CN109680808B - Method and structure for anchoring pre-tensioning prefabricated superposed beam steel strands at beam column joints - Google Patents
Method and structure for anchoring pre-tensioning prefabricated superposed beam steel strands at beam column joints Download PDFInfo
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- CN109680808B CN109680808B CN201910070679.4A CN201910070679A CN109680808B CN 109680808 B CN109680808 B CN 109680808B CN 201910070679 A CN201910070679 A CN 201910070679A CN 109680808 B CN109680808 B CN 109680808B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- Structural Engineering (AREA)
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Abstract
The invention relates to an anchoring method of a pretensioned prefabricated superposed beam steel strand at a beam column node, which comprises the following process steps: 1) Arranging the extending direction of the steel strand anchoring sections of two prefabricated superposed beams which extend into the same column and are opposite in the same direction; 2) And a plurality of composite stirrups are arranged for the steel strand anchoring sections from the inner sides of the vertical steel bars of the columns, and the steel strand anchoring sections and the composite stirrups are fixed together by steel wires. The invention can effectively avoid the mutual collision of the steel strands and the confusion of overlapping and overlapping of the steel strands when the prefabricated superposed beam is installed, thereby facilitating the installation of the prefabricated superposed beam, ensuring the effective contact and wrapping action of the steel strand anchoring section and the beam column node concrete and improving the anchoring effect of the steel strands.
Description
[ field of technology ]
The invention relates to an anchoring method and an anchoring structure, in particular to an anchoring method of a pretensioned prefabricated superposed beam steel strand at a beam column node, and belongs to the technical field of constructional engineering.
[ background Art ]
The pre-tensioning prefabricated laminated beam generally adopts steel strands as prestressed tendons, and is often used in large-span and heavy-load buildings, such as multi-layer warehouse buildings and multi-layer logistics buildings, in order to fully play the advantages of the pre-tensioning prefabricated laminated beam.
However, the anchoring problem of the steel strand used for prefabricating the laminated beam by the pretensioning method at the beam column joint is not solved well, because the anchoring length of the steel strand is in direct proportion to the design strength thereof according to the requirement of the anti-seismic standard, and therefore, the anchoring length required by the steel strand with high strength often exceeds the section size of the deep column.
In addition, the large span and heavy load characteristics of the building applied by the pretensioning method prefabricated laminated beams also determine that the number of steel strands used at the lower part of the laminated beams is large, and often 3 rows and nearly 20 steel strands are formed, so that serious collision situations occur among the prefabricated laminated beams connected on the same column in the same direction, and if the steel strands adopt a bent anchor mode, the collision is more serious. On the one hand, the collision can cause dislocation and even rollover of the superposed beam assembled firstly due to the collision of steel strands of the superposed beam assembled later when the superposed beam is assembled. On the other hand, the steel strands are overlapped together, so that the engagement between the concrete and the steel strands is seriously influenced, and the anchoring effect of the steel strands is influenced.
Therefore, in order to solve the above-mentioned technical problems, it is necessary to provide an innovative anchoring method and structure of the pre-tensioned prefabricated composite beam steel strand at the beam-column node, so as to overcome the defects in the prior art.
[ invention ]
In order to solve the problems, the invention aims to provide an anchoring method for prefabricating superposed beam steel strands at beam column joints by a pretensioning method, which can effectively avoid the mutual collision and staggering of the steel strands.
The invention further aims to provide an anchoring structure of the pretensioned prefabricated superposed beam steel strand at the beam column node.
In order to achieve the first object, the present invention adopts the following technical scheme: the anchoring method of the pretensioned prefabricated superposed beam steel strand at the beam column node comprises the following process steps:
1) Arranging the extending direction of the steel strand anchoring sections of two prefabricated superposed beams which extend into the same column and are opposite in the same direction;
2) And a plurality of composite stirrups are arranged for the steel strand anchoring sections from the inner sides of the vertical steel bars of the columns, and the steel strand anchoring sections and the composite stirrups are fixed together by steel wires.
The anchoring method of the pretensioned prefabricated superposed beam steel strand at the beam column node further comprises the following steps: the step 1) specifically comprises the following steps: the steel strand anchoring section on one of the superposed beams starts from a first row of steel strands at one side, the first row of steel strands and a second row of steel strands are twisted and hinged together through steel wires, are combined to form a row, and are analogized to form a row from every two rows; and then the steel strand anchoring section on the other superposed beam starts from the second row of steel strands on the same side, the second row of steel strands and the third row of steel strands are hinged together through vertical steel wires, are combined to form a row, and are analogized to each two rows to form a row.
The anchoring method of the pretensioned prefabricated superposed beam steel strand at the beam column node further comprises the following steps: the length of the steel strand anchoring section is 50mm smaller than the length of the column in the same direction.
The anchoring method of the pretensioned prefabricated superposed beam steel strand at the beam column node further comprises the following steps: the steel wire specification is not less than 18#, and the length of the steel wire is greater than the distance between the uppermost steel strand and the lowermost steel strand; when binding, the steel wires are enclosed to form two rows of steel strands which are needed to be combined, the wire binding opening is screwed with a tool, and then the tool is used for screwing between every two rows of steel strands, so that the two rows of adjacent steel strands are close together.
The anchoring method of the pretensioned prefabricated superposed beam steel strand at the beam column node is as follows: the steel strand anchoring sections are combined by the steel wires from the position 50mm away from the inner side of the vertical steel bar of the column.
In order to achieve the second object, the invention adopts the following technical scheme: an anchoring structure of a pretensioned prefabricated superposed beam steel strand at a beam column node comprises a column and a superposed beam; wherein, a circle of vertical steel bars extend from the top of the column; the superposed beams are arranged on the posts and are oppositely arranged in pairs; the end part of the superposed beam extends to form a steel strand anchoring section; adjacent two rows of steel strand anchoring sections of one superposed beam are twisted together by steel wires in pairs; the first row of steel strand anchoring sections of the other superposed beam are remained, and the other two adjacent rows of steel strand anchoring sections are twisted and hinged together by steel wires; the steel strand anchoring section is fixed together through steel wires and a plurality of composite stirrups.
The anchoring structure of the pretensioned prefabricated superposed beam steel strand at the beam column node is further as follows: and a vertical steel bar passes through the twisted steel strand anchoring sections.
The anchoring structure of the pretensioned prefabricated superposed beam steel strand at the beam column node is also as follows: the composite stirrup is provided with 3 to 4 channels.
Compared with the prior art, the invention has the following beneficial effects:
1. the anchoring method and the structure of the steel strands of the pretensioned prefabricated composite beam at the beam column joint combine the characteristic of good elasticity of the steel strands, and the steel wires are used for merging and carding the extending positions of the steel strand anchoring sections, so that the extending positions of the steel strand anchoring sections of the two opposite composite beams do not get the way of the frame, the mutual collision of the steel strands during the installation of the prefabricated composite beam and the confusion of overlapping and overlapping of the steel strands can be effectively avoided, the installation of the prefabricated composite beam is facilitated, the effective contact and wrapping effect of the steel strand anchoring sections and the beam column joint concrete are ensured, and the anchoring effect of the steel strands is improved.
2. According to the anchoring method and structure of the pre-tensioned prefabricated composite beam steel strands at the beam column nodes, the steel strand anchoring sections can extend into the beam column nodes to be longer and extend to opposite composite beam sides basically because the merging and carding of the steel strand anchoring positions are carried out, so that the problem that the anchoring length of the pre-tensioned prefabricated composite beam steel strands is insufficient is effectively solved.
3. According to the anchoring method and structure for the pre-tensioned prefabricated superposed beam steel strands at the beam column joints, the additional stirrups are additionally arranged at the positions of the steel strands, and are effectively bound with all the steel strand anchoring sections, so that a binding lap joint relationship is formed between the opposite superposed beam anchoring steel strands, the anchoring effect of the steel strand anchoring sections is enhanced, meanwhile, due to the additional composite stirrups, the steel strand anchoring sections are well restrained, the anchoring effect of the steel strand anchoring sections is enhanced, and the anchoring capability of the steel strands is further enhanced due to the two effects.
4. The anchoring method and the structure of the pretensioned prefabricated superposed beam steel strand at the beam column joint are simple and feasible, and common workers can operate the anchoring method and the structure of the steel strand anchoring section, and the used material tool is also a common object in engineering, so the method and the structure are beneficial to popularization and use.
[ description of the drawings ]
Fig. 1 is a top view of an anchoring structure of a pretensioned prefabricated composite beam steel strand at a beam-column joint according to the present invention.
Fig. 2 is a side view of one of the composite beams of fig. 1.
[ detailed description ] of the invention
Referring to fig. 1 and 2 of the specification, the invention discloses an anchoring structure of a pre-tensioned prefabricated superposed beam steel strand at a beam-column joint, which consists of a column 1, a superposed beam 2 and other parts.
Wherein, a circle of vertical steel bars 11 extend from the top of the column 1.
The beams 2 are placed on the columns 1 and are arranged in pairs opposite to each other. The end of the superposed beam 2 extends to a steel strand anchoring section 3. Two adjacent rows of steel strand anchoring sections 3 of one superposed beam 2 are twisted together in pairs through steel wires 4. The first row of steel strand anchoring sections 3 of the other laminated beam 2 remain, and the other two adjacent rows of steel strand anchoring sections 3 are twisted together in pairs through steel wires 4.
In this embodiment, the length of the steel strand anchoring section 3 is 50mm smaller than the length of the column 1 in the same direction.
The steel strand anchoring section 3 is fixed together through a steel wire 4 and a plurality of composite stirrups 5. The composite stirrup 5 is provided with 3 to 4 channels. A vertical steel bar 11 passes between twisted steel strand anchoring sections 3.
The anchoring method of the pretensioned prefabricated superposed beam steel strand at the beam column node comprises the following process steps:
1) The steel strand anchoring sections 3 of two prefabricated composite beams 2 which extend into the same column 1 and are opposite in the same direction are arranged in the extending direction. Specifically, the steel strand anchoring section 3 on one of the laminated beams 2 starts from a first row of steel strands at one side, the first row of steel strands and a second row of steel strands are twisted and hinged together through steel wires 4, are combined to form a row, and are analogized to each two rows to form a row; then the steel strand anchoring section 3 on the other composite beam 2 starts from the second row of steel strands on the same side, the second row of steel strands and the third row of steel strands are hinged together through the vertical steel wires 4, are combined to form a row, and are analogized to each two rows to form a row.
2) A plurality of composite stirrups 5 are arranged for the steel strand anchoring sections 3 from the inner sides of the vertical steel bars 11 of the columns 1, and the steel strand anchoring sections 3 and the composite stirrups 5 are fixed together by steel wires 4.
In this embodiment, the steel wire 4 has a specification not less than 18#, and a length greater than a distance between the uppermost steel strand and the lowermost steel strand; when binding, the steel wires 4 are enclosed to form two rows of steel strands which are needed to be combined, the wire binding openings are screwed with tools, and then the tools are used for screwing between every two rows of steel strands, so that the two rows of adjacent steel strands are close together.
In the step 2, the steel strand anchoring sections 3 are combined by the steel wires 4 from the position 50mm away from the inner side of the vertical steel bars 11 of the column 1.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, but any modifications, equivalent substitutions, improvements, etc. within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (5)
1. The anchoring method of the pretensioned prefabricated superposed beam steel strand at the beam column node is characterized by comprising the following steps: the method comprises the following process steps:
1) Arranging the extending direction of the steel strand anchoring sections of two prefabricated superposed beams which extend into the same column and are opposite in the same direction; specifically, the steel strand anchoring section on one of the laminated beams starts from a first row of steel strands at one side, the first row of steel strands and a second row of steel strands are twisted together through steel wires, are combined to form a row, and are analogized to each two rows to form a row; then, starting from a second row of steel strands at the same side, hinging the second row of steel strands and a third row of steel strands together through vertical steel wires, combining to form a row, and analogizing to form a row from every two rows;
2) And a plurality of composite stirrups are arranged for the steel strand anchoring sections from the inner sides of the vertical steel bars of the columns, and the steel strand anchoring sections and the composite stirrups are fixed together by steel wires.
2. The anchoring method of the pretensioned prefabricated superposed beam steel strand at the beam-column joint according to claim 1, wherein: the length of the steel strand anchoring section is 50mm smaller than the length of the column in the same direction.
3. The anchoring method of the pretensioned prefabricated superposed beam steel strand at the beam-column joint according to claim 1, wherein: the steel wire specification is not less than 18#, and the length of the steel wire is greater than the distance between the uppermost steel strand and the lowermost steel strand; when binding, the steel wires are bound to two rows of steel strands which are needed to be combined, the steel wire openings are screwed with tools, and then the tools are used for screwing between every two rows of steel strands, so that the two rows of adjacent steel strands are close together.
4. The anchoring method of the pretensioned prefabricated superposed beam steel strand at the beam-column joint according to claim 1, wherein: the steel strand anchoring sections are combined by the steel wires from the position 50mm away from the inner side of the vertical steel bar of the column.
5. The utility model provides an anchor structure of pretensioned prefabricated coincide beam steel strand wires at beam column node which characterized in that: comprises a post and a superposed beam; wherein, a circle of vertical steel bars extend from the top of the column; the superposed beams are arranged on the posts and are oppositely arranged in pairs; the end part of the superposed beam extends to form a steel strand anchoring section; adjacent two rows of steel strand anchoring sections of one superposed beam are twisted together by steel wires in pairs; the first row of steel strand anchoring sections of the other superposed beam are remained, and the other two adjacent rows of steel strand anchoring sections are twisted and hinged together by steel wires; the steel strand anchoring section is fixed together through steel wires and a plurality of composite stirrups;
a vertical steel bar passes through the twisted steel strand anchoring sections;
the composite stirrup is provided with 3 to 4 channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910070679.4A CN109680808B (en) | 2019-01-25 | 2019-01-25 | Method and structure for anchoring pre-tensioning prefabricated superposed beam steel strands at beam column joints |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910070679.4A CN109680808B (en) | 2019-01-25 | 2019-01-25 | Method and structure for anchoring pre-tensioning prefabricated superposed beam steel strands at beam column joints |
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| CN109680808A CN109680808A (en) | 2019-04-26 |
| CN109680808B true CN109680808B (en) | 2023-09-12 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088920A (en) * | 2013-02-21 | 2013-05-08 | 华汇工程设计集团股份有限公司 | Pre-tensioning prestressed composite beam structural system and construction method thereof |
| CN209817123U (en) * | 2019-01-25 | 2019-12-20 | 华汇工程设计集团股份有限公司 | Anchoring structure of pre-tensioning method prefabricated superposed beam steel strand at beam column node |
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- 2019-01-25 CN CN201910070679.4A patent/CN109680808B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088920A (en) * | 2013-02-21 | 2013-05-08 | 华汇工程设计集团股份有限公司 | Pre-tensioning prestressed composite beam structural system and construction method thereof |
| CN209817123U (en) * | 2019-01-25 | 2019-12-20 | 华汇工程设计集团股份有限公司 | Anchoring structure of pre-tensioning method prefabricated superposed beam steel strand at beam column node |
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| CN109680808A (en) | 2019-04-26 |
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