CN206289736U - A kind of assembly concrete beam-column connection - Google Patents

Abstract

The utility model provides a prefabricated concrete beam-column connection node, including a prefabricated column, a prefabricated beam, and a joint connection member connecting the prefabricated column and the prefabricated beam, holes are reserved on the prefabricated column, and longitudinal reinforcement of the beam is pre-embedded in the prefabricated beam. Node connection components include steel bars, reinforced steel bars, stirrups and cast-in-place concrete; four layers of reserved channels are set on the prefabricated columns. Beam-column connection node area. The utility model realizes the connection between the prefabricated column and the prefabricated beam through the joint connecting member composed of steel bar, steel bar welding and cast-in-place concrete. The connecting member has simple structure, good integrity, superior seismic performance, and significantly improves its industrialization efficiency. , and can achieve generalization and standardization.

Description

A prefabricated concrete beam-column joint

technical field

The utility model belongs to the field of structural engineering, in particular to an assembled concrete beam-column connection node.

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", the labor shortage in the construction industry has become 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.

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.

As we all know, the frame structure can work as a whole, and the reliable connection between frame beams and frame columns is very critical. Due to the cast-in-place concrete of traditional concrete structures and the continuous arrangement of stressed steel bars in the joint area, as long as reasonable steel bars are configured, there will generally be no connection damage between components; however, in the actual construction process of precast concrete structures, the construction location of the joints It is not easy, so the construction speed and efficiency are reduced; for precast concrete structures, whether the connection quality of components can be guaranteed is the key to whether the entire structure can perform the design function, and the shear bearing capacity and ductility of the joints of prefabricated structures usually cross , it is easy to become a weak part of the structural system, thus posing a threat to the safety of the entire structure.

In the commonly used prefabricated structure, the connection of prefabricated beams and prefabricated columns is concentrated in the core area of the beam-column intersection, and the core area of the beam-column intersection is a complex part of the force. The handover of multiple components will inevitably aggravate its complex performance and affect the frame structure. Integrality; In addition, there are also few cases where the beam connection node is set outside the column, the column is prefabricated as a whole, and the prefabricated steel member is used to extend out of the column edge to connect with the prefabricated beam; but in this connection method, the steel member inside the prefabricated column will be It affects the penetration of the column reinforcement and increases the difficulty of production; at the same time, the steel members protruding from the column edge will cause the column surface to be uneven, thus increasing the difficulty of transportation and storage of the prefabricated column.

Contents of the invention

In view of the above problems, the utility model provides an assembled concrete beam-column connection node for assembling the beam-column in the integral frame.

A prefabricated concrete beam-column connection node, including a prefabricated concrete beam, a prefabricated concrete column, and a node connection member; The concrete column includes a column connection part and a reserved channel; the node connection member includes steel bars, cast-in-place concrete, reinforced steel bars and stirrups; the prefabricated concrete beam and the prefabricated concrete column form a cross structure through the node connection member; the column connection part is horizontal There is a reserved hole in the axial direction, and the node connecting member passes through the reserved hole and connects the left precast concrete beam and the right precast concrete beam respectively through the beam connection end, and the cast-in-place concrete is filled between the beam connection end and the column connection part.

As a preferred technical solution: the reserved channels are divided into upper, middle upper, middle lower and lower layers of channels, the walls of the reserved channels are rough; the steel bars pass through the upper and lower layers of the reserved channels, and are welded to the The longitudinal reinforcement is connected; the reinforced reinforcement passes through the upper middle and lower layers of the reserved tunnel, and is connected to the beam connection end by welding; the grouting between the hole wall and the reinforcement is dense.

As a preferred technical solution: the uppermost and lower ends of the left precast concrete beam and the right precast concrete beam are pre-embedded with beam longitudinal reinforcement parallel to the precast concrete beam, and the outer side of the beam longitudinal reinforcement protrudes from the end surface of the beam connection end.

As a preferred technical solution: the stirrups are cross-welded or bound to the steel bars, reinforcing steel bars and beam longitudinal bars between the connection ends of the beams in the node connection members to play a fixing role.

As a preferred technical solution: the welding is electric resistance welding.

The beneficial effects of the utility model are: (1) the connection method adopts dry construction, which simplifies the construction; (2) the connection is reliable, the integrity is good, it has superior seismic performance, the stiffness is significantly improved, and its industrialization efficiency is significantly improved, and resources and resources are reduced. energy consumption, and can be generalized and standardized.

Description of drawings

Fig. 1 is an overall schematic diagram of a prefabricated concrete beam-column connection node;

Fig. 2 is a front schematic view of an assembled concrete prefabricated column;

Fig. 3 is a schematic diagram of the left side of an assembled concrete prefabricated column;

Fig. 4 is a prefabricated column schematic diagram of a reinforced longitudinal bar and a reinforcing bar of a prefabricated concrete beam-column connection node;

Fig. 5 is a schematic diagram of the overall structure of a prefabricated concrete beam-column connection node;

In the figure: 1 precast concrete beam, 11 left precast concrete beam, 12 right precast concrete beam, 13 beam longitudinal reinforcement, 14 beam connection end, 2 precast concrete column, 21 column connection part, 22 reserved channel, 3 node connecting member, 31 steel bars, 32 cast-in-place concrete, 33 reinforced steel bars, 34 stirrups.

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.

With reference to accompanying drawing 1-accompanying drawing 5, a kind of prefabricated concrete beam-column connection node comprises precast concrete beam 1, precast concrete column 2 and node connecting member 3; Said precast concrete beam 1 comprises left precast concrete beam 11, right precast Concrete beam 12, beam longitudinal reinforcement 13 and beam connection end 14; said prefabricated concrete column 2 includes column connection part 21 and reserved channel 22; Stirrups 34; precast concrete beams 1 and precast concrete columns 2 form a criss-cross structure through node connecting members 3; column connecting parts 21 are provided with reserved channels 22 in the horizontal axis, and node connecting members 3 pass through the reserved channels 22 or so The left precast concrete beam 11 and the right precast concrete beam 12 are respectively connected through the beam connecting end 14 , and the cast-in-place concrete 32 is filled between the beam connecting end 14 and the column connecting portion 21 .

The reserved channels 22 are divided into upper, middle upper, middle lower and lower layers of channels, and the walls of the reserved channels 22 are rough; the steel bars 31 pass through the upper and lower layers of the reserved channels 22, and are welded to the beam longitudinal reinforcement 13 Connecting; the reinforced steel bar 33 passes through the upper middle and lower layers of the reserved tunnel 22, and is connected to the beam connection end 14 by welding; the grouting between the hole wall and the steel bar 31 is dense.

The uppermost and lowermost ends of the left precast concrete beam 11 and the right precast concrete beam 12 are parallel to the precast concrete beam 1 and are pre-embedded with beam longitudinal reinforcement 13, and the outer side of the beam longitudinal reinforcement 13 protrudes from the end surface of the beam connection end 14.

The stirrups 34 are cross-welded or bound to the steel bars 31, reinforcing steel bars 33 and beam longitudinal bars 13 between the beam connection ends 14 of the node connecting member 3 to play a fixing role.

The welding is resistance welding.

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

Claims (5)

1. a kind of assembly concrete beam-column connection, it is characterised in that：Including precast concrete beam（1）, precast concrete Post（2）And node connecting elements（3）；The precast concrete beam（1）Including left precast concrete beam (11), right concrete Tu Liang（12）, the vertical muscle of beam（13）And beam connection end（14）；The precast concrete column (2) includes post connecting portion（21）With it is reserved Duct（22）；The node connecting elements（3）Including reinforcing bar（31）, cast-in-place concrete（32）, stiffener（33）And stirrup （34）；Precast concrete beam（1）And precast concrete column（2）By node connecting elements（3）In criss-cross construction；Post is connected Portion（21）Reserving hole channel is provided with horizontal axis（22）, node connecting elements（3）Through reserving hole channel（22）Left and right leads to respectively Lintel connection end（14）It is connected with left precast concrete beam (11) and right precast concrete beam（12）, cast-in-place concrete（32）Filling In beam connection end（14）With post connecting portion（21）Between.

2. a kind of assembly concrete beam-column connection according to claim 1, it is characterised in that：The reserving hole channel （22）Be divided into, in it is upper, under, lower four layers of duct, reserving hole channel（22）Hole wall is coarse；Reinforcing bar（31）Through reserving hole channel（22） Upper and lower layer, by welding with beam indulge muscle（13）Connect；Stiffener（33）Through reserving hole channel（22）In it is upper and under Layer, by being connected to beam connection end（14）；Hole wall and reinforcing bar（31）Between be in the milk closely knit.

3. a kind of assembly concrete beam-column connection according to claim 1, it is characterised in that：The left side is prefabricated mixed Solidifying Tu Liang（11）With right precast concrete beam（12）The top and the parallel precast concrete beam in bottom（1）Beam is embedded with to indulge Muscle（13）, beam indulges muscle（13）Beam connection end is stretched out in outside（14）End face.

4. a kind of assembly concrete beam-column connection according to claim 1, it is characterised in that：The stirrup（34） Cross weld or colligation are in node connecting elements（3）Central sill connection end（14）Between reinforcing bar（31）, stiffener（33）And beam Vertical muscle（13）On.

5. a kind of assembly concrete beam-column connection according to claim 2, it is characterised in that：Described is welded as Resistance is welded.