CN106760054B - Prefabricated reinforced concrete shear wall - Google Patents
Prefabricated reinforced concrete shear wall Download PDFInfo
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- CN106760054B CN106760054B CN201710116546.7A CN201710116546A CN106760054B CN 106760054 B CN106760054 B CN 106760054B CN 201710116546 A CN201710116546 A CN 201710116546A CN 106760054 B CN106760054 B CN 106760054B
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- shear wall
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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
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/18—Spacers of metal or substantially of metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention provides a prefabricated reinforced concrete shear wall which comprises an upper section of shear wall and a lower section of shear wall, wherein a sleeve joint is embedded in the upper section of shear wall, an exposed section bar is embedded in the lower section of shear wall, the section bar is adapted to penetrate into the sleeve joint and is grouted in the sleeve joint, and then the upper section of shear wall and the lower section of shear wall are connected with each other. The invention solves the problems of difficult insertion and difficult centering of the reinforcing steel bars by improving the 'dispersed connection mode' of the reinforcing steel bars into the 'concentrated connection mode' of the section steel, and further provides the construction connection efficiency.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, and particularly relates to a prefabricated reinforced concrete shear wall.
Background
Compared with a cast-in-place concrete structure, the prefabricated concrete structure has the characteristics of low resource consumption, low environmental influence and high labor productivity, has remarkable economic and social benefits, and is the development direction of the current building industrialized construction in China. Like cast-in-place shear wall structures and frame-shear walls, prefabricated shear wall structures are suitable for high-rise residences, while prefabricated frame-shear walls are suitable for office and mall rooms. For the horizontal joint of the prefabricated shear wall, two key technical problems need to be solved: vertical steel bar connection and horizontal seam connection.
The mainstream horizontal joint part connecting technology of the prefabricated assembled concrete shear wall in China at present comprises the following steps: the steel bar sleeve is connected by grouting, the steel bar metal corrugated pipe grout anchor is lapped, the spiral stirrup restrains the steel bar grout anchor, and the steel bar is anchored on the laminated wall body and the like.
In consideration of the current construction technical level and the quality of workers in China, the problem of difficulty in inserting and centering steel bars in construction always exists. Generally, in practice, the improvement methods of "long wall column → segmental short wall column, thin steel bar → thick steel bar, double-row bar → single-row bar" are usually adopted. However, such a method inevitably brings a series of technical defects of increasing cast-in-place vertical seams, reducing construction efficiency, losing the out-of-plane rigidity of the wall body and the like. And even for the common wall limb which is about 3 meters and does not contain the hidden column at the end part, about 8 vertical steel bars are still arranged. If the end hidden columns are included, the number of the steel bars is larger. There are considerable difficulties in rebar insertion and centering. If so, the position of the steel bar is corrected by heating the steel bar. Moreover, the steel bars are directly sawed off, so that huge hidden danger is brought to the house safety.
Therefore, the research and development of the vertical steel bar connection technology with reasonable stress and convenient construction have important significance for accelerating the development of the prefabricated reinforced concrete structure in China.
Disclosure of Invention
In order to overcome the defects in the prior art, the prefabricated reinforced concrete shear wall is provided, the 'dispersed connection mode' of the reinforcing steel bars is improved into the 'concentrated connection mode' of the profile steel, so that the problems of difficulty in inserting and centering of the reinforcing steel bars are solved, and the construction connection efficiency is further improved.
In order to achieve the above purpose, the solution of the invention is as follows: the prefabricated reinforced concrete shear wall comprises an upper section of shear wall and a lower section of shear wall, wherein a socket joint piece is embedded in the upper section of shear wall, a profile exposed outside is embedded in the lower section of shear wall, the profile is adapted to penetrate into the socket joint piece and is grouted in the socket joint piece, and then the upper section of shear wall and the lower section of shear wall are connected with each other.
Preferably, a joint is left between the upper section of the shear wall and the lower section of the shear wall, and the joint is filled through the grouting.
Preferably, the slurry adopted by the grouting and the slurry filling is a cement-based material with high strength, rapid hardening, micro expansion and large fluidity. And then the stress transmission between the upper section of shear wall and the lower section of shear wall is realized through the grouting connection of the profile steel sleeve and the slurry filling of the horizontal joint.
Preferably, the seam is a horizontal seam, and a shear-resistant steel plate is additionally arranged in the middle of the seam.
Preferably, grouting holes are respectively formed in two ends of the socket piece.
Preferably, embedded steel bars are arranged in the upper section shear wall and the lower section shear wall, the sleeve joint piece is in lap joint with the embedded steel bars of the upper section shear wall, and the section bar is in lap joint with the embedded steel bars of the lower section shear wall.
Preferably, the embedded steel bars comprise vertical steel bars and horizontal steel bars which are distributed along the appearance of the shear wall, and the sleeve joint piece and the section bar are respectively lapped with the vertical steel bars in the respective shear wall.
Preferably, the socket piece and the section bar are respectively connected with the vertical steel bars in an overlapped range through stirrups in a reinforcing manner. Therefore, the effect of the lap joint is enhanced by encryption.
Preferably, shear resistant pieces are welded to the surfaces of the socket and the profile to increase the shear resistance of the respective members.
Preferably, the socket surface has a plurality of annular friction ribs.
Preferably, the exposed end of the profile is provided with a circular baffle.
Preferably, the socket piece is a sleeve, and the section bar is profile steel.
The prefabricated reinforced concrete shear wall has the beneficial effects that:
1) The construction is convenient and efficient. The vertical steel bar connecting method provided by the invention only needs to insert the two section steels into the corresponding sleeves respectively and then grout the two sleeves, and has low inserting and centering difficulty and high grouting efficiency. The existing method is that a plurality of steel bars on the lower section of the shear wall are respectively inserted into respective sleeves at one time and then grouted one by one, so that the inserting and centering difficulty is high, and the grouting efficiency is low;
2) The stress is reasonable. Compared with steel bar sleeve grouting and slurry anchor connection, the shear wall has higher stress efficiency under the action of bending moment, and does not influence the inclined shearing and direct shearing capacities. The section steel replaces the reinforcing steel bars and is intensively arranged at the two ends of the shear wall, when the bending moment is generated, the section steel which is pulled is far away from the neutral axis, and compared with a uniform arrangement method of the reinforcing steel bars along the length of the shear wall, the stress is more reasonable. The inclined shear resistance and the direct shear resistance are not changed due to the stress mechanism, so the bearing capacity is not reduced;
3) The function of the sleeve is fully utilized. The sleeve has two functions, namely a conventional function, namely the sleeve is used as a part of grouting connection, and when the section steel is pulled, the sleeve has a strong constraint effect on the grouting material and the section steel in the sleeve. And secondly, when the grouting connection is in a pressed state, the sleeve can restrict the internal grouting material, so that the pressed bearing capacity of the sleeve is improved. In contrast, in the existing steel bar grouting connection or steel bar anchoring grout connection, since part of the steel bar grouting connection or steel bar anchoring grout connection is located in the middle of the section of the shear wall, the second function of the present application is not fully exerted.
Drawings
FIG. 1 is a schematic view of an overall exploded structure of a prefabricated reinforced concrete shear wall according to the present invention;
FIG. 2 isbase:Sub>A schematic cross-sectional view of the upper shear wall A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the lower section of the shear wall B-B of FIG. 1;
fig. 4 is a schematic structural view of the inner wall of the sleeve in fig. 1.
Wherein: 1-lower section shear wall, 2-upper section shear wall, 3-vertical reinforcing steel bar in the lower section shear wall, 4-shaped steel, 5-sleeve, 6-vertical reinforcing steel bar in the upper section shear wall, 7-stirrup of restraint shaped steel and vertical reinforcing steel bar in the lower section shear wall, 8-stirrup of restraint sleeve and vertical reinforcing steel bar in the upper section shear wall, 9-horizontal reinforcing steel bar in the lower section shear wall, 10-horizontal reinforcing steel bar in the upper section shear wall, 11-baffle, 12-annular friction rib.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings.
As shown in fig. 1, the invention firstly provides a prefabricated reinforced concrete shear wall, which comprises an upper section of shear wall 2 and a lower section of shear wall 1, and the reliability of the stress of the vertical steel bars of the wall body is continuous through three-section connection, namely, the vertical steel bars in the lower section of shear wall are lapped with the section steel, the section steel sleeves are connected in a grouting manner, and the sleeves are lapped with the vertical steel bars in the upper section of shear wall. Wherein, shaped steel 4 is pre-buried in lower segment shear wall and is located two tip, and sleeve 5 is pre-buried in upper segment shear wall and is located two tip. The profile steel 4 corresponds to the position of the sleeve 5.
Specifically, both ends of the lower section shear wall 1 are respectively embedded with a section steel 4. The section steel 4 is exposed out of a section anchoring length of the surface of the shear wall, and the end part is provided with a baffle plate 11 to increase the anti-pulling-out capacity between the section steel 4 and the sleeve 5. Two ends of the upper section shear wall 2 are respectively embedded with a sleeve 5. During assembly, the upper section shear wall 2 is slowly put down, and the section steel 4 is inserted into the sleeve 5. The distance between the horizontal joints of the upper shear wall and the lower shear wall is kept at 20mm. The seam is surrounded by a barrier. The grout is then injected into the sleeve 5. Part of grouting material can automatically settle at the lower part of the upper section of the shear wall and fill horizontal joints to form floating slurry, and the floating slurry is used for resisting horizontal shear after being solidified and hardened.
As shown in fig. 2, the sleeve 5 is lapped with the vertical steel bar 6 in the upper section of the shear wall 2, and the lapping range is restrained by the stirrup 8. Horizontal reinforcing bars 10 are also arranged in the upper section shear wall 2.
As shown in FIG. 3, the section steel 4 and the vertical steel bar 3 in the lower section shear wall 1 are restrained by stirrups 7 in the overlapping range. Horizontal steel bars 9 are also arranged in the lower section shear wall 1.
As shown in fig. 4, the sleeve has a plurality of annular friction ribs 12 on the surface thereof, and the annular friction rib structures distributed at regular intervals help to increase the adhesion between the external concrete and the outer surface of the sleeve 5 and between the internal grouting material and the inner surface of the sleeve 5, thereby increasing the reliability of the stress.
Preferably, the section shape of the section steel 4 may be H-shaped or T-shaped, or may be other open thin-walled shapes. The section steel 4 may also be a closed thin-walled member, such as a steel tube. The sleeve 5 is made of an industrial seamless steel pipe which is surface-processed into a plurality of ribs. Two small holes are arranged on the wall surface of the sleeve 5 at the positions close to the upper end and the lower end, so that grouting and grout discharging are facilitated. The grouting and the slurry filling adopt slurry which is a cement-based material with high strength, rapid hardening, micro expansion and large fluidity. And then the stress transmission between the upper section of shear wall and the lower section of shear wall is realized through the grouting connection of the profile steel sleeve and the slurry filling of the horizontal joint. Further, all surfaces of the section steel 4 and the steel pipe sleeve 5 are welded with U-shaped shear members to increase the shear resistance of the respective members. And when the section steel 4 is lapped with the steel bar and the sleeve 5 is lapped with the steel bar, the adopted length meets the requirement of the lapping length of the steel bar. The stirrup is additionally arranged in the overlap length range, the distance between the stirrups is small (for example, 50mm is adopted) so as to ensure reliable overlap stress and enhance the effect of overlap joint.
In practical applications, the H-section steel in fig. 1 may be replaced with T-section steel (expanded form 1 in the table), or with steel pipe (expanded form 2 in the table), as shown in the following table. In addition, when the horizontal joint has insufficient resistance to horizontal shearing force, a shear steel plate (such as an expansion form 3 in the table) can be added in the middle of the section of the shear wall. Meanwhile, when the shear wall has insufficient bending resistance, two section steels and corresponding sleeves (such as the expanded form 4 in the table) can be arranged at each end of the shear wall. Of course, the extended form is not limited to the forms 1 to 4 in the table.
After the implementation process is completed, the following characteristics of the invention can be embodied:
1) The existing shear wall connection mode of inserting the steel bars into the sleeves is improved, so that the inserting and centering difficulty in construction is low, and the grouting efficiency is high;
2) The connecting structure between the sleeve and the section bar has the advantages that the stress is more reasonable, and the utilization efficiency is higher;
3) The components used in the invention are all common in building construction and can be obtained from local materials.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (1)
1. The utility model provides a prefabricated reinforced concrete shear force wall which characterized in that: the concrete pile comprises an upper section of shear wall and a lower section of shear wall, wherein a sleeve joint part is embedded in the upper section of shear wall, a profile exposed outside is embedded in the lower section of shear wall, the profile is adapted to penetrate into the sleeve joint part and is grouted in the sleeve joint part, and then the upper section of shear wall and the lower section of shear wall are connected with each other; embedded steel bars are arranged in the upper section shear wall and the lower section shear wall, the sleeve joint part is in lap joint with the embedded steel bars of the upper section shear wall, the section bar is in lap joint with the embedded steel bars of the lower section shear wall, the embedded steel bars comprise vertical steel bars and horizontal steel bars which are distributed along the appearance of the shear wall, and the sleeve joint part and the section bar are in lap joint with the vertical steel bars in the shear walls respectively;
the sleeve is a sleeve, the section is profile steel, the profile steel is embedded in the lower section of the shear wall and is positioned at two end parts, the sleeve is embedded in the upper section of the shear wall and is positioned at two end parts, the profile steel corresponds to the sleeve in position, and U-shaped shearing resistant parts are welded on all surfaces of the section steel and the sleeve;
a joint is reserved between the upper section of shear wall and the lower section of shear wall, the joint is filled through the grouting, the joint is a horizontal joint, and a shear-resistant steel plate is additionally arranged in the middle of the joint;
the inner wall of the sleeve joint piece is provided with a plurality of annular friction ribs, the annular friction rib structures distributed at equal intervals are beneficial to increasing external concrete and the bonding effect between the outer surface of the sleeve joint piece and the inner grouting material and the inner surface of the sleeve joint piece, the end part of the sleeve joint piece is provided with a grouting hole, the sleeve joint piece and the section bar are respectively connected with the inside of the lap joint range of the vertical steel bars in a reinforcing mode through stirrups, and the end part of the section bar exposed outside is provided with a baffle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710116546.7A CN106760054B (en) | 2017-03-01 | 2017-03-01 | Prefabricated reinforced concrete shear wall |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710116546.7A CN106760054B (en) | 2017-03-01 | 2017-03-01 | Prefabricated reinforced concrete shear wall |
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| CN106760054A CN106760054A (en) | 2017-05-31 |
| CN106760054B true CN106760054B (en) | 2023-01-31 |
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| CN107201792A (en) * | 2017-07-17 | 2017-09-26 | 广东省建科建筑设计院有限公司 | High-rise assembled single row of holes precast shear wall and its assembling structure and construction method |
| CN107355010A (en) * | 2017-08-21 | 2017-11-17 | 南京工业大学 | Precast concrete shear wall shaped steel node connection structure |
| CN107882052B (en) * | 2017-10-31 | 2020-07-14 | 万勇 | Prefabricated assembled foundation that sinks of plus building elevator |
| CN108193801A (en) * | 2017-12-29 | 2018-06-22 | 常州工程职业技术学院 | A kind of prefabricated steel tube shear connection structure of service-strong and method |
| CN108343174B (en) * | 2018-02-08 | 2019-08-16 | 天津大学建筑设计研究院 | Fabricated shear wall dry and wet mixed connection method |
| CN109441016B (en) * | 2018-12-20 | 2024-03-22 | 深圳大学 | Assembled concrete structure column steel tube sleeve joint and manufacturing method thereof |
| CN110984430A (en) * | 2019-12-31 | 2020-04-10 | 浙江工业大学 | Assembled concrete shear wall and connecting method thereof |
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