CN1987012A - Steel tube binding type steel high strength concrete pole - Google Patents
Steel tube binding type steel high strength concrete pole Download PDFInfo
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- CN1987012A CN1987012A CN 200610151188 CN200610151188A CN1987012A CN 1987012 A CN1987012 A CN 1987012A CN 200610151188 CN200610151188 CN 200610151188 CN 200610151188 A CN200610151188 A CN 200610151188A CN 1987012 A CN1987012 A CN 1987012A
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Abstract
A steel pipe constrained high-strength steel section-concrete column with high axial pressure ratio and high earthquake-proof and fire-proof performance is composed of several longitudinal reinforcing bars, several reinforcing hoops for fixing said longitudinal reinforcing bars, the steel sections in said reinforcing hoops, the steel pipe surrounding said reinforcing hoops and with both open ends, and concrete cast in said steel pipe.
Description
Technical field
The invention belongs to a kind of building structural element, particularly a kind of high-strength concrete column.
Background technology
High-strength concrete has advantages such as intensity height, the little and good endurance of distortion, can adapt to the modern project structure to stride greatly, heavy duty, towering development and bear the needs of severe environmental conditions, concrete high the reinforcement is the important trend of modern concrete structural development.In high-level structure, adopt the high-strength concrete frame column, can effectively reduce the pillar cross section, increase the usable floor area in house; Simultaneously, the frame column sectional dimension reduces to make that the slenderness ratio of pillar increases, and the failure mode of frame column is gradated by shear failure and is bending failure, has increased the deformability and the ductility of pillar, thereby has improved the anti-seismic performance of frame column.
Superior performance makes the range of application of high-strength concrete constantly enlarge; Abroad, strength grade of concrete has been applied to C100, is up to C130.But high-strength concrete also has its fatal weakness, and that is exactly that the ductility of high-strength concrete is very poor, is easy to generate brittle fracture, and the ductility of plain concrete significantly reduces with the raising of concrete strength.The structure of external a large amount of employing high-strength concretes all is non-seismic region, and the area of China 80% belongs to the district that provides fortification against earthquakes (more than 6 degree), particularly the concentrated city overwhelming majority of highrise building is in the district that provides fortification against earthquakes, and part is in high earthquake intensity area, should not adopt High Strength Concrete Structures." the Code for design of concrete structures GB 50010-2002 " of China regulation: when fortification intensity is 9 when spending, strength grade of concrete should not surpass C60, and when fortification intensity is 8 when spending, strength grade of concrete should not surpass C70.These prescribed limits the application of high-strength concrete in the highrise building of earthquake zone, therefore research prevents the method for high-strength concrete brittle fracture, makes full use of the advantage of high-strength concrete, has important significance for theories and practical value.
In high-strength concrete column, add shaped steel, form the anti-seismic performance that profile steel concrete column can obviously be improved high-strength concrete column; But the profile steel concrete column that adopts usually in the engineering has following shortcoming and defect at present:
1. limit value of axial compression ratio is low.Because shaped steel is positioned at the center of profile steel concrete column, so shaped steel can not produce effectively constraint to concrete; And profile steel concrete column can not be provided with compound stirrup, so the constraint that the high-strength concrete in the shaped steel high-strength concrete column is subjected to is very little, and when ratio of axial compressive force to axial compressive ultimate capacity of section was big, the ductility of pillar under Horizontal Seismic Load was very low, and the energy-dissipating property ability is little, poor seismic behavior.
2. seismic loading easily produces sag of protecting coating, vertical muscle and shaped steel edge of a wing unstability down, and the shake back is difficult repairs.Profile steel concrete column is easy to generate the phenomenon of sag of protecting coating, vertical muscle and shaped steel edge of a wing unstability under seismic loading, cause bearing capacity to reduce, and anti-seismic performance is relatively poor; After destroying, antidetonation is difficult to repair.
3. fire resistance is poor.Under fire effect, the concrete of shaped steel high-strength concrete column is subject to prevail and causes various secondary disasters; And after the sag of protecting coating, vertical muscle directly contacts with fire with stirrup, has quickened structural damage.
Summary of the invention
The profile steel concrete column limit value of axial compression ratio was low in the past in order to overcome; seismic loading easily produces sag of protecting coating, vertical muscle and shaped steel edge of a wing unstability down; the shake back is difficult repairs, and the defective of high-strength concrete column fire resistance difference the invention provides a kind of steel tube binding type steel high strength concrete pole.
The present invention is made up of vertical muscle, stirrup, concrete, steel pipe and shaped steel, vertical muscle vertical array, on the short transverse of vertical muscle, be arranged with the stirrup of the upright vertical muscle effect of frame, in stirrup, be provided with shaped steel, stirrup is arranged with steel pipe outward, built concrete in the steel pipe, steel pipe disconnects near end terminal two ends.
Core of the present invention is that the outside steel pipe of steel tube binding type steel high strength concrete pole does not bear vertical load, does not promptly bear a power and moment of flexure, only the core type steel concrete column is provided horizontal effect of contraction and bears horizontal shear.
The effect that steel tube binding type steel high strength concrete pole of the present invention brought is:
1. improve the anti-seismic performance of high-strength concrete column, high-strength concrete column can be used in the highrise building of high intensity Zone.
2. improve the limit value of axial compression ratio of profile steel concrete column, make high-strength concrete column restrictive axes pressure ratio not in application, promptly still have good seismic resistance at high axial compression ratio condition mo(u)ld bottom half steel high strength concrete pole.
3. improve the fire resistance of shaped steel high-strength concrete column, reduce secondary disaster.
4. profile steel concrete column shake back is repaired easily.
5. the topping of protection type steel high strength concrete pole prevents that high-strength concrete is subjected to fiery avalanche to produce secondary disaster.
6. solving in the shaped steel high-strength concrete column stirrup is provided with great in constructing amount, the concrete shake that cause too much and smashes problems such as difficulty and template consumption are big.
7. it is big to solve the steel pipe high strength concrete column reinforcing steel using amount, and fire resistance is poor, is connected the problem of trouble with reinforced concrete beam.
Steel tube binding type steel high strength concrete pole has following advantage with plain edition steel concrete column ratio:
1. steel tube binding type steel high strength concrete pole restrictive axes pressure ratio not.Fig. 7 is the antidetonation response curve of plain edition steel concrete column, and Fig. 8 is the antidetonation response curve of steel tube binding type steel high strength concrete pole.By finding out among the figure, steel reinforced concrete anti-seismic performance when ratio of axial compressive force to axial compressive ultimate capacity of section transfinites is very poor; And steel tube binding type steel concrete anti-seismic performance when ratio of axial compressive force to axial compressive ultimate capacity of section transfinites is still very superior.The steel using amount of steel tube binding type steel high strength concrete pole is 1.68 times of profile steel concrete column among the figure, but the bearing capacity of steel tube binding type steel high strength concrete pole is 1.94 times of profile steel concrete column, ductility is 3.08 times of profile steel concrete column, and anti-seismic performance significantly improves.Restrictive axes pressure ratio not when therefore steel tube binding type steel high strength concrete pole is used in earthquake-proof construction.
2. prevent that concrete cover peels off under the seismic loading, reinforcing bar and shaped steel unstability, easily repair the shake back.Under the seismic loading, the end concrete of profile steel concrete column is by conquassation, and reinforcing bar and shaped steel edge of a wing unstability can't be repaired after the shake; And the breakoff phenomenon of steel tube binding type steel high strength concrete pole is not obvious, and repair easily the shake back.
3. fire resistance is good.For steel tube binding type steel high strength concrete pole,, reduced secondary disaster because the existence of outside steel pipe has prevented bursting apart of topping; Simultaneously, make the temperature of vertical muscle and stirrup can sharply not raise, thereby improved the fire endurance of structure because concrete cover can avalanche.
Description of drawings
Fig. 1 is a structural representation of the present invention, Fig. 2 is the structural representation of shaped steel, Fig. 3 is the structural representation of the skeleton of the specific embodiment two, Fig. 4 is the structural representation of the specific embodiment two, Fig. 5 is the structural representation of the skeleton of the specific embodiment three, Fig. 6 is the structural representation of the specific embodiment three, and Fig. 7 is the antidetonation response curve of plain edition steel concrete column, and Fig. 8 is the antidetonation response curve of steel tube binding type steel high strength concrete pole.
The specific embodiment
The specific embodiment one: specify present embodiment below in conjunction with Fig. 1, Fig. 2 and Fig. 3, present embodiment is made up of vertical muscle 1, stirrup 2, concrete 3, steel pipe 4 and shaped steel 5, vertical muscle 1 vertical array, on the short transverse of vertical muscle 1, be arranged with the stirrup 2 of the upright vertical muscle effect of frame, in stirrup 2, be provided with shaped steel 5, be arranged with steel pipe 4 outside the stirrup 2, built concrete 3 in the steel pipe 4, steel pipe 4 disconnects near end terminal two ends.
The specific embodiment two: specify present embodiment below in conjunction with Fig. 2, steel pipe 4 is a round steel pipe in the present embodiment, and other composition and annexation are with the specific embodiment one.
The specific embodiment three: specify present embodiment below in conjunction with Fig. 3, steel pipe 4 is a square steel pipe in the present embodiment, and other composition and annexation are with the specific embodiment one.
Longitudinal stress reinforcing bar in the steel tube binding type steel high strength concrete pole of the present invention and shaped steel can dispose according to the design anti-bending bearing capacity, but steel ratio random variation in the claimed range that satisfies the relevant design standard of vertical muscle and shaped steel; Concrete should adopt the high-strength concrete of label greater than C60; Configurable longitudinal stress reinforcing bar in the steel tube binding type steel high strength concrete pole also can not dispose the longitudinal stress reinforcing bar; Shaped steel can be provided with according to the pillar requirement for bearing capacity, and the steel ratio of shaped steel should satisfy the requirement of related specifications or rules; But the shape random variation of shaped steel, can adopt hot rolled H-shaped, welded H section steel, " ten " font shaped steel, I-shaped shaped steel, other kind shaped steel and various welding compound section; Steel pipe can adopt round steel pipe, square steel pipe or other polygonal steel pipe, and the diameter of round steel pipe or the length of side of square steel pipe should be greater than 50 with the ratio of steel pipe thickness.For guaranteeing not crack in tension of steel tube end part weld seam, the hoop (round steel pipe) of sealing or the enforced steel loop of horizontal (square steel pipe) should be set during use at the steel pipe two ends.It is the steel plate of steel pipe thickness more than one times that enforced steel loop should adopt thickness; Reinforcing ring can adopt the connected mode that spot welding is connected or other is solid and reliable with steel pipe; Self joint of enforced steel loop should reliably be welded.The height of enforced steel loop should be greater than more than 5 times of steel pipe thickness.At steel tube end part the multiple tracks reinforcing ring can be set, and reinforcing ring can adopt other form, as the reinforcing bar of sealing, little angle steel etc.
The operating principle of steel tube binding type steel high strength concrete pole of the present invention is: because steel pipe disconnects in the end, two ends, therefore axle power and moment of flexure only act on the core type steel concrete column, and steel pipe is not born longitudinal force.Under axle power and moment of flexure effect, concrete compression and produce horizontal dilatancy, and outside steel pipe can limit concrete lateral expansion, therefore produce lateral pull in the steel pipe, thereby the core concrete to lateral expansion produces effectively constraint, increase concrete intensity and ductility, improved the anti-seismic performance of core concrete.Simultaneously, under Horizontal Seismic Load, pillar will be resisted horizontal shear, so outside steel pipe and core type steel concrete column are born horizontal shear jointly.Steel pipe only bears lateral pull and shearing, does not bear vertical force, and these are different with traditional concrete filled steel tube; Because the steel pipe in the concrete filled steel tube is also born vertical force, cause the lateral pull of steel pipe to reduce, not obvious to the binding effect of core concrete.
The beam of steel tube binding type steel high strength concrete pole of the present invention and reinforced concrete beam or other form of structure be connected the connected mode that adopts existing regulation and stipulation.
Claims (5)
1, steel tube binding type steel high strength concrete pole, it is characterized in that it is made up of vertical muscle (1), stirrup (2), concrete (3), steel pipe (4) and shaped steel (5), vertical muscle (1) vertical array, on the short transverse of vertical muscle (1), be arranged with the stirrup (2) of the upright vertical muscle effect of frame, in stirrup (2), be provided with shaped steel (5), stirrup (2) is outer to be arranged with steel pipe (4), has built concrete (3) in the steel pipe (4), and steel pipe (4) disconnects near end terminal two ends.
2, steel tube binding type steel high strength concrete pole according to claim 1 is characterized in that described steel pipe (4) is round steel pipe.
3, steel tube binding type steel high strength concrete pole according to claim 1 is characterized in that described steel pipe (4) is a square steel pipe.
4, steel tube binding type steel high strength concrete pole according to claim 1 is characterized in that described shaped steel (5) is H shaped steel.
5, steel tube binding type steel high strength concrete pole according to claim 1 is characterized in that described shaped steel (5) is cross-shaped profile steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610151188 CN1987012A (en) | 2006-12-22 | 2006-12-22 | Steel tube binding type steel high strength concrete pole |
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|---|---|---|---|
| CN 200610151188 CN1987012A (en) | 2006-12-22 | 2006-12-22 | Steel tube binding type steel high strength concrete pole |
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| CN1987012A true CN1987012A (en) | 2007-06-27 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818543A (en) * | 2010-05-28 | 2010-09-01 | 中南大学 | Square steel tubular column with internally tangent ring-shaped stirrup restraint and high-strength concrete |
| CN101974958A (en) * | 2010-11-24 | 2011-02-16 | 沈阳建筑大学 | Steel pipe concrete column of I-shaped FRP section |
| CN102108760A (en) * | 2011-03-02 | 2011-06-29 | 大连理工大学 | Fibre reinforced plastic-steel composite tube restrained reinforcement high-strength concrete column |
| CN102108761A (en) * | 2011-03-02 | 2011-06-29 | 大连理工大学 | Fiber reinforced plastics-steel composite pipe restricted structural steel high-strength concrete column |
| CN102619303A (en) * | 2012-04-14 | 2012-08-01 | 中南大学 | Square steel pipe high-strength concrete post restricted by internally tangent annular hoop reinforcement |
| CN103046692A (en) * | 2012-12-29 | 2013-04-17 | 华北水利水电学院 | Frame-supporting column with high strength steel bars and super high strength concrete |
| CN106836637A (en) * | 2017-01-20 | 2017-06-13 | 温州大学 | Multiple material pipe binding type steel concrete connecting-beam and its construction method |
| 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 |
| CN116005889A (en) * | 2022-12-25 | 2023-04-25 | 北京工业大学 | Stainless steel thin tube built-in function recovery steel structure recycled concrete rectangular section short column |
-
2006
- 2006-12-22 CN CN 200610151188 patent/CN1987012A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818543A (en) * | 2010-05-28 | 2010-09-01 | 中南大学 | Square steel tubular column with internally tangent ring-shaped stirrup restraint and high-strength concrete |
| CN101974958A (en) * | 2010-11-24 | 2011-02-16 | 沈阳建筑大学 | Steel pipe concrete column of I-shaped FRP section |
| CN102108760A (en) * | 2011-03-02 | 2011-06-29 | 大连理工大学 | Fibre reinforced plastic-steel composite tube restrained reinforcement high-strength concrete column |
| CN102108761A (en) * | 2011-03-02 | 2011-06-29 | 大连理工大学 | Fiber reinforced plastics-steel composite pipe restricted structural steel high-strength concrete column |
| CN102619303B (en) * | 2012-04-14 | 2015-01-14 | 中南大学 | Square steel pipe high-strength concrete post restricted by internally tangent annular hoop reinforcement |
| CN102619303A (en) * | 2012-04-14 | 2012-08-01 | 中南大学 | Square steel pipe high-strength concrete post restricted by internally tangent annular hoop reinforcement |
| CN103046692A (en) * | 2012-12-29 | 2013-04-17 | 华北水利水电学院 | Frame-supporting column with high strength steel bars and super high strength concrete |
| CN103046692B (en) * | 2012-12-29 | 2015-03-11 | 青海民族大学 | Frame-supporting column with high strength steel bars and super high strength concrete |
| CN106836637A (en) * | 2017-01-20 | 2017-06-13 | 温州大学 | Multiple material pipe binding type steel concrete connecting-beam and its construction method |
| 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 |
| CN116005889A (en) * | 2022-12-25 | 2023-04-25 | 北京工业大学 | Stainless steel thin tube built-in function recovery steel structure recycled concrete rectangular section short column |
| CN116005889B (en) * | 2022-12-25 | 2024-06-04 | 北京工业大学 | Stainless steel thin tube built-in function recovery steel structure recycled concrete rectangular section short column |
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