CN103938732A - Combination joint of prefabricated concrete beam and rectangular concrete filled steel tubular column connected through pre-stressed steel bars and common steel bars - Google Patents
Combination joint of prefabricated concrete beam and rectangular concrete filled steel tubular column connected through pre-stressed steel bars and common steel bars Download PDFInfo
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- CN103938732A CN103938732A CN201410146967.0A CN201410146967A CN103938732A CN 103938732 A CN103938732 A CN 103938732A CN 201410146967 A CN201410146967 A CN 201410146967A CN 103938732 A CN103938732 A CN 103938732A
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Abstract
The invention discloses a combination joint of a prefabricated concrete beam and a rectangular concrete filled steel tubular column connected through pre-stressed steel bars and common steel bars, and belongs to the technical field of building structures. The combination joint comprises the rectangular concrete filled steel tubular column, the reinforced concrete beam, the pre-stressed steel bars, steel plates and channel steel. The rectangular concrete filled steel tubular column and the reinforced concrete beam are both prefabricated; a hole channel is reserved in the cross section, corresponding to the rectangular concrete filled steel tubular column, of the prefabricated concrete beam, and a metal corrugated pipe is pre-buried in the hole channel; the steel plates are welded to the cross section, connected with the reinforced concrete beam, of the rectangular concrete filled steel tubular column; the channel steel is welded onto a rectangular steel pipe, the common steel bars, the pre-stressed steel bars and tension pre-stressed steel bars penetrate through the metal corrugated pipe backwards; after tension is completed, hole channel grouting is completed within forty right hours, and therefore the beam and the column form a whole. The combination joint is high in construction speed, the anti-shear bearing capacity of the joint can be effectively increased, the connecting performance of the joint is enhanced and the application prospects are wide.
Description
Technical field
The present invention relates to prestressing force and be connected precast concrete beam square steel tube concrete column combination node 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 square steel tube concrete 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, and the construction of node and design difficulty often become the bottleneck factor that the novel superior structural of restriction is applied.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 square steel tube concrete column and girder connection form, seem very necessary.
This construction method of bonded prestress, by duct grouting, bonds presstressed reinforcing steel and concrete mutually, has alleviated ground tackle and has transmitted prestressing force effect, has improved anchorage reliability and durability, is widely used in main supporting member or 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 precast reinforced concrete beam and square steel tube concrete column reinforcing joint connected mode, adopt presstressed reinforcing steel and plain bars to be incorporated into luggage and join, reduced difficulty of construction, accelerated construction speed.Speed of application of the present invention is fast, can effectively increase the shear-carrying capacity of node, strengthens its switching performance, has a extensive future.
For achieving the above object, the technical solution used in the present invention is that prestressing force is connected precast concrete beam square steel tube concrete column combination node with plain bars, as shown in Figure 1, 2, this node comprises square steel tube concrete column, reinforced concrete beam, presstressed reinforcing steel, plain bars, steel plate, channel-section steel; Square steel tube concrete column (1) and reinforced concrete beam (2) are prefabricated, and the two connects by presstressed reinforcing steel (3) and plain bars (4); Upper and reinforced concrete beam (2) the junction welding steel (5) at square steel tube concrete column (1), steel plate has corresponding hole on (5); Channel-section steel (6) is welded on square steel tube; The position of reinforced concrete beam, the corresponding beam section of square steel tube concrete column is stayed and is established duct, and near built-in metal bellows (7) in the duct of beam upper and lower surface, after in metal bellows (7), wear plain bars (4), in intermetallic metal bellows (7), wear presstressed reinforcing steel (3), tensioned prestressing bar (3), after completing, stretch-draw fills with mortar (8) within 48h in duct, 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.
After wear plain bars (4), be mainly used to the bending resistance of the energy dissipation capacity and the assisted Extraction high node that increase node, after wear plain bars reserving hole channel adopt bellows, to wear bonding, the anchoring property of nonprestressed reinforcement after increasing.
The design principles of the prestressing force size of presstressed reinforcing steel (3) is: should ensure the friction shear resisting ability of junction, make again the stress in presstressed reinforcing steel remain in yield limit.
At the steel plate (5) of the end of side column, the bearing plate while can be used as prestressed reinforcement stretch-draw, simultaneously also can after wear plain bars (4) and be welded on this steel 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 steel plate, the weakening effect to bearing capacity can alleviate square steel tube and punch time; Adopt channel-section steel can increase the shear-carrying capacity of bean column node; Adopt prestressed reinforcement, by duct grouting, presstressed reinforcing steel and concrete are bondd mutually, alleviate ground tackle and transmitted prestressing force effect, improved the performance of reinforced concrete beam, 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, square steel tube concrete column, the 2nd, precast reinforced concrete beam, the 3rd, presstressed reinforcing steel, the 4th, plain bars, the 5th, steel plate, the 6th, channel-section steel, the 7th, metal bellows, the 8th, grouting.
Detailed description of the invention
Below with reference to drawings and Examples, the present invention is described in further detail.
As shown in Fig. 1-6.
Embodiment 1
Prestressing force is connected precast concrete beam square steel tube concrete column combination joint structure as shown in Figure 1 with plain bars:
1, the making of square steel tube concrete and reinforced concrete beam
In factory in strict accordance with related specifications and drawing making square steel tube concrete column (1) and reinforced concrete beam (2), when prefabricated, all reserve 6 corresponding ducts, duct internal diameter is than the large 15mm of presstressed reinforcing steel (3) diameter, near built-in metal bellows (7) in the duct of lower section on beam, at the upper tie-beam of square steel tube concrete column (1), place adopts weld all around mode welding steel (5) and channel-section steel (6).
2, the assembling of bean column node
Behind square steel tube concrete column (1) location, make reinforced concrete beam (2) lifting location by support.
3, presstressed reinforcing steel and plain bars lashing
In bellows (7), wear plain bars (4), lashing finishes post-grouting.In middle bellows (7), wear presstressed reinforcing steel (3).
4, tensioned prestressing bar
Tensioned prestressing bar when slurry intensity reaches design strength (3), stretch-draw adopts symmetrical stretching mode, and 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.，
5, 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, is in the end of side column, bearing plate when steel plate (5) can be used as prestressed reinforcement (3) stretch-draw, simultaneously also can after wear plain bars (4) and be welded on this steel plate, after meeting, wear the anchoring requirement of reinforcing bar.
Claims (6)
1. prestressing force is connected precast concrete beam square steel tube concrete column combination node with plain bars, it is characterized in that: this node comprises square steel tube concrete column (1), reinforced concrete beam (2), presstressed reinforcing steel (3), plain bars (4), steel plate (5), channel-section steel (6); Square steel tube concrete column (1) and reinforced concrete beam (2) are prefabricated, and the two connects by presstressed reinforcing steel (3) and plain bars (4); Upper and reinforced concrete beam (2) the junction welding steel (5) at square steel tube concrete column (1), steel plate has corresponding hole on (5); Channel-section steel (6) is welded on square steel tube; The position of reinforced concrete beam, the corresponding beam section of square steel tube concrete column is stayed and is established duct, and near built-in metal bellows (7) in the duct of beam upper and lower surface, after in metal bellows (7), wear plain bars (4), in intermetallic metal bellows (7), wear presstressed reinforcing steel (3), tensioned prestressing bar (3), after completing, stretch-draw fills with mortar (8) within 48h in duct, thereby by beam column composition entirety.
2. prestressing force according to claim 1 is connected precast concrete beam square steel tube concrete column combination node with plain bars, it is characterized in that: described ring flat-plate (5) is general steel plate, and width is beam section height, and thickness is thickness of steel pipe.
3. prestressing force according to claim 1 is connected precast concrete beam square steel tube concrete column combination node 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, and channel-section steel length is beam section height.
4. prestressing force according to claim 1 is connected precast concrete beam square steel tube concrete column combination node with plain bars, it is characterized in that: after wear plain bars (4), be mainly used to the bending resistance of the energy dissipation capacity and the assisted Extraction high node that increase node, after wear plain bars reserving hole channel adopt bellows, to wear bonding, the anchoring property of nonprestressed reinforcement after increasing.
5. prestressing force according to claim 1 is connected precast concrete beam square steel tube concrete column combination node with plain bars, it is characterized in that: the design principles of the prestressing force size of presstressed reinforcing steel (3) is: should ensure the friction shear resisting ability of junction, make again the stress in presstressed reinforcing steel remain in yield limit.
6. prestressing force according to claim 1 is connected precast concrete beam square steel tube concrete column combination node with plain bars, it is characterized in that: at the steel plate (5) of the end of side column, bearing plate while can be used as prestressed reinforcement stretch-draw, simultaneously also can after wear plain bars (4) and be welded on this steel plate, after meeting, wear the anchoring requirement of reinforcing bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410146967.0A CN103938732A (en) | 2014-04-14 | 2014-04-14 | Combination joint of prefabricated concrete beam and rectangular concrete filled steel tubular column connected through pre-stressed steel bars and common steel bars |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410146967.0A CN103938732A (en) | 2014-04-14 | 2014-04-14 | Combination joint of prefabricated concrete beam and rectangular concrete filled steel tubular column connected through pre-stressed steel bars and common steel bars |
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| CN103938732A true CN103938732A (en) | 2014-07-23 |
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| CN201410146967.0A Pending CN103938732A (en) | 2014-04-14 | 2014-04-14 | Combination joint of prefabricated concrete beam and rectangular concrete filled steel tubular column connected through pre-stressed steel bars and common steel bars |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107217744A (en) * | 2017-06-23 | 2017-09-29 | 东南大学 | Edge of a wing friction-type shape-memory alloy rod Self-resetting steel-frame beam king post joint |
| CN108755948A (en) * | 2018-07-10 | 2018-11-06 | 福州大学 | The assembled beam-column node structure and its construction method of tenon formula connection |
| CN110554092A (en) * | 2014-09-18 | 2019-12-10 | 株式会社东芝 | Detection system and detection method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110554092A (en) * | 2014-09-18 | 2019-12-10 | 株式会社东芝 | Detection system and detection method |
| CN110554092B (en) * | 2014-09-18 | 2022-07-22 | 株式会社东芝 | Detection system and detection method |
| CN107217744A (en) * | 2017-06-23 | 2017-09-29 | 东南大学 | Edge of a wing friction-type shape-memory alloy rod Self-resetting steel-frame beam king post joint |
| CN108755948A (en) * | 2018-07-10 | 2018-11-06 | 福州大学 | The assembled beam-column node structure and its construction method of tenon formula connection |
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Application publication date: 20140723 |
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