CN104975653A - Circular steel tube confined steel reinforced concrete post and reinforced concrete beam node structure - Google Patents
Circular steel tube confined steel reinforced concrete post and reinforced concrete beam node structure Download PDFInfo
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- CN104975653A CN104975653A CN201510341317.6A CN201510341317A CN104975653A CN 104975653 A CN104975653 A CN 104975653A CN 201510341317 A CN201510341317 A CN 201510341317A CN 104975653 A CN104975653 A CN 104975653A
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Abstract
The invention discloses a circular steel tube confined steel reinforced concrete post and reinforced concrete beam node structure, which comprises core sectional steel, node region confined annular beams, first beam longitudinal bars, second beam longitudinal bars, first round steel tubes, second round steel tubes, concrete, node region longitudinal bars and node region hoop bars, wherein the core sectional steel comprises first sectional steel web plates, second sectional steel web plates, first sectional steel flanges and second sectional steel flanges; and each node region refined annular beam comprises annular beam longitudinal bars, annular beam hoop bars and concrete. The circular steel tube confined steel reinforced concrete post and reinforced concrete beam node structure has the advantages that the node region strength is high; the anti-seismic performance is excellent; the bearing capacity is high; the integrality is good; the force transmission is clear; and safety and reliability are realized.
Description
Technical field
The invention belongs to civil engineering structure design field, relate to a kind of round steel pipe binding type steel concrete column and reinforced concrete beam node structure
Background technology
In steel-concrete combined structure, the vertical load-bearing pillar of tradition mainly comprises steel core concrete column and profile steel concrete column two kinds of forms.These two kinds coupled column bearing capacity is high, anti-seismic performance good, cost is moderate, by structural engineer is favored, becomes the first-selected component form of compression ratio of frame columns for high building.But along with the accumulation of engineering practice and the development of high strength structure material, they show certain limitation gradually.The ductility of concrete filled steel tube is better than steel concrete, but steel pipe just produces effective effect of contraction to core concrete after entering elastic-plastic phase in steel core concrete column, binding effect is not strong, and steel pipe and concrete shared axial load easily cause steel pipe Plate buckling, cause pillar anti-seismic performance to decline.When steel core concrete column is connected with reinforced concrete beam, node often adopts through ribbed and outer annular-stiffer formula two kinds, and design of node is complicated, and difficulty of construction is large.Then need in profile steel concrete column to establish reinforcing cage to ensure the acting in conjunction of concrete and shaped steel, cause cross section shaped steel and reinforcing bar densely distributed, concreting and difficulty of vibrating, and concrete is tied deficiency in profile steel concrete column, cause limit value of axial compression ratio on the low side, steel and concrete supporting capacity can not be made full use of.
In long-term research work and engineering practice basis, Zhou Xuhong etc. propose a kind of Novel combined column form of structure-steel tube binding type steel concrete column.The outside steel pipe of steel tube binding type steel concrete column disconnects at bean column node place, and not by joint cores, steel pipe does not directly bear longitudinal load, only plays effect of contraction to core concrete.Steel tube binding type steel concrete column inherits the advantage of steel core concrete column and profile steel concrete column, and steel pipe is applied with continuous constraint effect to concrete, improves concrete compressive strength and improves concrete ductility; The existence of shaped steel improves the shear resistance of pillar; Concrete existence compensate for the shortcoming of shaped steel and the easy flexing unstability of empty steel pipe.Based on the mechanical property that steel tube binding type steel concrete is superior, Chinese scholars conducts in-depth research it in recent years.Research shows, the resistance to compression of steel tube binding type steel concrete column, shear-carrying capacity are high, and anti-seismic performance is superior, and stratified deformation ability is strong, and fire resistance is good, easy construction, can make full use of Materials with High Strength performance, is a kind of combining structure form with broad development prospect.
At present, the concrete research of steel tube binding type steel is mainly concentrated on to static(al) and the anti-seismic performance of component, system is not yet goed deep into the research of steel tube binding type steel concrete column-steel concrete girder connection and carries out.Concrete frame joint is the important component part of frame construction, and the mechanical property of joint cores plays critical effect to the integral rigidity of structure and stress performance.All previous earthquake shows, node area is the position be easily damaged under geological process, and node area supporting capacity or deformability deficiency are the major reasons causing structural deterioration.The joint forms such as the through ribbed of conventional steel beam column built from concrete and outer annular-stiffer formula, all must rely on steel pipe Transfer of Shear in varying degrees, thus make steel pipe directly bear longitudinal force.And when adopting steel tube binding type steel concrete frame trestle, due to the essential distinction of force modes, steel pipe disconnects in node area, and node area is on the weak side, and conventional node cannot be continued to use.Promote the new structural members that this stress performance of steel tube binding type steel concrete column is good, must the node that adapts with it of research and design.
In sum, the excellent in mechanical performance of steel tube binding type steel concrete column, has wide application prospect.But because post outside steel pipe disconnects in node area, there is essential distinction with the force modes of traditional group zygostyle, rely on outside steel pipe in various degree.
The conventional node of Transfer of Shear cannot be continued to use, and the node being applicable to steel tube binding type steel concrete column studies not yet system expansion, almost blank, seriously constrains the concrete application & development of steel tube binding type steel.
Joint behavior research is key scientific problems urgently to be resolved hurrily, therefore, system further investigation steel tube binding type steel concrete column and reinforced concrete beam joints performance, propose to meet " strong node, weak component " design principles, bearing capacity is high, good integrity, power transmission is clear and definite, and safe and reliable, the joint form of easy construction is steel tube confinement reinforced concrete structure research aspect key scientific problems urgently to be resolved hurrily.
Summary of the invention
The object of the invention is to the shortcoming overcoming above-mentioned prior art, provide a kind of round steel pipe binding type steel concrete column and reinforced concrete beam node structure, the node area intensity of this structure is strong, excellent earthquake resistance, bearing capacity is high, good integrity, power transmission is clear and definite, and safely, reliably.
For achieving the above object, round steel pipe binding type steel concrete column of the present invention and reinforced concrete beam node structure comprise core shaped steel, node area retrains ring beam, the first beam indulges muscle, the second beam indulges muscle, the first round steel pipe, the second round steel pipe and concrete;
Described core type ladle draws together the first shape steel web and the second shape steel web, first shape steel web and the second shape steel web form cross-shaped steel, and the two ends of the first shape steel web are all fixed with the first section steel flange, the two ends of the second shape steel web are all fixed with the second section steel flange, each first beam indulges the side of muscle through the second shape steel web, and each first beam indulges the both sides that muscle is distributed in the first section steel flange, each second beam indulges the side of muscle through the first shape steel web, and each second beam indulges the both sides that muscle is distributed in the second section steel flange, first beam is indulged muscle and the second beam and is indulged muscle and constitute a decussate texture,
Node area confinement ring beam casing is connected to the outside of core shaped steel, and each first beam indulges muscle and each second beam indulges the both sides up and down that muscle is all distributed in node area constraint ring beam;
First round steel pipe and the second round steel pipe are socketed on core shaped steel, and the first round steel pipe and the second round steel pipe are positioned at the both sides up and down of decussate texture;
Core shaped steel, the first beam indulge muscle, the second beam indulges muscle and node area constraint ring beam is all wrapped in concrete, and the first round steel pipe and the second round steel pipe are all socketed on concrete.
Described each first beam indulges muscle and the first beam stirrup colligation forms reinforcing cage;
Described each second beam indulges muscle and the second beam stirrup colligation forms reinforcing cage.
Also comprise some node area longitudinal reinforcements, each point node area longitudinal reinforcement is uniformly distributed along the circumference of core shaped steel, the two ends up and down of each node area longitudinal reinforcement are individually fixed on the first round steel pipe inwall and on the inwall of the second round steel pipe, and each node area longitudinal reinforcement is wrapped in concrete.
Described each node area longitudinal reinforcement and the colligation of some node area stirrups form reinforcing cage.
Node area constraint ring beam comprises some ring beams and indulges muscle and some ring beam stirrups, each ring beam is indulged muscle and is socketed on core shaped steel, and each first beam is indulged muscle and each second beam and indulged muscle and be all distributed in the both sides up and down that ring beam indulges muscle, each ring beam indulges muscle and the colligation of ring beam stirrup forms reinforcing cage.
Described first round steel pipe and have gap between the second round steel pipe and decussate texture.
The side opening of described second shape steel web is provided with some first through holes, and the first beam indulges muscle through described first through hole, and the side opening of the first shape steel web is provided with some second through holes, and the second beam indulges muscle through described second through hole.
Each first beam indulges the parallel distribution of muscle;
Each second beam indulges the parallel distribution of muscle;
The parallel distribution of each node area longitudinal reinforcement;
Each ring beam indulges the parallel distribution of muscle.
The present invention has following beneficial effect:
In round steel pipe binding type steel concrete column of the present invention and reinforced concrete beam node structure, the first beam is indulged muscle and the second beam and is indulged muscle and be each passed through the second shape steel web and the first shape steel web, effective effect improving transmission moment of flexure, thus strengthen the intensity of node area, improve Seismic Behavior, safety, globality and bearing capacity, round steel pipe and cross-shaped steel can provide effective effect of contraction to round steel pipe inner concrete, and the concrete simultaneously in round steel pipe also can make up shaped steel and empty steel pipe with the shortcoming of easy flexing unstability.In addition, node area confinement ring beam casing is connected to the outside of core shaped steel, and each first beam indulges muscle and each second beam indulges the both sides up and down that muscle is distributed in node area constraint ring beam, ensure the rigidity of node, thus avoid node area transverse breakage, bearing capacity is significantly promoted, and simplicity of design, constructability, node area is wrapped in concrete, and overall performance is excellent.
Further, also comprise some node area longitudinal reinforcements and some node area stirrups, make node area stirrup and node area longitudinal reinforcement form reinforcing cage, effectively make up the loss that round steel pipe disconnects axial rigidity and the intensity produced, optimize the design of node area.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is sectional view of the present invention.
Wherein, 1 be node area longitudinal reinforcement, 2 be node area stirrup, 31 be the first section steel flange, 32 be the second section steel flange, 41 to be the first shape steel web, 42 be the second shape steel web, 5 be core shaped steel, 61 to be the second round steel pipe, 62 be the first round steel pipe, 7 for concrete, 81 be the first beam indulge muscle, 82 be the second beam indulge muscle, 9 be the first beam stirrup, 10 to indulge muscle, 11 for ring beam be ring beam stirrup, 12 be that node area retrains ring beam.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
With reference to figure 1 and Fig. 2, round steel pipe binding type steel concrete column of the present invention and reinforced concrete beam node structure comprise core shaped steel 5, node area retrains ring beam 12, first beam and indulges muscle 81, second beam and indulge muscle 82, first round steel pipe 62, second round steel pipe 61 and concrete seven, described core shaped steel 5 comprises the first shape steel web 41 and the second shape steel web 42, first shape steel web 41 and the second shape steel web 42 form cross-shaped steel, and the two ends of the first shape steel web 41 are all fixed with the first section steel flange 31, the two ends of the second shape steel web 42 are all fixed with the second section steel flange 32, each first beam indulges the side of muscle 81 through the second shape steel web 42, and each first beam indulges the both sides that muscle 81 is distributed in the first section steel flange 31, each second beam indulges the side of muscle 82 through the first shape steel web 41, and each second beam indulges the both sides that muscle 82 is distributed in the second section steel flange 32, first beam is indulged muscle 81 and the second beam and is indulged muscle 82 and constitute a decussate texture, node area constraint ring beam 12 is socketed on the outside of core shaped steel 5, and each first beam indulges muscle 81 and each second beam indulges the both sides up and down that muscle 82 is all distributed in node area constraint ring beam 12, first round steel pipe 62 and the second round steel pipe 61 are socketed on core shaped steel 5, and the first round steel pipe 62 and the second round steel pipe 61 are positioned at the both sides up and down of decussate texture, core shaped steel 5, first beam indulge muscle 81, second beam indulge muscle 82 and node area constraint ring beam 12 be all wrapped in concrete seven, the first round steel pipe 62 and the second round steel pipe 61 are all socketed on concrete seven.
It should be noted that, described each first beam indulges muscle 81 and the first beam stirrup 9 colligation forms reinforcing cage; Each second beam indulges muscle 82 and the second beam stirrup colligation forms reinforcing cage.In addition, the present invention also comprises some node area longitudinal reinforcements 1, each point node area longitudinal reinforcement 1 is uniformly distributed along the circumference of core shaped steel 5, the two ends up and down of each node area longitudinal reinforcement 1 are individually fixed on the first round steel pipe 62 inwall and on the inwall of the second round steel pipe 61, and each node area longitudinal reinforcement 1 is wrapped in concrete seven; Each node area longitudinal reinforcement 1 forms reinforcing cage with the colligation of some node area stirrups 2; Node area constraint ring beam 12 comprises some ring beams and indulges muscle 10 and some ring beam stirrups 11, each ring beam is indulged muscle 10 and is socketed on core shaped steel 5, and each first beam is indulged muscle 81 and each second beam and indulged muscle 82 and be all distributed in the both sides up and down that ring beam indulges muscle 10, each ring beam is indulged muscle 10 and is formed reinforcing cage with ring beam stirrup 11 colligation; First round steel pipe 62 and have gap between the second round steel pipe 61 and decussate texture; The side opening of the second shape steel web 42 is provided with some first through holes, and the first beam indulges muscle 81 through described first through hole, and the side opening of the first shape steel web 41 is provided with some second through holes, and the second beam indulges muscle 82 through described second through hole; Each first beam indulges the parallel distribution of muscle 81; Each second beam indulges the parallel distribution of muscle 82; The parallel distribution of each node area longitudinal reinforcement 1; Each ring beam indulges the parallel distribution of muscle 10.
Implementation process of the present invention is:
1) first by designing requirement processing and fabricating core shaped steel 5, and hole is opened on first shape steel web 41 and the second shape steel web 42 of core shaped steel 5; 2) core shaped steel 5 and the second round steel pipe 61 is lifted; 3) by design colligation node area longitudinal reinforcement 1 and node area stirrup 2, conveniently connect the first beam and indulge muscle 81 and the second beam indulges muscle 82, can node area stirrup 2 under first colligation in the second round steel pipe 61, and with construction measure, reinforcing cage being fixed in the second round steel pipe 61, the ring beam in then colligation node area constraint ring beam 12 indulges muscle 10 and ring beam stirrup 11; 4) the first beam is indulged muscle 81 and the second beam to indulge muscle 82 and directly pass from the first through hole core shaped steel 5 and the second through hole, and colligation first beam stirrup 9 and the second beam stirrup; 5) the node area stirrup 2 on colligation Nodes and top; 6) the first round steel pipe 62 is lifted; 7) casting beams, post and Nodes concrete seven, overall unification is built.
Claims (8)
1. a round steel pipe binding type steel concrete column and reinforced concrete beam node structure, it is characterized in that, comprise core shaped steel (5), node area constraint ring beam (12), the first beam indulges muscle (81), the second beam indulges muscle (82), the first round steel pipe (62), the second round steel pipe (61) and concrete (7);
Described core shaped steel (5) comprises the first shape steel web (41) and the second shape steel web (42), first shape steel web (41) and the second shape steel web (42) form cross-shaped steel, and the two ends of the first shape steel web (41) are all fixed with the first section steel flange (31), the two ends of the second shape steel web (42) are all fixed with the second section steel flange (32), each first beam indulges the side of muscle (81) through the second shape steel web (42), and each first beam indulges the both sides that muscle (81) is distributed in the first section steel flange (31), each second beam indulges the side of muscle (82) through the first shape steel web (41), and each second beam indulges the both sides that muscle (82) is distributed in the second section steel flange (32), first beam is indulged muscle (81) and the second beam and is indulged muscle (82) and constitute a decussate texture,
Node area constraint ring beam (12) is socketed on the outside of core shaped steel (5), and each first beam indulges muscle (81) and each second beam indulges the both sides up and down that muscle (82) is all distributed in node area constraint ring beam (12);
First round steel pipe (62) and the second round steel pipe (61) are socketed on core shaped steel (5), and the first round steel pipe (62) and the second round steel pipe (61) are positioned at the both sides up and down of decussate texture;
Core shaped steel (5), the first beam indulge muscle (81), the second beam indulges muscle (82) and node area constraint ring beam (12) is all wrapped in concrete (7), and the first round steel pipe (62) and the second round steel pipe (61) are all socketed on concrete (7).
2. round steel pipe binding type steel concrete column according to claim 1 and reinforced concrete beam node structure, is characterized in that, also comprises the first beam stirrup (9) and the second beam stirrup
Described each first beam is indulged muscle (81) and is formed reinforcing cage with the first beam stirrup (9) colligation;
Described each second beam is indulged muscle (82) and is formed reinforcing cage with the second beam stirrup colligation.
3. round steel pipe binding type steel concrete column according to claim 1 and reinforced concrete beam node structure, it is characterized in that, also comprise some node area longitudinal reinforcements (1), each point node area longitudinal reinforcement (1) is uniformly distributed along the circumference of core shaped steel (5), the two ends up and down of each node area longitudinal reinforcement (1) are individually fixed on the first round steel pipe (62) inwall and on the inwall of the second round steel pipe (61), and each node area longitudinal reinforcement (1) is wrapped in concrete (7).
4. round steel pipe binding type steel concrete column according to claim 3 and reinforced concrete beam node structure, is characterized in that, described each node area longitudinal reinforcement (1) forms reinforcing cage by some node area stirrup (2) colligations.
5. round steel pipe binding type steel concrete column according to claim 3 and reinforced concrete beam node structure, it is characterized in that, node area constraint ring beam (12) comprises some ring beams and indulges muscle (10) and some ring beam stirrups (11), each ring beam is indulged muscle (10) and is socketed on core shaped steel (5), and each first beam is indulged muscle (81) and each second beam and indulged muscle (82) and be all distributed in the both sides up and down that ring beam indulges muscle (10), each ring beam is indulged muscle (10) and is formed reinforcing cage with ring beam stirrup (11) colligation.
6. described round steel pipe binding type steel concrete column according to claim 1 and reinforced concrete beam node structure, it is characterized in that, described first round steel pipe (62) and have gap between the second round steel pipe (61) and described decussate texture.
7. described round steel pipe binding type steel concrete column according to claim 1 and reinforced concrete beam node structure, it is characterized in that, the side opening of described second shape steel web (42) is provided with some first through holes, first beam indulges muscle (81) through described first through hole, the side opening of the first shape steel web (41) is provided with some second through holes, and the second beam indulges muscle (82) through described second through hole.
8. round steel pipe binding type steel concrete column according to claim 5 and reinforced concrete beam node structure, is characterized in that,
Each first beam indulges muscle (81) parallel distribution;
Each second beam indulges muscle (82) parallel distribution;
The parallel distribution of each node area longitudinal reinforcement (1);
Each ring beam indulges muscle (10) parallel distribution.
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| CN201510341317.6A CN104975653A (en) | 2015-06-18 | 2015-06-18 | Circular steel tube confined steel reinforced concrete post and reinforced concrete beam node structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707055A (en) * | 2019-02-28 | 2019-05-03 | 清华大学 | The switching node and construction method of upper layer steel pipe column and lower layer's reinforced column |
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2015
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Patent Citations (5)
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| JP2578673B2 (en) * | 1990-02-23 | 1997-02-05 | 清水建設株式会社 | Building construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109707055A (en) * | 2019-02-28 | 2019-05-03 | 清华大学 | The switching node and construction method of upper layer steel pipe column and lower layer's reinforced column |
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Application publication date: 20151014 |