CN103924682A - Circular concrete-filled steel tubular column node of unbonded pre-stressing connecting concrete beam - Google Patents
Circular concrete-filled steel tubular column node of unbonded pre-stressing connecting concrete beam Download PDFInfo
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- CN103924682A CN103924682A CN201410151344.2A CN201410151344A CN103924682A CN 103924682 A CN103924682 A CN 103924682A CN 201410151344 A CN201410151344 A CN 201410151344A CN 103924682 A CN103924682 A CN 103924682A
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Abstract
The invention relates to a circular concrete-filled steel tubular column node of an unbonded pre-stressing connecting concrete beam, and belongs to the technical field of building structures. The circular concrete-filled steel tubular column node comprises a circular concrete-filled steel tubular column, a reinforced concrete beam, unbonded pre-stressing tendons, an annular plate and channel steel. The circular concrete-filled steel tubular column and the reinforced concrete beam are both formed in a cast-in-situ mode and connected through the unbonded pre-stressing tendons; a hole way is reserved in the connecting position of the circular concrete-filled steel tubular column and the reinforced concrete beam, and a metal corrugated pipe is embedded in the hole way; the annular plate is welded to the connecting position of the circular concrete-filled steel tubular column and the reinforced concrete beam, and a corresponding hole is formed in the annular plate; the channel steel is welded to a circular steel tube. By means of the circular concrete-filled steel tubular column node, the site welding technology is not needed, the reliability of node connection can be guaranteed, the node has the good shock resistance, the node connecting mode can be used for side column nodes in the structure and can also be used for middle column nodes, and the application prospect is wide.
Description
Technical field
The present invention relates to prestressing without bondn and connect concrete beam concrete-filled circular steel tube column node, belong to building structure technology field.
Background technology
In construction work, apply the concrete filled steel tube history of existing more than 100 year.The attention that bearing capacity is high owing to having for concrete filled steel tube, plasticity and the advantage such as good toughness, good economical benefit and easy construction are subject to engineering circles.Concrete filled steel tube can adapt to modern project structure to greatly across, towering, heavy duty development with bear the needs of mal-condition, meet the industrial requirement of Modern Construction Technology, thereby be just more and more widely used in individual layer and multi storied industrial factory building post, equipment frame post, pier, stake, space structures, commercial square, multistory office and house, high level and super highrise building and bridge construction, obtain good economic effect and architectural effect.Especially in recent years, undergoing an unusual development rapidly of China's concrete filled steel tube structure, also more and more to the research of concrete filled steel tube structure.
The connected node of concrete-filled circular steel tube column and beam is one of key issue while carrying out concrete filled steel tube engineering design, the validity of its connected node directly affects integrally-built rigidity, stability and supporting capacity, also has influence on site operation difficulty and construction speed.Existing concrete filled steel tube joint form is various, complex structure mostly, and difficulty of construction is large, and power transmission is indefinite, and node computation model is indefinite, and China does not also have a set of more complete node theory of computation and method for designing so far.Therefore, research and develop a kind of novel, connect safe and reliable concrete-filled circular steel tube column and girder connection form, seem very necessary.
Unbonded prestressing tendon is the special presstressed reinforcing steel with anticorrosion separation layer and oversheath, and it has easy construction, low for equipment requirements, loss of prestress is little, resistance to corrosion is strong, antifatigue and the advantage such as anti-seismic performance is good.In operational phase, presstressed reinforcing steel, in elastic state, makes structure have very strong automatic recovery ability, and permanent set is little, has good anti-seismic performance.Therefore be widely used in building structure.
Summary of the invention
The object of the present invention is to provide a kind of prestressing without bondn to connect concrete beam concrete-filled circular steel tube column node, ensureing under the prerequisite that node connects effectively, power transmission is clear and definite, by improving reinforced concrete beam and concrete-filled circular steel tube column node connected mode, adopt unbonded prestressing tendon to assemble, reduce difficulty of construction, accelerated construction speed.The present invention does not need On-site Welding Technology, and can ensure the reliability that node connects, and has good anti-seismic performance, and this node connected mode both can, for the side column node in structure, also can, for king post joint, have a extensive future.
For achieving the above object, the technical solution used in the present invention is that prestressing without bondn connects concrete beam concrete-filled circular steel tube column node, as shown in Figure 1, 2, this node comprises concrete-filled circular steel tube column (1) and reinforced concrete beam (2), and the two forms entirety by unbonded prestressing tendon (3); Concrete-filled circular steel tube column (1) is cast-in-place with reinforced concrete beam (2); Concrete-filled circular steel tube column adopts unbonded prestressing tendon to be connected with reinforced concrete beam (2); Concrete-filled circular steel tube column (1) leaves duct, built-in metal bellows (4) in duct with reinforced concrete beam (2) junction; Concrete filled steel tube and beam junction are welded with ring flat-plate (5), and ring flat-plate has corresponding hole on (5); Channel-section steel (6) is welded in round steel pipe.
Described ring flat-plate (5) is general steel plate, and width is beam section height, and thickness is thickness of steel pipe.
Described channel-section steel (6) web height is beam section width, and flange width is beam section height, and channel-section steel length is beam section height, and the web of channel-section steel cuts into the radian identical with round steel pipe, so that welding when contacts completely with round steel pipe.
The design principles of the prestressing force size of unbonded prestressing tendon (3) is: should ensure the friction shear resisting ability of junction, make again the stress in presstressed reinforcing steel remain in yield limit.
Bearing plate in the time that the end of side column ring flat-plate can be used as no-cohesive prestressed reinforcement (3) stretch-draw.
Compared with prior art, the present invention has following beneficial effect.
Adopt this node site operation speed fast, and can ensure the reliability that node connects.This node adopts ring flat-plate, the weakening effect to bearing capacity can alleviate round steel pipe and punch time; Adopt channel-section steel can increase the shear-carrying capacity of bean column node; Adopt no-cohesive prestressed reinforcement, loss of prestress is little, anti-fatigue performance is good, presstressed reinforcing steel is in elastic state, make structure have very strong automatic recovery ability, permanent set is little, has good anti-seismic performance, this brings huge economic benefit to economy and the social development of China, has a extensive future.
Brief description of the drawings
Fig. 1 is middle node front elevation view
Fig. 2 is mid-side node front elevation view
Fig. 3 is the sectional view of Fig. 1 along A-A
Fig. 4 is the sectional view of Fig. 2 along B-B
Fig. 5 is the sectional view of Fig. 2 along C-C
Fig. 6 is the sectional view of Fig. 1 along D-D
In figure, 1, concrete-filled circular steel tube column, 2, reinforced concrete beam, 3, unbonded prestressing tendon, 4, metal bellows, 5, ring flat-plate, 6, channel-section steel.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Fig. 1-6.
Embodiment 1
Prestressing without bondn connects concrete beam concrete-filled circular steel tube column joint structure as shown in Figure 1:
1, concrete filled steel tube location
The steel pipe of steel core concrete column (1) carries out perforate processing in strict accordance with drawing in steel work processing factory; At the upper tie-beam of concrete-filled circular steel tube column (1), place adopts weld all around mode to weld ring flat-plate (5) and channel-section steel (6); Steel core concrete column (1) lifting location.
2, colligation beam reinforcement cages and prestressed reinforcement are fixed
Install beam bottom mother plate, in strict accordance with design drawing colligation beam reinforcement cages; Install side form on one side, metal bellows position line is marked in the presstressed reinforcing steel position providing by drawing on side form, has welded successively bellows fixed support on beam stirrup, lays metal bellows (4).
3, unbonded prestressing tendon lashing
After bellows fixes, install anchor plate in anchored end, by presstressed reinforcing steel from smooth-going the penetrating in bellows of anchored end.Stretching end spills 0.8m, and mouth of pipe cement bag paper jam-pack prevents that cement paste and curing water from flowing into, and the partial prestressing reinforcing bar gummed paper that leaks outside wraps and prevents moisture corrosion presstressed reinforcing steel.
4, concreting
Build concrete-filled circular steel tube column and reinforced concrete beam." concrete engineering construction technological standards " is shown in concreting method.
5, tension of prestressed tendon
Concrete strength reach design strength 85% after carry out the stretch-draw of presstressed reinforcing steel, stretch-draw adopts symmetrical stretching mode, stretch-draw line of action of force overlaps with duct center line.Stretch-draw control adopts stress and stretch value dual control, and stressing sequence is 0 → 10% σ
con→ 100% σ
con→ 103% σ
con→ anchoring.
6, cutting
After stretch-draw finishes, adopt portable grinder cutting machine will expose presstressed reinforcing steel excision, its protruded length should not be less than 1.5 times of presstressed reinforcing steel diameter, and is not less than 30mm.
Embodiment 2
When for side column node, see Fig. 2, other measure, with embodiment 1, just in the end of side column, is welded on ring flat-plate (5) by unbonded prestressing tendon upper, bearing plate when this ring flat-plate can be used as unbonded prestressing tendon stretch-draw.
Claims (4)
1. prestressing without bondn connects a concrete beam concrete-filled circular steel tube column node, it is characterized in that: this node comprises concrete-filled circular steel tube column (1), reinforced concrete beam (2), presstressed reinforcing steel (3), ring flat-plate (5) and channel-section steel (6); Concrete-filled circular steel tube column (1) is cast-in-place with reinforced concrete beam (2); Concrete-filled circular steel tube column adopts unbonded prestressing tendon to be connected with reinforced concrete beam (2); Concrete-filled circular steel tube column (1) leaves duct, built-in metal bellows (4) in duct with reinforced concrete beam (2) junction; Concrete filled steel tube and beam junction are welded with ring flat-plate (5), and ring flat-plate has corresponding hole on (5); Channel-section steel (6) is welded in round steel pipe.
2. prestressing without bondn according to claim 1 connects concrete beam concrete-filled circular steel tube column node, it is characterized in that: steel core concrete column (1) and reinforced concrete beam (2) are for cast-in-place, and what presstressed reinforcing steel (3) adopted is unbonded prestressing tendon.
3. prestressing without bondn according to claim 1 connects concrete beam concrete-filled circular steel tube column node, it is characterized in that: ring flat-plate (5) is general steel plate, and width is beam section height, and thickness is thickness of steel pipe.
4. prestressing without bondn according to claim 1 connects concrete beam concrete-filled circular steel tube column node, it is characterized in that: channel-section steel (6) web height is beam section width, flange width is beam section height, channel-section steel length is beam section height, the web of channel-section steel cuts into the radian identical with round steel pipe, so that welding when contacts completely with round steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410151344.2A CN103924682A (en) | 2014-04-14 | 2014-04-14 | Circular concrete-filled steel tubular column node of unbonded pre-stressing connecting concrete beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410151344.2A CN103924682A (en) | 2014-04-14 | 2014-04-14 | Circular concrete-filled steel tubular column node of unbonded pre-stressing connecting concrete beam |
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| Publication Number | Publication Date |
|---|---|
| CN103924682A true CN103924682A (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410151344.2A Pending CN103924682A (en) | 2014-04-14 | 2014-04-14 | Circular concrete-filled steel tubular column node of unbonded pre-stressing connecting concrete beam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836490A (en) * | 2017-03-09 | 2017-06-13 | 武汉大学 | A kind of prestressing force assembled high-performance concrete-filled steel square tubular column concrete girder connection and its construction method |
| CN106968332A (en) * | 2017-03-09 | 2017-07-21 | 武汉大学 | A kind of prestressing force assembled high-performance concrete-filled circular steel tube column concrete girder connection and its construction method |
| CN113605540A (en) * | 2021-06-30 | 2021-11-05 | 江苏晟功建设集团有限公司 | Assembled steel-concrete structure column-beam unbonded prestressed node structure and construction method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3268252A (en) * | 1963-01-23 | 1966-08-23 | Robert C Rolland | Frame structure having improved joint means |
| CN2436578Y (en) * | 2000-06-16 | 2001-06-27 | 王关根 | Universal joint device for steel structure building |
| CN2797476Y (en) * | 2005-04-22 | 2006-07-19 | 北京工业大学 | Mixed jointing node of assembled concrete frame structure beam column |
| CN101769011A (en) * | 2010-03-09 | 2010-07-07 | 河海大学 | Circular steel tube concrete column and beam node connecting structure |
| CN101798849A (en) * | 2010-03-26 | 2010-08-11 | 东南大学 | Node connection device for self-centering prestressed concrete frame |
| CN103132602A (en) * | 2013-02-27 | 2013-06-05 | 同济大学 | Self-resetting frame joint |
-
2014
- 2014-04-14 CN CN201410151344.2A patent/CN103924682A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3268252A (en) * | 1963-01-23 | 1966-08-23 | Robert C Rolland | Frame structure having improved joint means |
| CN2436578Y (en) * | 2000-06-16 | 2001-06-27 | 王关根 | Universal joint device for steel structure building |
| CN2797476Y (en) * | 2005-04-22 | 2006-07-19 | 北京工业大学 | Mixed jointing node of assembled concrete frame structure beam column |
| CN101769011A (en) * | 2010-03-09 | 2010-07-07 | 河海大学 | Circular steel tube concrete column and beam node connecting structure |
| CN101798849A (en) * | 2010-03-26 | 2010-08-11 | 东南大学 | Node connection device for self-centering prestressed concrete frame |
| CN103132602A (en) * | 2013-02-27 | 2013-06-05 | 同济大学 | Self-resetting frame joint |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836490A (en) * | 2017-03-09 | 2017-06-13 | 武汉大学 | A kind of prestressing force assembled high-performance concrete-filled steel square tubular column concrete girder connection and its construction method |
| CN106968332A (en) * | 2017-03-09 | 2017-07-21 | 武汉大学 | A kind of prestressing force assembled high-performance concrete-filled circular steel tube column concrete girder connection and its construction method |
| CN113605540A (en) * | 2021-06-30 | 2021-11-05 | 江苏晟功建设集团有限公司 | Assembled steel-concrete structure column-beam unbonded prestressed node structure and construction method |
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Application publication date: 20140716 |