CN201292609Y - Bidirectional anchoring steel fiber - Google Patents
Bidirectional anchoring steel fiber Download PDFInfo
- Publication number
- CN201292609Y CN201292609Y CNU2008201060546U CN200820106054U CN201292609Y CN 201292609 Y CN201292609 Y CN 201292609Y CN U2008201060546 U CNU2008201060546 U CN U2008201060546U CN 200820106054 U CN200820106054 U CN 200820106054U CN 201292609 Y CN201292609 Y CN 201292609Y
- Authority
- CN
- China
- Prior art keywords
- steel fiber
- steel fibre
- steel
- spiral
- bidirectional anchoring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 81
- 239000010959 steel Substances 0.000 title claims abstract description 81
- 239000000835 fiber Substances 0.000 title claims abstract description 78
- 238000004873 anchoring Methods 0.000 title claims abstract description 22
- 230000002457 bidirectional effect Effects 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 239000004567 concrete Substances 0.000 description 10
- 230000003014 reinforcing effect Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 3
- 239000011157 advanced composite material Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 244000309464 bull Species 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to a steel fiber, in particular to a two-way anchoring steel fiber which solves the problem that the spiral steel fiber has complicated manufacture and high cost in the prior art. The steel fiber comprises a steel fiber body, wherein sidelines formed from the middle section of the steel fiber body to both ends of the steel fiber body are radial and the width of both ends of the steel fiber body is larger than that of the middle section of the steel fiber body, so an anchoring area which gradually increases from the middle to two ends is formed. The steel fiber has the advantages that the tensile strength is higher than the traditional steel fiber, and the process and the manufacture are very easy.
Description
Technical field
The utility model relates to a kind of steel fibre, is specially a kind of bidirectional anchoring shape steel fibre.
Background technology
Steel fibrous concrete is the advanced composite material (ACM) in the modern architecture material, the history in three, 40 years has at home and abroad been arranged, be widely used in all many-sides such as road surface, super highway, airfield runway, industry ground slab, bridge, tunnel, tunnel, water conservancy dam, hydraulic engineering, explosion-proof engineering, anti-penetration engineering.
In view of steel fibrous concrete is formed heterogeneous, multicomponent and non-homogeneity with structure, add " disorderly to " of steel fibre and the feature of " weak point ", it is a very complicated problem on design theory, at present still among constantly arguing, improve and developing, so in the enhancing of steel fibre, toughness reinforcing design, also lack theory and the design formulas that instructs quantitative design at present; Particularly the quality of steel fibre own is slight, and the huge characteristics of use amount have also restricted the commercial feasibility of complicated shape steel fibre greatly.At present both at home and abroad the steel fibre that uses mostly is the fairly simple steel fibre of shape, generally be turned round and look at strengthen do not turn round and look at toughness reinforcing, or the enhancing that turned round and look at toughness reinforcing Gu not, so their performance is general, application life is unsatisfactory.In order to seek better steel fibre, the spiral steel fiber utility model patent has been proposed at the end of last century, just because of the manufacturing process more complicated of spiral steel fiber, and the spiral steel fiber concrete performance of low tensile strength is general, they do not have to succeed.Utilize patent of invention (milling-rotating formation machine for spiral steel fiber) to solve the manufacturing difficult problem of spiral steel fiber earlier, the preferred more concrete performance of spiral steel fiber finds to improve tensile strength and is that the spiral steel fiber concrete strengthens simultaneously, toughness reinforcing necessary condition.On new practical basis, we sum up propose steel fibre to steel fibrous concrete strengthen, toughness reinforcing mechanism; Thereby obtained the method for designing of maximum acting type steel fibers.Simultaneously milling-rotating formation machine for spiral steel fiber has been carried out eight big improvement, made it not only can produce the spiral steel fiber of minor diameter, superelevation tensile strength, made the upper limit level of its cost of production simultaneously near general steel fibre.The concrete performance of spiral steel fiber obtains easily admitting of the relevant company of the U.S., but is not also accepted by businessman on the price.Because the productivity ratio of spiral steel fiber is subjected to the restriction of spiral forming speed, further boosting productivity and reducing cost truly has difficulty.How to design a kind of maximum acting type, its productivity ratio height, the steel fibre that cost is low become a technical problem that needs to be resolved hurrily.
Summary of the invention
The utility model for solve the spiral steel fiber that exists in the prior art make complicated, the problem that cost is high and the bidirectional anchoring shape steel fibre that provides a kind of.
The utility model is realized by following technical scheme, a kind of novel bidirectional anchoring shape steel fibre, comprise the steel fibre body, the sideline that is formed to the two ends of steel fibre body by steel fibre body interlude is radial, and the two ends width of steel fibre body is greater than the width of steel fibre body interlude.So can form the anchoring area that increases gradually to two ends formation from the centre.
With the spiral steel fiber ratio, the utility model is a kind of shaped steel fibres that can produce the bidirectional anchoring effect on total length, it effectively extract displacement near 1/2nd fibre length, so it has maximum toughened ability; It has enough anchoring areas and anchoring resistance simultaneously, and it can produce maximum adhesion strength with the cement mortar interface; It has higher enhancing ability, and this is because spiral steel fiber produces pull-out resistance at withdrawal process by the detorsion drag, and bidirectional anchoring shape steel fibre produces pull-out resistance at withdrawal process by metal plastic deformation.If the waveform steel fibre produces pull-out resistance at withdrawal process by the contraflexure drag, according to theory analysis and finite element analysis computation as can be known, roughly only need about 30% to enter plastic state, just can produce flexural deformation, we are made as the resistance of bending the words of 1 unit, spiral steel fiber produces pull-out resistance by the detorsion drag, reverse and to regard condition of equivalent thickness as, the particular curve of wideer material, roughly need about 60～70% to enter plastic state, just can produce torsional deflection, its resistance can reach 2 units, and the utility model produces pull-out resistance by metal plastic deformation, have only all to enter plastic state, it is extracted, its resistance can reach 3 units.Here it is, and why spiral steel fiber is better than general steel fibre, and bidirectional anchoring shape steel fibre more is better than the reason of spiral steel fiber.As long as the more important thing is manufacture and design that bull unwrapping wire, a breaking down are sent to, the bidirectional rolling moulding with cut off automatic machine, just can be at a high speed, continuously produce qualified bidirectional anchoring shape steel fibre.It can realize bull continuous high speed roll forming and flying shear, the productivity ratio height, easily rolling, cost is low.
Description of drawings
Fig. 1 is a stereogram of the present utility model
Fig. 2 is a vertical view of the present utility model
Fig. 3 is the lateral view of Fig. 2
Fig. 4 is the A-A sectional view of Fig. 2
The specific embodiment
As schematically shown in Figure 1, a kind of bidirectional anchoring shape steel fibre comprises the steel fibre body, and the sideline 1,2 that is formed to the two ends of steel fibre body by steel fibre body interlude is for radial, and the two ends width of steel fibre body is greater than the width of steel fibre body interlude.Sideline 1,2 can be straight line, also can be curve, for example hyperbola, parabola.
In concrete, the active force of the utility model resistance to plucking is embodied in " the anchoring area of Zeng Daing gradually " these characteristics.When concrete with when being mounted in wherein steel fibre body relative motion under external force, half of steel fibre body is for gradually leaving shape, so no matter mobile or static, can both produce with concrete all the time and resist the pulling force that relatively moves, thereby play better anchoring effect.The steel fibre of existing some two ends convex can only produce pulling force by the two ends bossing, fracture easily, and the tension effect is relatively poor relatively.
As schematically shown in Figure 2, bidirectional anchoring shape steel fibre equivalent diameter d
Dx=0.3～0.6mm; Tensile strength sigma
b=600～2800MPa; Adhesion strength f
Zj=10～20MPa; Effectively extract displacement b
Bc=(0.8～1) lmm, wherein l is a steel fibre length.
As schematically shown in Figure 3, the interlude thickness of the steel fibre body side-looking face of bidirectional anchoring shape steel fibre is greater than two-end thickness.
Claims (3)
1, a kind of bidirectional anchoring shape steel fibre, comprise the steel fibre body, it is characterized in that: the sideline (1,2) that is formed to the two ends of steel fibre body by steel fibre body interlude is for radial, and the two ends width of steel fibre body is greater than the width of steel fibre body interlude.
2, bidirectional anchoring shape steel fibre according to claim 1 is characterized in that: sideline (1,2) can be straight line or curve.
3, bidirectional anchoring shape steel fibre according to claim 1, it is characterized in that: the interlude thickness of the side-looking face of steel fibre body is greater than two-end thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201060546U CN201292609Y (en) | 2008-09-25 | 2008-09-25 | Bidirectional anchoring steel fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201060546U CN201292609Y (en) | 2008-09-25 | 2008-09-25 | Bidirectional anchoring steel fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201292609Y true CN201292609Y (en) | 2009-08-19 |
Family
ID=41006080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201060546U Expired - Fee Related CN201292609Y (en) | 2008-09-25 | 2008-09-25 | Bidirectional anchoring steel fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201292609Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102459776A (en) * | 2009-06-12 | 2012-05-16 | 贝卡尔特公司 | High elongation fibers with good anchorage |
| CN103261543A (en) * | 2010-12-15 | 2013-08-21 | 贝卡尔特公司 | Steel fibre for reinforcing concrete or mortar provided with flattened sections |
| CN107739164A (en) * | 2017-11-30 | 2018-02-27 | 中南大学 | A kind of spiral steel fibre of end anchor type and its make processing method |
-
2008
- 2008-09-25 CN CNU2008201060546U patent/CN201292609Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102459776A (en) * | 2009-06-12 | 2012-05-16 | 贝卡尔特公司 | High elongation fibers with good anchorage |
| CN102459776B (en) * | 2009-06-12 | 2016-08-10 | 贝卡尔特公司 | There is the high elongation fibre of good anchorage |
| CN103261543A (en) * | 2010-12-15 | 2013-08-21 | 贝卡尔特公司 | Steel fibre for reinforcing concrete or mortar provided with flattened sections |
| CN103261543B (en) * | 2010-12-15 | 2016-08-17 | 贝卡尔特公司 | Steel fibers with flat segments for reinforcing concrete or mortar |
| CN107739164A (en) * | 2017-11-30 | 2018-02-27 | 中南大学 | A kind of spiral steel fibre of end anchor type and its make processing method |
| CN107739164B (en) * | 2017-11-30 | 2022-12-16 | 中南大学 | End-anchored spiral steel fiber and its manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20120925 |