CN105672573A - High-strength concrete column with combined spiral hoops and square steel pipes - Google Patents
High-strength concrete column with combined spiral hoops and square steel pipes Download PDFInfo
- Publication number
- CN105672573A CN105672573A CN201610194024.4A CN201610194024A CN105672573A CN 105672573 A CN105672573 A CN 105672573A CN 201610194024 A CN201610194024 A CN 201610194024A CN 105672573 A CN105672573 A CN 105672573A
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- square steel
- spiral stirrup
- concrete
- strength concrete
- restraint
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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
Abstract
The invention discloses a high-strength concrete column with combined spiral hoops and square steel pipes, comprising square steel pipes, four spiral hoops, longitudinal bars and high-strength concrete, wherein the four spiral hoops are intersected one by one, a plurality of longitudinal bars are longitudinally banded or welded in the intersected regions and inner edges of the spiral hoops, thus forming a combined spiral hoop reinforcing cage; the combined spiral hoop reinforcing cage is arranged in the square steel pipes, and high-strength concrete is poured into the cavities of the square steel pipes. The high-strength concrete column with combined spiral hoops and square steel pipes disclosed by the invention has the advantages of simple structure, convenience in construction, good ductility, high bearing capacity and superior earthquake-resistant behavior, and is suitable for super high-rise buildings, industrial heavy-duty factory buildings and bridge piers of long-span bridges.
Description
Technical field
The invention belongs to erecting to load-bearing component of building structure, it is specifically related to join and restraints spiral stirrup high-concrete filled square steel tubular post.
Background technology
In field of civil engineering, have there is diversity development in material of construction and combination of materials form, the material wherein the most extensively adopted is steel and concrete, it is divided into main three kinds of Steel Concrete, shaped steel concrete, concrete filled steel tube by steel are different from concrete array configuration, by concrete strength, concrete is divided into normal concrete and high-strength concrete.
Join spiral stirrup Steel Concrete and belong to Steel Concrete, be mainly used in circular frame post and pile foundation. The feature of spiral stirrup Steel Concrete is: when concrete can be produced stronger lateral confinement power by spiral stirrup when pressing by post, can effectively improve concrete ductility, and the bearing capacity of pillar can be improved in certain limit, this feature of spiral stirrup Steel Concrete is similar to concrete filled steel tube. In addition, spiral stirrup Steel Reinforcement Cage has easy to make, the advantage that speed of application is fast so that it is obtain widespread use in pile foundation field. But, " Code for design of concrete structures " (GB50010-2012) give some restricted conditions to the design of the reinforced column joining spiral stirrup, long-width ratio L/D≤12 of post, and does not consider the intensity of spiral stirrup outer concrete. This is because, spiral its effect of contraction of stirrup competence exertion when pillar mainly bears axial load, and it is only to the concrete generation constraint of spiral stirrup inside.
The main cyclotomy of concrete filled steel tube, the two kinds of section forms in side. Concrete filled steel tube feature: round steel pipe is strong to the core concrete constraint of its inside, the advantage such as make that concrete filled steel tube tool bearing capacity height, ductility be good and anti-seismic performance is superior, but rounded section makes it have again the deficiencies such as unfavorable building spatial arrangement, node be complicated. Square steel pipe concrete feature: compare the concrete bearing capacity of concrete filled steel tube square steel pipe and ductility a bit weaker, but it has that building spatial arrangement is convenient, joint structure is relatively simply and more by the advantage such as owner and architect's favor. On the whole, concrete filled steel tube and square steel pipe concrete relative merits separately have complementarity. How effectively both features to be merged, learn from other's strong points to offset one's weaknesses, with the new structure forming excellent in mechanical performance, overall economic efficiency is excellent, will be a technical thought with novelty.
Comparing normal concrete, the typical feature of high-strength concrete is: intensity height, and ductility is poor, it is easy to brittle rupture occurs.The meaning of application high-strength concrete is that it can effectively reduce material of construction consumption, economizes on resources, meets Sustainable development circuit. The ductility how effectively improving high-strength concrete is one of key technical problem of high-strength concrete further genralrlization application.
At present, the scale of high-rise building, long span bridge beam constantly increases, and the size causing structural member constantly increases, and for large-section steel pipe concrete column, its inner concrete shrinks problem and becomes particularly to give prominence to.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of simple structure, easy construction, ductility are good, bearing capacity height and superior the joining and restraint spiral stirrup high-concrete filled square steel tubular post of anti-seismic performance.
The present invention solves the problems of the technologies described above with following technical scheme:
Join and restraint spiral stirrup high-concrete filled square steel tubular post, comprise square steel pipe, spiral stirrup, vertical muscle and high-strength concrete; Spiral stirrup has four, intersects between two, and longitudinal colligation or weld many vertical muscle in intersecting area and spiral stirrup inside edge, is formed and restraint spiral stirrup Steel Reinforcement Cage; And restraint spiral stirrup Steel Reinforcement Cage and be placed in square steel pipe, square steel pipe inner chamber builds high-strength concrete.
Square steel pipe is hot-roll forming, or by steel plate welding fabrication.
The cross section length of side of described square steel pipe is not less than 1000mm.
The pitch of described spiral stirrup is 50mm～200mm, and is less than 1/5th of screw diameter.
The strength grade of described high-strength concrete is not less than C50.
Substantive distinguishing features and the advantage of the present invention are:
1) compared with reinforced column, in the construction stage, external parties steel pipe can serve as template and temporary support, saves extra scaffolding and a die process, and saves corresponding executive cost.
2) compared with steel tube concrete earth pillar, serious fire is there is when unexpected, when the high temperature action in fire makes outside steel pipe lose efficacy, inner and restraint spiral stirrup and still can effectively retrain inner concrete, delay even to prevent structure from collapsing, and also facilitate the repairing and reinforcement after calamity.
3) close with common high-strength concrete join stirrup reinforced column compared with, and the most of manufacturing procedure restrainting spiral stirrup can be completed by existing machine automatization, more convenient and swift than the making of existing compound stirrup; And restraint spiral stirrup and square steel pipe to the multiple constraint effect of inner high-strength concrete, better than the binding effect of existing compound stirrup.
4) to large-section steel pipe concrete column, bundle spiral stirrup can effectively control the problem of inner concrete shrinkage and creep.
To sum up, the present invention joins and restraints spiral stirrup high-concrete filled square steel tubular post and overcome the series problems such as concrete shrinkage in the concrete filled steel tube of large section, high-strength concrete ductility are poor, Steel Concrete low bearing capacity, there is the advantage that spiral stirrup convenient formation, concrete filled steel tube saving template and high-strength concrete intensity are high, integral construction is simple, easy construction, ductility are good, bearing capacity height, and fire resistance and anti-seismic performance superior, be applicable to the bridge pier of high-rise building bottom pillar, industrial heavy factory building pillar and long span bridge beam.
Accompanying drawing explanation
Fig. 1 is that the present invention joins and restraints the structural representation of spiral stirrup high-concrete filled square steel tubular post;
Fig. 2 is the horizontal cross-sectional schematic of Fig. 1.
In figure: 1: spiral stirrup, 2: vertical muscle, 3: high-strength concrete, 4: square steel pipe.
Fig. 3 is that the present invention joins and restraints spiral stirrup high-concrete filled square steel tubular post and the mechanical performance index correlation curve figure of high-concrete filled square steel tubular post not joining reinforcing bar.In figure, A: the mechanical performance index curve not joining the high-concrete filled square steel tubular post of reinforcing bar, B curve of the present invention is joined and is restrainted the mechanical performance index curve of spiral stirrup high-concrete filled square steel tubular post.
Embodiment
Below in conjunction with drawings and Examples detail embodiments of the present invention, but not as limiting the scope of the invention.
As depicted in figs. 1 and 2, join and restraint spiral stirrup high-concrete filled square steel tubular post, comprise square steel pipe 4, spiral stirrup 1, vertical muscle 2 and high-strength concrete 3; Spiral stirrup 1 has four, intersects between two, and longitudinal colligation or weld many vertical muscle 2 in intersecting area and spiral stirrup 1 inside edge, is formed and restraint spiral stirrup Steel Reinforcement Cage; And restraint spiral stirrup Steel Reinforcement Cage and be placed in square steel pipe 4, square steel pipe 4 inner chamber builds high-strength concrete 3.
Square steel pipe 4 length of side is 2000mm, is the steel plate welding fabrication of 40mm by wall thickness, and steel strength is Q390; Spiral stirrup 1 adopts diameter to be the reinforcing bar of 16mm, and vertical muscle 2 adopts diameter to be the reinforcing bar of 30mm, and above-mentioned steel strength grade is HRB400; The pitch of spiral stirrup 1 is 100mm; The strength grade of high-strength concrete 3 is C80.
Above-mentioned joining and restraint the making method of spiral stirrup high-concrete filled square steel tubular post, step is as follows:
1) several vertical muscle 2 is welded in spiral stirrup 1 inside edge;
2) four spiral stirrups 1 are intersected between two, at the vertical muscle 2 of intersecting area welding, formed and restraint spiral stirrup Steel Reinforcement Cage;
3) and restraint spiral stirrup Steel Reinforcement Cage and be placed in square steel pipe 4 inner chamber;
5) square steel pipe 4 inner chamber builds high-strength concrete 3, is and joins and restraint spiral bar high-concrete filled square steel tubular post after maintenance is shaping.
To the present invention join and the high-concrete filled square steel tubular post restrainting spiral stirrup high-concrete filled square steel tubular post and do not join reinforcing bar has made model respectively, and carried out mechanical property test. As shown in Figure 3, when joining and restraint the spiral stirrup high-concrete filled square steel tubular post steel of 26.8% more multiplex than the high-concrete filled square steel tubular post not joining reinforcing bar, its bearing power increase 763kN, amplification is 37.1%; After A curve to peak value, load have dropped 20%, and downcomer does not occur in B curve, joins and restraints spiral stirrup high-concrete filled square steel tubular post and show better deformation performance. Thus showing, the present invention joins and restraints the bearing capacity of spiral stirrup high-concrete filled square steel tubular post and anti-seismic performance is all significantly improved.
Claims (5)
1. join and restraint spiral stirrup high-concrete filled square steel tubular post, it is characterised in that: comprise square steel pipe, spiral stirrup, vertical muscle and high-strength concrete; Spiral stirrup has four, intersects between two, and longitudinal colligation or weld many vertical muscle in intersecting area and spiral stirrup inside edge, is formed and restraint spiral stirrup Steel Reinforcement Cage; And restraint spiral stirrup Steel Reinforcement Cage and be placed in square steel pipe, square steel pipe inner chamber builds high-strength concrete.
2. according to claim 1 join and restraint spiral stirrup high-concrete filled square steel tubular post, it is characterised in that: square steel pipe is hot-roll forming, or by steel plate welding fabrication.
3. according to claim 1 join and restraint spiral stirrup high-concrete filled square steel tubular post, it is characterised in that: the cross section length of side of described square steel pipe is not less than 1000mm.
4. according to claim 1 join and restraint spiral stirrup high-concrete filled square steel tubular post, it is characterised in that: the pitch of described spiral stirrup is 50mm～200mm, and is less than 1/5th of screw diameter.
5. according to claim 1 join and restraint spiral stirrup high-concrete filled square steel tubular post, it is characterised in that: the strength grade of described high-strength concrete is not less than C50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610194024.4A CN105672573A (en) | 2016-03-30 | 2016-03-30 | High-strength concrete column with combined spiral hoops and square steel pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610194024.4A CN105672573A (en) | 2016-03-30 | 2016-03-30 | High-strength concrete column with combined spiral hoops and square steel pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105672573A true CN105672573A (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610194024.4A Pending CN105672573A (en) | 2016-03-30 | 2016-03-30 | High-strength concrete column with combined spiral hoops and square steel pipes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821043A (en) * | 2019-11-08 | 2020-02-21 | 华南理工大学 | Double-steel-grade rectangular steel pipe high-strength concrete column and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06146394A (en) * | 1992-11-11 | 1994-05-27 | Shimizu Corp | Structure of reinforced concrete column and construction method thereof |
| CN2635786Y (en) * | 2003-08-12 | 2004-08-25 | 润弘精密工程事业股份有限公司 | Screw stirrup and main reinforcing steel bar combination structure |
| EA010211B1 (en) * | 2007-05-23 | 2008-06-30 | Общество С Ограниченной Ответственностью «Научно-Технический И Экспериментально-Проектный Центр "Аркос"» | A reinforced concrete column with reinforcing steel pipes |
| CN103615071A (en) * | 2013-11-25 | 2014-03-05 | 广西大学 | Concrete-filled square steel tubular column with built-in spiral stirrup |
| CN204509978U (en) * | 2015-01-27 | 2015-07-29 | 清华大学 | Adopt the concrete structure that circle FRP constraint concrete core strengthens |
| CN205531020U (en) * | 2016-03-30 | 2016-08-31 | 广西大学 | Join in marriage and bundle wire spiral square steel tube high -strength concrete post |
-
2016
- 2016-03-30 CN CN201610194024.4A patent/CN105672573A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06146394A (en) * | 1992-11-11 | 1994-05-27 | Shimizu Corp | Structure of reinforced concrete column and construction method thereof |
| CN2635786Y (en) * | 2003-08-12 | 2004-08-25 | 润弘精密工程事业股份有限公司 | Screw stirrup and main reinforcing steel bar combination structure |
| EA010211B1 (en) * | 2007-05-23 | 2008-06-30 | Общество С Ограниченной Ответственностью «Научно-Технический И Экспериментально-Проектный Центр "Аркос"» | A reinforced concrete column with reinforcing steel pipes |
| CN103615071A (en) * | 2013-11-25 | 2014-03-05 | 广西大学 | Concrete-filled square steel tubular column with built-in spiral stirrup |
| CN204509978U (en) * | 2015-01-27 | 2015-07-29 | 清华大学 | Adopt the concrete structure that circle FRP constraint concrete core strengthens |
| CN205531020U (en) * | 2016-03-30 | 2016-08-31 | 广西大学 | Join in marriage and bundle wire spiral square steel tube high -strength concrete post |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821043A (en) * | 2019-11-08 | 2020-02-21 | 华南理工大学 | Double-steel-grade rectangular steel pipe high-strength concrete column and preparation method thereof |
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Application publication date: 20160615 |
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