CN103924677B - Prestressing without bondn is connected beams of concrete square steel tube concrete column combination node with regular reinforcement - Google Patents
Prestressing without bondn is connected beams of concrete square steel tube concrete column combination node with regular reinforcement Download PDFInfo
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- CN103924677B CN103924677B CN201410149367.XA CN201410149367A CN103924677B CN 103924677 B CN103924677 B CN 103924677B CN 201410149367 A CN201410149367 A CN 201410149367A CN 103924677 B CN103924677 B CN 103924677B
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Abstract
A kind of prestressing without bondn is connected beams of concrete square steel tube concrete column combination node with regular reinforcement, belongs to building structure technology field.Including square steel tube concrete column, reinforced beam, unbonded prestressing tendon, steel plate, channel-section steel.Square steel tube concrete column and reinforced beam are cast-in-place；Square steel tube concrete column adopts unbonded prestressing tendon, regular reinforcement to be connected with reinforced beam；Square steel tube concrete column is connected section with reinforced beam and leaves duct, built-in metal corrugated tube in duct；Square steel tube concrete is connected section and is welded with steel plate with beam, and steel plate has the hole of correspondence；Channel-section steel is welded on square steel tube.Speed of application of the present invention is fast, it is not necessary to On-site Welding Technology, and can ensure that the reliability that node connects, and has good anti-seismic performance, and this node connected mode both may be used for the side column node in structure, it is also possible to for king post joint, has a extensive future.
Description
Technical field
The present invention relates to prestressing without bondn and be connected beams of concrete square steel tube concrete column combination node with regular reinforcement, belong to building structure technology field.
Background technology
Architectural engineering is applied the concrete filled steel tube history of existing more than 100 year.Concrete filled steel tube is subject to the attention of engineering circles owing to having the advantages such as bearing capacity height, plasticity and good toughness, good economical benefit and easy construction.Concrete filled steel tube adapts to modern project structure to big across, development towering, heavily loaded with the needs bearing mal-condition, meet the industrial requirement of Modern Construction Technology, thus just increasingly it is widely used in monolayer and multi storied industrial factory building post, equipment frame post, pier, stake, space structure, commercial square, multistory office and house, high level and high-rise building and bridge structure, achieved with good economic effect and architectural effect.Especially in recent years, undergoing an unusual development rapidly at China's concrete filled steel tube, the research of concrete filled steel tube is also got more and more.
Square steel tube concrete column and beam connect one of key issue when node is by concrete filled steel tube engineering design, its effectiveness connecting node directly affects integrally-built rigidity, stability and bearing capacity, also has influence on site operation difficulty and construction speed.Existing Concrete-filled tubular connections form is various, and the construction of node and design difficulty often become the bottleneck factor restricting novel superior structural popularization and application.Therefore, research and development are a kind of novel has in-site installation simple and fast, and operator's technology and construction environment is less demanding, the reliable square steel tube concrete column of attachment security and girder connection form, it appears very necessary.
Unbonded prestressing tendon is the special presstressed reinforcing steel with anticorrosion sealing coat and oversheath, and it has easy construction, low for equipment requirements, loss of prestress is little, resistance to corrosion is strong, resisting fatigue and the advantage such as anti-seismic performance is good.In operational phase, presstressed reinforcing steel is in elastic state so that structure has very strong automatic recovery ability, and residual deformation is little, has good anti-seismic performance.Therefore building structure it is widely used in.
Summary of the invention
It is an object of the invention under ensureing the premise that node connects effectively, power transmission is clear and definite, by improving reinforced beam and square steel tube concrete column reinforcing joint connected mode, adopt unbonded prestressing tendon to assemble, reduce difficulty of construction, accelerate construction speed.Speed of application of the present invention is fast, it is not necessary to On-site Welding Technology, and can ensure that the reliability that node connects, and has good anti-seismic performance, and this node connected mode both may be used for the side column node in structure, it is also possible to for king post joint, has a extensive future.
For achieving the above object, the technical solution used in the present invention is that prestressing without bondn is connected beams of concrete square steel tube concrete column combination node with regular reinforcement, as shown in Figure 1, 2, this node includes square steel tube concrete column (1) and reinforced beam (2), and the two is formed entirety by unbonded prestressing tendon (3) and regular reinforcement (4)；Square steel tube concrete column (1) and reinforced beam (2) are cast-in-place；Square steel tube concrete column adopts unbonded prestressing tendon (3) to be connected with regular reinforcement (4) with reinforced beam (2)；Duct is left in the cross section that square steel tube concrete column (1) is connected, built-in metal corrugated tube (4) in duct with reinforced beam (2)；Square steel tube concrete is connected section and is welded with steel plate (5) with beam, and steel plate (5) has the hole of correspondence；Channel-section steel (6) is welded on square steel tube.
Described steel 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.
The design principle of the prestressing force size of unbonded prestressing tendon (3) is: should ensure the friction shear resisting ability of junction, within making the stress in presstressed reinforcing steel remain at yield limit again.
Side column end ring flat-plate can as no-cohesive prestressed reinforcement (3) stretch-draw time bearing plate.
Compared with prior art, the present invention has the advantages that.
Adopt this node site operation speed fast, and can ensure that the reliability that node connects.This node adopts ring flat-plate, it is possible to alleviate the weakening effect to bearing capacity when round steel pipe punches；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, making structure have very strong automatic recovery ability, residual deformation is little, has good anti-seismic performance, this brings huge economic benefit to the economy of China and social development, has a extensive future.
Accompanying drawing explanation
Fig. 1 is interior joint front elevation view
Fig. 2 is mid-side node elevation
Fig. 3 is the Fig. 1 sectional view along A-A
Fig. 4 is the Fig. 2 sectional view along B-B
Fig. 5 is the Fig. 2 sectional view along C-C
Fig. 6 is the Fig. 1 sectional view along D-D
Wherein, 1 is square steel tube concrete column, and 2 is cast-in-situ steel reinforced concrete beam, and 3 is unbonded prestressing tendon, and 4 is regular reinforcement, and 5 is steel plate, and 6 is channel-section steel, and 7 is metal bellows.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in figures 1 to 6.
Embodiment 1
Prestressing without bondn is connected beams of concrete square steel tube concrete column combination joint structure as shown in Figure 1 with regular reinforcement:
1, square steel tube concrete location
The steel pipe of square steel tube concrete column (1) carries out perforate process in strict accordance with drawing in steel construction processing factory；Weld all around mode welding steel (5) and channel-section steel (6) is adopted at square steel tube concrete column (1) tie-beam section；Square steel tube concrete column (1) lifting location.
2, colligation beam reinforcement cages and deformed bar are fixed
Install beam bottom mother plate, in strict accordance with design drawing colligation beam reinforcement cages；Installing side form on one side, metal bellows location line is marked in the presstressed reinforcing steel position provided by drawing on side form, has welded corrugated tube fixed support successively, lay metal bellows (4) on beam stirrup.
3, unbonded prestressing tendon lashing
After corrugated tube fixes, install anchor plate in anchored end, presstressed reinforcing steel is penetrated in corrugated tube from what anchored end smoothed out.Stretching end spills 0.8m, and mouth of pipe cement bag paper plug is tight, it is prevented that cement mortar and curing water flow into, and the partial prestressing reinforcing bar gummed paper that leaks outside wraps and prevents moisture corrosion presstressed reinforcing steel.
4, concreting
Build square steel tube concrete column and reinforced 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, and the position of stretching force overlaps with duct centrage.Cable tensios control adopts stress and stretch value dual control, and stressing sequence is 0 → 10% σcon→100%σcon→103%σcon→ anchoring.
6, cutting
After stretch-draw terminates, adopting portable grinder cutting machine will expose presstressed reinforcing steel excision, its protruded length is not preferably less than 1.5 times of presstressed reinforcing steel diameter, and is not less than 30mm.
Embodiment 2
Seeing Fig. 2 when for side column node, unbonded prestressing tendon, with embodiment 1, simply in the end of side column, is welded on steel plate (5) by other measure, this ring flat-plate can as unbonded prestressing tendon stretch-draw time bearing plate.
Claims (5)
1. a prestressing without bondn is connected beams of concrete square steel tube concrete column combination node with regular reinforcement, it is characterized in that: this node includes square steel tube concrete column (1) and reinforced beam (2), the two is formed entirety by unbonded prestressing tendon (3) and regular reinforcement (4)；Square steel tube concrete column (1) and reinforced beam (2) are cast-in-place；Square steel tube concrete column adopts unbonded prestressing tendon (3) to be connected with regular reinforcement (4) with reinforced beam (2)；Duct is left in the cross section that square steel tube concrete column (1) is connected, built-in metal corrugated tube (7) in duct with reinforced beam (2)；Square steel tube concrete is connected section and is welded with steel plate (5) with beam, and steel plate (5) has the hole of correspondence；Channel-section steel (6) is welded on square steel tube.
2. a kind of prestressing without bondn according to claim 1 is connected beams of concrete square steel tube concrete column combination node with regular reinforcement, it is characterised in that: steel 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 beams of concrete square steel tube concrete column combination node with regular reinforcement, 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. a kind of prestressing without bondn according to claim 1 is connected beams of concrete square steel tube concrete column combination node with regular reinforcement, it is characterized in that: the design principle of the prestressing force size of unbonded prestressing tendon (3) is: should ensure the friction shear resisting ability of junction, within making the stress in presstressed reinforcing steel remain at yield limit again.
5. a kind of prestressing without bondn according to claim 1 is connected beams of concrete square steel tube concrete column combination node with regular reinforcement, it is characterised in that: the bearing plate when the end ring flat-plate of side column is as unbonded prestressing tendon (3) stretch-draw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410149367.XA CN103924677B (en) | 2014-04-14 | 2014-04-14 | Prestressing without bondn is connected beams of concrete square steel tube concrete column combination node with regular reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410149367.XA CN103924677B (en) | 2014-04-14 | 2014-04-14 | Prestressing without bondn is connected beams of concrete square steel tube concrete column combination node with regular reinforcement |
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| Publication Number | Publication Date |
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| CN103924677A CN103924677A (en) | 2014-07-16 |
| CN103924677B true CN103924677B (en) | 2016-07-27 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107165272B (en) * | 2017-06-22 | 2024-01-30 | 中国建筑股份有限公司 | Prestressed assembled concrete frame node connecting structure and construction method thereof |
| CN109235639A (en) * | 2018-11-15 | 2019-01-18 | 福建工程学院 | Prestressing without bondn assembling type node and construction method with energy-consuming device |
Citations (6)
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| CN2623764Y (en) * | 2003-05-06 | 2004-07-07 | 屈培元 | Step shaped foam glass thermal insulation walltile |
| CN2784490Y (en) * | 2005-04-22 | 2006-05-31 | 北京工业大学 | Prestress connection node for beam column of assembled concrete frame structure |
| CN101029503A (en) * | 2007-04-06 | 2007-09-05 | 北京工业大学 | Beam and pile assembled node of precast and prestressed concrete structure |
| CN101798849A (en) * | 2010-03-26 | 2010-08-11 | 东南大学 | Node connection device for self-centering prestressed concrete frame |
| JP2013079508A (en) * | 2011-10-03 | 2013-05-02 | Nippon Steel & Sumitomo Metal | Beam-column connection of rigid-frame |
| CN103132602A (en) * | 2013-02-27 | 2013-06-05 | 同济大学 | Self-resetting frame joint |
-
2014
- 2014-04-14 CN CN201410149367.XA patent/CN103924677B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2623764Y (en) * | 2003-05-06 | 2004-07-07 | 屈培元 | Step shaped foam glass thermal insulation walltile |
| CN2784490Y (en) * | 2005-04-22 | 2006-05-31 | 北京工业大学 | Prestress connection node for beam column of assembled concrete frame structure |
| CN101029503A (en) * | 2007-04-06 | 2007-09-05 | 北京工业大学 | Beam and pile assembled node of precast and prestressed concrete structure |
| CN101798849A (en) * | 2010-03-26 | 2010-08-11 | 东南大学 | Node connection device for self-centering prestressed concrete frame |
| JP2013079508A (en) * | 2011-10-03 | 2013-05-02 | Nippon Steel & Sumitomo Metal | Beam-column connection of rigid-frame |
| CN103132602A (en) * | 2013-02-27 | 2013-06-05 | 同济大学 | Self-resetting frame joint |
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| CN103924677A (en) | 2014-07-16 |
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Effective date of registration: 20210120 Address after: Room 1424, Floor 4, Peony Pioneer Building, No. 2 Garden Road, Haidian District, Beijing, 100191 Patentee after: Beijing Zhonglian Technology Service Co.,Ltd. Address before: 100124 No. 100 Chaoyang District Ping Tian Park, Beijing Patentee before: Beijing University of Technology |