A dry connection node for assembled concrete beams and columns

Abstract

The present invention provides a dry connection node for assembled concrete beams and columns, belonging to the field of building technology. It includes a precast concrete column, a precast concrete beam, a channel steel, an I-shaped steel, and a right-angle steel plate; a reserved hole for column transverse reinforcement is provided in the precast concrete column, a column embedded part A is provided on the right side of the upper part of the precast concrete column, an I-shaped steel is provided below the column embedded part A, a corbel is provided below the I-shaped steel, a corbel longitudinal bolt reserved hole is provided in the corbel, an I-shaped steel is provided on the right side of the corbel, and a column embedded part B is provided on the precast concrete column below the corbel; the advantages and effects of the present invention are that dry connection is adopted, the workload on site is small, the connection is reliable, the force transmission is clear, the integrity is good, the components are standardized, and it is suitable for the industrial development of assembled concrete buildings.

Description

Technical Field

[0001] The invention belongs to the field of building technology, and in particular relates to a dry connection node of assembled concrete beams and columns. Background Art

[0002] Prefabricated concrete buildings refer to concrete structures that are mainly prefabricated concrete components produced in factories and designed and constructed through on-site assembly. The assembly methods of components generally include on-site post-casting of superimposed layers of concrete, steel bar anchoring and post-casting of concrete connections, etc. Steel bar connections can be made by sleeve grouting, welding, mechanical connection, and reserved hole overlap connection. In the 1980s, the prefabricated large-panel houses that were popular in my country had many hidden dangers and defects that affected structural safety and normal use due to poor structural integrity, leakage, floor cracks, etc., and were gradually replaced by cast-in-place concrete structures. However, with the current application of emerging prefabricated concrete structures, especially the introduction of many advanced foreign technologies in recent years, localized new technologies for the construction of prefabricated concrete structures are gradually taking shape.

[0003] With the acceleration of the process of "construction industrialization and housing industrialization" in my country, and the continuous reduction of China's "demographic dividend", the labor shortage in the construction industry has emerged, and the trend of residential industrialization has become increasingly obvious. The application of prefabricated concrete structures has once again become a current research hotspot. New technologies and new forms of prefabricated concrete structures for residential buildings are constantly emerging across the country. Prefabricated reinforced concrete structure is one of the important directions for the development of building structures in my country. It is conducive to the development of my country's construction 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.

[0004] Compared with cast-in-place construction methods, prefabricated RC structures are conducive to green construction, because 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 interference, saving water, electricity, materials and other resources and energy, and following the principle of sustainable development. Moreover, prefabricated structures can continuously complete multiple or all processes of the project in sequence, thereby reducing the types and number of engineering machinery entering the site, eliminating the idle time of process connection, realizing three-dimensional cross-operation, reducing construction personnel, thereby improving work efficiency, reducing material consumption, reducing environmental pollution, and providing guarantees for green construction. In addition, prefabricated structures 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, and waste concrete.

[0005] Prefabricated concrete buildings can be divided into two categories according to the degree of assembly: fully assembled and partially assembled. Fully assembled buildings are generally limited to low-rise or multi-story buildings with low seismic fortification requirements; the main components of partially assembled concrete buildings are generally prefabricated components, connected on site by cast-in-place concrete, forming an assembled integral structure.

[0006] 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-story industrial plant building system, prefabricated multi-story frame building system, prefabricated large-plate building system, etc. By the 1980s, the application of prefabricated concrete buildings reached its heyday, and many places across the country had formed a prefabricated concrete industrialized building model that integrated design, production, construction and installation. Prefabricated concrete buildings and masonry buildings using prefabricated hollow slabs have become the two most important building systems, with an application penetration rate of more than 70%. Due to the many limitations and shortcomings of the functions and physical properties of prefabricated buildings, the research and development level of prefabricated concrete building design and construction technology in my country has not kept up with the changes in social demand and the development of construction technology. By the mid-1990s, prefabricated concrete buildings have gradually been replaced by fully cast-in-place concrete building systems. At present, except for the widely used prefabricated single-story industrial plant building system. There are very few engineering applications of other prefabricated prefabricated building systems. Insufficient research on the integrity of prefabricated structure seismic resistance and professional design and construction management has resulted in poor technical and economic performance. This is the fundamental reason why prefabricated structures have been in a state of stagnation for a long time. Summary of the invention

[0007] In order to solve the above-mentioned technical problems, the present invention provides a dry connection node for assembled concrete beams and columns, which mainly solves the problems of complex on-site construction, large resource consumption, and poor bending and shear resistance of beam ends.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A dry connection node of an assembled concrete beam-column, comprising a precast concrete column, a precast concrete beam, a channel steel, an I-shaped steel, and a right-angle steel plate;

[0010] A reserved hole for column transverse reinforcement is provided in the precast concrete column, a column embedded part A is provided on the right side of the upper part of the precast concrete column, an I-shaped steel is provided below the column embedded part A, a corbel is provided below the I-shaped steel, a reserved hole for corbel longitudinal bolts is provided in the corbel, an I-shaped steel is provided on the right side of the corbel, and a column embedded part B is provided on the precast concrete column below the corbel;

[0011] A notch is provided at the lower side of the end of the precast concrete beam, a reserved hole for the transverse reinforcement of the beam is provided at the top of the precast concrete beam, a reserved hole for the longitudinal bolt of the beam is provided in the middle, and a channel steel is provided on the left side of the end of the precast concrete beam and on the left side of the notch;

[0012] The notch of the precast concrete beam is overlapped with the corbel. After the I-beam and the channel steel are engaged with each other, two right-angle steel plates are placed on the upper and lower sides of the end of the precast concrete beam respectively. One side of the two right-angle steel plates is fixed to the column embedded parts A and the column embedded parts B respectively, and the other side is fixed to the precast concrete beam and the corbel by bolts. The steel bars are passed through the reserved holes for the column transverse steel bars and the reserved holes for the beam transverse steel bars in turn, and fixed by sleeve grouting.

[0013] Furthermore, the size of the notch on the lower side of the end of the precast concrete beam is consistent with the size of the corbel.

[0014] Furthermore, there is no gap between the channel steel and the I-shaped steel after being inserted into each other.

[0015] Furthermore, a right-angle steel plate reserved hole is provided on the right-angle steel plate, and the positions of the right-angle steel plate reserved hole, the corbel longitudinal bolt reserved hole, and the beam longitudinal bolt reserved hole correspond to each other.

[0016] Beneficial effects of the present invention:

[0017] The effects and advantages of the present invention are that the connection method adopts dry construction, which simplifies the construction; the concrete beams, columns and corbels are reliably connected, have good integrity and excellent seismic performance; the components are standardized, which significantly improves the industrialization efficiency, adapts to the industrialization development of prefabricated concrete buildings, and reduces resource and energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the connection between precast concrete columns and precast concrete beams.

[0019] Figure 2 Schematic diagram of precast concrete column structure.

[0020] Figure 3 Schematic diagram of precast concrete beam structure.

[0021] Figure 4 Schematic diagram of the right-angle steel plate structure.

[0022] Figure 5 This is a schematic diagram of the I-beam steel structure.

[0023] Figure 6 This is a schematic diagram of the channel steel structure.

[0024] Figure 7 This is a schematic diagram of the connection between I-beam and channel steel.

[0025] In the figure: 1 is a precast concrete column; 2 is a precast concrete beam; 3 is a channel steel; 4 is an I-shaped steel; 5 is a right-angle steel plate;

[0026] 1-1 is the reserved hole for the transverse reinforcement of the column; 1-2 is the reserved hole for the longitudinal bolts of the corbel; 1-3 is the embedded part A of the column; 1-4 is the corbel; 1-5 is the embedded part B of the column; 2-1 is the reserved hole for the transverse reinforcement of the beam; 2-2 is the reserved hole for the longitudinal bolts of the beam; 5-1 is the reserved hole for the right-angle steel plate. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0028] Example: Figure 1-Figure 7 As shown, a dry connection node of an assembled concrete beam-column of the present invention comprises a precast concrete column 1, a precast concrete beam 2, a channel steel 3, an I-shaped steel 4, and a right-angle steel plate 5;

[0029] A reserved hole 1-1 for column transverse reinforcement is provided in the precast concrete column 1, a column embedded part A1-3 is provided on the right side of the upper part of the precast concrete column 1, an I-shaped steel 4 is provided below the column embedded part A1-3, a bracket 1-4 is provided below the I-shaped steel 4, a bracket longitudinal bolt reserved hole 1-2 is provided in the bracket 1-4, an I-shaped steel 4 is provided on the right side of the bracket 1-4, and a column embedded part B1-5 is provided on the precast concrete column 1 below the bracket 1-4;

[0030] A notch is provided at the lower side of the end of the precast concrete beam 2, a reserved hole 2-1 for beam transverse reinforcement is provided at the top of the precast concrete beam 2, a reserved hole 2-2 for beam longitudinal bolts is provided in the middle, and a channel steel 3 is provided on the left side of the end of the precast concrete beam 2 and on the left side of the notch;

[0031] The notch of the precast concrete beam 2 is overlapped with the corbel 1-4. After the I-beam 4 and the channel steel 3 are locked with each other, the two right-angle steel plates 5 are respectively placed on the upper and lower sides of the end of the precast concrete beam 2. One side of the two right-angle steel plates 5 is respectively fixed to the column embedded parts A1-3 and the column embedded parts B1-5, and the other side is fixed to the precast concrete beam 2 and the corbel 1-4 by bolts. The steel bars are passed through the reserved holes 1-1 for the column transverse steel bars and the reserved holes 2-1 for the beam transverse steel bars in turn, and fixed by sleeve grouting.

[0032] The size of the notch on the lower side of the end of the precast concrete beam 2 is consistent with the size of the corbels 1-4.

[0033] There is no gap after the channel steel 3 and the I-shaped steel 4 are inserted into each other.

[0034] The right-angle steel plate 5 is provided with a right-angle steel plate reserved hole 5-1, and the right-angle steel plate reserved hole 5-1, the bracket longitudinal bolt reserved hole 1-2, and the beam longitudinal bolt reserved hole 2-2 are located in corresponding positions.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A dry connection node of an assembled concrete beam-column, comprising a precast concrete column (1), a precast concrete beam (2), a channel steel (3), an I-shaped steel (4), and a right-angle steel plate (5), characterized in that: The precast concrete column (1) is provided with a reserved hole (1-1) for column transverse reinforcement, a column embedded part A (1-3) is arranged on the right side of the upper part of the precast concrete column (1), an I-shaped steel (4) is arranged below the column embedded part A (1-3), a bracket (1-4) is arranged below the I-shaped steel (4), a bracket longitudinal bolt reserved hole (1-2) is arranged in the bracket (1-4), an I-shaped steel (4) is arranged on the right side of the bracket (1-4), and a column embedded part B (1-5) is arranged on the precast concrete column (1) below the bracket (1-4); a notch is arranged at the lower side of the end of the precast concrete beam (2), a reserved hole (2-1) for beam transverse reinforcement is arranged on the top of the precast concrete beam (2), a reserved hole (2-2) for beam longitudinal bolt is arranged in the middle, and the precast concrete beam (2) is provided with a hole (2-1) for beam transverse reinforcement. A channel steel (3) is respectively arranged on the left side of the end of the concrete beam (2) and the left side of the notch; the notch of the precast concrete beam (2) is overlapped with the corbel (1-4); after the I-shaped steel (4) and the channel steel (3) are mutually engaged, two right-angle steel plates (5) are respectively arranged on the upper and lower sides of the end of the precast concrete beam (2); one side of the two right-angle steel plates (5) is respectively fixed to the column embedded part A (1-3) and the column embedded part B (1-5); the other side is fixed to the precast concrete beam (2) and the corbel (1-4) by bolts; the steel bars are sequentially passed through the reserved hole (1-1) of the column transverse steel bars and the reserved hole (2-1) of the beam transverse steel bars, and fixed by sleeve grouting; the size of the notch on the lower side of the end of the precast concrete beam (2) is consistent with the size of the corbel (1-4); The channel steel (3) and the I-shaped steel (4) are aligned and plugged into each other without any gap.

2. The dry connection node of a prefabricated concrete beam-column according to claim 1, characterized in that: The right-angle steel plate (5) is provided with a right-angle steel plate reserved hole (5-1), and the right-angle steel plate reserved hole (5-1), the bracket longitudinal bolt reserved hole (1-2), and the beam longitudinal bolt reserved hole (2-2) are located in corresponding positions.

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