CN206408743U - A kind of assembly concrete node - Google Patents

Abstract

The utility model provides an assembled concrete node, which comprises a prefabricated stepped concrete beam and a prefabricated concrete column with an extended stepped beam; the prefabricated concrete column with an extended stepped beam includes an upper column, a beam end, a lower ladder connecting frame, an upper Ladder connecting frame, arc-shaped mounting opening and lower column; the beam end includes a ladder opening, a lower ladder beam, and an upper ladder beam; an upper ladder beam is fixedly connected under the upper column; Both ends of the stepped beam protrude between 200mm-300mm of the lower column, and both ends of the lower stepped beam protrude between 400mm-500mm of the upper column; the lower stepped beam at one end and the upper stepped beam at one end form a step mouth, The heights of the lower ladder beam and the upper ladder beam are set to be equal; the upper end of the upper ladder beam is provided with an upper ladder connecting frame, and the lower end of the lower ladder beam is provided with a lower ladder connecting frame; the seismic performance is strong, and the stiffness is significantly improved.

Description

A prefabricated concrete node

technical field

The utility model belongs to the technical field of construction, in particular to an assembled concrete node and a dry connection method thereof.

Background technique

Prefabricated concrete buildings refer to prefabricated concrete components produced in factories. Concrete structure housing buildings designed and constructed through on-site assembly. The assembly methods of components generally include on-site post-casting laminated layer concrete, steel bar anchoring and post-casting concrete connection, etc. The steel bar connection can be connected by sleeve grouting connection, welding, mechanical connection and lap connection of reserved holes. In the 1980s, prefabricated prefabricated large-slab houses, which were popular in my country, had many hidden dangers and defects that affected structural safety and normal use due to poor structural integrity, leakage, and floor cracks, and were gradually replaced by cast-in-place concrete structures. . However, with the current emerging application of prefabricated concrete structures, especially the introduction of many foreign advanced technologies in recent years, localized new technologies for the construction of prefabricated concrete structures are gradually forming.

With the acceleration of the process of "construction industrialization and housing industrialization" in China and the continuous reduction of China's "demographic dividend" and the emergence of labor shortages in the construction industry, the trend of housing industrialization is becoming more and more obvious. The application of prefabricated concrete structures has become a current research hotspot again, and new technologies and new forms of prefabricated concrete structures for residential buildings are emerging all over the country. Prefabricated reinforced concrete structure is one of the important directions for the development of my country's building structure. It is conducive to the development of my country's building industrialization, improving production efficiency and saving energy, developing green and environmentally friendly buildings, and is conducive to improving and ensuring the quality of construction projects. Compared with the cast-in-place construction method, the prefabricated RC structure is conducive to green construction, because the prefabricated construction can better meet the requirements of green construction, such as land saving, energy saving, material saving, water saving and environmental protection, and reduce the negative impact on the environment. Including reducing noise, preventing dust, reducing environmental pollution, clean transportation, reducing site disturbance, saving water, electricity, materials and other resources and energy, and following the principles of sustainable development. Moreover, the prefabricated structure can continuously complete multiple or all processes of the project in sequence, thereby reducing the types and quantities of construction machinery entering the site, eliminating the idle time between process connections, realizing three-dimensional cross operations, reducing construction personnel, and improving work efficiency , Reduce material consumption, reduce environmental pollution, and provide guarantee for green construction. In addition, the prefabricated structure can reduce construction waste to a large extent (accounting for about 30%-40% of the total urban waste), such as waste steel bars, waste iron wires, waste bamboo wood, waste concrete, etc.

Prefabricated concrete buildings can be divided into two categories: full assembly and partial assembly according to the degree of assembly. Fully assembled buildings are generally limited to low-rise or multi-storey buildings with low seismic fortification requirements; the main components of partially assembled concrete buildings are generally prefabricated components, which are connected by cast-in-place concrete on site to form a building with an assembled monolithic structure.

North America is mainly dominated by the United States and Canada. Due to the long-term research and promotion of precast buildings by the Precast/Prestressed Concrete Association (PCI), the relevant standards and specifications for precast concrete are also very complete. Therefore, its prefabricated concrete building application is very common. Prefabricated buildings in North America mainly include two series of building prefabricated exterior walls and structural prefabricated components. The common feature of prefabricated components is the combination of large-scale and prestress. Structural reinforcement and connection construction can be optimized. Reduce the workload of production and installation, shorten the construction period, and fully reflect the characteristics of industrialization, standardization and technical economy. In the 20th century, prefabricated buildings in North America were mainly used in low-rise non-seismic fortified areas. Due to the impact of earthquakes in the California area, in recent years, great attention has been paid to the research on engineering application technology of earthquake resistance and mid-high-rise prefabricated structures. PCI recently published the book "Seismic Design of Prefabricated Concrete Structures", which systematically analyzes the seismic design of prefabricated buildings from the perspective of theory and practice, and summarizes the latest scientific research achievements in the seismic design of prefabricated structures. Promotion has a strong guiding significance.

Europe is the birthplace of prefabricated buildings, and the road to industrialization of buildings began as early as the 17th century. After the Second World War, due to the shortage of labor resources, Europe further studied and explored the industrialization model of construction. Whether it is economically developed Northern Europe, Western Europe, or economically underdeveloped Eastern Europe, they have been actively promoting the design and construction of prefabricated concrete buildings. Accumulated a lot of experience in the design and construction of prefabricated buildings, formed various special prefabricated building systems and standardized general prefabricated product series, and compiled a series of precast concrete engineering standards and application manuals, which played a role in promoting the application of precast concrete in the world very important role.

Japan and South Korea have learned from the successful experience of Europe and the United States, on the basis of exploring the standardized design and construction of prefabricated buildings. Combined with their own requirements. Breakthroughs have been made in the integral seismic and isolation design of prefabricated structural systems. Representative achievements are the two 58-story Tokyo Towers built in Japan in 2008 using prefabricated frame structures. At the same time, the standard specifications for the design, production and construction of precast concrete building systems in Japan are also very complete. The prefabricated specifications currently in use include "Precast Concrete Engineering" (JASSl0) and "Concrete Curtain Wall) (JASSl4).

my country began to study the design and construction technology of prefabricated concrete buildings in the 1950s and 1960s, and formed a series of prefabricated concrete building systems. The more typical building systems include prefabricated single-storey industrial plant building systems and prefabricated multi-storey frame buildings. system, prefabricated slab building system, etc. By the 1980s, the application of prefabricated concrete buildings reached its heyday, and many parts of the country have formed a prefabricated concrete industrialized building model integrating design, production, construction and installation. Prefabricated concrete buildings and masonry buildings with prefabricated hollow-core slabs have become the two most important building systems, with an application penetration rate of over 70%. Due to the many limitations and deficiencies in the functions and physical properties of prefabricated buildings, the level of design and construction technology research and development of prefabricated concrete buildings in China has not kept up with the changes in social needs and the development of construction technology. By the mid-1990s, prefabricated concrete Buildings have been gradually replaced by all-cast-in-place concrete building systems. At present, except for the prefabricated single-story industrial plant building system, which is widely used. There are very few engineering applications of other prefabricated building systems. Insufficient research on the anti-seismic integrity of prefabricated structures and professional design and construction management results in poor technical and economic efficiency. It is the root cause of the long-term stagnation of prefabricated structures.

Utility model content

The purpose of the utility model is to provide a prefabricated concrete node and its dry connection method, solve the overall synergy performance of the prefabricated concrete sandwich wall, improve energy saving performance, significantly improve seismic performance, greatly reduce the number of connectors, and simplify construction , significantly improve its industrialization efficiency, promote the industrialization development process of my country's prefabricated concrete high-rise residential buildings, and reduce resource and energy consumption.

The utility model is realized by adopting the following technical proposals: an assembled concrete node, comprising a prefabricated stepped concrete beam and a prefabricated concrete column with an outstretched stepped beam;

The prefabricated concrete column with the overhanging stepped beam includes an upper column, a beam end, a lower ladder connector, an upper ladder connector, an arc-shaped installation opening and a lower column; the beam end includes a ladder mouth, a lower ladder beam, an upper ladder Beam; the upper step beam is fixedly connected under the upper column, and the lower step beam is fixedly connected under the upper step beam. Extending between the upper column 400mm-500mm; the lower stepped beam at one end and the upper stepped beam at one end form a step opening, and the heights of the lower stepped beam and the upper stepped beam are set to be equal; the upper end of the upper stepped beam is set internally There is an upper ladder connecting frame, and a lower ladder connecting frame is arranged inside the lower end of the lower ladder beam;

The prefabricated stepped concrete beam includes a prefabricated beam body, a stepped connection opening, a lower step opening, an upper step opening, a beam lower connecting frame, a beam upper connecting frame and an arc-shaped installation opening; one end of the prefabricated stepped concrete beam is provided with Step connection mouth, lower step opening and upper step opening, the heights of the lower step opening and the upper step opening are set to be equal; the lower end of the step opening is provided with a beam lower connecting frame, and the upper end of the upper step opening is provided with a beam upper connecting frame;

As a preferred technical solution, the upper ladder connecting frame includes connecting steel bars, connecting steel plates, and connecting screw holes, the connecting steel bars are arranged in the middle of the upper ladder connecting frame, and are evenly distributed, and the two ends of the connecting steel bars are respectively set Connecting steel plates, every other connecting steel bar is provided with a connecting screw hole,

The positions corresponding to the connecting screw holes of the upper ladder connecting frame are respectively provided with arc-shaped installation openings. The plane projection of the arc-shaped installation openings is an isosceles trapezoid, and the vertical plane projection of the beam is preferentially arc-shaped.

As a preferred technical solution, the beam lower connecting frame is arranged horizontally corresponding to the lower ladder connecting frame of the prefabricated concrete column with an overhanging stepped beam, and an arc-shaped installation is arranged on the beam lower connecting frame at the corresponding location. The upper connecting frame of the beam is arranged horizontally corresponding to the upper ladder connecting frame of the precast concrete column with the protruding stepped beam, and the upper connecting frame at the corresponding setting is provided with an arc-shaped installation opening.

Combined with Figure 6, a dry connection method for prefabricated concrete joints, the stepped joint of the prefabricated stepped concrete beam is lapped on the lower stepped beam of the prefabricated concrete column with an overhanging stepped beam, and the extension of the lower stepped beam Equal to the extension length of the ladder connection;

The upper stepped beam of the precast concrete column with an overhanging stepped beam and the upper stepped opening of the prefabricated stepped concrete beam are connected by arc bolts, and the lower stepped beam of the precast concrete column with an extended stepped The stepped mouth is connected by arc bolts,

The arc-shaped bolts are respectively installed and fastened through the arc-shaped installation openings on the prefabricated concrete columns with protruding stepped beams and the arc-shaped installation openings on the prefabricated stepped concrete beams;

The step opening and the step connection are matched with each other, the gap between the upper step beam of the precast concrete column with an overhanging step beam and the upper step opening of the precast step concrete beam is set to 10mm, and the lower step of the precast concrete column with an overhanging step beam The gap between the beam and the lower step opening of the prefabricated stepped concrete beam is set to 10mm by means of arc bolts, and the connecting vertical joint is filled with sealing material.

As a preferred technical solution, the sealing material includes foamed polyethylene rods and building structure waterproof glue, and the building structure waterproof glue is arranged on the outside of the foamed polyethylene rods.

Compared with the prior art, the utility model has the following beneficial effects: (1) Strong seismic performance, significantly improved stiffness, reduced number of connectors, significantly improved industrial efficiency, reduced resource and energy consumption, and generalization, Standardization, (2) The connection method adopts dry construction, which simplifies the construction, the connection is reliable, and the integrity is good.

Description of drawings

Figure 1 is a schematic plan view of a dry connection method for a prefabricated node.

Figure 2 is a schematic diagram of a column elevation of a prefabricated concrete column with an overhanging stepped beam;

Fig. 3 is a column top view schematic diagram of a prefabricated concrete column with an overhanging stepped beam;

Figure 4 is a schematic bottom view of a prefabricated concrete column with an overhanging stepped beam;

Figure 5 is a schematic elevation view of a prefabricated stepped concrete beam;

Fig. 6 is a schematic diagram of the upper ladder connecting frame;

FIG. 7 is a schematic cross-sectional view of FIG. 6B-B.

Explanation of the serial numbers in the figure: 1 is the prefabricated concrete column with the extended stepped beam; 2 is the prefabricated stepped concrete beam; 3 is the arc bolt; 4 is the foamed polyethylene rod; 5 is the building structure waterproof glue; 1-1 is the Upper column; 1-2 is the ladder mouth; 1-3 is the lower ladder beam; 1-4 is the upper ladder beam; 1-5 is the lower ladder connecting frame; 1-6 is the upper ladder connecting frame; 1-7 is the arc Installation port; 1-8 is the lower column; 2-1 is the prefabricated beam body; 2-2 is the ladder connection port; 2-3 is the lower step port; 2-4 is the upper step port; 2-5 is the beam lower connection frame ; 2-6 is the connecting frame on the upper part of the beam; 2-7 is an arc mounting opening.

detailed description

In order to further illustrate the utility model, the utility model will be described in detail below in conjunction with the accompanying drawings and embodiments, but they should not be understood as limiting the protection scope of the utility model.

1-5, a prefabricated concrete node, including a prefabricated stepped concrete beam 2, a prefabricated concrete column 1 with an overhanging stepped beam;

The prefabricated concrete column 1 with an overhanging ladder beam includes an upper column 1-1, a beam end, a lower ladder connecting frame 1-5, an upper ladder connecting frame 1-6, an arc-shaped installation opening 1-7 and a lower column 1- 8. The beam end includes a stepped opening 1-2, a lower stepped beam 1-3, and an upper stepped beam 1-4; an upper stepped beam 1-4 is fixedly connected under the upper column 1-1, and an upper stepped beam 1-4 4 The lower ladder beam 1-3 is fixedly connected below, both ends of the upper ladder beam 1-4 are extended between the lower column 1-8 200mm-300mm, and both ends of the lower ladder beam 1-3 are extended The column 1 -1 is between 1400mm-500mm; the lower stepped beam 1-3 at one end and the upper stepped beam 1-4 at one end form a stepped opening 1-2, and the lower stepped beam 1-3 and the upper stepped beam 1-4 The heights are set to be equal; the upper end of the upper ladder beam 1-4 is provided with an upper ladder connecting frame 1-6, and the lower end of the lower ladder beam (1-3) is provided with a lower ladder connecting frame 1-5;

The prefabricated stepped concrete beam 2 includes a prefabricated beam body 2-1, a ladder connection port 2-2, a lower step port 2-3, an upper step port 2-4, a beam lower connecting frame 2-5, and a beam upper connecting frame 2 -6 and arc-shaped installation opening 2-7; one end of the prefabricated stepped concrete beam (2) is provided with a ladder connecting port 2-2, a lower step opening 2-3 and an upper step opening 2-4, the lower step The heights of the mouth 2-3 and the upper stepped mouth (2-4) are set to be equal; the lower end of the stepped mouth 2-3 is provided with a beam lower connecting frame 2-5, and the upper end of the upper stepped mouth 2-4 is provided with Beam upper connecting frame 2-6;

As a preferred technical solution, the upper ladder connecting frame 1-6 includes connecting steel bars 1-6-1, connecting steel plates 1-6-2, connecting screw holes 1-6-3, connecting steel bars 1-6-1 It is arranged in the middle of the upper ladder connecting frame 1-6, and is evenly distributed. The two ends of the connecting steel bars 1-6-1 are respectively provided with connecting steel plates 1-6-2, and every 1-2 connecting steel bars 1-6 -1 is provided with 2-5 connecting screw holes 1-6-3,

The positions corresponding to the connecting screw holes 1-6-3 of the upper ladder connecting frame 1-6 are respectively provided with arc-shaped installation ports 1-7, and the plane projection of the arc-shaped installation ports 1-7 is an isosceles trapezoid. Planar projections are preferred over arcs.

As a preferred technical solution, the beam lower connecting frame 2-5 is horizontally arranged correspondingly to the lower ladder connecting frame 1-5 of the prefabricated concrete column 1 with an overhanging stepped beam, and is connected at the lower part of the beam at the corresponding location. The frame 2-5 is provided with an arc-shaped installation opening 2-7, and the beam upper connecting frame 2-6 is horizontally set corresponding to the upper ladder connecting frame 1-6 of the prefabricated concrete column 1 with an overhanging ladder beam, and in The upper connecting frame 2-6 at the corresponding setting is provided with an arc-shaped installation opening 2-7.

Combining with Fig. 6, a dry connection method for prefabricated concrete joints, the stepped connection port 2-2 of the prefabricated stepped concrete beam 2 is lapped on the lower stepped beam 1-3 of the precast concrete column 1 with an overhanging stepped beam , the extension length of the lower ladder beam 1-3 is equal to the extension length of the ladder connection port 2-2;

The upper stepped beam 1-4 of the precast concrete column 1 with an overhanging stepped beam is connected with the upper stepped opening 2-4 of the prefabricated stepped concrete beam 2 by means of arc bolts 3, and the lower part of the precast concrete column 1 with an overhanging stepped beam The stepped beam 1-3 is connected with the lower step opening 2-3 of the prefabricated stepped concrete beam 2 by means of arc bolts 3,

The arc-shaped bolts 3 are respectively installed and fastened through the arc-shaped installation openings 1-7 on the precast concrete column 1 with an overhanging stepped beam and the arc-shaped installation openings 2-7 on the prefabricated stepped concrete beam 2;

The step opening 1-2 and the step connection opening 2-2 fit each other, and the gap between the upper step beam 1-4 of the precast concrete column 1 with an overhanging step beam and the upper step opening 2-4 of the prefabricated stepped concrete beam 2 is set as 10mm, the gap between the lower step beam 1-3 of the precast concrete column 1 with the overhanging step beam 1 and the lower step opening 2-3 of the prefabricated stepped concrete beam 2 is set to 10mm, and the connecting vertical joint is filled Sealing material.

As a preferred technical solution, the sealing material includes a foamed polyethylene rod 4 and a building structure waterproof glue 5 , and the building structure waterproof glue 5 is arranged on the outside of the foamed polyethylene rod 4 .

In the utility model, the upper ladder beams 1-4 on both sides of the column preferably adopt the same group of upper ladder connecting frames 1-6, and the upper ladder connecting frames 1-6 pass through the node core area; the lower end of the lower ladder beams 1-3 is internally provided with The lower ladder connectors 1-5, the lower ladder beams 1-3 located on both sides of the column preferably use the same set of lower ladder connectors 1-5, and the lower ladder connectors (1-5) pass through the node core area.

The utility model has strong anti-seismic performance, significantly improved rigidity, reduces the number of connectors, significantly improves its industrialization efficiency, reduces resource and energy consumption, and can realize generalization and standardization.

The connection mode of the utility model adopts dry operation construction, which simplifies construction, has reliable connection and good integrity.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the scope of protection of the present utility model.

Claims (3)

1. A prefabricated concrete node, characterized in that, comprises a prefabricated stepped concrete beam (2), a prefabricated concrete column (1) with an overhanging stepped beam; The prefabricated concrete column (1) with the protruding ladder beam includes an upper column (1-1), a beam end, a lower ladder connecting frame (1-5), an upper ladder connecting frame (1-6), an arc-shaped installation opening (1-7) and the lower column (1-8); the beam end includes a ladder mouth (1-2), the lower ladder beam (1-3), and the upper ladder beam (1-4); the upper column ( 1-1) An upper stepped beam (1-4) is fixedly connected below, and a lower stepped beam (1-3) is fixedly connected below the upper stepped beam (1-4), and both ends of the upper stepped beam (1-4) are Overhang between the lower column (1-8) 200mm-300mm, both ends of the lower ladder beam (1-3) are overhanging between the upper column (1-1) 400mm-500mm; the lower ladder beam at one end ( 1-3) and the upper stepped beam (1-4) at one end to form a stepped opening (1-2), the height of the lower stepped beam (1-3) and the upper stepped beam (1-4) are set to be equal; the The upper end of the upper ladder beam (1-4) is provided with an upper ladder connecting frame (1-6), and the lower end of the lower ladder beam (1-3) is provided with a lower ladder connecting frame (1-5); The prefabricated stepped concrete beam (2) includes a prefabricated beam body (2-1), a stepped connection port (2-2), a lower stepped port (2-3), an upper stepped port (2-4), and a beam lower connection frame (2-5), beam upper connecting frame (2-6) and arc-shaped installation opening (2-7); one end of the prefabricated stepped concrete beam (2) is provided with a ladder connection opening (2-2), The lower step opening (2-3) and the upper step opening (2-4), the heights of the lower step opening (2-3) and the upper step opening (2-4) are set to be equal; the step opening (2-4) 3) The lower end of the beam is provided with a lower beam connecting frame (2-5), and the upper end of the upper step opening (2-4) is provided with a beam upper connecting frame (2-6). 2. A prefabricated concrete node according to claim 1, characterized in that, the upper ladder connecting frame (1-6) includes connecting steel bars (1-6-1), connecting steel plates (1-6-1) 6-2), the connecting screw holes (1-6-3), the connecting steel bar (1-6-1) is set in the middle of the upper ladder connecting frame (1-6), and is evenly distributed, and the connecting steel bar (1-6-1) -6-1) are provided with connecting steel plates (1-6-2) at both ends, and every 1-2 connecting steel bars (1-6-1) are provided with 2-5 connecting screw holes (1-6-3 ), The positions corresponding to the connecting screw holes (1-6-3) of the upper ladder connecting frame (1-6) are respectively provided with arc-shaped installation ports (1-7), and the plane projection of the arc-shaped installation ports (1-7) is Isosceles trapezoid. 3. A prefabricated concrete node according to claim 1, characterized in that, The beam lower connecting frame (2-5) is arranged horizontally corresponding to the lower ladder connecting frame (1-5) of the prefabricated concrete column (1) with an overhanging ladder beam, and the beam lower connecting frame ( 2-5) is provided with an arc-shaped installation opening (2-7), and the upper connecting frame (2-6) of the beam and the upper ladder connecting frame (1-6) of the prefabricated concrete column (1) with the protruding ladder beam ) are arranged horizontally, and the upper connecting frame (2-6) at the corresponding location is provided with an arc-shaped installation port (2-7).