CN203412195U - Concrete filled steel tube complete combination column - Google Patents
Concrete filled steel tube complete combination column Download PDFInfo
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- CN203412195U CN203412195U CN201320437143.XU CN201320437143U CN203412195U CN 203412195 U CN203412195 U CN 203412195U CN 201320437143 U CN201320437143 U CN 201320437143U CN 203412195 U CN203412195 U CN 203412195U
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- steel tube
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Abstract
The utility model relates to a combination beam in the civil engineering, and discloses a concrete filled steel tube complete combination column. The concrete filled steel tube complete combination column comprises one or more steel tubes, and concrete in the steel tubes, wherein the concrete is pre-loaded concrete; a sealing end plate is arranged at one end of each steel tube; a bearing fixed end plate is arranged at the other end of each steel tube (1); the steel tubes (1) or the ends of the steel tubes are provided with holes for draining water or air. As the concrete shrinks and creeps, and the steel tubes are elastically deformed, gaps are reserved between the concrete and the steel tubes, and the steel tubes cannot fully exert effects in the original phase of the load effect; the structure solves the common fault of false combination between the steel tubes and the concrete in the combination structure, and achieves the optimal state of complete combination of the concrete filled steel tube combination structure.
Description
Technical field
The utility model relates to the compound beam in civil engineering, has related in particular to a kind of concrete filled steel tube complete combination post.
Background technology
At present, in steel tube concrete combination beam, during the interior concreting of steel pipe, after concrete setting, can shrink and creep, concrete volume reduces, thereby causes having space between steel pipe and concrete, and steel pipe cannot closely be connected with concrete, this illusion combination causes can not reaching desirable loaded state when structure stress, causes stress redistribution.When steel pipe is closely connected with concrete, the bearing capacity of its combining structure can obviously surpass the sum of steel pipe bearing capacity and bearing capacity of concrete-filled, and when there is space between steel pipe and concrete, the actual carrying capacity of its combining structure can be less than the sum of steel pipe bearing capacity and bearing capacity of concrete-filled on the contrary.Therefore, how to make tight connection the between steel pipe and concrete, improve the bearing capacity of the structure of combination, reach the effect of real 1+1 > 2, be the insoluble problem in industry always.
Summary of the invention
The utility model is in steel pipe in prior art during concreting, after concrete setting, can shrink and creep, concrete volume reduces, thereby cause having space between steel pipe and concrete, affect the shortcomings such as load performance of combining structure, a kind of prepressing type concrete of building in steel pipe is provided, steel pipe is held prepressing type concrete tightly, during precompressed, partial reaction power is applied on steel pipe, thereby reach the pre-stressed state of steel pipe tension, reach steel pipe and concrete close contact, make concrete realize real three received strength, make member at load action, be issued to the concrete filled steel tube complete combination post of interactional complete combination state.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
Concrete filled steel tube complete combination post, comprises the concrete in one or more steel pipe and steel pipe, and described concrete is prepressing type concrete, and steel pipe one end is provided with sealing end plate, and the steel pipe other end is provided with pressure-bearing fixed seal head plate.
As preferably, on described steel pipe or steel tube end part, there is the hole of draining or exhaust.
As preferably, described steel pipe inner wall surface roughness is 55-450 μ m.
As preferably, directly welding or pass through one or more the Combination Welding in Wavelike steel webplate, plain plate, shaped steel between two described above steel pipes.
As preferably, described steel pipe walls is provided with pressurization mud jacking head.
As preferably, the wall thickness in described steel pipe stage casing is greater than the wall thickness of upper-lower section.
As preferably, the diameter in described steel pipe stage casing is greater than the diameter of upper-lower section.
Concrete filled steel tube complete combination post manufacturing process, comprises following technique: steel pipe inner concrete, placement other end pressure-bearing fixed seal head plate pressurization, welding head plate are built in Coiling Welded Pipe sealing end plate, vibration, concrete is with pressure solidifies.
As preferably, when steel pipe inner concrete is built in described vibration, adopt and hang steel pipe wall vibrations or variant-frequency vibration.Above-mentioned variant-frequency vibration, comprises the following steps:
A, pour concrete into;
B, by frequency modulation, vibrate and find out more than two groups optimum frequency f1, the f2 that causes different-grain diameter aggregate resonance
C, find out f1, f2 ... corresponding best amplitude A1, A2
D, with above-mentioned f1 corresponding A 1, f2 corresponding A 2 ..., with optimum frequency f1, f2 ... fluctuate up and down in 10%, best amplitude A1, A2 ... fluctuate up and down in 10%, successively shaking concrete.
Optimum frequency f1, f2 ... because uncertainties such as being subject to concrete local material, construction environment, constructor affects, the actual optimum frequency f1 recording, f2 ... allow ± 10% fluctuation range.In like manner, best amplitude A1, A2 ... also allow ± 10% fluctuation range.
As preferably, described concrete is with pressure to be solidified, during pressurization, the cylinder shell of forcing press is connected with steel pipe, partial reaction power is applied on steel pipe, thereby reaches the pre-stressed state of steel pipe tension, reach steel pipe and concrete close contact, make concrete realize real three received strength.
As preferably, concrete is with pressure solidify initial set before or after final set, by steel pipe tube wall, be provided with pressurization mud jacking head to carrying out mud jacking in steel pipe.
The utility model is owing to having adopted above technical scheme, there is significant technique effect: due to creep and shrinkage of concrete, and there is elastic deformation in steel pipe, make to exist between the two gap, at load action starting stage steel pipe, can not play a role completely, this structure has solved in steel tube-concrete composite structure, and the common fault of steel pipe and concrete " illusion combination " has reached the optimum state of steel tube-concrete composite structure complete combination.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the structural representation of the utility model embodiment 2.
Fig. 3 is the structural representation of the utility model embodiment 3.
The toponym that in above accompanying drawing, each number designation refers to is as follows: wherein 1-steel pipe, 2-concrete.
The specific embodiment
Below in conjunction with accompanying drawing 1 to Fig. 3 and embodiment, the utility model is described in further detail:
Concrete filled steel tube complete combination post, as shown in Figure 1, comprises the concrete 2 in a steel pipe 1 and steel pipe, described concrete 2 is prepressing type concrete, steel pipe 1 one end is provided with sealing end plate, and steel pipe 1 other end is provided with pressure-bearing fixed seal head plate, has the hole of draining or exhaust on steel pipe 1 or steel tube end part.Precompressed concrete is when concreting, to adopt variant-frequency vibration, and pressurizes before initial set, makes concrete be compressive stress state, and the steel pipe of encircling is tensile stress state.The hole of draining or exhaust also can be arranged on head plate, the hole of draining or exhaust is set on steel pipe 1, water, gas that concrete in steel pipe produces in the process of solidifying can be discharged by the hole approaching with it, the concrete setting stage, the steel pipe of base closed can limit water evaporates, is conducive to concrete setting.After concrete solidifies completely, the concrete higher due to humidity is unfavorable for resistance to compression, so unnecessary moisture content evaporates from pore.
Steel pipe inner wall surface roughness is 100 μ m.By prepare the roughness of 100 μ m at steel pipe inner wall, can increase the contact area of concrete and steel pipe inner wall, reach steel pipe and concrete close contact, make member be issued to interactional complete combination state at load action, increase the adhesion stress of concrete and steel pipe simultaneously, improve the bonding strength of concrete and steel pipe.
The wall thickness in steel pipe 1 stage casing is greater than the wall thickness of upper-lower section.The structural strength that has improved middle part steel pipe 1, concrete-filled steel tubular column is when bearing ultimate load or reaching application life, and first the middle part concrete of pillar starts fragmentation often, when final pillar damages, pillar two ends still intact.Therefore, add the wall thickness in big steel pipe 1 stage casing, can effectively improve the structural strength at concrete steel tubing string middle part, extend the whole service life of pillar, improve the cost performance of pillar.
Concrete filled steel tube complete combination post manufacturing process, comprises following technique: steel pipe inner concrete, placement other end pressure-bearing fixed seal head plate pressurization, welding head plate are built in Coiling Welded Pipe sealing end plate, vibration, concrete is with pressure solidifies.
When steel pipe 1 inner concrete 2 is built in vibration, adopt and hang steel pipe 1 tube wall vibration.After the interior penetration concrete 2 of steel pipe 1, steel pipe 1 is hung and sling, then steel pipe 1 tube wall is vibrated or variant-frequency vibration, compare with traditional mode of vibration, adopt suspended vibration, more be conducive to concrete compaction, reduce the gap between concrete 2 and steel pipe 1, make concrete 2 be connected tightr with steel pipe 1.
Concrete is with pressure to be solidified, and during pressurization, the cylinder shell of forcing press is connected with steel pipe 1.Concrete is with pressure to be solidified, and during pressurization, the cylinder shell of forcing press is connected with steel pipe 1.The cylinder shell of forcing press is connected with steel pipe 1, and therefore, in the process of pressurization, steel pipe 1 is tension state, and concrete 2 is the state of pressurized, and steel pipe 1 produces relative motion with concrete 2, is more conducive to concrete compression.
Concrete is with pressure solidify initial set before or after final set, by steel pipe 1 tube wall, be provided with pressurization mud jacking head to carrying out mud jacking in steel pipe 1.By pressurization mud jacking, process, can reduce the space between steel pipe 1 and concrete 2, improve the tight ness rating that is connected of concrete and steel pipe, finally make the bearing capacity of its combining structure can be obviously over the sum of steel pipe bearing capacity and bearing capacity of concrete-filled.
Concrete adopts medium particle diameter than being the high coarse aggregate concrete of 100:41:22:10, high coarse aggregate concrete, comprise coarse aggregate, fines and cement, in described unit volume concrete, the ratio that the volume of coarse aggregate accounts for volume of concrete is 73%, the aggregate that coarse aggregate is sifted out by four kinds of above different sieve diameters forms, and sieve diameter is greater than 2.5mm.
The ratio that the volume of coarse aggregate accounts for volume of concrete is 54%～79%, pass between each sieve diameter is: a, maximum sieve diameter are D ± 5mm, b, the second sieve diameter are D/2.424 ± 3mm, c, the 3rd sieve diameter are D/4.444 ± 2mm, d, the 4th sieve diameter are D/10 ± 1mm, and D is maximum level coarse aggregate 2 benchmark particle diameters.The coarse aggregate volume that described maximum sieve aperture sifts out is concrete 71.76% ± 5%, the volume of second level coarse aggregate is concrete 4.89% ± 4%, the coarse aggregate volume of the third level is concrete 6.7% ± 3%, and the coarse aggregate volume of the fourth stage is concrete 2% ± 1.7%.
Selecting maximum sieve diameter is 40mm; The second sieve diameter is selected 16.58mm; The 3rd sieve diameter is selected 9mm; The 4th sieve diameter is selected 4.3mm, and medium particle diameter ratio is about 100:41:22:10, thereby obtains four groups of graded aggregates.Four groups of graded aggregate consumptions, account for respectively 70%, 5%, 3.7%, 0.8% of volume of concrete.According to above volume proportion, coarse aggregate accounts for concrete volume ratio and can reach more than 73%.
Select high coarse aggregate concrete, thereby reduced the cement consumption in unit volume concrete, have concrete amount of contraction little, compressive strength is high.
Concrete filled steel tube complete combination post, as shown in Figure 2, comprises the concrete 2 in two steel pipes 1 and steel pipe, described concrete 2 is prepressing type concrete, steel pipe 1 one end is provided with sealing end plate, and steel pipe 1 other end is provided with pressure-bearing fixed seal head plate, has the hole of draining or exhaust on steel pipe 1 or steel tube end part.
Steel pipe inner wall surface roughness is 200 μ m.By prepare the roughness of 200 μ m at steel pipe inner wall, can increase the contact area of concrete and steel pipe inner wall, thereby increase the adhesion stress of concrete and steel pipe, improve the bonding strength of concrete and steel pipe.
Between two steel pipes 1, be directly welded to connect.Steel pipe 1 wall is provided with pressurization mud jacking head.The diameter in steel pipe stage casing is greater than the diameter of upper-lower section.By increasing the diameter at steel pipe combining structure middle part, arrive the object of the structural strength that increases steel pipe combining structure middle part.Concrete-filled steel tubular column is when bearing ultimate load or reaching application life, and first the middle part concrete of pillar starts fragmentation often, when final pillar damages, and pillar two ends still intact.Therefore, add the wall thickness in big steel pipe 1 stage casing, can effectively improve the structural strength at concrete steel tubing string middle part, extend the whole service life of pillar, improve the cost performance of pillar.
Concrete filled steel tube complete combination post manufacturing process, comprises following technique: steel pipe inner concrete, placement other end pressure-bearing fixed seal head plate pressurization, welding head plate are built in Coiling Welded Pipe sealing end plate, vibration, concrete is with pressure solidifies.
When steel pipe 1 inner concrete 2 is built in vibration, adopt and hang steel pipe 1 tube wall variant-frequency vibration.After the interior penetration concrete 2 of steel pipe 1, steel pipe 1 is hung and sling, then steel pipe 1 tube wall is vibrated or variant-frequency vibration, compare with traditional mode of vibration, adopt suspended vibration, more be conducive to concrete compaction, reduce the gap between concrete 2 and steel pipe 1, make concrete 2 be connected tightr with steel pipe 1.Concrete is with pressure to be solidified, and during pressurization, the cylinder shell of forcing press is connected with steel pipe 1.By variant-frequency vibration machine, carry out variant-frequency vibration, in the process of variant-frequency vibration, the aggregate in concrete is because its volume is different with quality, by the variant-frequency vibration that increases gradually or reduce, make different aggregates produce successively resonance, reach layer by layer and laminate, increased concrete compactness.
Concrete is with pressure to be solidified, and during pressurization, the cylinder shell of forcing press is connected with steel pipe 1.Therefore the cylinder shell of forcing press is connected with steel pipe 1, and in the process of pressurization, steel pipe 1 has and is pulled upwardly the thin trend of drawing, and concrete 2 has the trend being pressed down, and steel pipe 1 produces relative motions with concrete 2, is more conducive to concrete compression.
Concrete is with pressure solidify initial set before or after final set, by steel pipe 1 tube wall, be provided with pressurization mud jacking head to carrying out mud jacking in steel pipe 1.Concrete is with pressure solidify initial set before or after final set, by steel pipe 1 tube wall, be provided with pressurization mud jacking head to carrying out mud jacking in steel pipe 1.By pressurization mud jacking, process, can reduce the space between steel pipe 1 and concrete 2, improve the tight ness rating that is connected of concrete and steel pipe, finally improve the overall construction intensity of steel pipe combining structure, make its bearing capacity can be obviously over the sum of steel pipe bearing capacity and bearing capacity of concrete-filled.
Embodiment 3
As shown in Figure 3, the difference of the present embodiment and embodiment 2 is, steel pipe inner wall surface roughness is 310 μ m.Between two steel pipes 1, by plain plate, weld.
Concrete filled steel tube complete combination post also can be with concrete steel pipe by three or four, by connector, is welded to form, and connector can be one or more the combination in Wavelike steel webplate, plain plate, shaped steel.
In a word, the foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (6)
1. concrete filled steel tube complete combination post, comprise the concrete (2) in one or more steel pipe (1) and steel pipe, it is characterized in that: described concrete (2) is prepressing type concrete, and steel pipe (1) one end is provided with sealing end plate, and steel pipe (1) other end is provided with pressure-bearing fixed seal head plate.
2. concrete filled steel tube complete combination post according to claim 1, is characterized in that: described steel pipe inner wall surface roughness is 55-450 μ m.
3. concrete filled steel tube complete combination post according to claim 1, is characterized in that: directly welding or by one or more the Combination Welding in Wavelike steel webplate, plain plate, shaped steel between two described above steel pipes (1).
4. concrete filled steel tube complete combination post according to claim 1, is characterized in that: described steel pipe (1) wall is provided with pressurization mud jacking head.
5. concrete filled steel tube complete combination post according to claim 1, is characterized in that: the wall thickness in described steel pipe (1) stage casing is greater than the wall thickness of upper-lower section.
6. concrete filled steel tube complete combination post according to claim 1, is characterized in that: the diameter in described steel pipe (1) stage casing is greater than the diameter of upper-lower section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201320437143.XU CN203412195U (en) | 2013-07-18 | 2013-07-18 | Concrete filled steel tube complete combination column |
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| CN201320437143.XU CN203412195U (en) | 2013-07-18 | 2013-07-18 | Concrete filled steel tube complete combination column |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240802A (en) * | 2013-05-16 | 2013-08-14 | 淮海工学院 | Production method of prestress concrete filled steel tube |
| CN103437497A (en) * | 2013-07-18 | 2013-12-11 | 杭州博数土木工程技术有限公司 | Completely-concrete-filled composite tubular steel column and making technology thereof |
| CN104612330A (en) * | 2015-01-06 | 2015-05-13 | 北京工业大学 | Embedded cap type prestressed steel pipe concrete member and secondary position control loading pressure forming method thereof |
-
2013
- 2013-07-18 CN CN201320437143.XU patent/CN203412195U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240802A (en) * | 2013-05-16 | 2013-08-14 | 淮海工学院 | Production method of prestress concrete filled steel tube |
| CN103240802B (en) * | 2013-05-16 | 2015-07-08 | 淮海工学院 | Production method of prestress concrete filled steel tube |
| CN103437497A (en) * | 2013-07-18 | 2013-12-11 | 杭州博数土木工程技术有限公司 | Completely-concrete-filled composite tubular steel column and making technology thereof |
| CN103437497B (en) * | 2013-07-18 | 2016-08-31 | 浙江中隧桥波形钢腹板有限公司 | Concrete filled steel tube complete combination post and manufacturing process |
| CN104612330A (en) * | 2015-01-06 | 2015-05-13 | 北京工业大学 | Embedded cap type prestressed steel pipe concrete member and secondary position control loading pressure forming method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140129 Termination date: 20180718 |