CN103938734B - Prestressing force is connected beams of concrete square steel tube concrete column combination node with regular reinforcement - Google Patents

Prestressing force is connected beams of concrete square steel tube concrete column combination node with regular reinforcement Download PDF

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Publication number
CN103938734B
CN103938734B CN201410149381.XA CN201410149381A CN103938734B CN 103938734 B CN103938734 B CN 103938734B CN 201410149381 A CN201410149381 A CN 201410149381A CN 103938734 B CN103938734 B CN 103938734B
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China
Prior art keywords
steel
reinforced
concrete column
steel tube
tube concrete
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Expired - Fee Related
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CN201410149381.XA
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Chinese (zh)
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CN103938734A (en
Inventor
马华
王文静
宋坤
解咏平
李振宝
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Beijing University of Technology
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Beijing University of Technology
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Publication of CN103938734B publication Critical patent/CN103938734B/en
Expired - Fee Related legal-status Critical Current
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Abstract

A kind of prestressing force 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, presstressed reinforcing steel, steel plate, channel-section steel.Square steel tube concrete column is cast-in-place with reinforced beam;Square steel tube concrete column is connected with reinforced beam using presstressed reinforcing steel, regular reinforcement;Square steel tube concrete column is connected at section with reinforced beam leaves duct, the built-in metal bellows in duct;Square steel tube concrete is connected at section with beam is welded with steel plate, there is corresponding hole on steel plate;Channel-section steel is welded on square steel tube.Speed of application of the present invention is fast, can be effectively increased the shear-carrying capacity of node, strengthen its switching performance, have a extensive future.

Description

Prestressing force is connected beams of concrete square steel tube concrete column combination with regular reinforcement Node
Technical field
Beams of concrete square steel tube concrete column combination node is connected with regular reinforcement the present invention relates to prestressing force, is belonged to Building structure technology field.
Background technology
Using the history that concrete filled steel tube is existing more than 100 years in architectural engineering.Concrete filled steel tube due to high capacity, The advantages of plasticity and good toughness, good economical benefit and easy construction and paid attention to by engineering circles.Concrete filled steel tube adapts to the modern times Engineering structure is to across, towering, heavily loaded development and the need for bearing mal-condition, the industrialization for meeting Modern Construction Technology will greatly Ask, thus be just increasingly widely used in individual layer and multi storied industrial factory building post, equipment frame post, pier, stake, space knot In structure, commercial square, multistory office and house, high-rise and high-rise building and bridge structure, good economy has been obtained Effect and architectural effect.Especially in recent years, it is rapid in undergoing an unusual development for China's concrete filled steel tube, to concrete filled steel tube The research of structure is also more and more.
The connecting node of square steel tube concrete column and beam is key issue when carrying out concrete filled steel tube engineering design One of, the validity of its connecting node directly affects integrally-built rigidity, stability and bearing capacity, also has influence on scene and applies Work difficulty and construction speed.Existing Concrete-filled tubular connections form is various, and the construction of node and design difficulty often turn into system The bottleneck factor of about new superior structural popularization and application.Therefore, one kind is researched and developed new with in-site installation simple and fast, to operation Personnel's technology and construction environment are less demanding, connect safe and reliable square steel tube concrete column and girder connection form, it appears It is very necessary.
This construction method of bonded prestress, by duct grouting, makes presstressed reinforcing steel mutually be bonded with concrete, mitigates Anchorage transmission prestressing force effect, improves anchorage reliability and durability, is widely used in main supporting member or structure.
The content of the invention
The purpose of the present invention ensure node connection effectively, power transmission it is clear and definite under the premise of, by improving reinforced beam With square steel tube concrete column reinforcing joint connected mode, assembled using presstressed reinforcing steel, regular reinforcement, reduce construction difficult Degree, accelerates construction speed.Speed of application of the present invention is fast, can be effectively increased the shear-carrying capacity of node, strengthen its connectivity Can, have a extensive future.
To achieve the above object, the technical solution adopted by the present invention is that prestressing force is connected beams of concrete side's square with regular reinforcement Shape concrete filled steel tube pile assembled node, as shown in Figure 1, 2, the node include square steel tube concrete column (1) and reinforced concrete Tu Liang (2), the two constitutes overall by presstressed reinforcing steel, regular reinforcement;Square steel tube concrete column (1) and reinforced beam (2) it is cast-in-place;Square steel tube concrete column is connected with reinforced beam (2) using presstressed reinforcing steel (3), regular reinforcement (4) Connect;Duct is left on the section that square steel tube concrete column (1) is connected with reinforced beam (2), the pre-buried gold in duct Belong to bellows (7);Square steel tube concrete column, which is connected with beam at section, is welded with steel plate (5), and steel plate has corresponding on (5) Hole;Channel-section steel (6) is welded on square steel tube concrete column.
The steel plate (5) is general steel plate, and width is beam section height, and thickness is thickness of steel pipe.
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 Highly.
The design principle of the prestressing force size of presstressed reinforcing steel (3) is:The friction shear resisting ability of junction should be ensured, again The stress in presstressed reinforcing steel is set to remain within yield limit.
Bearing plate when the end ring flat-plate of side column can be as presstressed reinforcing steel (3) tensioning.
Compared with prior art, the present invention has the advantages that.
It is fast using this node site operation speed, and the reliability of node connection can be ensured.This node is used Ring flat-plate, can mitigate the weakening effect to bearing capacity when round steel pipe punches;The shearing resistance that can increase bean column node using channel-section steel is held Carry power;Using deformed bar, by duct grouting, presstressed reinforcing steel is mutually bonded with concrete, alleviate anchorage transmission pre- Stress, improves the performance of reinforced beam, and this brings huge economic benefit to the economy of China and social development, Have a extensive future.
Brief description of the drawings
Fig. 1 is interior joint front elevation view
Fig. 2 is mid-side node elevation
Fig. 3 is sectional views of the Fig. 1 along A-A
Fig. 4 is sectional views of the Fig. 2 along B-B
Fig. 5 is sectional views of the Fig. 2 along C-C
Fig. 6 is sectional views of the Fig. 1 along D-D
Wherein, 1 is square steel tube concrete column, and 2 be cast-in-situ steel reinforced concrete beam, and 3 be presstressed reinforcing steel, and 4 be ordinary steel Muscle, 5 be steel plate, and 6 be channel-section steel, and 7 be metal bellows, and 8 be grouting.
Embodiment
The present invention is described in further detail below in conjunction with drawings and examples.
As shown in figures 1 to 6.
Embodiment 1
It is as shown in Figure 1 that prestressing force is connected beams of concrete square steel tube concrete column combination joint structure with regular reinforcement:
1st, square steel tube concrete is positioned
The steel pipe of square steel tube concrete column (1) carries out perforate processing in steel construction processing factory in strict accordance with drawing; Weld all around mode welding steel (5) and channel-section steel (6) are used at square steel tube concrete column (1) connection beam section;Square rectangle steel Pipe concrete column (1) lifting positioning.
2nd, colligation beam reinforcement cages and deformed bar are fixed
Beam bottom mother plate is installed, in strict accordance with design drawing colligation beam reinforcement cages;One side side form is installed, by figure on side form Metal bellows position line is marked in the presstressed reinforcing steel position that paper is provided, and bellows fixed support is welded on beam stirrup successively, Lay metal bellows (7).
3rd, presstressed reinforcing steel lashing
After bellows is fixed, anchor plate is installed in anchored end, presstressed reinforcing steel is penetrated into ripple from what anchored end was smoothed out In pipe.Stretching end spills 0.8m, and the mouth of pipe is stoppered with cement bag paper, prevents cement mortar and curing water from flowing into, and leak outside partial prestressing Reinforcing bar is wrapped with gummed paper prevents moisture corrosion presstressed reinforcing steel.
4th, concreting
Pour square steel tube concrete column and reinforced beam." concrete engineering construction is shown in concreting method Technological standards ".
5th, tension of prestressed tendon
Concrete strength reaches the tensioning that presstressed reinforcing steel is carried out after the 85% of design strength, and tensioning uses symmetrical tensioning side Formula, the position of stretching force is overlapped with duct center line.Cable tensios control using stress and stretch value dual control, stressing sequence is 0 → 10% σcon→ 100% σcon→ 103% σcon→ anchoring.
6th, duct grouting
Fill mortar (7) after the completion of tensioning within 48h to duct, grouting uses 42.5R Portland cements, filling process It is middle to keep continuous consistent.
7th, cut
After tensioning terminates, exposed presstressed reinforcing steel is cut off using portable grinder cutting machine, its protruded length is unsuitable small In 1.5 times of presstressed reinforcing steel diameter, and not less than 30mm.
Embodiment 2
Fig. 2 is seen when for side column node, other measure be the same as Examples 1, simply in the end of side column, presstressed reinforcing steel are welded On steel plate (5), this ring flat-plate can be used as bearing plate during tension of prestressed tendon.

Claims (1)

1. a kind of prestressing force is connected beams of concrete square steel tube concrete column combination node with regular reinforcement, it is characterised in that: Square steel tube concrete column (1) and reinforced beam (2), the two constitutes overall by presstressed reinforcing steel, regular reinforcement;Square rectangle Steel core concrete column (1) is cast-in-place with reinforced beam (2);Square steel tube concrete column and reinforced beam (2) Connected using presstressed reinforcing steel (3), regular reinforcement (4);Square steel tube concrete column (1) is connected with reinforced beam (2) Duct is left on section, built-in metal bellows (7) in duct;Square steel tube concrete column and reinforced beam (2) Connection is welded with steel plate (5) at section, and steel plate has corresponding hole on (5);Channel-section steel (6) is welded on square steel tube concrete column On;
Steel plate (5) is general steel plate, and width is reinforced beam (2) depth of section, and thickness is thickness of steel pipe;
Channel-section steel (6) web height is reinforced beam (2) cross-sectional width, and flange width is that reinforced beam (2) section is high Degree, channel-section steel length is reinforced beam (2) depth of section;
The design principle of the prestressing force size of presstressed reinforcing steel (3) is:The friction shear resisting ability of junction should be ensured, made again pre- Stress in stress rib is remained within yield limit;
Bearing plate when the end ring flat-plate of side column is as presstressed reinforcing steel (3) tensioning.
CN201410149381.XA 2014-04-14 2014-04-14 Prestressing force is connected beams of concrete square steel tube concrete column combination node with regular reinforcement Expired - Fee Related CN103938734B (en)

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CN201410149381.XA CN103938734B (en) 2014-04-14 2014-04-14 Prestressing force is connected beams of concrete square steel tube concrete column combination node with regular reinforcement

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Application Number Priority Date Filing Date Title
CN201410149381.XA CN103938734B (en) 2014-04-14 2014-04-14 Prestressing force is connected beams of concrete square steel tube concrete column combination node with regular reinforcement

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CN103938734B true CN103938734B (en) 2017-07-28

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111236423A (en) * 2020-01-06 2020-06-05 三箭建设工程集团有限公司 Semi-dry type connecting joint of frame beam and column and construction method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08113984A (en) * 1994-10-14 1996-05-07 Kajima Corp Joint structure of steel pipe reinforced concrete column and prestressed beam
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
CN101798849B (en) * 2010-03-26 2011-07-20 东南大学 Node connection device for self-centering prestressed concrete frame
CN203174771U (en) * 2012-12-27 2013-09-04 湖南顺天建设集团有限公司 Annular plate node of steel pipe concrete column and bonded prestress steel bar concrete beam
CN103132602A (en) * 2013-02-27 2013-06-05 同济大学 Self-resetting frame joint

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