square stirrup inside is concrete.
5. the square reinforced concrete member of steel pipe according to claim 1, is characterized in that, described square stirrup and steel pipe concentric are arranged.
6. the square reinforced concrete member of steel pipe according to claim 1, it is characterized in that, described square stirrup is of a size of 300mm × 300mm, and vertical muscle diameter is 8mm, arranges one along square stirrup every 100mm, and vertical 3, the every limit of muscle is evenly placed, totally 8.
7. a building, is characterized in that, described building contains the square reinforced concrete member of steel pipe described in the arbitrary claim of claim 1-6.
8. build according to claim 7, it is characterized in that, described building comprises tall and slender structure; High level or super highrise building; Industrial premises; The stent strut of offshore platform structure; Or overhead railway bridge or road bridge.
CN201410459442.2A 2014-09-10 2014-09-10 Steel-tube square reinforced concrete member and preparation method thereof Pending CN104234316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410459442.2A CN104234316A (en) 2014-09-10 2014-09-10 Steel-tube square reinforced concrete member and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410459442.2A CN104234316A (en) 2014-09-10 2014-09-10 Steel-tube square reinforced concrete member and preparation method thereof

Publications (1)

Publication Number Publication Date
CN104234316A true CN104234316A (en) 2014-12-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106087926A (en) * 2016-06-03 2016-11-09 河海大学 Ocean platform steel pipe GFRP pipe concrete mixing spud leg
WO2018023914A1 (en) * 2016-08-01 2018-02-08 江苏极易新材料有限公司 Iron structure embedded in vertical post in plant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5876640A (en) * 1981-10-28 1983-05-09 Kumagai Gumi Co Ltd Structure of reinforced concrete pillar
CN101487333A (en) * 2009-02-13 2009-07-22 江苏南通二建集团有限公司 Recycled concrete superposed column and its implementing method
CN201635257U (en) * 2009-12-23 2010-11-17 崔正龙 Member utilizing regeneration aggregate concrete
CN102392541A (en) * 2011-11-15 2012-03-28 安徽工业大学 Method for reinforcing concrete column by utilizing PVC-FRP (Poly Vinyl Chloride-Fiberglass Reinforced Plastic) pipe
CN103206042A (en) * 2013-03-18 2013-07-17 广西大学 PVC (polyvinyl chloride) pipe constrained and rectangular stirrup hooped reinforced concrete combined column

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5876640A (en) * 1981-10-28 1983-05-09 Kumagai Gumi Co Ltd Structure of reinforced concrete pillar
CN101487333A (en) * 2009-02-13 2009-07-22 江苏南通二建集团有限公司 Recycled concrete superposed column and its implementing method
CN201635257U (en) * 2009-12-23 2010-11-17 崔正龙 Member utilizing regeneration aggregate concrete
CN102392541A (en) * 2011-11-15 2012-03-28 安徽工业大学 Method for reinforcing concrete column by utilizing PVC-FRP (Poly Vinyl Chloride-Fiberglass Reinforced Plastic) pipe
CN103206042A (en) * 2013-03-18 2013-07-17 广西大学 PVC (polyvinyl chloride) pipe constrained and rectangular stirrup hooped reinforced concrete combined column

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106087926A (en) * 2016-06-03 2016-11-09 河海大学 Ocean platform steel pipe GFRP pipe concrete mixing spud leg
CN106087926B (en) * 2016-06-03 2018-05-11 河海大学 Ocean platform steel pipe-GFRP pipe concrete mixing spud legs
WO2018023914A1 (en) * 2016-08-01 2018-02-08 江苏极易新材料有限公司 Iron structure embedded in vertical post in plant

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Application publication date: 20141224

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