CN103866906B - Seif-citing rate adjustable steel pipe concrete column - Google Patents
Seif-citing rate adjustable steel pipe concrete column Download PDFInfo
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- CN103866906B CN103866906B CN201410125359.1A CN201410125359A CN103866906B CN 103866906 B CN103866906 B CN 103866906B CN 201410125359 A CN201410125359 A CN 201410125359A CN 103866906 B CN103866906 B CN 103866906B
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Abstract
The invention discloses a kind of seif-citing rate adjustable steel pipe concrete column, comprising the steel pipe of the symmetrical longitudinal slot of upper bands, is core concrete post in steel pipe; Outer surface of steel tube arranges some transverse directions of being held tightly by steel pipe and strengthens rib, link with screw bolt and nut between adjacent rib, with the sealing of high resiliency macromolecular material packing between the longitudinal slot of steel pipe, the cylinder that steel pipe top is split by the line of rabbet joint inwardly shrinks by during bolt tightening at adjacent rib, eliminates district of coming to nothing.The present invention have adjustable seif-citing rate steel tube structure simple, make simple and easy, increase with low cost; By tightening up the adjacent rib on steel cylinder, symmetrical steel cylinder cylinder can be made to curve inwardly distortion, eliminate region of coming to nothing completely, and oppress core concrete, formation seif-citing rate.
Description
Technical field
The present invention relates to the steel tube-concrete composite structure in a kind of civil engineering and bridge engineering.
Background technology
Concrete filled steel tube is a kind of combining structure concrete being poured into thin-wall steel tube and is formed.Compared with traditional reinforced concrete structure, it has, and bearing capacity is high, lightweight, plasticity good toughness, easy construction and save the plurality of advantages such as cement and mould material.This new structure just more and more comes into one's own in recent years, and at home and abroad in high building project, subway station engineering and Longspan Bridge engineering, oneself is used widely.
In encased structures, steel pipe and concrete bi-material interact in loading process, namely under steel pipe makes concrete be in three-dimensional compressing stress state to concrete effect of contraction, thus concrete intensity is improved, toughness and plasticity improve; The effect of core concrete simultaneously can be avoided or delay steel pipe and produce cripling phenomenon, thus ensures giving full play to of its material property.In addition, in the work progress of concrete filled steel tube, steel pipe directly as the template of concreting, thus greatly can accelerate construction speed.In a word, steel pipe combines with concrete not only can make up the shortcoming of bi-material, can also give full play to the advantage that both are respective, additionally improves the performance of fire prevention, antidetonation.
Concrete material in setting and harden and use procedure because the change of inside concrete moisture, chemical reaction and variations in temperature etc. cause volume to reduce-shrink.Core concrete contraction can cause the phenomenon of coming to nothing of concrete filled steel tube.For steel core concrete column, find through research, due to the consolidation effect (poisson effect) of gravity, from bottom, core concrete and the steel cylinder interface cohesion of about 2/3rds post height are closely, problem of not coming to nothing; Then there is the problem of coming to nothing in the core concrete of top about 1/3rd post height, size of coming to nothing, with highly become to be similar to proportional relation.The contraction strain of core concrete is generally the microstrain of tens to hundreds of, and diametric(al) is maximum comes to nothing size generally in millimeter magnitude.Prevent the problem of coming to nothing of concrete filled steel tube, must set about from steel pipe, this bi-material of concrete, there are three kinds of ways: one is in concrete component, add suitable expansion agent, makes concrete expansion produce seif-citing rate between steel pipe and concrete; Two is steel pipe is contracted between steel pipe and concrete produce seif-citing rate; Three is utilize the structure such as peg, reinforcing cage to limit concrete shrinkage strain, avoids coming to nothing.Some researchers are studied cement expansive material, achieve some achievements, but to concrete because the contraction inhibition of variations in temperature, hydrated cementitious generation is also undesirable; Also there is researcher to shrink steel pipe to be studied, propose first to steel pipe heating, then concreting, again to the method that steel pipe cooling is shunk after waiting hardening of concrete, but this method is difficult to practical operation.
Summary of the invention
For the problem of coming to nothing of steel pipe ubiquitous in existing Construction of Steel Pipe Concrete Column and use procedure and core concrete post, provide a kind of mechanical means that steel pipe is shunk to erase district of coming to nothing, and make to produce seif-citing rate between steel pipe and concrete.The object of the present invention is to provide a kind of novel steel core concrete column, the problem of coming to nothing that common steel core concrete column exists can be overcome.
Technical solution of the present invention is:
A kind of seif-citing rate adjustable steel pipe concrete column, is characterized in that: the steel pipe comprising the symmetrical longitudinal slot of upper bands is core concrete post in steel pipe; Outer surface of steel tube arranges some transverse directions of being held tightly by steel pipe and strengthens rib, link with screw bolt and nut between adjacent rib, with the sealing of high resiliency macromolecular material packing between the longitudinal slot of steel pipe, the cylinder that steel pipe top is split by the line of rabbet joint inwardly shrinks by during bolt tightening at adjacent rib, eliminates district of coming to nothing.
Longitudinal slot is positioned at steel pipe top 1/3rd level locations.
Laterally strengthen rib and have multilayer, laterally strengthen rib for every layer and form by many, and adjacent two junctions are positioned at longitudinal slot place.Some resistance strain gages are pasted on core concrete post surface.
Build common high-strength concrete (can not add expansion agent) according to a conventional method, wait core concrete setting and harden after three months, shrink and substantially complete, the district's volume that comes to nothing remains unchanged.Core concrete post upper surface after curing pastes some resistance strain gages, and they will be used for the concrete strain of measurement core; Tighten up the bolt link of adjacent rib at fluting place, symmetrical steel cylinder cylinder is curved inwardly distortion, and then eliminates region of coming to nothing completely, and oppress core concrete, formation seif-citing rate.The resistance strain gage being attached to concrete column upper surface for detecting the radial compressive strain of core concrete, to determine the bolt linking power of adjacent rib at fluting place.
The present invention has the following advantages:
(1) adjustable seif-citing rate steel tube structure simple, make simple and easy, increase with low cost;
(2) by tightening up the adjacent rib on steel cylinder, symmetrical steel cylinder cylinder can be made to curve inwardly distortion, eliminate region of coming to nothing completely, and oppress core concrete, formation seif-citing rate;
(3) by resistor straining testing, control the tightening force of adjacent rib, seif-citing rate between steel cylinder and core concrete can be regulated according to engineering design requirements;
(4) load mode is simple, practical and reliable, and by tightening the nut of the bolt link between adjacent rib, scene can apply seif-citing rate easily;
(5) link with bolt between adjacent rib, the local stability of steel cylinder intensity and steel cylinder cylinder is strengthened;
(6) be filled with a sealing by high resiliency macromolecule (waterproof) material in steel cylinder groove, eliminate the impact that fluting is shaped on concreting, and after applying seif-citing rate, form compressive strain, improve sealing, eliminate the source that the upper line of rabbet joint of steel cylinder in life cycle (pipe) causes corrosion.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the partial enlarged drawing of Fig. 1.
Fig. 3 uses design sketch of the present invention.
Fig. 4 does not use design sketch of the present invention.
Detailed description of the invention
A kind of seif-citing rate adjustable steel pipe concrete column, comprising the steel pipe 1 of the symmetrical longitudinal slot of upper bands, is core concrete post 2 in steel pipe; Outer surface of steel tube arranges some transverse directions of being held tightly by steel pipe and strengthens rib 3, link with screw bolt and nut 4 between adjacent rib, seal with high resiliency macromolecular material packing 5 between the longitudinal slot of steel pipe, the cylinder that steel pipe top is split by the line of rabbet joint inwardly shrinks by during bolt tightening at adjacent rib, eliminates district 6 of coming to nothing.
Longitudinal slot is positioned at steel pipe top 1/3rd level locations.
Laterally strengthen rib and have multilayer, laterally strengthen rib for every layer and form by many, and adjacent two junctions are positioned at longitudinal slot place.Some resistance strain gages are pasted on core concrete post surface.
Build common high-strength concrete (can not add expansion agent) according to a conventional method, wait core concrete setting and harden after three months, shrink and substantially complete, the district's volume that comes to nothing remains unchanged.Core concrete post upper surface after curing pastes some resistance strain gages, and they will be used for the concrete strain of measurement core; Tighten up the bolt link of adjacent rib at fluting place, symmetrical steel cylinder cylinder is curved inwardly distortion, and then eliminates region of coming to nothing completely, and oppress core concrete, formation seif-citing rate.The resistance strain gage being attached to concrete column upper surface for detecting the radial compressive strain of core concrete, to determine the bolt linking power of adjacent rib at fluting place.When tighting a bolt, the cylinder split by the line of rabbet joint can be made inwardly to shrink, parcel compressed core concrete column, forms seif-citing rate.
The cylinder of steel pipe top about 1/3rd height is split by the longitudinal slot of some symmetries, and these symmetrical cylinders can inwardly shrink, and eliminates district of coming to nothing, and tightly wraps up compressed core concrete column, forms the seif-citing rate between steel pipe and concrete column.Control the adjustable seif-citing rate of pretightning force of bolt, and improve the supporting capacity of steel core concrete column further.When tightening adjacent reinforcement rib and making cylinder inwardly shrink, slot width diminishes, and packing can bear corresponding compressive strain; Packing can water-tight in addition, improves the resistance to corrosion of steel pipe.After being linked by bolt between adjacent reinforcement rib, define several loops, globality strengthens, and improves the local stability of cylinder, and then improves stability and the integrated carrying ability of steel core concrete column.
Claims (3)
1. a seif-citing rate adjustable steel pipe concrete column, is characterized in that: the steel pipe comprising the symmetrical longitudinal slot of upper bands is core concrete post in steel pipe; Outer surface of steel tube arranges some transverse directions of being held tightly by steel pipe and strengthens rib, link with screw bolt and nut between adjacent rib, with the sealing of high resiliency macromolecular material packing between the longitudinal slot of steel pipe, the cylinder that steel pipe top is split by the line of rabbet joint inwardly shrinks by during bolt tightening at adjacent rib, eliminates district of coming to nothing; Longitudinal slot is positioned at steel pipe top 1/3rd level locations.
2. seif-citing rate adjustable steel pipe concrete column according to claim 1, is characterized in that: laterally strengthening rib has multilayer, laterally strengthen rib for every layer and form by many, and adjacent two junctions is positioned at longitudinal slot place.
3. seif-citing rate adjustable steel pipe concrete column according to claim 1 and 2, is characterized in that: paste some resistance strain gages on core concrete post surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410125359.1A CN103866906B (en) | 2014-03-31 | 2014-03-31 | Seif-citing rate adjustable steel pipe concrete column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410125359.1A CN103866906B (en) | 2014-03-31 | 2014-03-31 | Seif-citing rate adjustable steel pipe concrete column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103866906A CN103866906A (en) | 2014-06-18 |
| CN103866906B true CN103866906B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410125359.1A Expired - Fee Related CN103866906B (en) | 2014-03-31 | 2014-03-31 | Seif-citing rate adjustable steel pipe concrete column |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110029778B (en) * | 2019-04-16 | 2021-05-18 | 福建九鼎建设集团有限公司 | High strength component of intelligence building engineering |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0258625A (en) * | 1988-08-22 | 1990-02-27 | Toshiro Suzuki | Foundation pile |
| JPH05141042A (en) * | 1991-11-19 | 1993-06-08 | Kajima Corp | Steel-pipe concrete pole |
| GB2315797A (en) * | 1996-07-31 | 1998-02-11 | Corrosion Control Internationa | Vortex shedding wraps for submerged pilings and pipes |
| JP4472850B2 (en) * | 2000-10-13 | 2010-06-02 | 清水建設株式会社 | Dampers, braces and pillars |
| CN203050102U (en) * | 2012-12-31 | 2013-07-10 | 中国建筑第八工程局有限公司 | Forming wooden building round template |
-
2014
- 2014-03-31 CN CN201410125359.1A patent/CN103866906B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0258625A (en) * | 1988-08-22 | 1990-02-27 | Toshiro Suzuki | Foundation pile |
| JPH05141042A (en) * | 1991-11-19 | 1993-06-08 | Kajima Corp | Steel-pipe concrete pole |
| GB2315797A (en) * | 1996-07-31 | 1998-02-11 | Corrosion Control Internationa | Vortex shedding wraps for submerged pilings and pipes |
| JP4472850B2 (en) * | 2000-10-13 | 2010-06-02 | 清水建設株式会社 | Dampers, braces and pillars |
| CN203050102U (en) * | 2012-12-31 | 2013-07-10 | 中国建筑第八工程局有限公司 | Forming wooden building round template |
Non-Patent Citations (2)
| Title |
|---|
| 《钢板箍螺栓装配连接混凝土柱抗震性能研究》;李进等;《地震工程与工程振动》;20131031;第33卷(第5期);54-57 * |
| 《钢管混凝土拱肋混凝土脱空研究综述》;林春姣等;《中外公路》;20041219;第24卷(第6期);197-203 * |
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| CN103866906A (en) | 2014-06-18 |
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Granted publication date: 20160120 Termination date: 20180331 |