CN111997194A - Fabricated concrete primary and secondary beam structure and dry-type connecting method thereof - Google Patents
Fabricated concrete primary and secondary beam structure and dry-type connecting method thereof Download PDFInfo
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- CN111997194A CN111997194A CN202010975375.5A CN202010975375A CN111997194A CN 111997194 A CN111997194 A CN 111997194A CN 202010975375 A CN202010975375 A CN 202010975375A CN 111997194 A CN111997194 A CN 111997194A
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
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Abstract
The invention provides an assembled concrete primary and secondary beam structure and a dry-type connecting method thereof.A cantilever beam with a notch extends out of one side of a precast concrete main beam, a reinforced bar channel is reserved in the main beam, and an embedded part formed by welding steel plates and bolts is embedded below the notch of the cantilever beam; the prefabricated concrete secondary beam is provided with a secondary beam end gap from top to bottom, a bolt channel is reserved at the connecting end of the secondary beam, and a reinforcing steel bar is reserved at the beam end of the secondary beam; the beam end of the secondary beam is lapped on the notch of the outward extending beam, the bolt of the embedded part penetrates through the bolt channel of the beam end, a steel plate with a bolt through hole is arranged on the beam end, and then the steel plate is fastened by a nut; the connecting piece of the main beam and the secondary beam is formed by welding steel plates and steel bars, and the steel bars penetrate through the steel bar channel of the main beam and then are connected with the reserved steel bars at the beam end through steel bar sleeves. The invention has the advantages that the connection mode adopts dry operation construction, thereby saving energy, protecting environment and simplifying construction; the connection is reliable, the integrity is good, and the rigidity is obviously improved; the industrialization efficiency of the device is obviously improved, and the generalization and standardization can be realized.
Description
Technical Field
The invention belongs to the technical field of assembly type buildings, and particularly relates to an assembly type concrete primary and secondary beam structure and a dry type connecting method thereof.
Background
The prefabricated concrete building is a building with a concrete structure designed and built in a field assembly mode, wherein the prefabricated concrete components are mainly produced in a factory. The assembly method of the component generally comprises a post-cast integral structure, a full-assembly structure connection and the like, and the steel bar connection can adopt methods of sleeve grouting connection, steel bar grout anchor lap joint connection and the like. In the 80 s of the 20 th century, the prefabricated large-plate house popular in China has many hidden dangers and defects influencing the safety and normal use of the structure due to poor structural integrity, leakage, floor slab cracks and the like, and is gradually replaced by a cast-in-place concrete structure. However, with the application of the currently emerging prefabricated concrete structure, especially with the introduction of a plurality of foreign advanced technologies in recent years, a new technology for constructing a native prefabricated concrete structure is gradually formed.
The design and construction technology of the fabricated concrete building is researched from the fifties and sixties of the 20 th century in China, a series of fabricated concrete building systems are formed, and typical building systems comprise a fabricated single-layer industrial factory building system, a fabricated multi-layer frame building system, a fabricated large-plate building system and the like. By the 20 th century and the 80 th century, the application of the fabricated concrete building reaches the full prosperity, and a design, manufacture, construction and installation integrated fabricated concrete industrialized building mode is formed in many places in the country. The fabricated concrete building and the masonry building adopting the prefabricated hollow floor slab become two main building systems, and the application popularization rate reaches more than 70%. Because the function and physical performance of the fabricated building have many limitations and defects, the level of the design and the development of the construction technology of the fabricated concrete building in China cannot keep up with the change of the social demand and the development of the construction technology, and the fabricated concrete building is gradually replaced by a full cast-in-place concrete building system by the middle of the 90 s of the 20 th century. At present, except that the application of an assembly type single-layer industrial factory building system is wider, the engineering application of other prefabricated assembly type building systems is very little. The seismic integrity of the prefabricated structure and the specialized research of design construction management are not enough, so that the poor technical integrity is the root cause of the long-term stagnation state of the prefabricated structure.
Disclosure of Invention
1. The purpose of the invention is as follows:
the invention aims to solve the problems of complex site construction, poor integrity and the like of the existing node, and provides a dry type connection method which is simple in construction and high in shear strength. The method has the advantages of reliable connection, good integrity, excellent shear resistance, obviously improved rigidity, obviously improved industrialization efficiency, and realization of generalization and standardization.
2. The technical scheme adopted by the invention is as follows:
the invention relates to an assembled concrete primary and secondary beam structure and a dry-type connecting method thereof, wherein the assembled concrete primary and secondary beam structure comprises a precast concrete main beam, a precast concrete secondary beam, a connecting piece and a steel plate; an overhanging beam with a notch and the length of not less than 500mm extends out of one side of the precast concrete main beam, a reinforcing steel bar channel is reserved in the precast concrete main beam, is positioned at the intersection of the beam body and the overhanging beam, has the same length direction as the overhanging beam, and penetrates through the beam body, and an embedded part formed by welding an embedded part steel plate and an embedded part bolt is embedded below the notch of the overhanging beam; the precast concrete secondary beam end is lapped on the notch of the overhanging beam, the embedded part bolt passes through the bolt channel of the secondary beam end, and the steel bar at the upper part of the connecting part and the steel bar at the lower part of the connecting part pass through the steel bar channel; the precast concrete secondary beam is provided with a secondary beam end gap, the secondary beam end is encrypted through stirrups, a bolt channel and transverse reserved steel bars are reserved at the connecting end, an embedded part bolt penetrates through the reserved bolt channel at the secondary beam end, the reserved steel bars at the secondary beam end and the connecting piece steel bars are connected together through steel bar sleeves, and the steel bar sleeves are connected with the steel bars through the secondary beam end gap; the connecting piece is formed by welding a connecting piece steel plate, a connecting piece upper portion steel bar and a connecting piece lower portion steel bar, wherein the connecting piece upper portion steel bar and the connecting piece lower portion steel bar are located on one side of the connecting piece steel plate and are perpendicular to the connecting piece steel plate.
Furthermore, the precast concrete girder mainly comprises a precast concrete girder body overhanging beam, a notch, an embedded part, a steel bar channel, a girder stirrup, a girder stressing rib and an overhanging beam stressing rib; the size of the notch is the same as that of the end of the precast concrete secondary beam, the position of the bolt of the embedded part corresponds to that of the bolt channel, and the position of the steel bar channel corresponds to the steel bar at the upper part of the connecting part and the steel bar at the lower part of the connecting part.
Furthermore, the precast concrete secondary beam mainly comprises a precast concrete secondary beam body, a secondary beam end gap, a secondary beam end reserved steel bar, a bolt channel and a secondary beam stirrup; the reserved steel bar position of the secondary beam end corresponds to the steel bar channel.
Furthermore, the connecting piece mainly comprises a connecting piece steel plate, a connecting piece upper reinforcing steel bar and a connecting piece lower reinforcing steel bar; the length of the upper reinforcing steel bar of the connecting piece corresponds to the width of the main beam, and the length of the lower reinforcing steel bar of the connecting piece corresponds to the width of the overhanging beam.
Further, the mounting step is:
(a) the beam end of the precast concrete secondary beam is hoisted and lapped on the notch of the overhanging beam, an embedded part bolt passes through a bolt channel corresponding to the beam end of the secondary beam, a steel plate is arranged on the beam end, and the embedded part bolt passes through a corresponding bolt through hole and is finally fastened by a nut;
(b) the connecting piece reinforcing steel bars respectively pass through the reinforcing steel bar channels corresponding to the concrete main beams, and the reinforcing steel bars at the upper part of the connecting piece, the reinforcing steel bars at the lower part of the connecting piece and the reserved reinforcing steel bars at the beam ends of the secondary beams are connected together by using reinforcing steel bar sleeves at the gaps at the beam ends of the secondary beams.
The invention has the beneficial effects that:
the invention has the advantages that the connection mode adopts dry operation construction, the connecting piece is simple, the simplified construction connection is reliable, the integrity is good, the excellent shearing resistance is realized, the industrialization efficiency is obviously improved, and the generalization and standardization can be realized.
Drawings
FIG. 1 is a three-dimensional schematic diagram of a dry connection of a primary beam and a secondary beam;
FIG. 2 is a three-dimensional schematic view of a precast concrete main beam structure;
FIG. 3 is a three-dimensional schematic diagram of a precast concrete secondary beam structure;
FIG. 4 is a three-dimensional schematic view of an overhanging beam embedded part structure;
FIG. 5 is a three-dimensional schematic view of a steel plate structure;
FIG. 6 is a three-dimensional schematic view of a connector structure;
FIG. 7 is a main beam reinforcement view;
fig. 8 is a secondary beam reinforcement diagram.
In the figure, 1 is a precast concrete girder; 2, precast concrete secondary beams; 3 is a connecting piece; 4 is a steel plate; 1-1 is a precast concrete girder body; 1-2 is an extending beam; 1-3 are notches; 1-4 are embedded parts; 1-4-1 is an embedded part steel plate; 1-4-2 is an embedded part bolt; 1-4-3 is a nut; 1-5 are reinforcing steel bar channels; 1-6 are main beam hoops; 1-7 are main beam stress bars; 1-8 are stress bars of the overhanging beam; 2-1 is a precast concrete secondary beam body; 2-2 is a gap at the end of the secondary beam; 2-3, reserving reinforcing steel bars at the end of the secondary beam; 2-4 are bolt passages; 2-5 is a secondary beam stirrup; 3-1 is a connecting piece steel plate; 3-2 is the upper reinforcing steel bar of the connecting piece; 3-3 is a steel bar at the lower part of the connecting piece; 3-3 is a steel bar sleeve; 4-1 is a bolt through hole.
Detailed Description
In order to further illustrate the present invention, the following detailed description of the present invention is given with reference to the accompanying drawings and examples, which should not be construed as limiting the scope of the present invention.
The method for dry-type connection of the assembled concrete main beam and the secondary beam is shown in figures 1-8. The invention comprises a precast concrete main beam (1), a precast concrete secondary beam (2), a connecting piece (3) and a steel plate (4); an overhanging beam (1-2) with a notch (1-3) and a length not less than 500mm is extended from one side of the precast concrete main beam (1), a reinforcing steel bar channel (1-5) is reserved in the precast concrete main beam (1), the reinforcing steel bar channel (1-5) is positioned at the intersection of the beam body (1-1) and the overhanging beam (1-2), the length direction of the reinforcing steel bar channel is the same as that of the overhanging beam (1-2), the reinforcing steel bar channel penetrates through the beam body (1-1), and an embedded part (1-4) formed by welding an embedded part steel plate (1-4-1) and an embedded part bolt (1-4-2) is embedded below the notch (1-3) of the overhanging beam; the beam end of the precast concrete secondary beam (2) is lapped on a notch (1-3) of the overhanging beam, an embedded part bolt (1-4-2) penetrates through a bolt channel (2-4) of the beam end of the secondary beam, and an upper reinforcing steel bar (3-2) of the connecting piece and a lower reinforcing steel bar (3-3) of the connecting piece penetrate through a reinforcing steel bar channel (1-5); a secondary beam end gap (2-2) is reserved in the precast concrete secondary beam (2), the secondary beam end is encrypted through stirrups, a bolt channel (2-4) and transverse reserved steel bars (2-3) are reserved at the connecting end, an embedded part bolt (1-4-2) penetrates through the reserved bolt channel (2-4) of the secondary beam end, the reserved steel bars (2-3) of the secondary beam end and the connecting piece steel bars (3-2) are connected together through steel bar sleeves (3-3), and the steel bar sleeves (3-3) are connected with the steel bars through the secondary beam end gap (2-2); the connecting piece (3) is formed by welding a connecting piece steel plate (3-1), a connecting piece upper portion steel bar (3-2) and a connecting piece lower portion steel bar (3-3), wherein the connecting piece upper portion steel bar (3-2) and the connecting piece lower portion steel bar (3-3) are located on one side of the connecting piece steel plate (3-1) and are perpendicular to the connecting piece steel plate.
The precast concrete girder (1) mainly comprises a precast concrete girder body (1-1), an overhanging girder (1-2), a notch (1-3), an embedded part (1-4), a steel bar channel (1-5), a girder hoop (1-6), a girder stress bar (1-7) and an overhanging girder stress bar (1-8); the size of the notch (1-3) is the same as that of the beam end of the precast concrete secondary beam (2), the position of the embedded part bolt (1-4-2) corresponds to the bolt channel (2-4), and the position of the steel bar channel (1-5) corresponds to the steel bar (3-2) at the upper part of the connecting piece and the steel bar (3-3) at the lower part of the connecting piece.
The precast concrete secondary beam (2) mainly comprises a precast concrete secondary beam body (2-1), a secondary beam end gap (2-2), a secondary beam end reserved steel bar (2-3), a bolt channel (2-4) and a secondary beam stirrup (2-5); the positions of the reserved steel bars (2-3) at the ends of the secondary beam correspond to the positions of the steel bar channels (1-5).
The connecting piece (3) mainly comprises a connecting piece steel plate (3-1), a connecting piece upper reinforcing steel bar (3-2) and a connecting piece lower reinforcing steel bar (3-3); the length of the upper reinforcing steel bar (3-2) of the connecting piece corresponds to the width of the main beam, and the length of the lower reinforcing steel bar (3-3) of the connecting piece corresponds to the width of the overhanging beam.
The installation steps are as follows:
(a) the beam end of a precast concrete secondary beam (2) is hoisted and lapped on a notch (1-3) of an overhanging beam (1-2), an embedded part bolt (1-4-2) penetrates through a bolt channel (2-4) corresponding to the beam end of the secondary beam, a steel plate (4) is arranged on the beam end, the embedded part bolt (1-4-2) penetrates through a corresponding bolt through hole (4-1), and finally the embedded part bolt is fastened by a nut (1-4-3);
(b) the connecting piece steel bars (3-2) respectively penetrate through the steel bar channels (1-5) corresponding to the concrete main beam, and the steel bar sleeves (3-3) are used for connecting the upper steel bars (3-2) of the connecting piece, the lower steel bars (3-3) of the connecting piece and the reserved steel bars (2-3) at the secondary beam end at the gap (2-2) at the secondary beam end.
Claims (5)
1. An assembled concrete primary and secondary beam structure and a dry-type connecting method thereof are characterized in that: the prefabricated concrete secondary beam comprises a prefabricated concrete main beam (1), a prefabricated concrete secondary beam (2), a connecting piece (3) and a steel plate (4); an overhanging beam (1-2) with a notch (1-3) and a length not less than 500mm is extended from one side of the precast concrete main beam (1), a reinforcing steel bar channel (1-5) is reserved in the precast concrete main beam (1), the reinforcing steel bar channel (1-5) is positioned at the intersection of the beam body (1-1) and the overhanging beam (1-2), the length direction of the reinforcing steel bar channel is the same as that of the overhanging beam (1-2), the reinforcing steel bar channel penetrates through the beam body (1-1), and an embedded part (1-4) formed by welding an embedded part steel plate (1-4-1) and an embedded part bolt (1-4-2) is embedded below the notch (1-3) of the overhanging beam; the beam end of the precast concrete secondary beam (2) is lapped on a notch (1-3) of the overhanging beam, an embedded part bolt (1-4-2) penetrates through a bolt channel (2-4) of the beam end of the secondary beam, and an upper reinforcing steel bar (3-2) of the connecting piece and a lower reinforcing steel bar (3-3) of the connecting piece penetrate through a reinforcing steel bar channel (1-5); a secondary beam end gap (2-2) is reserved in the precast concrete secondary beam (2), the secondary beam end is encrypted through stirrups, a bolt channel (2-4) and transverse reserved steel bars (2-3) are reserved at the connecting end, an embedded part bolt (1-4-2) penetrates through the reserved bolt channel (2-4) of the secondary beam end, the reserved steel bars (2-3) of the secondary beam end and the connecting piece steel bars (3-2) are connected together through steel bar sleeves (3-3), and the steel bar sleeves (3-3) are connected with the steel bars through the secondary beam end gap (2-2); the connecting piece (3) is formed by welding a connecting piece steel plate (3-1), a connecting piece upper portion steel bar (3-2) and a connecting piece lower portion steel bar (3-3), wherein the connecting piece upper portion steel bar (3-2) and the connecting piece lower portion steel bar (3-3) are located on one side of the connecting piece steel plate (3-1) and are perpendicular to the connecting piece steel plate.
2. The fabricated concrete primary and secondary girder structure and the dry type connecting method thereof according to claim 1, wherein: the precast concrete girder (1) mainly comprises a precast concrete girder body (1-1), an overhanging girder (1-2), a notch (1-3), an embedded part (1-4), a steel bar channel (1-5), a girder hoop (1-6), a girder stress bar (1-7) and an overhanging girder stress bar (1-8); the size of the notch (1-3) is the same as that of the beam end of the precast concrete secondary beam (2), the position of the embedded part bolt (1-4-2) corresponds to the bolt channel (2-4), and the position of the steel bar channel (1-5) corresponds to the steel bar (3-2) at the upper part of the connecting piece and the steel bar (3-3) at the lower part of the connecting piece.
3. The fabricated concrete primary and secondary girder structure and the dry type connecting method thereof according to claim 1, wherein: the precast concrete secondary beam (2) mainly comprises a precast concrete secondary beam body (2-1), a secondary beam end gap (2-2), a secondary beam end reserved steel bar (2-3), a bolt channel (2-4) and a secondary beam stirrup (2-5); the positions of the reserved steel bars (2-3) at the ends of the secondary beam correspond to the positions of the steel bar channels (1-5).
4. The fabricated concrete primary and secondary girder structure and the dry type connecting method thereof according to claim 1, wherein: the connecting piece (3) mainly comprises a connecting piece steel plate (3-1), a connecting piece upper reinforcing steel bar (3-2) and a connecting piece lower reinforcing steel bar (3-3); the length of the upper reinforcing steel bar (3-2) of the connecting piece corresponds to the width of the main beam, and the length of the lower reinforcing steel bar (3-3) of the connecting piece corresponds to the width of the overhanging beam.
5. The fabricated concrete primary and secondary beam structure and the dry-type connecting method thereof according to claim 1, wherein the installing step is:
(a) the beam end of a precast concrete secondary beam (2) is hoisted and lapped on a notch (1-3) of an overhanging beam (1-2), an embedded part bolt (1-4-2) penetrates through a bolt channel (2-4) corresponding to the beam end of the secondary beam, a steel plate (4) is arranged on the beam end, the embedded part bolt (1-4-2) penetrates through a corresponding bolt through hole (4-1), and finally the embedded part bolt is fastened by a nut (1-4-3);
(b) the connecting piece steel bars (3-2) respectively penetrate through the steel bar channels (1-5) corresponding to the concrete main beam, and the steel bar sleeves (3-3) are used for connecting the upper steel bars (3-2) of the connecting piece, the lower steel bars (3-3) of the connecting piece and the reserved steel bars (2-3) at the secondary beam end at the gap (2-2) at the secondary beam end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010975375.5A CN111997194A (en) | 2020-09-16 | 2020-09-16 | Fabricated concrete primary and secondary beam structure and dry-type connecting method thereof |
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| CN202010975375.5A CN111997194A (en) | 2020-09-16 | 2020-09-16 | Fabricated concrete primary and secondary beam structure and dry-type connecting method thereof |
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| CN111997194A true CN111997194A (en) | 2020-11-27 |
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| CN202010975375.5A Pending CN111997194A (en) | 2020-09-16 | 2020-09-16 | Fabricated concrete primary and secondary beam structure and dry-type connecting method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627415A (en) * | 2021-01-29 | 2021-04-09 | 河南聚誉帆工程技术咨询有限公司 | Assembled integral floor connecting device |
| CN112922227A (en) * | 2021-01-27 | 2021-06-08 | 海南大学 | Assembly type concrete main beam and secondary beam joint and construction method thereof |
| CN114263272A (en) * | 2021-12-23 | 2022-04-01 | 泰州职业技术学院 | Prefabricated assembly type main beam and secondary beam connecting device based on BIM and installation method |
| WO2023036211A1 (en) * | 2021-09-08 | 2023-03-16 | 南通职业大学 | Construction process for dry full-assembly industrial concrete primary and secondary beam nodes |
-
2020
- 2020-09-16 CN CN202010975375.5A patent/CN111997194A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922227A (en) * | 2021-01-27 | 2021-06-08 | 海南大学 | Assembly type concrete main beam and secondary beam joint and construction method thereof |
| CN112627415A (en) * | 2021-01-29 | 2021-04-09 | 河南聚誉帆工程技术咨询有限公司 | Assembled integral floor connecting device |
| WO2023036211A1 (en) * | 2021-09-08 | 2023-03-16 | 南通职业大学 | Construction process for dry full-assembly industrial concrete primary and secondary beam nodes |
| CN114263272A (en) * | 2021-12-23 | 2022-04-01 | 泰州职业技术学院 | Prefabricated assembly type main beam and secondary beam connecting device based on BIM and installation method |
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