CN103541508A - Irregular-section steel tube fiber concrete core column - Google Patents
Irregular-section steel tube fiber concrete core column Download PDFInfo
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- CN103541508A CN103541508A CN201310463118.3A CN201310463118A CN103541508A CN 103541508 A CN103541508 A CN 103541508A CN 201310463118 A CN201310463118 A CN 201310463118A CN 103541508 A CN103541508 A CN 103541508A
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Abstract
The invention relates to a concrete component, particularly an irregular-section steel tube fiber concrete core column in civil engineering. The section of the irregular-section steel tube fiber concrete core column is in a T, L or X shape, and the concrete contains a fiber material used as an additive. The core column satisfies the reinforcement effect and workability of steel fibers; and the length of the steel fibers is 15-60mm, the diameter or equivalent diameter is 0.3-1.2mm, and the volume doping amount of the fibers is 0.5-3%. The fiber concrete or concrete is filled in the steel tube of the irregular-section steel tube fiber concrete core column, and the fiber concrete is filled outside the steel tube. The irregular-section steel tube fiber concrete core column is a main component of a building frame structure in a high-rise building, and has the characteristics of high bearing capacity, high rigidity, light weight, favorable plasticity, favorable toughness, favorable shock resistance, favorable fatigue resistance, excellent earthquake resistance and the like.
Description
Technical field
The present invention relates to a kind of concrete component, particularly relate to a kind of odd-shaped cross section steel pipe fibrous concrete stem stem for civil engineering.
Background technology
At present, the frame column as the main member of frame construction, is generally common reinforced concrete post.But owing to cannot solving the thickness that is often greater than body of wall due to the sectional dimension of frame column, in use, the indoor pillar that there will be is partly given prominence to the phenomenon of body of wall, thereby has affected indoor space and use.
In order to address this problem, there is the form of structure of shaped rc columns.For reinforced concrete special-shape column structure, mainly contain T, L, cross, scholar both domestic and external has carried out extensive, deep research.Its theory basically forms, and writing of the local rules that the provinces and cities such as Tianjin, Shenyang, Guangdong, Shanxi have completed, and guides in engineering practice, and building area reaches number with ten million square metre.
But, also find under study for action: the ductility ratio ordinary rectangular post of shaped rc columns poor.Hetermorphiscal column is due to the existence of many limbs, and its centre of shear does not often overlap with the cross section centre of form, and under stress, each limb produces warped normal strain and shear stress.Due to shear stress, make post limb concrete occur crack prior to ordinary rectangular post, produce abdomen shear crack, cause hetermorphiscal column fragility obvious, the deformability of hetermorphiscal column is reduced than ordinary rectangular post.
In order to address this problem, many experts once proposed many suggestions and scheme.As I once applied for patent: steel pipe concrete profiled pile, special-shaped carbon fiber reinforced plastic steel tube concrete core pillar etc.Although these technology can address this problem to a certain extent, also not bery perfect, especially in high-strength concrete application, easily cause the problem in crack, the people's that caused concern.
For many years, the research of people to steel fibre confined concrete crack developing, has obtained great progress.Having proposed steel fibrous concrete cracking strength is the conclusion (fiber distance theory) being determined by the steel fibre average headway that tensile stress is played to useful effect, thereby has started the practical development phase of this advanced composite material (ACM).In recent years, steel fibre is at home and abroad developed rapidly.It has overcome the shortcomings such as concrete tensile strength is low, limit elongation is little, property is crisp, has the performances such as good tension, bending resistance, shearing resistance, resistance are split, endurance, high tenacity, and oneself is used widely at engineering fields such as building, road and bridge, water conservancy projects.
Steel fibre divides by material, has ordinary carbon steel steel fibre and stainless steel steel fibre, wherein in the majority with ordinary steel dosage of steel fiber; By profile, divide have long straight shape, impression shape, waveform, crotch shape, large capitiform, twisted shape; By cross sectional shape, divide have circle, rectangle, crescent and irregular shape; By production technology, divide have cut-off type, shearing-type, milling type and the molten type of taking out; By construction purposes, divide and build with steel fibre and injection steel fibre.For meeting enhancing effect and the workability of steel fibre, conventionally adopting length of steel fiber is 15～60mm, diameter or equivalent diameter are 0.3～1.2mm, draw ratio is 30～100, the volume volume of fiber is 0.5%～2%, generally be no more than 3%, but in present rules, also stipulate that minimum volume can arrive 0.3%.
The present invention intends utilizing the characteristic of fiber, mix in concrete, thereby it is lower to improve fragility, tension, shearing resistance and the flexural strength of concrete material self, and and steel pipe between the poor deficiency of adhesive property.
Therefore, seminar's imagination, the additive using fiber in concrete, for building, and forms odd-shaped cross section steel pipe fibrous concrete stem stem, the good method of can yet be regarded as.
Summary of the invention
The object of the invention is to be achieved through the following technical solutions: odd-shaped cross section steel pipe fibrous concrete stem stem, it is characterized in that: the section form of odd-shaped cross section steel pipe fibrous concrete stem stem is T, L, cross, contains the fibrous material that serves as additive in its concrete.
For meeting enhancing effect and the workability of steel fibre, employing length of steel fiber is 15～60mm, and diameter or equivalent diameter are 0.3～1.2mm, and the volume volume of fiber is 0.5%～2%, is generally no more than 3%;
Fiberfill fibers concrete or concrete in the steel pipe of odd-shaped cross section steel pipe fibrous concrete stem stem, and fiberfill fibers concrete outside steel pipe.
Advantage of the present invention and effect are:
1. make full use of the characteristic of fibrous material, improve the drawbacks such as fragility, tension, shearing resistance and the flexural strength of high-strength concrete be lower;
2. steel pipe is positioned at the inside of direction concrete crossover sites in length and breadth, can be fire-resistant, corrosion-resistant;
3. can first pour into a mould the fibrous concrete of steel duct, the outer fibrous concrete of surveying of rear cast steel pipe, thus form superposed column;
4. due to the existence of steel pipe, improve the ductility of post, improved the bearing capacity of post, be beneficial to earthquake zone seismic design.
Accompanying drawing explanation
Fig. 1 is that cross section is the odd-shaped cross section steel pipe fibrous concrete stem stem schematic diagram of " ten " character form structure.
Fig. 2 is that cross section is the odd-shaped cross section steel pipe fibrous concrete stem stem schematic diagram of " L " character form structure.
Fig. 3 is that cross section is the odd-shaped cross section steel pipe fibrous concrete stem stem schematic diagram of " T " character form structure.
Round steel pipe, reinforcing bar and fibrous concrete, consist of, wherein fibrous concrete is positioned at steel pipe, and steel pipe is positioned at the steel fiber concrete of direction in length and breadth.
In figure, 1 is concrete, and 2 is steel pipe, and 3 is steel fiber concrete.
The specific embodiment
Odd-shaped cross section steel pipe fibrous concrete stem stem, is characterized in that: the section form of odd-shaped cross section steel pipe fibrous concrete stem stem is T, L, cross, contains the fibrous material that serves as additive in its concrete.
For meeting enhancing effect and the workability of steel fibre, employing length of steel fiber is 15～60mm, and diameter or equivalent diameter are 0.3～1.2mm, and the volume volume of fiber is 0.5%～2%, is generally no more than 3%;
Fiberfill fibers concrete or concrete in the steel pipe of odd-shaped cross section steel pipe fibrous concrete stem stem, and fiberfill fibers concrete outside steel pipe.
1. according to standard, steel pipe is erected, and keep vertical or certain angle;
2. assembling reinforcement skeleton;
3. at reinforcing bar lateral branch masterplate;
4. according to conventional method, make concrete, and according to the steel fibre of every cubic meter of concrete 5kg～20kg, the length of steel fibre is that 6～12mm, diameter are that 0.3～1.2mm, tensile strength are more than 1200MPa, and the volume volume of fiber is 0.5%～2%, is generally no more than 3%; , make it fully to stir with concrete;
5. at the lateral branch masterplate of post, and pour into a mould coal gangue concrete.
Claims (3)
1. odd-shaped cross section steel pipe fibrous concrete stem stem, is characterized in that: the section form of odd-shaped cross section steel pipe fibrous concrete stem stem is T, L, cross, contains the fibrous material that serves as additive in its concrete.
2. according to the odd-shaped cross section steel pipe fibrous concrete stem stem described in right 1, it is characterized in that: for meeting enhancing effect and the workability of steel fibre, employing length of steel fiber is 15～60mm, and diameter or equivalent diameter are 0.3～1.2mm, and the volume volume of fiber is 0.5%～3%.
3. according to the odd-shaped cross section steel pipe fibrous concrete stem stem described in right 1, it is characterized in that: fiberfill fibers concrete or concrete in the steel pipe of odd-shaped cross section steel pipe fibrous concrete stem stem, and fiberfill fibers concrete outside steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310463118.3A CN103541508A (en) | 2013-10-08 | 2013-10-08 | Irregular-section steel tube fiber concrete core column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310463118.3A CN103541508A (en) | 2013-10-08 | 2013-10-08 | Irregular-section steel tube fiber concrete core column |
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| Publication Number | Publication Date |
|---|---|
| CN103541508A true CN103541508A (en) | 2014-01-29 |
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| CN201310463118.3A Pending CN103541508A (en) | 2013-10-08 | 2013-10-08 | Irregular-section steel tube fiber concrete core column |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100042A (en) * | 2014-06-17 | 2014-10-15 | 沈阳建筑大学 | Steel skeleton-steel pipe fiber concrete T-shaped section composite column |
| CN107143087A (en) * | 2017-04-26 | 2017-09-08 | 北京工业大学 | A kind of superposed column and preparation method thereof |
-
2013
- 2013-10-08 CN CN201310463118.3A patent/CN103541508A/en active Pending
Non-Patent Citations (4)
| Title |
|---|
| 任林林等: ""L形钢骨混凝土异形柱在爆炸荷载作用下的抗爆性能分析"", 《第十届沈阳科学学术年会论文集（信息科学与工程技术分册）》 * |
| 徐亚丰等: ""碳纤维钢骨_钢管混凝土柱抗震性能试验与有限元分析"", 《沈阳建筑大学学报（自然科学版）》 * |
| 戎贤等: ""钢纤维混凝土力学特性及其在异形柱节点中的应用"", 《混凝土》 * |
| 王傲等: ""钢管直径对T形截面钢管混凝土芯柱的抗爆性能影响研究"", 《工程力学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100042A (en) * | 2014-06-17 | 2014-10-15 | 沈阳建筑大学 | Steel skeleton-steel pipe fiber concrete T-shaped section composite column |
| CN107143087A (en) * | 2017-04-26 | 2017-09-08 | 北京工业大学 | A kind of superposed column and preparation method thereof |
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Application publication date: 20140129 |
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| RJ01 | Rejection of invention patent application after publication |