CN103938730A - Combination node for connecting concrete beam with round steel tube concrete column through unbonded prestressed ribs and ordinary steel bars - Google Patents
Combination node for connecting concrete beam with round steel tube concrete column through unbonded prestressed ribs and ordinary steel bars Download PDFInfo
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- CN103938730A CN103938730A CN201410146782.XA CN201410146782A CN103938730A CN 103938730 A CN103938730 A CN 103938730A CN 201410146782 A CN201410146782 A CN 201410146782A CN 103938730 A CN103938730 A CN 103938730A
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Abstract
The invention provides a combination node for connecting a concrete beam with a round steel tube concrete column through unbonded prestressed ribs and ordinary steel bars, and belongs to the technical field of building structures. The steel tube concrete column and the reinforced concrete beam are both cast in situ; the round steel tube concrete column and the reinforced concrete beam are connected through the unbonded prestressed ribs and the ordinary steel bars; the positions where the reinforced concrete beam is connected with the round steel tube concrete column are provided with hole channels, and metal corrugated tubes are pre-buried in the hole channels and are tensioned after the prestressed ribs are inserted; the portion, connected with the reinforced concrete beam, of the round steel tube concrete column is provided with an annular plate in a welded mode, and the annular plate is provided with corresponding holes; the channel steel is welded to a round steel tube. The construction speed is high, the onsite welding process is needless, reliability of node connection can be guaranteed, good anti-seismic performance is achieved, and application prospects are wide.
Description
Technical field
The present invention relates to prestressing without bondn and be connected concrete beam concrete-filled circular steel tube column combined joint with plain bars, 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 encased structures, also more and more to the research of encased structures.
The connected node of steel core concrete column and beam is one of key issue while carrying out concrete filled steel tube engineering design, and 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, a kind of novel on-the-spot simple and fast of installing that has of research and development, less demanding to operating personnel's technology and construction environment, connect safe and reliable steel core concrete 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 invention is to ensureing under the prerequisite that node connects effectively, power transmission is clear and definite, by improving cast-in-situ steel reinforced concrete beam and Frame Joints of Concrete-Filled Steel Tube connected mode, adopt unbonded prestressing tendon and plain bars to assemble, reduced difficulty of construction, accelerated construction speed.Speed of application of the present invention is fast, 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 is connected concrete beam concrete-filled circular steel tube column combined joint with plain bars, as shown in Figure 1, 2, this node comprises concrete-filled circular steel tube column, reinforced concrete beam, unbonded prestressing tendon, plain bars, ring flat-plate, channel-section steel; Concrete-filled circular steel tube column (1) and reinforced concrete beam (2) are cast-in-place, and the two connects by unbonded prestressing tendon (3) and plain bars (4); Upper and reinforced concrete beam (2) the junction welding ring flat-plate (5) at concrete-filled circular steel tube column (1), ring flat-plate has corresponding hole on (5); Channel-section steel (6) is welded in round steel pipe; The position of reinforced concrete beam, the corresponding beam section of concrete-filled circular steel tube column is stayed and is established duct, and near built-in metal bellows (7) in the duct of beam upper and lower surface, in metal bellows (7), wear presstressed reinforcing steel (3), tensioned prestressing bar (3), thereby by beam column composition entirety.
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 is slit into the radian identical with round steel pipe, so that welding when contacts completely with round steel pipe.
No-cohesive prestressed reinforcement (3) can provide the clamping force of beam column interface, resist the node vertical shear due to vertical load on beam and horizontal earthquake action generation by this clamping force, this clamping force also makes structure have good automatic recovery ability simultaneously, and the permanent set of structure is dwindled.
At the ring flat-plate (5) of the end of side column, the bearing plate while can be used as no-cohesive prestressed reinforcement stretch-draw, simultaneously also can after wear plain bars (4) and be welded on this ring flat-plate, after meeting, wear the anchoring requirement of reinforcing bar.
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 elevation
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
Wherein, the 1st, concrete-filled circular steel tube column, the 2nd, cast-in-situ steel reinforced concrete beam, the 3rd, unbonded prestressing tendon, the 4th, plain bars, the 5th, ring flat-plate, the 6th, channel-section steel, the 7th, metal bellows.
Detailed description of the invention
Below in conjunction with drawings and Examples, invention is described in further detail.
As shown in Fig. 1-6.
Embodiment 1
Prestressing without bondn is connected concrete beam concrete-filled circular steel tube column combined joint and constructs as shown in Figure 1 with plain bars:
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 (7).
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 presstressed reinforcing steel upper, bearing plate when this ring flat-plate can be used as tension of prestressed tendon.
Claims (5)
1. prestressing without bondn is connected a concrete beam concrete-filled circular steel tube column combined joint with plain bars, it is characterized in that: this node comprises concrete-filled circular steel tube column (1), reinforced concrete beam (2), unbonded prestressing tendon (3), plain bars (4), ring flat-plate (5), channel-section steel (6); Concrete-filled circular steel tube column (1) and reinforced concrete beam (2) are cast-in-place, and the two connects by unbonded prestressing tendon (3) and plain bars (4); Upper and reinforced concrete beam (2) the junction welding ring flat-plate (5) at concrete-filled circular steel tube column (1), ring flat-plate has corresponding hole on (5); Channel-section steel (6) is welded in round steel pipe; The position of reinforced concrete beam, the corresponding beam section of concrete-filled circular steel tube column is stayed and is established duct, and near built-in metal bellows (7) in the duct of beam upper and lower surface, in metal bellows (7), wear presstressed reinforcing steel (3), tensioned prestressing bar (3) thus by beam column composition entirety.
2. a kind of prestressing without bondn according to claim 1 is connected concrete beam concrete-filled circular steel tube column combined joint with plain bars, 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.
3. a kind of prestressing without bondn according to claim 1 is connected concrete beam concrete-filled circular steel tube column combined joint with plain bars, it is characterized in that: described 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 is slit into the radian identical with round steel pipe, so that welding when contacts completely with round steel pipe.
4. a kind of prestressing without bondn according to claim 1 is connected concrete beam concrete-filled circular steel tube column combined joint with plain bars, it is characterized in that: no-cohesive prestressed reinforcement (3) can provide the clamping force of beam column interface, resist the node vertical shear due to vertical load on beam and horizontal earthquake action generation by this clamping force, this clamping force also makes structure have good automatic recovery ability simultaneously, and the permanent set of structure is dwindled.
5. a kind of prestressing without bondn according to claim 1 is connected concrete beam concrete-filled circular steel tube column combined joint with plain bars, it is characterized in that: at the ring flat-plate (5) of the end of side column, bearing plate while can be used as no-cohesive prestressed reinforcement stretch-draw, simultaneously also can after wear plain bars (4) and be welded on this ring flat-plate, after meeting, wear the anchoring requirement of reinforcing bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410146782.XA CN103938730A (en) | 2014-04-14 | 2014-04-14 | Combination node for connecting concrete beam with round steel tube concrete column through unbonded prestressed ribs and ordinary steel bars |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410146782.XA CN103938730A (en) | 2014-04-14 | 2014-04-14 | Combination node for connecting concrete beam with round steel tube concrete column through unbonded prestressed ribs and ordinary steel bars |
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| CN103938730A true CN103938730A (en) | 2014-07-23 |
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| CN201410146782.XA Pending CN103938730A (en) | 2014-04-14 | 2014-04-14 | Combination node for connecting concrete beam with round steel tube concrete column through unbonded prestressed ribs and ordinary steel bars |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727441A (en) * | 2015-03-31 | 2015-06-24 | 武汉理工大学 | Prestress assembled concrete beam column joint structure and construction method thereof |
| CN105625572A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Prefabricated prestressed concrete frame beam-column joint making disparate use of high performance materials |
| CN105625573A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Beam-bottom medium-strength prestressed steel bar and ordinary steel bar sleeve connecting beam-column joint |
| CN105649203A (en) * | 2016-02-29 | 2016-06-08 | 东南大学 | Prefabricated prestressed concrete frame beam column joint with U-shaped steel bar and sleeves |
| CN105937266A (en) * | 2016-06-15 | 2016-09-14 | 华南理工大学建筑设计研究院 | Structure of reinforced circular steel tube confined concrete column-beam joint |
| CN107060076A (en) * | 2017-01-17 | 2017-08-18 | 重庆大学 | A kind of rectangular steel pipe confined concrete Column border node and its construction method without stirrup |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727441A (en) * | 2015-03-31 | 2015-06-24 | 武汉理工大学 | Prestress assembled concrete beam column joint structure and construction method thereof |
| CN105625572A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Prefabricated prestressed concrete frame beam-column joint making disparate use of high performance materials |
| CN105625573A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Beam-bottom medium-strength prestressed steel bar and ordinary steel bar sleeve connecting beam-column joint |
| CN105649203A (en) * | 2016-02-29 | 2016-06-08 | 东南大学 | Prefabricated prestressed concrete frame beam column joint with U-shaped steel bar and sleeves |
| CN105625572B (en) * | 2016-02-29 | 2018-05-15 | 东南大学 | Distinctiveness uses the precast prestressed concrete frame bean column node of high performance material |
| CN105649203B (en) * | 2016-02-29 | 2018-07-17 | 东南大学 | Precast prestressed concrete frame bean column node with U-shaped muscle and sleeve |
| CN105937266A (en) * | 2016-06-15 | 2016-09-14 | 华南理工大学建筑设计研究院 | Structure of reinforced circular steel tube confined concrete column-beam joint |
| CN107060076A (en) * | 2017-01-17 | 2017-08-18 | 重庆大学 | A kind of rectangular steel pipe confined concrete Column border node and its construction method without stirrup |
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Application publication date: 20140723 |